WO2007063628A1

WO2007063628A1 - Cathode ray tube, method of manufacturing cathode ray tube, lighting apparatus using the cathode ray tube, method of manufacturing lighting apparatus, manufacturing apparatus for lighting apparatus, and liquid crystal device

Info

Publication number: WO2007063628A1
Application number: PCT/JP2006/316406
Authority: WO
Inventors: Yoshikazu Umeno
Original assignee: Sharp Kabushiki Kaisha
Priority date: 2005-11-30
Filing date: 2006-08-22
Publication date: 2007-06-07

Abstract

A cold cathode discharge tube comprising a glass tube (1) and a bottomed cylindrical external terminal (2) fitted into the end part of the glass tube. An introduction wire (4) connected to an electrode (3) positioned in the glass tube is passed through a hole (2b) formed in the bottom part (2a) of the external terminal, and welded to the external terminal on the outside of the hole. A filler (6) is filled in a clearance between the external terminal and the glass tube to increase the strength of the external terminal.

Description

Specification

Pi¾ray tube, cathode ray tube manufacturing method, lighting device using the cathode ray tube, lighting device manufacturing method, lighting device manufacturing device, and liquid crystal display device

Technical field

The present invention relates to a cold cathode ray tube having an internal electrode, a cathode ray tube such as a thermal cathode ray tube, a method of manufacturing a cathode ray tube, a lighting device using the cathode ray tube, a method of manufacturing a lighting device, and a method of manufacturing a lighting device The present invention relates to a device and a night crystal display device.

Background art

[0002] For example, as a slave * W relating to a cold tube (CCFT: Cold Cathode Fluorescent Tube) used for a backlight of a liquid crystal display device, there is an external terminal structure of a cold knife disclosed in Patent Document 1, for example.

In the external structure of the cold: Ding disclosed in this publication, as shown in FIG. 20, external terminals 1 1 o provided on both sides of a tubular cold glass tube 10 1 Is a cylindrical cap with a bottom that is fitted into both cold 0 and β, and the hole 1 1 2 formed in the bottom 1 1 1 of the cap has an inner m¾ l 1 Introductory rod connected to 3 1 1 4 It consists of a force welded by 1 5.

Patent Document 1: Japanese Utility Model Gazette “Japanese Utility Model Publication No. 64-48851 (published on Mar. 27, 1989)” In the above-mentioned conventional chilled pipe, the stress applied to the thread li! B binding As a result, the cap is recessed, which causes the problem of ^^ and disconnection.

Disclosure of the invention

[0004] The present invention has been made in view of the above-described conventional problems, and an object of the present invention is to provide a cathode tube, a cathode ray tube, and a cathode ray tube that can prevent defects and disconnection due to a recess in a bottomed cylindrical external terminal. It is to provide a manufacturing method, a lighting device using the shaded first-line tube, a manufacturing method of the lighting device, and a liquid crystal display device.

[0005] In order to solve the above-mentioned defects, the wire tube of the present invention is provided with a bottomed cylindrical outer tube fitted to each | 5 of the glass tube, and connected to each inside of the glass tube. The lead-in wire is connected to the outside of the hole formed in the bottom of the above terminal.

¾ paper (Rule 91) In the cathode ray tube, a filler is enclosed in a space between the bottomed cylindrical external terminal and the glass tube.

[0006] In addition, in order to solve the above problems, the cathode ray tube manufacturing method of the present invention is provided with a bottomed cylindrical external terminal fitted to each end portion of the glass tube, and each of the components in the glass tube. In the method of manufacturing a cathode ray tube, wherein the lead-in wire connected to the internal electrode is welded to the outside of the hole formed at the bottom of the external terminal, the bottomed cylindrical external terminal, the glass tube, and A filler is sealed in the space between the two.

[0007] In the present invention, a cold cathode tube (CFT: Cold atnode Fluorescent Tube) and a hot cathode ray as a cathode ray tube having an internal electrode in a glass tube. This applies to tubes (HCFT: Hot Cathode Fluorescent Tube). Therefore, an external electrode fluorescent tube (EEFL) that does not have an internal electrode in the glass tube is not covered.

[0008] According to the above invention, the filler is sealed in the space between the bottomed cylindrical external terminal and the glass tube. For this reason, if the external terminal is recessed due to the stress applied to the socket holding the external terminal or during other assembly, etc.!

Accordingly, it is possible to provide a cathode ray tube capable of preventing poor fitting and disconnection due to the recess of the bottomed cylindrical external terminal, and a method for manufacturing the cathode ray tube.

[0010] Further, in the cathode ray tube of the present invention, it is preferable that the hole formed in the bottom of the external terminal is formed to project outwardly in a pointed shape.

[0011] Further, in the method of manufacturing a cathode ray tube of the present invention, it is preferable to use a hole formed at the bottom of the external terminal so as to protrude outwardly in a pointed shape. Yes.

[0012] Thereby, it is difficult for the filler to leak the hole force. Moreover, even if the filler leaks from the hole, it does not spread around the outside of the external terminal. Therefore, when the lead-in wire and the external terminal are welded, the welding material is not disturbed by the overflow of the filler, so that welding can be easily performed.

[0013] In the cathode ray tube of the present invention, it is preferable that the filler includes a thermosetting resin, a molten metal, or an inorganic filler. [0014] In the method for producing a cathode ray tube of the present invention, it is preferable to use a thermosetting resin, a molten metal, or an inorganic filler as the filler.

