JP2006253116A - Direct type backlight device and display device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a direct type backlight device and a display device using it preventing short-circuits of lead wires of the adjacent light-emitting tubes, preventing an occurrence of damage of the lead wires and ozone smell as well as improving workability and productivity with a simple configuration of an assembly structure of the light-emitting tube. <P>SOLUTION: The backlight device has a lamp holder 10 supporting a plurality of light-emitting tubes 9 and arranges the plurality of light-emitting tubes 9 on the rear face side of a liquid crystal panel 3 by the lamp holder 10. In the lamp holder 10, a plurality of holding parts 10b to position and hold end parts of the light-emitting tubes 9 at prescribed intervals are disposed in parallel, and rubber blocks 11 are disposed, wherein the blocks 11 separates, at prescribed intervals, lead wires 9a each extended from electrodes at the end pars of the adjacent light-emitting tubes 9 in a state to be mounted on the holding parts 10b between the adjacent holding parts 10b, 10b. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a direct backlight device and a display device using the direct backlight device, and in particular, irradiates with a plurality of arc tubes (for example, fluorescent tubes) from the back side of the display panel (for example, a liquid crystal panel). The present invention relates to a direct backlight device and a display device using the direct backlight device.

  2. Description of the Related Art Conventionally, in a liquid crystal display device, a direct type backlight device that is irradiated with a plurality of arc tubes from the back side of a liquid crystal panel is often employed.

  The direct type backlight device is generally configured such that a diffuser plate that diffuses light is disposed on the back surface of a liquid crystal panel, and a reflector plate in which a plurality of arc tubes are arranged in parallel is disposed behind the diffuser plate.

  Both ends of the arc tube are attached to the reflector by the arc tube support, and lead wires extending from the electrodes at both ends are connected to the arc tube driving power supply circuit.

  The arc tube drive power supply circuit is controlled according to the state of the liquid crystal display device. When the arc tube is turned on, the light emitted from the arc tube reaches the diffuser as direct light and reflected light by the reflector, and is diffused by the diffuser. By uniformly irradiating the back surface of the liquid crystal panel, an image having no luminance unevenness is displayed.

  However, connecting the lead wires to the arc tube driving power supply circuit is an individual operation for each arc tube, so there is a problem that it is difficult to arrange the arc tubes uniformly, and luminance unevenness due to poor placement of the arc tube is caused. It has been a conventional problem to eliminate the problem and improve workability.

  Therefore, as a countermeasure for such a problem, for example, the storage case of the arc tube and the base body provided with the reflection structure, the drive circuit board mounting structure, etc. are integrally configured, and the alignment between the reflection structure and the arc tube is easy. What has been proposed has been proposed (Patent Document 1).

With such a configuration, the arc tube can be easily and accurately assembled, so that it is possible to improve luminance unevenness and simplify the backlight structure even in a large liquid crystal display panel.
JP 2001-215497 A

  However, according to the above configuration, for example, in the case where the lead wire of the arc tube is drawn out from the side surface of the storage case in which the arc tube is positioned, the arc tube driving circuit (INV circuit) is provided on the back surface of the direct type backlight device. When there is a lead wire connected to it, a constant stress is generated in the connection part of the arc tube electrode and the lead wire due to the repulsive force caused by the bending of the lead wire. There arises a problem that the high-voltage AC voltage portion is exposed.

  Therefore, when an inverter circuit is provided on the back surface of the direct type backlight device, it is designed so that the lead wire of the arc tube is drawn out in a direction (particularly a vertical direction) having at least a certain angle with respect to the longitudinal direction of the arc tube. Is more preferable in terms of product reliability.

  Therefore, in recent years, in order to prevent the discharge due to the disconnection or the like of the connection portion between the electrode of the arc tube and the lead wire, in order to direct the lead-out direction of the lead wire in a certain direction, the mounting portion is prevented from rotating. There is known an arc tube assembly including a rubber holder that is mounted on a direct type backlight device so that the lead-out direction can be easily guided to the back surface.

Further, for simplification of the component structure, as shown in FIGS. 13, 14 and 15, the arc tubes arranged adjacent to each other inside the direct type backlight device are combined with a set of arc tube assemblies (for example, What was comprised as 2 sets of 1) is known.
Reference numeral 321 is an inverter circuit board, 322 is an inverter transformer, 309 is an arc tube, 309a is a lead wire, 309b is a connector, and 309c is a rubber holder.

  However, in such a system, since the rubber holder is attached to the arc tube at each connection portion, there is a problem that the assembling work of the arc tube is troublesome and workability and productivity are lowered.

