JP2009212056A - Light source device and display device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a light source device and a display device capable of making it difficult for outside dust to enter a case through between adjacent side edges of a rising piece of the case supporting a lamp therein. <P>SOLUTION: This light source device is provided with a case 22 supporting the lamp therein and having a quadrilateral plate portion 22a and rising pieces 22b to 22e rising up from the four edges of the plate portion 22a. Covers 8 are provided to cover adjacent side edges 22x and 22y of the rising pieces 22b to 22e to make it difficult for outside dust to enter through between the adjacent side edges 22x and 22y of the rising pieces even if there is a gap between the adjacent side edges 22x and 22y of the rising pieces 22b to 22e. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a light source device including a case for supporting a plurality of lamps therein, and a display device such as a liquid crystal television having a light source device arranged on the back side of a display panel having a display surface on the front side.

  A light source device included in a display device such as a liquid crystal television includes a plurality of lamps having electrodes at both ends, and a case in which the lamps are juxtaposed inside (for example, see Patent Document 1). The case has a substantially rectangular parallelepiped shape having a rectangular plate portion made of a metal plate and four rising pieces rising from the four sides of the plate portion by bending, and the lamp is accommodated and supported.

In addition, a display device including a light source device includes a display panel having a substantially rectangular parallelepiped shape, a front holding frame disposed on the front side of the peripheral edge of the display panel, and a rear side of the peripheral edge of the display panel. A display unit having a rear holding frame that is held in front and rear by a front holding frame, a light source device arranged behind the display unit, and an optical arranged between the light source device and the display unit A sheet and a sealing member that seals the peripheral portion of the optical sheet, and configured to prevent external dust from entering the rear side of the display panel from the peripheral side of the optical sheet (for example, Patent Document 1). Incidentally, dust that has entered the rear side of the display panel adheres to the rear surface of the display panel and appears as image unevenness on the image display surface of the display panel.
JP 2006-215512 A

  However, in the case of the light source device configured as in Patent Document 1, the rising pieces are bent and formed on the four sides of the quadrangular plate portion, and the terminals of the adjacent rising pieces are spaced apart from each other. Since a gap is generated between the end portions of the matching rising pieces, there is a possibility that external dust may enter the case through the gap between the end portions.

  In addition, the display device provided with this light source device is provided with a slight gap for absorbing thermal expansion of the optical sheet between the peripheral portion of the case in the light source device and the display unit. There is a possibility that dust entering the case may enter the back side of the display panel from the gap on the peripheral side of the optical sheet, and further improvement measures have been desired.

  The present invention has been made in view of such circumstances, and a main object thereof is to have a plate portion and a plurality of rising pieces rising from a plurality of peripheral edges spaced apart in the circumferential direction of the plate portion. A light source that makes it difficult for outside dust to enter the case from between the adjacent rising pieces by fixing a covering covering the adjacent rising pieces in the case supporting the lamp to the case body. To provide a device and a display device.

  A light source device according to the present invention includes a plate portion and a plurality of rising pieces that rise from a plurality of positions on the periphery of the plate portion, and includes a case that supports a plurality of lamps inside. It is characterized by comprising a covering for covering between the pieces.

  In the present invention, between the adjacent rising pieces among the plurality of rising pieces rising from the peripheral edge of the plate portion is covered with the covering, there is a gap between the adjacent rising pieces. However, it is possible to make it difficult for external dust to enter the case from between adjacent rising pieces.

  The light source device according to the present invention is a light source device that includes a rectangular plate portion and rising pieces that rise from four sides of the plate portion, and includes a case that supports a plurality of lamps inside. It is provided with the coating | coated body which coat | covers between upper pieces.

  In the present invention, among the rising pieces rising from the four sides of the plate portion, the space between the adjacent rising pieces is covered with the covering, and therefore there is a gap between the adjacent rising pieces. In this case, it is possible to make it difficult for external dust to enter the case from between adjacent terminal portions of the rising piece.

In the light source device according to the present invention, it is preferable that the covering body has three covering plate portions that cover side edges of adjacent rising pieces and a peripheral edge portion of the plate portion.
In this invention, since the gap between the corners can be covered by being fitted to the corners formed by the side edges of the adjacent rising pieces and the peripheral edge of the plate part, the dust-proofing of the corners is possible. Measures can be simplified.

Moreover, it is preferable that the light source device according to the present invention includes a fixing unit that fixes the covering to the case.
In the present invention, since the covering body is fixed, it is possible to eliminate the positional deviation of the covering body due to vibration during transportation and the like, and it is possible to maintain a dustproof state. Moreover, the side edge part of an adjacent standing piece can be reinforced with a coating | covering body, and the rigidity of a case can be improved.