[0015] Thereby, the filler can be reliably sealed in the space between the bottomed cylindrical external terminal and the glass tube.

[0016] In the method of manufacturing a cathode ray tube of the present invention, it is preferable that a filler is applied to the inside of the cylindrical portion of the bottomed cylindrical external terminal, and then the external terminal is fitted to the glass tube.

[0017] Thereby, the filler is filled in the entire space between the glass tube and the external terminal. In particular, it is possible to ensure the close contact between the cylindrical portion of the external terminal and the glass tube.

[0018] In the method of manufacturing a cathode ray tube of the present invention, it is preferable that an external terminal is fitted to the glass tube after a filler is applied to the lead-out portion of the glass tube.

Thereby, the filler is filled in the entire space between the glass tube and the external terminal. In particular, the lead-out portion of the glass tube is reliably sealed. For this reason, even if stress is applied to the lead-in wire, the lead-out portion of the lead-in wire is surely in close contact, so that the lead-out force of the lead wire can also prevent the gas in the glass tube from leaking.

[0020] Further, in order to solve the above-described problem, the illumination device of the present invention is the illumination device described above, and includes a circuit board provided below a base substrate of the illumination device body, and the illumination device body. The circuit board that is erected on the circuit board so as to pass through an opening provided in the base substrate of the circuit board and supports the external terminal of the cathode ray tube, thereby controlling lighting of the cathode ray tube and the cathode ray tube And a socket for electrically connecting the two.

[0021] Further, in order to solve the above problems, the method for manufacturing the lighting device according to the present invention is the method for manufacturing the lighting device described above, wherein the socket is erected on a circuit board, and the circuit is provided. A step of passing a socket erected on the substrate through an opening provided in a base substrate of the lighting device body, a step of attaching the circuit board to the back surface of the base substrate of the lighting device body, and a step of attaching a cathode ray tube to the socket Including.

[0022] In the conventional lighting device and the manufacturing method thereof, first, lead wires are respectively soldered to the lead wires at both ends of the cathode ray tube on the front side of the base substrate of the lighting device body. In addition, there is a connector for connecting to the circuit board at the end of the lead wire. It was necessary to connect to a circuit board provided on the back surface of the base substrate through a narrow opening provided in the base substrate. Therefore, the workability was poor.

However, according to the present invention, when manufacturing the lighting device, first, the socket is erected on the circuit board, and then the socket erected on the circuit board is provided on the base substrate of the illuminating device body. Pass through the opening. Then, the circuit board is attached to the back surface of the base board of the lighting device body. Thereafter, the cathode ray tube is attached to the socket.

[0024] As a result, the mounting structure of the cathode ray tube of the lighting device is simplified, and the assembly process does not require detailed work of passing connectors and lead wires to the back surface force of the base board of the lighting device body. At the same time, it is not necessary to reverse the lighting device body to connect the connector, and the number of assembly steps can be reduced.

[0025] Further, in order to solve the above-described problem, the lighting device of the present invention is a lighting device using a plurality of the cathode ray tubes described above, and includes a circuit board provided with a plurality of lamp sockets and the plurality of lamps. A backlight base having a plurality of through holes that pass through the sockets, and the circuit board having the backlight base and the plurality of lamp sockets is provided in the plurality of through holes of the backlight base. The lamp sockets are stacked so as to be penetrated, and the bottomed cylindrical external terminal of the cathode ray tube is inserted into the lamp socket.

[0026] Further, in order to solve the above-described problem, a method for manufacturing an illuminating device according to the present invention is a method for manufacturing the illuminating device described above, wherein the cathode ray tube is preliminarily arranged in accordance with an actual lamp pitch. The step of pre-arranging, the step of collectively adsorbing the cathode ray tubes existing in the pre-arranged tray, and the bottomed cylindrical external terminals of the plurality of the collectively adsorbed cathode ray tubes as lamp sockets in the backlight base And inserting into.

[0027] Thus, even in a cathode ray tube having a bottomed cylindrical external terminal, lamp assembly and replacement can be completed only from the surface direction of the backlight base. By removing the circuit board laminated on the back side, the knocklight base and the cathode ray tube can be easily separated.

[0028] Further, in order to solve the above problems, a liquid crystal display device of the present invention includes the above-described illumination device as a backlight. [0029] According to the above invention, it is possible to provide a liquid crystal display device provided with a lighting device as a backlight that can prevent poor fitting and disconnection due to a recess in the bottomed cylindrical external terminal.

[0030] Still other objects, features, and advantages of the present invention will be sufficiently improved by the following description. The benefits of the present invention will become apparent from the following description with reference to the accompanying drawings.

Brief Description of Drawings

FIG. 1 is a cross-sectional view showing an embodiment of a cathode ray tube according to the present invention.

FIG. 2 is a perspective view showing a configuration of a socket that supports the cathode ray tube.

FIG. 3 is a perspective view showing a configuration of a backlight unit in which a plurality of cathode ray tubes attached to the socket are arranged side by side.

FIG. 4 (a) is a perspective view showing a manufacturing process of the cathode ray tube.

FIG. 4 (b) is a perspective view showing the manufacturing process of the cathode ray tube.

FIG. 4 (c) is a perspective view showing a manufacturing process of the cathode ray tube.

FIG. 5 (a) is a cross-sectional view showing the manufacturing process of the cathode ray tube.

FIG. 5 (b) is a cross-sectional view showing the manufacturing process of the cathode ray tube.

