JP2001043715A - Planar lighting system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate assembly of a device and replacement of a cathode-ray tube by providing a lamp holder, having a pressure contact part for feeding high voltage to a Dumet wire which extends from an electrode of the cathode ray tube and a holding part for holding the cathode-ray tube and made of an electrical insulating material on a light source part. SOLUTION: A rectangular hole for storing a pressure contact part 5 and a holding part 6 for holding a cathode-ray tube 3 are provided on a lamp holder 4, a hole through which a lead wire 10 is to be inserted from the lamp holder 4 is provided, an opening part is provided between the pressure contact part 5 and the holding part 6, and a Dumet wire is pressure-inserted in the pressure contact part 5 simultaneously with the installation of the cathode-ray tube 3. The pressure contact part 5 is made of a conductive and elastic metallic material, a V-shaped groove cutout part is provided on one piece of the upper part, a longitudinal groove cutout part having a diameter smaller than that of the Dumet wire is provided on the bottom part of the cutout part, and the Dumet wire extending from the cathode-ray tube 3 is pressed down to and brought into contact with the longitudinal groove cutout part. Accordingly, high voltage is supplied to the cathode-ray tube 3.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flat illuminator used for a liquid crystal display device or the like, and has a lamp holder for fixing a cold cathode tube and a jimet wire extending from an electrode of the cold cathode tube. The present invention relates to a flat lighting device capable of stably fixing a position of a tube and a jimet wire and facilitating attachment and replacement of a cold cathode tube.

[0002]

2. Description of the Related Art In a conventional flat lighting device, when power is supplied to a cold-cathode tube, a heat-resistant coated electric wire is directly connected to a dimming wire extending from electrodes at both ends of the cold-cathode tube by soldering or the like, or a minute thin ring is connected to the dimming wire. It is known to connect a heat-resistant covered electric wire by soldering or the like after crimping or bending the end of the jimet wire.

As a conventional flat lighting device, there is known a method of fixing a light source having a base in a clip shape having a spring property as disclosed in, for example, JP-A-5-100224. Further, as shown in, for example, Japanese Patent Application Laid-Open No. 6-51293, a method is known in which a light source and a lead wire for supplying light source power are integrally held on a reflector that is detachable from a light guide plate by a slide mechanism.

[0004]

In a conventional flat lighting device, when power is supplied to a cold cathode tube, a heat-resistant coated electric wire is directly connected to a dimmed wire extending from electrodes at both ends of the cold cathode tube by soldering or the like. When crimping or bending the end of the gimmet wire through a micro thin ring through the wire and connecting the heat-resistant covered wire with solder, etc., use it for the stress on the heat-resistant covered wire or jimmet wire at the soldering part, and use it for solder or solder There is a problem such as deterioration due to flux or the like. In addition, since it is directly connected to the jimet wire with the heat-resistant covered wire, workability such as routing of the heat-resistant covered wire and insulation bushing treatment of the jimet wire and soldered parts, etc., when assembling flat lighting equipment and replacing cold cathode tubes, etc. There is a problem.

In a conventional flat lighting device, for example, as disclosed in Japanese Patent Application Laid-Open No. Hei 5-100224, a method of fixing a light source having a base portion in a clip shape having a spring property involves manufacturing a cold cathode tube. If all manufacturers do not unify with the same standard, a wide variety of clip shapes must be manufactured,
There is a problem that even a single manufacturer needs a clip shape that matches the outer shape of the cold cathode tube.

Further, as disclosed in, for example, Japanese Patent Application Laid-Open No. 6-51293, a method of integrally holding a light source and a lead wire for supplying light source power to a reflector that is detachable from a light guide plate by a slide mechanism is known. Although effective against stress on the supply lead wire, there is a problem in economics when replacing the cold cathode tube.

SUMMARY OF THE INVENTION The present invention has been made to solve such a problem, and an object of the present invention is to directly connect a dimet wire extending from an electrode of a cold-cathode tube to a press contact portion made of a metal material provided with a vertical groove notch. Insert and press-contact to supply high voltage,
A lamp holder that holds the cold-cathode tube itself in a holding part made of an electrically insulating material makes it easy to assemble flat lighting devices and replace cold-cathode tubes, regardless of the size of the cold-cathode tube, and to connect them with solder etc. An object of the present invention is to provide a flat lighting device capable of preventing a lead wire, a Zimmet wire, or the like from being subjected to stress and deterioration due to solder or the like.