  Therefore, in order to fix each of the electrodes (two or more) on the same side of the adjacent arc tube, each arc tube was inserted and connected from this notch using an integrally molded rubber holder having a notch shape. A method of connecting two or more lead wires together to the high voltage output terminal of the INV circuit provided on the back of the display device is conceivable. However, since the arc tube is cylindrical, careless about the longitudinal axis of the arc tube This causes a problem that the lead-out direction of the lead wire is not stable.

  As a result, a short circuit between the lead wires is likely to occur due to contact of the lead wires to which a high-voltage AC voltage is applied, and this may cause damage to the lead wires or generation of ozone odor.

  In particular, when a high-voltage alternating voltage having an opposite phase is applied to the lead wires of adjacent arc tubes, the potential difference between the lead wires is likely to be the largest, so that the discharge is easy.

  The present invention has been made in view of the above-described conventional problems. The arc tube assembly structure has a simple configuration to improve workability and productivity, and the lead wires of adjacent arc tubes can be improved. It is an object of the present invention to provide a direct backlight device that prevents a short circuit and prevents damage to the lead wires and generation of ozone odor, and a display device using the direct backlight device.

  In the direct type backlight device according to the present invention, the arc tube is disposed on the back side of the display panel by an arc tube support that supports a plurality of arc tubes in which wires are extended from electrodes provided at the end. In the direct-type backlight device, the arc tube support is provided with a plurality of holding portions for positioning and holding the end portions of the arc tube at predetermined intervals, and adjacent arc tube mounted in the holding portion. A wire separating member for separating the wires is provided.

  In the present invention, a plurality of holding portions for positioning and holding the end portions of the arc tube at predetermined intervals are arranged in parallel on the arc tube support that supports the plurality of arc tubes, and are attached to the respective holding portions. A wire member separating member is provided for separating the wire members of adjacent arc tubes in the same state. This makes it possible to easily fix the positioning of the arc tube electrode portions at a plurality of locations in a state where the adjacent arc tube wires are separated by an appropriate length, so that stable optical characteristics, that is, the direct-type backlight device The luminance distribution and local luminance unevenness can be controlled.

  A direct type backlight device according to the present invention includes an arc tube holding member having a holder portion that holds a plurality of arc tubes along an outer periphery of the arc tube at a predetermined interval.

  In the present invention, there is provided a light emitting rod holding member having a holder portion for holding a plurality of arc tubes at a predetermined interval along the outer periphery of the arc tube. Thus, the arc tube can be fixed in one direction without rotating along the outer periphery.

  The direct type backlight device according to the present invention is characterized in that the phases of the voltages applied to the wires of adjacent arc tubes are different.

  In the present invention, for example, even if the phase of the voltage applied to the adjacent arc tube wire using the inverter circuit is different, the adjacent arc tube wire attached to the holding portion Since it is separated by the wire separating member, the potential difference between the wires can be suppressed within a predetermined value, so that a short circuit between the wires (electrode discharge) can be prevented.

  The direct type backlight device according to the present invention is characterized in that the wire separating member is formed so as to protrude integrally or separately from the arc tube support on the back side between the adjacent holder portions.

  In the present invention, the wire separating member is formed so as to project integrally or separately from the arc tube support on the back side of the liquid crystal panel between the adjacent holder portions. Thereby, an arc tube can be assembled | attached, without wires connecting.

  The direct-type backlight device according to the present invention is characterized in that the wire separating member has a wire through hole that can be inserted in a state where adjacent wire members are separated.

  In the present invention, the wire separating member is provided with a wire through hole that can be inserted in a state where adjacent wires are separated by an appropriate length. Thereby, a wire can be separated reliably.

  A direct type backlight device according to the present invention includes a connector for integrally connecting two adjacent arc tube wires, and the wire separating member is a connector through-hole through which the connector can be inserted. And a notch that communicates the connector through hole and the wire through hole.

  In the present invention, two adjacent arc tube wires are integrally connected by a connector, and a connector through hole into which the connector can be inserted, and a notch portion through which the connector through hole and the wire through hole are communicated. It is provided on the wire separating member. As a result, first, the connector is inserted into the connector through-hole, and the wire rod of each arc tube is inserted into the lead wire through-hole from the notch portion, so that the wire can be easily and reliably assembled in a state of being separated by an appropriate length. Can be done.

  The direct type backlight device according to the present invention includes a connector for integrally connecting the wires of two adjacent arc tubes, and the wire separating member includes a plurality of connectors so that the connector can be inserted therethrough. It has the notch part which connects a wire through-hole.