FIG. 5 (c) is a cross-sectional view showing the manufacturing process of the cathode ray tube.

FIG. 5 (d) is a cross-sectional view showing the manufacturing process of the cathode ray tube.

FIG. 5 (e) is a cross-sectional view showing the manufacturing process of the cathode ray tube.

FIG. 6 (a) is a cross-sectional view showing another manufacturing process of the cathode ray tube.

FIG. 6 (b) is a cross-sectional view showing another manufacturing process of the cathode ray tube.

FIG. 6 (c) is a cross-sectional view showing another manufacturing process of the cathode ray tube.

FIG. 6 (d) is a cross-sectional view showing another manufacturing process of the cathode ray tube.

FIG. 6 (e) is a cross-sectional view showing another manufacturing process of the cathode ray tube.

FIG. 7 (a) is a cross-sectional view showing still another manufacturing process of the cathode ray tube.

FIG. 7 (b) is a cross-sectional view showing still another manufacturing process of the cathode ray tube.

FIG. 7 (c) is a cross-sectional view showing still another manufacturing process of the cathode ray tube.

FIG. 7 (d) is a cross-sectional view showing still another manufacturing process of the cathode ray tube. 圆 7 (e)] A sectional view showing still another manufacturing process of the cathode ray tube.

圆 8 (a)] A sectional view showing still another manufacturing process of the cathode ray tube.

{Circle around (8)} FIG. 8B is a cross-sectional view showing still another manufacturing process of the cathode ray tube.

{Circle around (8)} FIG. 8C is a cross-sectional view showing still another manufacturing process of the cathode ray tube.

{Circle around (8)} FIG. 8D is a cross-sectional view showing still another manufacturing process of the cathode ray tube.

圆 8 (e)] A sectional view showing still another manufacturing process of the cathode ray tube.

FIG. 9 shows another embodiment of the cathode ray tube according to the present invention, and is an exploded perspective view showing a backlight unit including the cathode ray tube and a liquid crystal display device including the backlight unit.

FIG. 10 is a cross-sectional view showing a configuration of the backlight unit.

[11] FIG. 11 is an exploded perspective view showing a process of attaching a socket to a circuit board in the manufacture of the backlight unit.

FIG. 12 is an exploded perspective view showing a process of passing a socket of a circuit board through an opening of the backlight base in manufacturing the backlight unit.

13] An exploded perspective view showing the manufacturing process of the liquid crystal display device.

[FIG. 14] (a), (b), and (c) are perspective views for explaining the structure of a harnessless lamp.

FIG. 15 is a schematic view showing a configuration of a lamp insertion device which is a manufacturing device of the liquid crystal display device.

16] A perspective view showing the entire process of inserting the lamp, showing the manufacturing process of the liquid crystal display device.

FIG. 17 is a perspective view showing a manufacturing process of the liquid crystal display device and showing a pre-arrangement process in accordance with an actual lamp pitch in advance.

FIG. 18 is a perspective view showing a manufacturing process of the liquid crystal display device and a process of collectively sucking cold cathode ray tubes aligned on a pre-arranged tray.

FIG. 19 is a perspective view showing a manufacturing process of the liquid crystal display device, and showing a process of inserting cold-adsorbed cold cathode ray tubes into a lamp socket in a backlight base.

FIG. 20 is a cross-sectional view showing a configuration of a conventional cold cathode ray tube.

FIG. 21 is a cross-sectional view showing a configuration of a conventional backlight using a lamp with a harness. [22] FIG. 22 is a perspective view showing a configuration of the lamp with harness.

FIG. 23 is a cross-sectional view showing a configuration of a harnessless lamp.

[FIG. 24] (a), (b), and (c) are perspective views showing a process of attaching the harnessless lamp to the lamp socket.

Explanation of symbols

1 Glass tube

la Outlet (outlet of the lead-in line)

2 External terminal

2a Bottom

2b hole

3 Internal electrode

4 Introduction line

5 Welded part

6 Filler

10 Cold cathode ray tube (cathode ray tube)

20 Knock Light Knitted Body (Lighting Device Body)

21 socket

21a Clamping part

30 Knock Light Unit (Lighting device)

30a Luminous space

31 Knock light base (base substrate)

31a opening

31b Tube

32 Circuit board

35 Light guide plate

36 Lens sheet

37 Diffusion sheet

0 LCD display panel 41 Polarizing plate

42 Liquid crystal display (LCD) panel

43 Polarizer

50 Liquid crystal display

60 Lamp insertion device

71 Pre-ordered train

BEST MODE FOR CARRYING OUT THE INVENTION

[Embodiment 1]

An embodiment of the present invention will be described below with reference to FIG. 1 and FIG. In this embodiment, a cold cathode ray tube (CCFT: Cold Cathode Fluorescent Tube, CFL: old and athode Fluorescent Lamp) will be described. Can be used not only for cold cathode ray tubes but also for hot cathode ray tube (HCFT).

[0034] Here, the cold cathode ray tube refers to a type of fluorescent lamp whose discharge electrode portion is not a filament. The cold cathode ray tube has a slightly lower luminance than the hot cathode tube because a large current cannot flow. However, the tube diameter can be reduced and the life is long.

[0035] On the other hand, a hot cathode ray tube is a fluorescent lamp in which a discharge electrode portion is made of a filament heated by an electric current. A hot cathode ray tube consumes a lot of power, but high brightness can be obtained at a relatively low voltage.