[0008]

According to a first aspect of the present invention, there is provided a flat illuminating apparatus, comprising: a light-contact portion for supplying a high voltage to a dimet wire extending from an electrode of a cold cathode tube; A lamp holder made of an electrically insulating material having a holding portion for holding a tube is provided.

According to a first aspect of the present invention, there is provided a flat illuminating device, comprising: a light-contact portion; a press-contact portion for supplying a high voltage to a jimet wire extending from an electrode of the cold-cathode tube; and a holding portion for holding the cold-cathode tube. Since it has a lamp holder made of material,
Regardless of the size of the cold-cathode tube, it can be easily performed when assembling the flat lighting device or replacing the cold-cathode tube, and at the same time, to prevent the lead wire and the jimet wire etc. due to the connection by solder etc. and to prevent the deterioration due to the solder etc. it can.

According to a second aspect of the present invention, in the flat lighting device, the pressing contact portion is formed of a rectangular conductive and elastic metal material, and a V-groove-shaped notch is formed in an upper piece. And a vertical groove notch portion having a diameter smaller than the diameter of the jimet wire, and a hole or a horn-shaped portion provided on one side.

According to a second aspect of the present invention, in the flat lighting device, the press contact portion is made of a rectangular metal material having conductivity and elasticity, and a V-groove-shaped notch is formed in an upper piece and a bottom portion of the V-groove-shaped notch. A press contact portion provided with a vertical groove notch portion smaller than the diameter of the jimet wire and a hole or a square portion on one side is made of a rectangular conductive and elastic metal material,
Since a groove-shaped notch, a vertical groove notch at the bottom of the V-groove notch and smaller than the diameter of the jimet wire, and a hole or a corner at one side are provided, the groove extends from the electrode of the cold-cathode tube. A high voltage can be supplied reliably and easily by directly inserting and press-contacting the jimet wire, and a lead wire supplying the high voltage can be connected to a hole or a corner on one side piece.

Further, the flat lighting device according to claim 3 is
The holding portion is made of an electrically insulating material having a bottom having a size corresponding to the electrode portion and a projecting portion having a width corresponding to the outer shape of the cold cathode tube.

According to the third aspect of the present invention, the holding portion is made of an electrically insulating material having a bottom portion having a size corresponding to the electrode portion and a projecting portion having a width corresponding to the outer shape of the cold cathode tube. Thus, the cold cathode tube itself can be held safely and reliably without impairing the emission of light from the cold cathode tube.

According to a fourth aspect of the present invention, in the flat lighting device, the lamp holder has a rectangular hole for accommodating the press contact portion, a lead hole is provided at a position corresponding to a side of the rectangular hole, and a V-groove is provided. An opening is provided between the notch side and the vertical groove notch side and the holding part, and a mounting hole is provided at the bottom.

According to a fourth aspect of the present invention, the lamp holder has a rectangular hole for accommodating the pressure contact portion in the lamp holder, a lead hole is provided at a position corresponding to a side of the rectangular hole, and a V-groove notch is provided. An opening is provided between the side and vertical groove notch side and the holding part, and a mounting hole is provided at the bottom, so that the press-fitting of the jimet wire can be performed simultaneously with the installation of the cold-cathode tube, and the pressure-contacting through the lamp holder safely. A high voltage can be supplied to the lamp holder, and the lamp holder can be easily fixed by the mounting hole at the bottom.

Further, the flat lighting device according to claim 5 is
The pressure contact portion is provided with a second angular portion below the rectangular side end of the pressure contact portion corresponding to the mounting hole at the bottom of the lamp holder.

According to a fifth aspect of the present invention, in the flat lighting device, the second contact portion is provided at the lower end of the rectangular contact portion corresponding to the mounting hole at the bottom of the lamp holder. The press contact portion can be fastened to the frame together or a high voltage can be supplied directly from the frame to the press contact portion.

Further, the flat illumination device according to claim 6 has a lamp holder that covers the rectangular hole and the holding portion, and has an arc-shaped projection corresponding to the outer shape of the cold cathode tube at a position corresponding to the holding portion. And it has a cover made of an electrically insulating material that fits into the rectangular hole and the holding portion.