  In the present invention, two adjacent arc tube wires are integrally connected by a connector, and a notch for communicating with a plurality of wire through holes is provided in the wire separating member, and the connector is inserted into this notch. Let In other words, the wire separating member is configured to be split with the line passing through the wire through hole as a boundary.

  In the direct type backlight device according to the present invention, the wire member separating member has a valve portion that opens and closes the connector through hole, and the connector is inserted into the connector through hole in a state where the connector through hole is opened. It is characterized by the above.

  In this invention, the valve part which opens and closes a connector through-hole is provided in a wire separation member, and a connector is inserted in a connector through-hole in the state which opened the connector through-hole. Since the connector through hole can be easily opened and closed by the valve portion, the connector through hole may be opened at least when the connector is inserted.

  In the direct type backlight device according to the present invention, the wire separating member is made of a material that can be deformed by pressing, and the valve portion is deformed by pressing to open the connector through hole. To do.

  In the present invention, the wire separating member is made of a material that can be deformed by pressing, and the connector is deformed by pressing to open the connector through hole. Thereby, the connector through hole can be appropriately opened by an extremely simple operation of pressing.

  In the direct type backlight device according to the present invention, the valve portion is rotatable about one axis, and the valve portion is rotated by pressing the valve portion so as to open the connector through hole. It is characterized by being.

  In the present invention, the valve portion is rotatable about one axis, and the valve portion is rotated by pressing to open the connector through hole. Thereby, even if it is a case where a wire separation member consists of a material which cannot change, a connector through-hole can be suitably opened by mechanical operation called rotation. Therefore, various types of materials can be applied to the wire separating member.

  The direct type backlight device according to the present invention is characterized in that the valve portion closes the connector through-hole when the valve portion is not pressed.

  In this invention, when there is no press to a valve part, a connector through-hole is closed by a valve part. As a result, it is possible to suppress external dust and the like from entering the direct type backlight device through the connector through-hole, and to prevent a decrease in light emission intensity due to dust adhering to the surface of the arc tube and occurrence of uneven brightness. Can do.

  The direct type backlight device according to the present invention is characterized in that the arc tube holding member and the wire separating member are made of an electrical insulating material.

  In the present invention, the arc tube holding member and the wire separating member are formed of an electrical insulating material, so that the wire can be prevented from being short-circuited.

  A display device according to the present invention is a direct type back in which the arc tube is disposed on the back side of the display panel by an arc tube support that supports a plurality of arc tubes in which wires are extended from electrodes provided at an end. A display device using a light device, wherein the direct backlight device includes any one of the above-described direct backlight devices.

  In the present invention, by using the direct backlight device as described above, it is possible to prevent a decrease in light emission intensity as a display device and a decrease in display quality due to occurrence of luminance unevenness.

  According to the present invention, a plurality of holding portions for positioning and holding the end portions of the arc tube at predetermined intervals are arranged in parallel on the arc tube support that supports the plurality of arc tubes, and are attached to the respective holding portions. Since the wire separating member that separates the adjacent arc tube wires in the state is provided, the positioning of the arc tube electrode portions at a plurality of locations can be easily fixed in a state where the adjacent arc tube wires are separated by an appropriate length. It is possible to control stable optical characteristics, that is, the luminance distribution and local luminance unevenness of the direct type backlight device. And, while realizing stable assembly of the arc tube, it is possible to improve workability and productivity, prevent short-circuiting (electrode discharge) of the adjacent arc tube, and prevent the wire itself from being discharged between the wires. Damage and generation of ozone odor due to the damage can be prevented.

  According to the present invention, the arc tube is rotated along the outer periphery by providing the arc tube holding member having the holder portion that holds the plurality of arc tubes along the outer periphery of the arc tube at a predetermined interval. It can be fixed in one direction without causing it.

  According to the present invention, for example, even when the phase of the voltage applied to the wire rod of the adjacent arc tube using the inverter circuit is different, the wire rod of the adjacent arc tube attached to the holding portion is the wire rod. Since it is separated by the separating member, the potential difference between the wires can be suppressed to within a predetermined value, so that a short circuit between the wires (electrode discharge) can be prevented.

  According to the present invention, since the wire separating member is formed so as to protrude integrally with or separately from the arc tube support between the adjacent holder portions on the back side of the liquid crystal panel, the arc tube without contact between the wires. Can be assembled.

  According to the present invention, the wire rod through hole that can be inserted in a state where the adjacent wire rods are separated by an appropriate length is provided in the wire rod separation member, so that the wire rods can be reliably separated, and a short circuit between the wire rods (electrode discharge) is prevented. Can be prevented.