A cold cathode ray tube (CCFT: Cold Cathode Fluorescent Tube) 10 as a cathode ray tube of the present embodiment is a bottomed cylindrical external fitting fitted to each end of a glass tube 1 as shown in FIG. Each terminal 2 is provided. The lead-in wire 4 connected to each internal electrode 3 in the glass tube 1 is welded at the welded portion 5 at the passing point of the hole 2b formed in the bottom 2a of the external terminal 2.

[0037] The bottomed cylindrical external terminal 2 has a thickness of, for example, 0.2 to 0.5 mm, and a cylindrical length of, for example, 5 to 20 mm. The material also has, for example, brass or phosphor bronze strength.

[0038] The internal electrode 3 is disposed inside the glass tube 1, for example, within the cylindrical length of the external terminal 2. Is provided. Therefore, the inside of the glass tube 1 is a light emitting part rather than the cylindrical length of the external terminal 2.

[0039] Welding at the welded portion 5 in the hole 2b for connecting the lead-in wire 4 to the external terminal 2 is performed by, for example, solder or silver iron.

[0040] As shown in Fig. 2, the cold cathode ray tube 10 is supported by a conductive socket 21 having a clamping portion 21a for clamping and supporting the cylindrical portion of the external terminal 2. . Therefore, for example, in the knock light unit main body 20 as the illuminating device main body used in the liquid crystal display device, as shown in FIG. 3, a plurality of sockets 21 are arranged side by side, and the end of the cold cathode ray tube 10 is arranged. The external terminals 2 are electrically connected by being inserted into the holding portions 21a of the socket 21, respectively.

By the way, when the external terminal 2 of the cold cathode ray tube 10 is inserted into the holding portion 21a of the socket 21, the conventional cold cathode ray tube 10 has a space portion between the glass tube 1 and the external terminal 2. Existed. For this reason, the external terminal 2 may be recessed due to stress during insertion or the like, and the electrical connection between the external terminal 2 and the socket 21 may be impaired.

In order to solve this problem, in the cold cathode ray tube 10 of the present embodiment, as shown in FIG. 1, a filler is provided in the space between the bottomed cylindrical external terminal 2 and the glass tube 1. 6 is enclosed. As a result, the space between the external terminal 2 and the glass tube 1 becomes solid, and even if the cold cathode ray tube 10 is inserted into the holding portion 21a of the socket 21, the external terminal 2 will not be recessed.

[0043] As the filler 6, for example, a thermosetting resin, a molten metal, or an inorganic filler can be used. As the thermosetting resin, for example, epoxy resin, phenol resin, epoxy resin, melamine resin, urea resin, unsaturated polyester, or alkyd resin is preferable. This thermosetting resin is a resin that undergoes polymerization to form a polymer network structure when heated, and does not return to its original state after curing. In use, it is common to form a relatively low molecular weight resin having fluidity into a predetermined shape, and then react and cure by heating or the like. There are also thermosetting resins such as epoxy resins that use a mixture of Liquid A (base) and Liquid B (curing agent) in an adhesive or putty. In this epoxy resin, a polymerization reaction occurs by mixing. Thermosetting resin is hard and resistant to heat and solvents, so it is used for surface treatment of electrical parts and tables, baking paint, etc. Used.

[0044] The molten metal is preferably solder or silver. Furthermore, as the inorganic filler, for example, inorganic silica, calcium carbonate, or talc (talc) is preferable. Inorganic fillers (fillers) such as calcium carbonate and talc have excellent properties in terms of rigidity and heat resistance compared to single resin, so they can be molded in various fields such as automobile parts and home appliance parts. It is used for various purposes such as products, sheets and films.

Here, a manufacturing method of the cold cathode ray tube 10 having the above-described configuration will be described based on FIGS. 4 (a) to (c) and FIGS. 5 (a) to (e). 4 (a) to 4 (c) are perspective views showing the manufacturing process of the cold cathode ray tube 10, and FIGS. 5 (a) to 5 (e) are cross-sectional views showing the manufacturing process of the cold cathode ray tube 10. FIG.

That is, when manufacturing the cold cathode ray tube 10, basically, as shown in FIGS. 4 (a) to 4 (c), a bottomed cylindrical external terminal 2 is externally fitted to the glass tube 1, Welding using solder iron at the welded portion 5 outside the passing point with the hole 2b formed in the bottom 2a of the external terminal 2 in the lead-in wire 4, and further, It goes through a process of cutting the protruding part.

More specifically, first, as shown in FIG. 5 (a), the lead-in wire 4 connected to the internal electrode 3 protrudes into the glass tube 1 protruding from the end force of the glass tube 1, and has a bottomed cylindrical shape. Move external terminal 2 closer. Next, as shown in FIG. 5B, a filler 6 is applied to the inside of the bottomed cylindrical external terminal 2. Next, as shown in FIG. 5 (c), the external terminal 2 is inserted into the glass tube 1 through the lead wire 4 through the hole 2 b of the external terminal 2 coated with the filler 6 on the inside. Thereby, the filler 6 is filled in the entire space between the glass tube 1 and the external terminal 2. At this time, it is not always necessary to fill the entire space with the filler 6. For example, a space may remain in the vicinity of the hole 2b of the external terminal 2. In other words, it is sufficient that the external terminal 2 is filled to such an extent that it is not recessed by an external force.