According to a sixth aspect of the present invention, the lamp holder covers the lamp holder with the rectangular hole and the holder, and has arc-shaped projections corresponding to the outer shape of the cold cathode tube at positions corresponding to the holder. Since it has a cover made of an electrically insulating material that fits into the rectangular hole and the holding portion, it is possible to safely cover a portion to which high voltage is applied and securely fix the cold cathode tube.

[0020]

Embodiments of the present invention will be described below with reference to the accompanying drawings. The present invention provides an electrode for a cold-cathode tube by using a lamp holder having a rectangular metal material provided with a vertical groove notch or the like in a lamp holder made of an electrically insulating material and a lamp holder having a holding portion made of an electrically insulating material. The high-voltage is supplied by directly inserting and pressing the dimmed wire extending from the tube, and the cold-cathode tube itself is held, making it easy to assemble flat lighting equipment and replace the cold-cathode tube regardless of the size of the cold-cathode tube The present invention provides a flat lighting device capable of obtaining workability, economy, and reliability because it can prevent stress on lead wires and zimmet wires, etc. due to connection with solder and the like, and deterioration due to solder, etc. It is in.

FIG. 1 is a schematic exploded perspective view of the flat lighting device according to the present invention. FIG. 2 is an exploded view of the lamp holder, FIG. 3 is a partial view of a press contact portion, and FIG.
The figure of an application example is shown. The flat lighting device 1 shown in FIG.
It is composed of a light source 3, a lamp holder 4, a reflection sheet 8, a frame 9, and a lead wire 10.

The light guide plate 2 is formed of a transparent acrylic resin (PMMA) or polycarbonate (PC) having a refractive index of about 1.4 to 1.7, and has an incident end face 21 for guiding light from the light source 3; A reflection end face portion 22 located on the opposite side to the incident end face portion 21;
And a surface portion 2a for emitting light.
And a back surface portion 2b opposite to the front surface portion 2a.

The light source 3 is a cold cathode tube (Cold Cath)
(direct fluoresced lamp) and the like, and the direct light is transmitted from the incident end face 21 of the light guide plate 2 to the light guide plate 2.
The other light enters the light guide plate 2 through the space between the light source 3 and the inner surface of the frame 9 and the reflector while being reflected by the inner surface of the frame 9 and a reflector (not shown). Further, the cold cathode tube 3 of the light source has a shape such as a straight line, a U-shape, and an L-shape, and a jimet wire extends directly from the electrodes at both ends of the tube.

The lamp holder 4 comprises a lamp holder 4 main body made of an electrically insulating material and a cover 7, and has a rectangular hole 4a for accommodating a pressure contact portion 5 for supplying a high voltage, and a holding portion 6 for holding a cold cathode tube. And a hole 4b for passing the lead wire 10 from the lamp holder 4 is provided at a position corresponding to the side of the rectangular hole 4a, and an opening 4c is provided between the press contact portion 5 and the holding portion 6 to provide a cold cathode. At the same time as the installation of the pipe 3, the press-insertion of the jimet wire into the press-contact section 5 can be performed.

The lamp holder 4 is mounted on the frame 9 by providing a mounting hole (not shown) on the bottom. Further, the cover 7 made of the same electrically insulating material as the main body of the lamp holder 4 is fitted to the arc-shaped projection 7a and the rectangular hole 4a having a width corresponding to the outer shape of the cold cathode tube 3 at a position corresponding to the holding portion 6. The holding portion and the press contact portion 5
To hold the cold cathode tube 3 and electrically insulate it. The holding portion 6 has a bottom having a size corresponding to an electrode portion which is a region of the cold cathode tube 3 which does not emit light, and ensures that the light emission from the cold cathode tube 3 is not impaired. You can hold yourself.

The press contact portion 5 is made of a metal material or the like having conductivity and elasticity in a rectangular shape, and a V-groove notch 5
a, and a vertical groove notch 5b smaller than the diameter of the Gimette wire is provided at the bottom of the V-groove-shaped notch 5a.
Is extended down to the longitudinal groove notch 5b, and the elasticity of the material causes the flange and the longitudinal groove notch 5b to press against each other to supply a high voltage to the cold cathode tube 3.

The pressure contact portion 5 is provided with a hole or a corner portion 5c (not shown) in one side portion, and is connected to a lead wire 10 for guiding a high voltage from a high-voltage power generator (not shown). Further, as shown in FIG. 3A, the press contact portion 5 is provided with a second corner portion 5d below the rectangular side end, so that the second corner portion 5d makes pressure contact with the lamp holder 4. The part 5 and the frame 9 can be fastened together, and the high voltage from the high-voltage power generator can be applied to the frame 9 regardless of the lead wire.
The pressure can be directly supplied to the pressure contact portion by utilizing the above. FIG. 3B shows a case where a second angular portion 5d is provided below the side end of the press contact portion 5 with the rectangular shape facing downward.