  According to the present invention, two adjacent arc tube wires are integrally connected by a connector, and a connector through hole into which the connector can be inserted, and a cutout portion through which the connector through hole and the wire through hole are communicated. Since it is configured to be provided in the separation member, first, the connector is inserted into the connector through hole, and the wire material of each arc tube is penetrated from the notch portion to the lead wire through hole, so that the wire material is separated at an appropriate length. Assembling can be performed easily and reliably. Thus, the wire can be easily incorporated into the wire through-hole from the notch.

  According to the present invention, two adjacent arc tube wires are integrally connected by a connector, a notch portion that communicates a plurality of wire material through holes is provided in the wire material separating member, and the connector is inserted into the notch portion. The configuration, in other words, the wire separating member can be divided with the line passing through the wire through hole as a boundary, so that the wire can be easily incorporated into the wire through hole by dividing the wire separating member.

  According to the present invention, the wire separating member is provided with the valve portion for opening and closing the connector through hole, and the connector is inserted into the connector through hole with the connector through hole opened. The connector can be easily opened and closed, and at least when the connector is inserted, the connector through hole may be opened.

  According to the present invention, since the wire separating member is made of a material that can be deformed by pressing, and the valve portion is deformed by pressing to open the connector through hole, the connector through hole is appropriately formed by an extremely simple operation of pressing. Can be opened.

  According to the present invention, since the valve portion is rotatable about one axis and the valve portion is rotated by pressing to open the connector through hole, the wire separating member cannot be deformed. Even if it consists of, a connector through-hole can be suitably opened by mechanical operation called rotation. Therefore, various types of materials can be applied to the wire separating member.

  According to the present invention, when the valve portion is not pressed, the connector through hole is closed by the valve portion, so that external dust and the like are prevented from entering the direct backlight device through the connector through hole. In addition, it is possible to prevent the emission intensity from decreasing and the occurrence of luminance unevenness due to dust adhering to the surface of the arc tube.

  According to the present invention, since the arc tube holding member and the wire separating member are formed of the electrical insulating material, the discharge between the wires (electrodes) can be prevented.

  According to the present invention, since the direct backlight device as described above is used for a display device, it is possible to prevent a decrease in light emission intensity as a display device and a decrease in display quality due to occurrence of luminance unevenness. it can.

  The best mode for carrying out the present invention will be described below with reference to the drawings.

(First embodiment)
1 to 4 show examples of embodiments of the present invention. FIG. 1A shows a schematic configuration of a liquid crystal display device according to the first embodiment to which the direct backlight device of the present invention is applied. FIG. 2B is a side sectional view of the liquid crystal display device, FIG. 2 is an explanatory view showing the configuration of the arc tube support and the wire separating member constituting the direct type backlight device, and FIG. 3 is the arc tube FIG. 4 is an explanatory side view showing the assembled state of the support and the wire separating member, and FIG. 4 is a side sectional view showing the configuration of the wire separating member.

  1st Embodiment is the liquid crystal display device 1 which employ | adopted the direct type backlight apparatus 2 which irradiates the liquid crystal panel 3 from the back surface with the several arc tube 9, as shown to Fig.1 (a), (b). .

  The direct type backlight device 2 mainly includes a reflective polarizing plate 4, a prism sheet 5, a diffusion sheet 6, and a diffusion plate 7 disposed in order on the back surface of the liquid crystal panel 3, and is further configured integrally with a housing 8 on the rear side. A plurality of arc tubes 9 and an inverter device 20 are included.

  The casing 8 mainly includes a plurality of arc tubes 9 having the same cylindrical shape, a lamp holder 10 as an arc tube support that supports the arc tube 9, and a light not reflected from the arc tube 9 (not shown). A reflection sheet or the like is provided integrally.

  As shown in FIG. 2, the arc tube 9 has a lead wire 9a connected to electrodes (not shown) at both ends thereof, and a connector 9b connected to an end portion of the lead wire 9a. By this connector 9b, the lead wires 9a, 9a of the two arc tubes are integrally connected. That is, the two arc tubes 9 and 9 are made into one set.

  The lamp holders 10 are provided at two positions on both ends at positions that support the end of the arc tube 9 in a direction substantially perpendicular to the axial direction of the arc tube 9.

  On the anti-liquid crystal panel side surface 10a of the lamp holder 10, a plurality of holding portions 10b for positioning and holding the end portion of the arc tube 9 are formed in a concave shape so as to follow the outer peripheral portion of the arc tube 9 at equal intervals.