[0048] After that, as shown in Fig. 5 (d), the outside of the hole 2b is welded with solder or silver solder. As a result, the lead-in wire 4 and the external terminal 2 are electrically connected. Next, as shown in FIG. 5 (e), the extra lead-in wire 4 outside the welded portion 5 made of solder or silver iron is cut. Thereby, the cold cathode ray tube 10 is completed.

[0049] In the cold cathode ray tube 10, the filler 6 is provided in the entire space between the glass tube 1 and the external terminal 2. It is true and has become a medium offering. So this? ^ »§10 socket 21

(The outer side 2 does not dent even if it is inserted into the ¾¾ ^ 21 a.

[0050] where

Based on the example of Fig. 10, the explanation is based on Fig. 6 (a) to (e), "0¾. Fig. 6 (a) to (e) shows the other manufacturing steps of the cold | It is a ¾ffffi diagram.

[0051] In this t¾¾, first, as shown in Fig. 6 (a), the bottomed cylindrical shape <«» 2 j¾¾

When a hole is provided in 2a, the center of this CT2a protrudes from the inside, thereby creating a pointed hole 2c ^ F ^. After that, it goes through the same steps as | ΐϊ | ΞΙ 5 (b) to (e) as shown in Fig. 6 (b) to (e) i ^ r.

[0052] In this tSt ^ ~ method, the hole 2c of JS¾2a in the bottomed cylindrical outer ¾ί¾ΐ · 2 is formed to project from the inside in a pointed shape, so that ¾ «¾" 6 is The hole 2c force ¾ 才 ¾Ι Also, even if ¾¾year 6 falls out of the hole 2c, it does not spread to the outer area of the outer Mi 2. Therefore, the guide in ¾ »5 When doing sickle between Λ ^ 4 and outer ¾ »2, solder ^ is not disturbed by the protrusion of ¾¾¾ · 6.

[0053] Next, another example of the final pipe 10 is described with reference to FIGS. 7 (a) to (e). Fig. 7 (a) to (e)

FIG. 6 is a plan view of still another process of 0.

[0054] In this it ^ ¾, as shown in Fig. 7 (b), the position where ¾t new 6 is applied is not applied to the inner side of outer ÷÷ 2, but to the outlet 1a of the introduction wire 4 in the glass tube 1. Point power S is different. After that, it goes through the same process as Ι | Ξϋΐ5 (c) to (e) as shown in Fig. 7 (c) to (e).

[0055] In this SSt ^ method, ¾¾ year force is used as the lead-out port 1a of the guide Λ ^ 4 in the glass tube 1, so at least the lead-out port 1a in the glass tube 1 is ¾WW6 Power 9Et is true. Therefore, even if the glass tube 1, the outer Wf2, and <7) ¾ are not positive, the gas in the glass tube 1 does not slow leak from the outlet 1a.

[0056] Next, 1

In addition, the other $ examples will be explained based on Fig. 8 (a) to (e). Figures 8 (a) to 8 (e) are views of another iSglM in the ^ «¾ 镍 tube 10.

Corrected § paper (Rule 91) [0057] As shown in Figs. 8 (a) to (e), this manufacturing method is applied to the external terminal 2 having the hole 2c formed in the protruding state in the inner force of Figs. 6 (a) to (e). 7 (a) to (e), the method of applying the filler 6 to the take-out port la as the take-out portion of the lead-in wire 4 in one glass tube is applied.

[0058] In this manufacturing method, since the filler 6 is applied to the takeout port la of the introduction line 4 in the glass tube 1, at least the takeout port la of the introduction line 4 in the glass tube 1 is surely filled. Material 6 is filled. Therefore, even if the adhesion between the glass tube 1 and the external terminal 2 is insufficient, the gas in the glass tube 1 will not leak slowly from the outlet port la. In addition, since the hole 2c of the bottom 2a of the bottomed cylindrical external terminal 2 is formed so as to protrude from the inside, the filler 6 hardly leaks from the hole 2c. Accordingly, the filler 6 reliably fills the take-out port la and enters between the glass tube 1 and the cylindrical portion of the external terminal 2.

[0059] As a result, it is possible to prevent a slow leak from the take-out port la and to securely bond the glass tube 1 and the cylindrical portion of the external terminal 2. Therefore, if the cylindrical portion of the external terminal 2 is easily detached from the glass tube 1, it will not be lost.

As described above, in the cold cathode ray tube 10 and the manufacturing method thereof according to the present embodiment, the filler 6 is enclosed in the space between the bottomed cylindrical external terminal 2 and the glass tube 1. For this reason, if the external terminal 2 is recessed due to stress applied to the socket 21 holding the external terminal 2 or during other assembly, etc.

Accordingly, it is possible to provide a cold cathode ray tube 10 that can prevent poor fitting and disconnection due to the recess of the bottomed cylindrical external terminal 2, and a method of manufacturing the same.

[0062] Further, in the cold cathode ray tube 10 and the manufacturing method thereof according to the present embodiment, the hole 2b formed in the bottom 2a of the external terminal 2 is formed to project outwardly in a tip shape. Preferably it is.

[0063] This makes it difficult for the filler 6 to leak from the hole 2c. Further, even if the filler 6 leaks from the hole 2b, it does not spread around the outside of the external terminal 2. Therefore, when welding between the lead-in wire 4 and the external terminal 2, if the welding material is disturbed by the protrusion of the filler 6, V is indestructible, so that welding can be performed easily. [0064] Further, in the cold cathode ray tube 10 and the manufacturing method thereof according to the present embodiment, the filler 6 preferably includes a thermosetting resin, a molten metal, or an inorganic filler.