The reflection sheet 8 is made of a thermoplastic resin such as polyethylene terephthalate or polycarbonate mixed with, for example, a white material such as titanium oxide, or a printed sheet or a thermoplastic resin sheet subjected to metal deposition such as aluminum. It is made of a metal foil bonded or laminated, a sheet-like metal, or the like, reflects light emitted from the back surface 2b of the light guide plate 2, makes the light incident on the light guide plate 2 again, and transmits all the light from the light source 3 to the surface of the light guide plate 2. The light is emitted from the portion 2a.

The frame 9 is made of polycarbonate resin (P
C), which is made of an electrically insulating material such as an ABS resin or a liquid crystal polymer resin, and accommodates the light guide plate 2, the light source 3, the reflection sheet 8 and the like. There are also things. Further, various wirings are taken into the frame 9 for simplification at the time of manufacturing. Although the lead wire 10 is shown in FIG.
The wiring may be directly performed on the second angular portion 5d from the above.

The lead wire 10 is made of a heat-resistant covered electric wire, a polytetrafluoroethylene covered electric wire or the like.
A high voltage is led by connecting to a not-shown hole or square portion 5c on one side of the pressure contact portion 5 inside.

FIG. 4 shows a case where the lamp holder 4 is provided with a plurality of press-contact portions 5, holding portions 6, and cold cathode tubes 3 for use in a large light guide plate such as a monitor. The large output light can be projected to the light guide plate by being attached to the inner side surface.

As described above, the flat lighting device of the present invention does not directly connect the lead wire to the cold-cathode tube for the light source, but directly press-contacts the dimet wire from the cold-cathode tube electrode to the electrically insulating lamp holder. A metal pressure contact part with a vertical groove notch is provided, and a high pressure voltage is supplied by directly inserting and pressing the zimet wire and holding the cold cathode tube itself, so it is flat regardless of the size of the cold cathode tube. A light source unit which can be easily performed at the time of assembling a lighting device or replacing a cold cathode tube, and which can prevent stress on a lead wire or a Zimmet wire or the like by connection with solder or the like and prevent deterioration due to solder or the like.

[0033]

As described above, in the flat lighting device according to the first aspect of the present invention, the light source section is a press contact portion for supplying a high voltage to the jimet wire extending from the electrode of the cold cathode tube, and the holding section for holding the cold cathode tube. Since it has a lamp holder made of an electrically insulating material having a portion, it can be easily performed at the time of assembling a flat illuminating device or replacing a cold cathode tube regardless of the size of the cold cathode tube, as well as connecting lead wires by soldering or the like. The workability, economy and reliability can be improved because it is possible to prevent the gymet wire and the like from being deteriorated by stress and solder.

According to a second aspect of the present invention, in the flat lighting device, the press contact portion is made of a rectangular metal material having conductivity and elasticity, and a V-groove-shaped notch is formed in an upper piece. A press contact portion provided with a vertical groove notch smaller than the diameter of the zimet wire at the bottom and a hole or a horn at one side is made of a rectangular metal material having conductivity and elasticity. A V-groove notch, a V-groove notch at the bottom of the V-groove notch, and a hole or a corner on one side of the V-groove notch. A high voltage can be reliably and easily supplied by directly inserting and press-contacting a gimette wire extending from the wire, and a lead wire supplying a high voltage can be connected to a hole or a corner portion on one side piece. Therefore, connection can be made without soldering etc. It can contribute to the improvement of sexual.

Further, the flat lighting device according to claim 3 is
Since the holding portion is made of an electrically insulating material having a bottom portion having a size corresponding to the electrode portion and a protruding portion having a width corresponding to the outer shape of the cold cathode tube, the emission of light from the cold cathode tube is not impaired. Since the cold-cathode tube itself can be held safely and securely, reliability can be improved against stress on the cold-cathode tube, external impact, and the like.