  Further, between the holding portions 10b and 10b for holding the ends of the pair of (two) arc tubes 9 and 9 disposed on the side surface 10a opposite to the liquid crystal panel, lead wires 9a and 9a of the arc tubes 9 and 9 are connected. A rubber block 11 constituting a wire separating member that protrudes in a rectangular shape toward the anti-liquid crystal panel so as to be separated is provided.

  Further, as shown in FIGS. 2 and 3, a rubber holder 12 that surrounds the pair of lead wires 9 a and 9 a and the rubber block 11 and constitutes a wire separating member is provided separately from the rubber block 11. Yes.

  The rubber holder 12 has a rectangular shape, and a rectangular through hole 12a through which the lead wires 9a and 9a and the rubber block 11 can pass is formed at the center.

  Further, as shown in FIG. 4, at the position facing the arc tube 9 of the rubber holder 12, the light emission that holds the two arc tubes 9, 9 along the outer periphery thereof at the same interval as the interval between the holding portions 10b, 10b. The tube holder part 13 is formed in two places.

  The arc tube holder 13 is formed of a flexible material, has a substantially circular cross-sectional shape with a notch 13a in part, and the arc tube 9 is fitted from the notch 13a. .

  The housing 8 is formed in a box shape with an opening on the liquid crystal panel side, and is disposed with the opening side facing the diffusion plate 7.

  On the closed bottom surface 8a of the housing 8 on the side opposite to the liquid crystal panel, a lead wire through which the rubber block 11 and the lead wires 9a and 9a can penetrate to the outside of the housing 8 is provided in a portion facing the rubber block 11 and the rubber holder 12. An extraction window 8b is formed. Moreover, the inverter apparatus 20 is integrally attached to the back side of the bottom face 8a.

The inverter device 20 mainly has a configuration in which an inverter circuit 22 including an inverter transformer and the like is provided on the inverter circuit board 21.
The inverter circuit 22 is provided at a position substantially opposite to the rubber block 11 in a plan view, and is connected to a connector 9b to which a lead wire 9a of an arc tube 9 extending on the back side across the rubber block 11 is connected. .

  The inverter device 20 applies an alternating high voltage to the lead wires 9a, 9a of the arc tube 9, and the phase of the voltage is different.

  Next, assembly of the direct type backlight device 2 constituting the liquid crystal display device 1 according to the first embodiment will be described.

  First, both ends of the arc tube 9 are fitted into the holding portions 10b, 10b of the lamp holder 10 in pairs every two. At this time, every two arcuate tubes 9 are arranged in parallel and at the same position with the rubber block 11 in between.

  The lead wires 9a, 9a of the pair of arc tubes 9, 9 are arranged through the through hole 12a of the rubber holder 12 together with the connector 9b with the rubber block 11 interposed therebetween, and the outer periphery of the arc tube 9 is the arc tube holder portion 13. The rubber holder 12 is fixed to the lamp holder side in a state of being fitted to the lamp holder.

  In this way, the plurality of arc tubes 9 are integrally formed as a lamp unit 90 having substantially the same height and the same height by the lamp holder 10 and the rubber holder 12.

  The inverter device 20 and the like are assembled on the back side of the housing 8 in a separate process from the assembly of the arc tube 9.

Then, the lamp unit 90 and the casing 8 on which the inverter device 20 is mounted are assembled.
At this time, the lamp unit 90 is attached to the housing 8 in a state where the lead wires 9a and 9a and the connector 9b connected to the arc tubes 9 and 9 are taken out from the lead wire extraction window 8b of the housing 8 to the back side. .

  Then, the connector 9b is connected to the inverter circuit 22, and the assembly of the direct type backlight device 2 is completed.

  Since it comprised as mentioned above, according to 1st Embodiment, since the arc_tube | light_emitting_tube 9 can be comprised in the state positioned correctly as the lamp unit 90 separately from the inverter apparatus 20, when assembling | attaching to the housing | casing 8 In addition, it can be assembled easily and reliably.

  According to the first embodiment, the arc tube 9 can be accurately and reliably held by the lamp holder 10 and the rubber holder 12.

  Furthermore, according to the first embodiment, the lead wire 9a of the adjacent arc tube 9 can be reliably separated by the rubber block 11.

  Furthermore, according to the first embodiment, since the rubber holder 12 is configured separately from the rubber block 11 and the arc tube holder portion 13 that holds the arc tube 9 is formed, the arc tube 9 is connected to the lamp holder 10. Before assembling, the lamp units 90 can be accurately unitized every two, so that the lamp unit 90 can be configured easily and accurately.