As a result, the filler 6 can be reliably sealed in the space between the bottomed cylindrical external terminal 2 and the glass tube 1.

[0066] Further, in the method of manufacturing the cold cathode ray tube 10 of the present embodiment, the filler 6 is applied to the inside of the cylindrical portion of the bottomed cylindrical external terminal 2, and then the external terminal 2 is fitted into the glass tube 1. It is preferable to wear it.

Thereby, the filler 6 is filled in the entire space between the glass tube 1 and the external terminal 2.

In particular, the cylindrical portion of the external terminal 2 and the glass tube 1 can be securely adhered.

In addition, in the manufacturing method of the cold cathode ray tube 10 of the present embodiment, the filler 6 is applied to the outlet port la of the introduction wire 4 in the glass tube 1, and then the external terminal 2 is fitted to the glass tube 1. It is preferable.

[0069] Thereby, the filler 6 is filled in the entire space between the glass tube 1 and the external terminal 2.

In particular, the outlet la of the lead-in wire 4 in the glass tube 1 is securely sealed. For this reason, even if stress is applied to the lead-in wire 4, the close-up of the lead-out port la of the lead-in wire 4 is reliable, so that gas in the glass tube 1 leaks from the lead-out port la of the lead-in wire 4. Can be prevented.

[Embodiment 2]

The following will describe another embodiment of the present invention with reference to FIGS. Configurations other than those described in the present embodiment are the same as those in the first embodiment. For convenience of explanation, members having the same functions as those shown in the drawings of Embodiment 1 are given the same reference numerals, and explanations thereof are omitted.

In the present embodiment, a knock light of a liquid crystal display device including the cold cathode ray tube 10 described in the first embodiment will be described.

First, problems of the conventional backlight will be described with reference to FIG. FIG. 21 is a cross-sectional view showing a configuration of a conventional backlight 200. As shown in FIG. [0073] As shown in Fig. 21, in the conventional backlight 200, a lamp with a harness was used, and the electrical connection of the lamp was attached to the back of the backlight base by passing the harness through the backlight base. It was necessary to connect to the connector 221 on the circuit board 222.

That is, electrical connection is made from the cold cathode ray tube 201 to the circuit board 222 on the back surface of the backlight angle 231 through the harness 220 with a connector as a lead wire. As a result, it had the following problems.

(1) The harness 220 with connector is made of flexible wiring, so the assembly shape is not fixed and unstable. In other words, as shown in Fig. 22, the lamp with harness with lead wires, whose shape was not stable, was hung and the direction was not fixed, and it was difficult to install the lamp in the backlight base.

(2) In order to connect the harness 220 with connector connected to the lead-in wire 214 to the circuit board 222, it is necessary to pass through the narrow hole 231a of the backlight angle 231. Therefore, the harness with connector to this hole 23 la Insertion of 220 and attachment work of the harness with connector 220 to the circuit board 222 become a bottleneck in promoting mechanization.

(3) When attaching the harness 220 with a connector to the circuit board 222, it is necessary to invert the knocklight 200 because it is a work straddling both sides. That is, the cold cathode ray tube 201 is connected to the lead-in wire 214 from the front side of the knocklight 200, while the harness 220 with connector is attached to the circuit board 222, so that the knocklight 200 is attached to the backside of the knocklight 200. It was necessary to reverse the kwright 200.

(4) Since the harness with connector 220 is composed of the lead wire and the connector 221, it is expensive as a lamp member.

In the present embodiment, the above-described problem is solved by using the cold cathode ray tube 10 of the first embodiment.

That is, the liquid crystal display device 50 according to the present embodiment includes a backlight unit 30 as an illumination device and a liquid crystal display panel unit 40 as shown in FIG.

The backlight unit 30 includes the backlight unit main body 20 shown in FIG. 3 such that the cold cathode ray tubes 10 are arranged side by side and attached to the socket 21 as shown in FIG. ing.

As shown in FIG. 10, the backlight unit 30 has the cold cathode ray tube 10 attached to the upper side force of the backlight base 31 as a base substrate. On the other hand, a circuit board 32 is provided below the knocklight base 31, and the socket 21 is erected from the circuit board 32 through an opening 31 a of the backlight base 31. A lamp folder 33 is provided above the socket 21.

[0079] The reason why such a structure can be assembled is that the electrical connection between the external terminal 2 and the socket 21 that is recessed in the external terminal 2 of the cold cathode ray tube 10 is stabilized.

[0080] The opening 31a of the knocklight base 31 is a margin for allowing the socket 21 to pass therethrough, and there is also a gap between the backlight base 31 and the circuit board 32. Therefore, foreign matter such as dust may enter the light emitting space 30a of the backlight unit 30 through these gaps. Therefore, in the present embodiment, in the opening 31a of the knock base 31, the backlight base 31 is formed in a cylindrical shape and is formed into a cylindrical portion 31b that extends to a height that contacts the circuit board 32. The structure prevents dust from entering. The illumination device of the present invention is not limited to the backlight unit 30 using the cold cathode ray tube 10 of the present structure, and may not necessarily be bottomed as long as it has a cylindrical electrode!

A method for manufacturing the liquid crystal display device 50 having the above-described configuration will be described with reference to FIGS.