Further, in the light source device according to the present invention, the fixing means includes a screw hole formed in at least one of the side edges, an insertion hole corresponding to the screw hole, and formed in the covering body, and the It is preferable to include a screw that is inserted into the insertion hole and screwed into the screw hole.
In this invention, since the covering body is fixed by screwing in the screw, it is possible to integrally connect the adjacent rising pieces with the covering body, thereby further increasing the rigidity of the case. obtain.

Moreover, it is preferable that the light source device according to the present invention has a configuration in which the fixing unit includes a double-sided tape attached to a surface of the covering body facing the case.
In this invention, since a covering can be fixed without using a tool, the workability | operativity for maintaining a dustproof state can be improved.

Further, in the light source device according to the present invention, the fixing means is disposed on a locking portion and a side edge portion that are disposed on a surface of the covering body facing the case, and the locking portion is locked. A configuration having a locked portion is preferable.
According to the present invention, the covering body can be fixed at an appropriate position without using a tool and without being stuck to a position shifted, and the fixing workability of the covering body can be improved.

In the light source device according to the present invention, it is preferable that the lamp has a tubular shape, includes a cover body that conceals an end portion of the lamp, and the cover body is provided integrally with the cover body.
In the present invention, there is no increase in the number of parts due to the provision of the covering body, and by attaching the cover body, the gaps at the corners of the case can be covered, and workability can be improved.

In addition, a display device according to the present invention includes a display unit having an image display surface on the front side and the light source device of the above-described invention disposed on the back side of the display unit.
In this invention, since the side edges of the adjacent rising pieces among the plurality of rising pieces rising from the peripheral edge of the plate portion are covered with the covering, the adjacent side edges of the rising pieces Even when there is a gap between them, it is difficult for external dust to enter the case from between the side edges of the adjacent rising pieces, and dust enters the back side of the display panel via the case. Can be difficult.

Further, in the display device according to the present invention, the display unit is disposed on a display panel supported on a peripheral part of the case, and a peripheral part front side of the display panel, and the peripheral part of the display panel is disposed on the peripheral part of the case. It is preferable to have a holding frame that is held by the front and back sides.
In this invention, since the peripheral part of the display panel is held by the peripheral part of the case and the holding frame, and there is no holding frame between the display panel and the case, the thickness of the display device is reduced. Can be reduced in thickness.

  According to the present invention, even when there is a gap between adjacent rising pieces of the case, it is difficult for external dust to enter the case from between adjacent side edges of the rising piece. Moreover, it is possible to make it difficult for dust to enter the back side of the display panel through the case.

Hereinafter, the present invention will be described in detail with reference to the drawings illustrating embodiments thereof.
Embodiment 1
1 is a front view showing the configuration of a display device according to the present invention, FIG. 2 is an exploded perspective view showing the configuration of the display device, FIG. 3 is a vertical side view with a part omitted, and FIG. It is a top view.

  This display device has an image display surface 1a for displaying a television image on the front side, a liquid crystal display panel 1 having a substantially rectangular parallelepiped shape, a light source unit 2 disposed on the rear side of the display panel 1, and the light source unit 2 and the optical sheet 3 disposed between the display panel 1 and the holding frame body 4 disposed on the front side of the peripheral portion of the display panel 1 and holding the front side of the peripheral portion of the display panel 1 back and forth by the light source unit 2; A liquid crystal television having a frame part 51 arranged on the front side of the peripheral part of the display panel 1 and having a cabinet 5 covering the peripheral part of the display panel 1 and the rear side of the light source part 2, in other words, a liquid crystal display device. is there. The light source unit 2 constitutes a light source device, and the display panel 1 and the holding frame 4 constitute a display unit.

  The holding frame 4 arranged on the front side of the display panel 1 includes a rectangular ring plate portion 41 facing the front surface of the peripheral edge of the display panel 1 and a rectangular tube extending rearward from the outer edge of the ring plate portion 41. And a through hole is formed at a plurality of circumferential positions of the ring plate portion 41. On the rear surface on the inner edge side of the ring plate portion 41, the peripheral edge portion of the display panel 1 is elastically provided. A band-like elastic body 43 to be received is attached.