(Second Embodiment)
Next, a second embodiment of the present invention will be described in detail with reference to the drawings.
FIG. 5A is a front view of one end portion showing a schematic configuration of a liquid crystal display device according to a second embodiment to which the direct type backlight device of the present invention is applied, and FIG. 5B is a side sectional view of the liquid crystal display device. FIG. 6 is an explanatory view showing the structure of the arc tube support and the wire separating member constituting the direct type backlight device, and FIG. 7 is an explanatory view showing the assembled state of the arc tube support and the wire separating member, FIG. FIG. 3 is a perspective view showing a configuration of a wire separating member.

  As shown in FIGS. 5A and 5B, the second embodiment is a liquid crystal display device 100 that employs a direct backlight device 102 that irradiates the liquid crystal panel 3 from the back surface with a plurality of arc tubes 9. .

  The configuration of the liquid crystal display device 100 according to the second embodiment has substantially the same configuration as the configuration of the liquid crystal display device 1 according to the first embodiment except for the configuration of the direct backlight device 102. Therefore, about the structure similar to the liquid crystal display device 1 which concerns on 1st Embodiment, description is abbreviate | omitted by attaching | subjecting the same code | symbol.

  The direct type backlight device 102 mainly includes a reflective polarizing plate 4, a prism sheet 5, a diffusion sheet 6, and a diffusion plate 7 arranged in this order on the back surface of the liquid crystal panel 3, and is further configured integrally with the housing 8 on the rear side. A plurality of arc tubes 9 and an inverter device 20 are included.

  The casing 8 mainly includes a plurality of arc tubes 9 having the same cylindrical shape, a lamp holder 110 as an arc tube support that supports the arc tubes 9, and light from the arc tube 9 not shown. A reflection sheet or the like is provided integrally.

  As shown in FIGS. 6 and 7, a plurality of holding portions 110 b for positioning and holding the end portion of the arc tube 9 are arranged along the outer peripheral portion of the arc tube 9 at equal intervals on the anti-liquid crystal panel side surface 110 a of the lamp holder 110. A notch is formed in a concave shape. And the rubber holder 112 holding the arc tube 9 comprised separately is integrally attached to the lamp holder 110 for every two arc tubes 9 with which it mounts | wears.

  As shown in FIG. 8, the rubber holder 112 is formed in a rectangular shape along the longitudinal direction of the lamp holder 110, and a wire material separating portion 112 a that separates the lead wires 9 a of the pair of (two) arc tubes 9, 9 is opposite. A rectangular projection is formed toward the liquid crystal panel.

  Lead wire through holes 112b and 112b are formed in the central portion of the wire separating portion 112a so that the lead wires 9a and 9a can be penetrated in a state of being spaced apart from each other, and a connector through hole into which the connector 9b can be inserted. 120 is provided, and notches 112c and 112c are formed to communicate the connector through hole 120 and the lead wire through holes 112b and 112b.

  Further, at the position facing the arc tube 9 of the rubber holder 112, there are two arc tube holder portions 13 that hold the two arc tubes 9, 9 along the outer periphery thereof at the same interval as the interval between the holding portions 110b, 110b. Is formed.

  When the lamp unit 190 is configured by attaching the arc tube 9 to the lamp holder 110, first, the rubber holder 112 supports the pair of (two) arc tubes 9, 9, and the connector 9b is connected to the connector through hole 120. The lead wire 9a of each arc tube 9 is inserted into the lead wire through hole 112b from the notch portion 112c, and then the two pairs of arc tubes 9 and 9 are mounted on the lamp holder 110.

  In this way, the plurality of arc tubes 9 are integrally formed as a lamp unit 190 having substantially the same height and the same height by the lamp holder 110 and the rubber holder 112.

  Since the assembly of the arc tube 9 configured as the lamp unit 190 and the housing 8 is the same as the assembly of the direct type backlight device 2 of the first embodiment described above, the description thereof is omitted.

  Since it comprised as mentioned above, according to 2nd Embodiment, since the arc_tube | light_emitting_tube 9 can be comprised in the state positioned correctly as the lamp unit 190 separate from the inverter apparatus 20, when attaching to the housing | casing 8, In addition, it can be assembled easily and reliably.

  Further, according to the second embodiment, the rubber holder 112 has a function in which the function of the rubber block 11 according to the first embodiment and the function of the rubber holder 12 are integrated. What kind of effect can be realized.

  In the second embodiment, the connector through hole 120 and the lead wire through hole 112b are formed in the rubber holder 112, and the notch 112c communicating with the connector through hole 120 and the lead wire through hole 112b is formed. The present invention is not limited to the configuration of the rubber holder.