First, as shown in FIG. 11, the socket 21 is erected on the circuit board 32. Next, as shown in FIG. 12, the socket 21 standing on the circuit board 32 is passed through the opening 31a of the backlight base 31 with a lower force. At this time, the circuit board 32 is fixed to the lower side of the backlight base 31. Next, as shown in FIG. 13, the cold cathode ray tubes 10 are respectively attached to the sockets 21 protruding from the knocklight base 31, and the light guide plate 35, the lens sheet 36, and the diffusion sheet 37 are attached to the upper side thereof. Thereby, the backlight unit 30 is completed.

Next, a liquid crystal display (LCD) panel 42 in which polarizing plates 41 and 43 are bonded together is stacked on the upper side of the backlight unit 30. Thereby, the liquid crystal display device 50 is completed.

As described above, the backlight unit 30 of the liquid crystal display device 50 of the present embodiment and the manufacture thereof. In the manufacturing method, when the knock unit 30 is manufactured, first, the socket 21 is erected on the circuit board 32, and then the socket 21 erected on the circuit board 32 is connected to the backlight base 31 of the backlight unit body 20. Pass through the opening 31a. Then, the circuit board 32 is attached to the back surface of the backlight base 31 in the backlight unit body 20. Thereafter, the cold cathode ray tube 10 is attached to the socket 21.

As a result, the mounting structure of the cold cathode ray tube 10 of the knock light unit 30 is simplified, so that in the assembly process, the surface force of the backlight base 31 of the backlight unit main body 20 has connectors and leads on the back surface. The detailed work of passing the wires is not necessary, and at the same time, it is not necessary to reverse the backlight unit body 20 to connect the connectors, and the number of assembly steps can be reduced.

In addition, the liquid crystal display device 50 of the present embodiment includes the backlight unit 30 described above. Therefore, it is possible to provide the liquid crystal display device 50 including the backlight unit 30 using the cold cathode ray tube 10 that can prevent the fitting failure and disconnection due to the recess of the bottomed cylindrical external terminal 2.

[Embodiment 3]

The following will describe another embodiment of the present invention with reference to FIGS. Configurations other than those described in the present embodiment are the same as those in the first embodiment and the second embodiment. For convenience of explanation, members having the same functions as those shown in the drawings of Embodiment 1 and Embodiment 2 are given the same reference numerals, and explanation thereof is omitted.

In this embodiment, another method for manufacturing the backlight of the liquid crystal display device including the cold cathode ray tube 10 described in the second embodiment will be described.

First, as shown in FIG. 23, there has conventionally been a harnessless lamp having a bottomed cylindrical external terminal structure such as CCFL and EEFL.

[0090] For example, since the EEFL is driven in parallel, only the lamp socket 302 having a shape connected to the inside of the backlight base 331 is arranged as shown in FIGS. The lamp socket end 302a is connected to the circuit board 322 on the back of the backlight base. [0091] Since the EEFL is a harnessless lamp, it has been conventionally possible to insert or replace the backlight base 331 from the surface direction. However, in order to separate the components at the time of disposal, it was necessary to remove the lamps 301 one by one in addition to the work of removing the circuit board 322.

Therefore, in this embodiment, even CCFL can be completed by work only from the surface direction of the lamp built-in and exchangeable backlight base, and the material separation at the time of disposal is also on the back side of the knock light base. By removing the laminated circuit board, the backlight base and the lamp can be easily separated.

That is, in the present embodiment, as shown in FIGS. 14 (a) to 14 (c), the backlight unit 30 includes a circuit board 32 including a plurality of lamp sockets 21 and the plurality of the above-described plurality of lamp sockets 21. And a backlight base 31 having openings 3 la as a plurality of through holes through which each of the lamp sockets 21 passes. The backlight base 31 and the circuit board 32 including the plurality of lamp sockets 21 are stacked in a state where the lamp socket 21 of the circuit board 32 is penetrated through the plurality of openings 31a of the backlight base 31. Has been. Also, a cylindrical outer terminal 2 with a bottom in the cold cathode ray tube 10 is inserted into the lamp socket 21.

Here, in the present embodiment, the cold cathode ray tube 10 is inserted by hand while aiming at the lamp socket 21 or by the lamp insertion device 60 as a lighting device manufacturing apparatus. Insert.

As shown in FIG. 15, the lamp insertion device 60 includes an adsorption chuck 61 as an adsorption means for collectively adsorbing the cold cathode ray tubes 10 preliminarily arranged on the prearrangement tray according to the actual lamp pitch, Each of the plurality of cold cathode ray tubes 10 is provided with a moving device 65 as a moving means for moving the cold cathode ray tube 10 to the upper side of the backlight base 31 in a state where the cold cathode ray tubes 10 are collectively adsorbed. Insert terminal 2 into the lamp socket 21 in the backlight base 31.

[0096] A method of manufacturing the cold cathode ray tube 10 using the lamp insertion device 60 will be described with reference to Figs.

First, as shown in FIGS. 16 and 17, as a step of performing pre-arrangement in advance according to the actual lamp pitch, a pre-arrangement tray 71 in which the cold cathode ray tube 10 is adjusted in accordance with the actual lamp pitch is prepared. Keep aligned. Next, as shown in FIG. 16 and FIG. The insertion device 60 moves from a predetermined fixed position to above the pre-arranged tray 71, descends vertically, and holds the cold cathode ray tube 10 as it is. Further, as shown in FIG. 16 and FIG. 19, the cold cathode ray tube 10 sucked together is inserted into the lamp socket 21 in the backlight base 31. At the time of insertion, the electromagnetic valve 63 of the lamp insertion device 60 is operated, and the suction of the suction chuck 61 through the sponge 62 of the cold cathode ray tube 10 by the suction chuck 61 is forcibly released by the discharge air. Thereafter, the lamp insertion device 60 moves upward above the backlight base 31 again and returns to a predetermined fixed position. Thereby, the batch insertion of the cold cathode ray tube 10 is completed.