According to a fourth aspect of the present invention, there is provided the flat lighting device, wherein the lamp holder has a rectangular hole for accommodating the press contact portion, a lead hole is provided at a position corresponding to a side of the rectangular hole, and a V-groove is provided. Since an opening is provided between the notch side and the vertical groove notch side and the holding part, and a mounting hole is provided at the bottom, the press-fit insertion of the jimet wire can be performed simultaneously with the installation of the cold cathode tube, and the lamp can be safely inserted through the lamp holder. High voltage can be supplied to the pressure contact part,
Since the lamp holder can be easily fixed by the mounting hole on the bottom, it is easy to assemble and replace the cold-cathode tube, and also to prevent stress on jimet wire, etc., improving workability, economy and reliability. can do.

Further, the flat lighting device according to claim 5 is
Since the pressure contact portion is provided with a second angular portion below the rectangular side end of the pressure contact portion corresponding to the mounting hole at the bottom of the lamp holder, the lamp holder and the pressure contact portion are jointly fastened to the frame or directly from the frame. Since a high voltage can be supplied to the pressure contact portion, the lamp holder and the frame can be integrated, and workability, economy, and reliability can be improved.

Further, the flat illumination device according to claim 6 has a lamp holder covering the rectangular hole and the holding portion, and has an arc-shaped projection corresponding to the outer shape of the cold cathode tube at a position corresponding to the holding portion. And since it has a cover made of an electrically insulating material that fits into these rectangular holes and the holding part, it can safely cover the parts where high voltage is applied and can fix the cold-cathode tube securely, thus ensuring safety and reliability. Can be improved.

[Brief description of the drawings]

FIG. 1 is a schematic exploded perspective view of a flat lighting device according to the present invention.

FIG. 2 is an exploded view of a lamp holder according to the present invention.

FIG. 3 is a partial view of a press contact portion according to the present invention.

FIG. 4 is an application example diagram according to the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Planar illumination device, 2 ... Light guide plate, 2a ... Surface part, 2b ...
Back part, 3 ... Light source (cold cathode tube), 4 ... Lamp holder, 4
a: rectangular hole, 4b: lead wire through hole, 4c: opening, 5
···· Press-contact part, 5a ··· V-groove-shaped notch, 5b ··· Vertical-groove notch, 5c… Range-shaped part, 5d… Second corner-shaped part, 6… Holding part, 7
... Cover, 7a ... arc-shaped projection, 7b ... fitting projection, 8 ... reflection sheet, 9 ... frame, 10 ... lead wire.

Claims (6)

[Claims] A light source unit comprising a cold cathode tube or the like; a light guide plate having a surface portion provided with an incident end surface portion on at least one side surface near the light source, for guiding and emitting light from the light source; A flat lighting device comprising: a reflection sheet provided at a lower portion of a back surface portion located on an opposite side; a reflector that reflects light of the light source and makes the light incident on the incident end surface portion again; The part has a lamp holder made of an electrically insulating material having a pressure contact part for supplying a high voltage to a Dimet wire extending from an electrode of the cold cathode tube, and a holding part for holding the cold cathode tube. Flat lighting device. 2. The pressing contact portion is made of a rectangular conductive and elastic metal material, and has a V-groove-shaped notch at an upper portion thereof and a diameter of the jimet wire at a bottom of the V-groove-shaped notch. The flat illuminating device according to claim 1, wherein a smaller vertical groove cutout portion and a hole or a corner portion are provided in one side piece. 3. The holding portion is made of an electrically insulating material having a bottom having a size corresponding to the electrode portion and a projecting portion having a width corresponding to the outer shape of the cold cathode tube. The flat lighting device according to claim 1. 4. The lamp holder has a rectangular hole for accommodating the pressure contact portion, a lead hole is provided at a position corresponding to the side portion of the rectangular hole, and the V-groove-shaped notch side and the lamp hole are provided. The flat lighting device according to claim 1, wherein an opening is provided between the notch side of the vertical groove and the holding portion, and a mounting hole is provided in a bottom portion. 5. The pressure contact portion includes a second corner portion provided at a lower portion of the rectangular side end of the pressure contact portion corresponding to a mounting hole in a bottom portion of the lamp holder. 5. The flat lighting device according to claim 2, claim 3, and claim 4. 6. The lamp holder covers the rectangular hole and the holding portion, and has an arc-shaped protrusion corresponding to the outer shape of the cold cathode tube at a position corresponding to the holding portion. 5. The flat lighting device according to claim 1, further comprising a cover made of an electrically insulating material fitted to the shape hole and the holding portion.