  For example, as another embodiment, as shown in FIG. 9, the lead wires 9a, 9a can be penetrated in the center of the wire separating portion 212a formed in the rubber holder 212 with a predetermined spacing. It is good also as a structure which formed the through-hole 212b, 212b and provided the notch part 220 which connects the lead wire through-hole 212b, 212b so that the connector 9b can be penetrated. In other words, the wire material separation part 212a may be divided into the wire material separation parts 212a1 and 212a2 with the line passing through the lead wire through holes 212b and 212b as a boundary.

  Since the rubber holder 112 is easily deformed by pressing, it is not necessary to make the outer dimension of the notch 220 larger than the outer dimension of the connector 9b, but when using a member that is difficult to deform by pressing, such as polycarbonate, the notch The outer dimension of 220 is made larger than the outer dimension of the connector 9b. With this configuration, the lead wire 9a can be more easily inserted into the lead wire through hole 212b.

  Further, as shown in FIG. 10, a valve portion 312d is provided in the wire separating portion 312a of the rubber holder 312 and the valve portion 312d is pressed during assembly so as to deform the valve portion 312d and open the connector through hole 320. It may be the configuration.

  The valve portion 312d can be configured, for example, by forming a cutout portion 312c communicating with the lead wire through holes 312b and 312b. By setting the connector through hole 320 to the open state in this way, the connector 9b can be inserted into the opened connector through hole 320. Of course, the connector through-hole 320 can be opened by pressing the valve portion 312d with the connector 9b during assembly.

  After assembly, the pressure on the valve portion 312d disappears and the valve portion 312d closes the connector through hole 320, so that external dust and the like can be prevented from entering the direct type backlight device through the connector through hole 320, It is possible to prevent a decrease in emission intensity due to dust adhering to the surface of the arc tube and occurrence of luminance unevenness. In this way, the connector through hole 320 can be easily opened and closed by the valve portion 312d. Therefore, the connector through hole 320 may be opened at least when the connector 9b is inserted.

  Furthermore, although FIG. 10 demonstrated the case where the valve part 312d was one, as shown in FIG. 11, you may make it comprise the valve part 312d by two 1st valve parts 312d1 and 2nd valve parts 312d2. In this case, the two first valve portions 312d1 and the second valve portion 312d2 are expanded by pressing to form through holes for penetrating the connector 9b. Thus, the shape and the number of the valve portions 312d are not limited.

  Further, the rubber rubber holder that can be deformed by pressing has been described as the wire separating member. However, when a member that is difficult to be deformed by pressing, such as polycarbonate, is used, as shown in FIG. 12, shafts 412e and 412e are provided with shafts. A wire member separating member that is provided with a valve portion 412d that can rotate around a shaft 412f that is passed through and presses the valve portion 412d during assembly to rotate the valve portion 412d to open the connector through hole 420. The polycarbonate holder 412 may be used. Of course, similarly to the above, the connector through-hole 420 can be opened by pressing the valve portion 412d with the connector 9b during assembly.

  After assembly, the pressure on the valve portion 412d disappears, and the valve portion 412d is returned to its original position by a spring (not shown) to close the connector through hole 420, so that external dust or the like is directly below the connector through hole 420. It is possible to suppress the intrusion into the backlight device, and it is possible to prevent the emission intensity from being reduced and the occurrence of luminance unevenness due to dust adhering to the surface of the arc tube. Thus, even if the wire separating member is made of a material that cannot be deformed, the connector through-hole 420 can be appropriately opened by a mechanical operation of turning. Accordingly, the wire separating member can be formed of various kinds of materials.

  The direct backlight device of the present invention and the display device using the direct backlight device are not limited to the above-described embodiments and modifications, and within the scope not departing from the gist of the present invention, Of course, various configurations can be modified.