On the other hand, when separating and collecting at the time of disposal, it is necessary to remove the grease such as the cold cathode ray tube 10 and the lamp socket 21 from the backlight base 31. At this time, in the present embodiment, the lamp socket 21 on the circuit board 32 cannot hold the cold cathode ray tube 10 by removing the circuit board 32 on the back of the knock light base 31. The lamp socket 21 comes off, and the lamp socket 21 as well as the cold cathode tube 10 itself can be removed from the knocklight base 31 in an instant! /.

[0099] For this reason, it is not necessary to remove the cold cathode ray tubes 10 one by one. As a result, the working efficiency of extracting the cold cathode ray tube 10 is improved.

[0100] It should be noted that the present invention is not limited to the above-described embodiments, and various modifications can be made within the scope shown in the claims, and the technical means disclosed in the different embodiments can be appropriately used. Embodiments obtained by combining are also included in the technical scope of the present invention.

Industrial applicability

[0101] The present invention relates to a cathode ray tube such as a cold cathode ray tube or a hot cathode ray tube having an internal electrode, a method for producing the cathode ray tube, an illumination device such as a backlight unit using the cathode ray tube, a method for producing the illumination device, It can be applied to an illumination device manufacturing apparatus and a liquid crystal display device.

Claims

The scope of the claims

[1] With a bottomed cylindrical external terminal fitted to each end of the glass tube,

The lead-in wire connected to each internal electrode in the glass tube is welded to the outside of the hole formed in the bottom of the external terminal.

A cathode ray tube, wherein a filler is enclosed in a space between the bottomed cylindrical external terminal and the glass tube.

2. The cathode ray tube according to claim 1, wherein the hole portion formed in the bottom portion of the external terminal is formed to protrude outwardly in a tip shape.

[3] The cathode ray tube according to claim 1, wherein the filler is a thermosetting resin, a molten metal, or an inorganic filler.

[4] A bottomed cylindrical external terminal fitted to each end of the glass tube is provided respectively.

The lead wires connected to the respective internal electrodes in the glass tube are welded to the outside of the holes formed in the bottom of the external terminal, respectively. According to the manufacturing method of the cathode ray tube, the bottomed A cathode ray tube manufacturing method, wherein a filler is enclosed in a space between a cylindrical external terminal and a glass tube.

5. The method of manufacturing a cathode ray tube according to claim 4, wherein the hole formed at the bottom of the external terminal is formed so as to protrude outwardly with a pointed tip. Law.

6. The method for producing a cathode ray tube according to claim 4, wherein a thermosetting resin, a molten metal, or an inorganic filler is used as the filler.

7. The method of manufacturing a cathode ray tube according to claim 4, wherein after the filler is applied to the inside of the cylindrical portion of the bottomed cylindrical external terminal, the external terminal is fitted to the glass tube.

8. The method of manufacturing a cathode ray tube according to claim 4, wherein after the filler is applied to the lead-out portion of the glass tube, the external terminal is fitted into the glass tube.

[9] An illumination device using the cathode ray tube according to claim 1,

A circuit board provided under the base substrate of the lighting device body,

The circuit board passing through an opening provided in the base board of the lighting device body And a socket for electrically connecting the cathode ray tube and the circuit board for controlling the lighting of the cathode ray tube by supporting an external terminal of the cathode ray tube. A lighting device.

[10] An illumination device using a plurality of cathode ray tubes according to claim 1,

A circuit board with a plurality of lamp sockets;

A backlight base provided with a plurality of through holes for penetrating each of the plurality of lamp sockets,

The backlight base and the circuit board having the plurality of lamp sockets are stacked in a state where the lamp socket of the board is penetrated through the plurality of through holes of the backlight base,

An illumination device, wherein a bottomed cylindrical external terminal of the cathode ray tube is inserted into the lamp socket.

[11] A liquid crystal display device comprising the illumination device according to claim 9 or 10 as a backlight.

[12] The method of manufacturing the lighting device according to claim 9,

Erecting the socket on the circuit board;

Passing the socket erected on the circuit board through the opening provided on the base substrate of the lighting device body, and attaching the circuit board to the back surface of the base substrate of the lighting device body;

And a step of attaching a cathode ray tube to the socket.

[13] The method of manufacturing the lighting device according to claim 10,

Pre-arranging the cathode ray tubes on the pre-arranged tray according to the actual lamp pitch in advance;

A step of collectively adsorbing the cathode ray tubes existing in the pre-arranged tray;

And a step of inserting a bottomed cylindrical external terminal in the plurality of cathode-ray tubes adsorbed together into a lamp socket in the backlight base. An apparatus for manufacturing a lighting device according to claim 10,

Adsorption means for collectively adsorbing cathode ray tubes pre-arranged on a pre-arrangement tray in advance according to the actual lamp pitch;

Moving means for moving the cathode ray tube to above the backlight base in a state where the cathode ray tubes are collectively sucked;

An apparatus for manufacturing a lighting device, comprising: an insertion means for inserting each bottomed cylindrical external terminal of the plurality of cathode ray tubes into a lamp socket in the backlight base.