  The light source unit 2 accommodates and supports a cylindrical tubular lamp 21 in which a plurality of lamps are juxtaposed in a vertical direction, and the peripheral part of the display panel 1 and the peripheral part of the optical sheet 3 are accommodated and supported. A case 22 that forms a substantially rectangular parallelepiped to support, cover bodies 23 and 23 that are arranged in parallel on both sides of the case 22 and conceal both ends of the lamp 21, and are arranged along the inner surface of the rear wall of the case 22. And a reflection sheet 24 that reflects the light emitted by the lamp 21 accommodated in the case 22 toward the open side of the case 22, and an electrical component such as a circuit board is attached to the outer surface of the rear wall of the case 22.

  The lamp 21 is a cold cathode tube or a hot cathode tube having electrodes at both ends, both ends are concealed by the cover bodies 23, 23, and an intermediate portion is held on the rear wall of the case 22 by a lamp clip.

  FIG. 5 is a perspective view in which a part of the configuration of the case 22 is omitted. The case 22 has a rectangular shape and includes a plate portion 22a as a rear wall, and first to fourth rising pieces 22b to 22e rising forward from four sides of the plate portion 22a. Forms a substantially rectangular parallelepiped by molding.

  The first and third upright pieces 22b and 22d that are spaced apart from each other up and down of the case 22 extend outward along the sheet surface of the optical sheet 3 from the front edges of the upright pieces 22b and 22d. The sheet receiving pieces 22f and 22f for receiving the upper and lower edge portions of the optical sheet 3, the extending pieces 22g and 22g extending forward from the outer edges of the sheet receiving pieces 22f and 22f, and the extending pieces The panel receiving pieces 22h and 22h that extend inward along the sheet surface of the optical sheet 3 from the front edges of 22g and 22g and receive the upper and lower edges of the display panel 1, and the sheet receiving pieces 22f and 22f Sheet holding pieces 22 i and 22 i that are cut and raised forward from a plurality of locations and hold the optical sheet 3 are integrally formed. A band-shaped elastic body 26 that elastically receives the peripheral edge of the display panel 1 is attached to the front surfaces of the panel receiving pieces 22h and 22h. Further, on the outer edge side of the sheet receiving pieces 22f, 22f, a connecting piece having a through hole corresponding to the insertion hole of the holding frame 4 is projected.

  The second and fourth upright pieces 22c and 22e that are spaced apart from each other in the lateral direction of the case 22 extend outward from the front edges of the upright pieces 22c and 22e along the sheet surface of the optical sheet 3. The receiving pieces 22j and 22j that are taken out and receive the cover bodies 23 and 23 and the coupling pieces 22k and 22k extending rearward from the outer edges of the receiving pieces 22j and 22j are integrally formed. The coupling pieces 22k, 22k are provided with a plurality of locking holes for locking locking claws described later.

  The cover bodies 23, 23 have a plurality of recesses corresponding to the lamp 21, are arranged inside the second and fourth rising pieces 22 c, 22 e, and conceal both ends of the lamp 21. The sheet receiving piece 23b extending outward from the front edge of the lamp concealing piece 23a along the sheet surface of the optical sheet 3 and receiving the side edge of the optical sheet 3, and the sheet receiving piece 23b A restricting portion 23c that extends forward from the outer edge and restricts lateral movement of the optical sheet 3, and extends outward from the front edge of the restricting portion 23c along the sheet surface of the optical sheet 3, A panel receiving piece 23d for receiving the side edge, a coupling piece 23e extending rearward from the outer edge of the panel receiving piece 23d, and a leg piece 23f extending rearward from the rear surface of the panel receiving piece 23d. And is integrally molded from a synthetic resin material. And it is fixed by a plurality of screws 22 of the plate portion 22a. A band-shaped elastic body 26 that elastically receives the peripheral edge of the display panel 1 is attached to the front surfaces of the panel receiving pieces 22h and 22h. Further, a screw hole corresponding to the insertion hole is formed on the outer edge side of the panel receiving piece 23d, and a locking claw corresponding to the locking hole is provided in the coupling piece 23e.

  In the case 22 of the light source unit 2 configured as described above, the adjacent side edges of the first to fourth rising pieces 22b to 22e are separated from each other, and the side edges of the adjacent rising pieces are opposed to each other. In other words, a gap a is generated at the corner of the case 22, and a covering 8 that covers the gap a is provided. FIG. 6 is an exploded perspective view showing the configuration of the rear side of the case 22, and FIG. 7 is a perspective view showing a state where the cover 8 is attached to the corner of the case 22.