(A) is the front view of the one-side edge part which shows schematic structure of the liquid crystal display device which concerns on 1st Embodiment with which the direct type backlight apparatus of this invention was applied, (b) is side sectional drawing of a liquid crystal display device. . It is explanatory drawing which shows the structure of the arc_tube | light_emitting_tube support body and wire rod separation member which comprise a direct type | mold backlight apparatus. It is explanatory drawing which shows the assembly | attachment state of a luminous tube support body and a wire separation member. It is side surface sectional drawing which shows the structure of a wire separation member. (A) is the front view of the one-side edge part which shows schematic structure of the liquid crystal display device based on 2nd Embodiment to which the direct type | mold backlight apparatus of this invention was applied, (b) is side sectional drawing of a liquid crystal display device. . It is explanatory drawing which shows the structure of the arc_tube | light_emitting_tube support body and wire rod separation member which comprise a direct type | mold backlight apparatus. It is explanatory drawing which shows the assembly | attachment state of a luminous tube support body and a wire separation member. It is a perspective view which shows the structure of a wire separation member. It is a perspective view which shows the structure of the other Example of the wire separation member which concerns on 2nd Embodiment. It is a perspective view which shows the structure of the other Example of the wire separation member which concerns on 2nd Embodiment. It is a perspective view which shows the structure of the other Example of the wire separation member which concerns on 2nd Embodiment. It is a perspective view which shows the structure of the other Example of the wire separation member which concerns on 2nd Embodiment. It is a front view from the liquid crystal panel back side which shows schematic structure of the conventional direct type | mold backlight apparatus. It is explanatory drawing which shows the structure of the arc tube used for the conventional direct type backlight apparatus. It is detail drawing of the arc tube edge part which shows schematic structure of the conventional arc tube.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1,100 Liquid crystal display device 2,102 Direct type backlight apparatus 3 Liquid crystal panel 4 Reflective polarizing plate 5 Prism sheet 6 Diffusion sheet 7 Diffusion plate 8 Case 8a Bottom surface 8b Lead wire penetration window 9 Light emitting tube 9a Lead wire 9b Connector 10, 110 Lamp holder 10a, 110a Anti-liquid crystal panel side surface 10b, 110b Holding part 11 Rubber block 12, 112, 212, 312 Rubber holder 12a Through hole 13 Arc tube holder part 13a Notch part 14 Reflecting sheet 20 Inverter device 21 Inverter circuit board 22 Inverter circuit 90, 190 Lamp unit 112a, 212a, 212a1, 212a2, 312a, 412a Wire material separation part 312d, 312d1, 312d2, 412d Valve part 112b, 212b, 312b Lead wire through hole 112c Notch part 1 0,320,420 connector holes 412 polycarbonate holder 412e bearing 412f axis

Claims (13)

In a direct type backlight device in which the arc tube is arranged on the back side of the display panel by an arc tube support that supports a plurality of arc tubes in which wires are extended from electrodes provided at the end,
The arc tube support body is provided with a plurality of holding portions for positioning and holding the end portions of the arc tube at predetermined intervals.
A direct-type backlight device comprising a wire separating member that separates the wires of adjacent arc tubes attached to the holding portion. The direct-type backlight device according to claim 1, further comprising: an arc tube holding member having a holder portion that holds a plurality of arc tubes at a predetermined interval along the outer periphery of the arc tube. The direct-type backlight device according to claim 1, wherein phases of voltages applied to the wires of adjacent arc tubes are different from each other. 4. The wire rod separating member according to claim 1, wherein the wire separating member is formed integrally or separately with the light emitting rod support on the back side between the adjacent holder portions. Direct type backlight device. The direct-type backlight device according to any one of claims 1 to 3, wherein the wire separating member has a wire through hole that can be inserted in a state where adjacent wire members are separated. It is equipped with a connector for integrally connecting two adjacent arc tube wires,
The wire separating member is
A connector through-hole through which the connector can be inserted; and
The direct-type backlight device according to claim 5, further comprising a notch portion that communicates the connector through hole and the wire through hole. It is equipped with a connector for integrally connecting two adjacent arc tube wires,
The wire separating member is
The direct type backlight device according to claim 5, further comprising: a notch portion that communicates a plurality of wire rod through holes so that the connector can be inserted therethrough. The wire separating member has a valve portion for opening and closing the connector through hole,
The direct type backlight device according to claim 6, wherein the connector is inserted into the connector through hole in a state where the connector through hole is opened. The wire separating member is made of a material that can be deformed by pressing,
The direct type backlight device according to claim 8, wherein the valve portion is deformed by pressing to open the connector through hole. The valve portion is rotatable about one axis,
The direct type backlight device according to claim 8, wherein the valve portion is rotated by pressing the valve portion to open the connector through hole. 11. The direct type backlight device according to claim 9, wherein the valve portion closes the connector through-hole when the valve portion is not pressed. The direct type backlight device according to any one of claims 1 to 11, wherein the arc tube holding member and the wire separating member are formed of an electrical insulating material. A display device using a direct-type backlight device in which the arc tube is arranged on the back side of the display panel by an arc tube support that supports a plurality of arc tubes in which wires are extended from electrodes provided at end portions. There,
A display device comprising the direct type backlight device according to any one of claims 1 to 12 as the direct type backlight device.

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