  The covering body 8 includes adjacent side edge portions 22x and 22y of the first and second rising pieces 22b and 22c, corner portions of the plate portion 22a, and adjacent sides of the first and fourth rising pieces 22b and 22e. Edges 22x, 22y and corners of plate 22a, side edges 22x, 22y adjacent to second and third rising pieces 22c, 22d, corners of plate 22a, third and fourth rises The adjacent side edge portions 22x and 22y of the pieces 22d and 22e and the corner portions of the plate portion 22a are formed by three covering plate portions 8a, 8b and 8c, and the inner surfaces of the covering plate portions 8a, 8b and 8c are formed. The side edge portions 22x and 22y and the corner portions of the plate portion 22a are in contact with each other.

  Screw holes 25 and 25 are formed in the adjacent side edge portions 22x and 22y, respectively, and screw holes 25 and 25 are formed in the covering plate portions 8a and 8b that are in contact with the two side edge portions 22x and 22y of the covering body 8, respectively. Insertion holes 81, 81 corresponding to 25 are opened, and the cover 8 is fixed by screws 9, 9 inserted into the insertion holes 81, 81 and screwed into the screw holes 25, 25. The insertion holes 81 and 81 have a small-diameter hole portion through which the screw portion of the screw 9 or 9 is inserted and a large-diameter concave portion that receives the head portion of the screw 9 or 9, and the head portion of the screw 9 or 9 does not protrude to the outside. It is configured as follows. The screw hole 25, the insertion hole 81, and the screw 9 constitute fixing means.

  The corner portion of the cover plate portion 8c that comes into contact with the corner portion of the plate portion 22a is cut out in a substantially V shape, and the cover 8 can be fitted on the corner portion of the case 22 using the cutout portion as a mark. Has been.

  The cabinet 5 is arranged on the front side of the peripheral edge of the display panel 1 and extends rearward from the frame portion 51 that covers the ring plate portion 41 of the holding frame body 4 and the outer edge of the frame portion 51, and from the holding frame body 4. A front cabinet 5a having a large square tube 52, a plate-like plate 53 covering the rear side of the case 22, and an outer edge of the plate-like plate 53 are extended forward, and the holding frame 4 A rear cabinet body 5b having a larger square tube portion 54, and configured to be dust-proof by fitting the square tube portions 52 and 54 together.

  The frame part 51 of the cabinet front part 5a is formed to be larger than the display panel 1, and a cylindrical boss corresponding to the insertion hole of the holding frame 4 is provided in a projecting manner. By inserting a screw into the through-hole and the insertion hole of the holding frame body 4 and screwing it into the cylindrical boss, the cabinet front part 5a, the holding frame body 4 and the light source unit 2 are integrated. In addition, cylindrical bosses 55 are integrally formed at a plurality of circumferential positions at the boundary between the frame portion 51 and the rectangular tube portion 52.

  A plurality of cylindrical bosses 56 corresponding to the holes of the cylindrical boss 55 are integrally formed on the outer edge portion of the dish-like plate portion 53 of the cabinet rear part 5 b so as to be separated from each other in the circumferential direction. By inserting the screw 57 and screwing it into the cylindrical boss 55, the cabinet front part 5a and the cabinet rear part 5b are integrated. A plurality of heat radiating holes are formed in the dish-like plate portion 53.

  In the display device configured as described above, the cover 8 is fitted to the corner portion where the gap a of the case 22 is generated, and the adjacent side edge portions 22x and 22y of the rising pieces 22b to 22e and the plate portion 22a. Since the corners are covered, the dust that has entered the cabinet 5 from the heat dissipation holes or the like provided in the dish-like plate portion 53 of the cabinet 5 is adjacent to the side edges of the rising pieces 22b to 22e in the case 22 adjacent to each other. It is difficult to enter the case 22 from between the portions 22x and 22y. Therefore, even when a slight gap for absorbing the thermal expansion of the optical sheet 3 is provided between the peripheral portion of the case 22 and the display panel 1, the dust in the cabinet 5 is removed from the case 22 due to aging. It is possible to prevent intrusion into the rear side of the display panel 1 through a gap on the inner side and the periphery of the optical sheet 3, and image unevenness due to dust can be prevented over a long period of time.

Embodiment 2
FIG. 8 is an exploded perspective view of the main part showing another configuration of the display device, and FIG. 9 is a perspective view showing a state where the cover 8 is attached to the corner of the case 22. In this display device, the cover 8 is fixed to the corner portion of the case 22 by the double-sided tape 10. The covering 8 is formed by three covering plate portions 8a, 8b, and 8c, and a double-sided tape 10 is attached to the surface of the covering plate portions 8a, 8b, and 8c that faces the case 22, and each of the double-sided tapes 10 stands. Adjacent to the side edges 22x and 22y of the upper pieces 22b to 22e and the corners of the plate 22a. The double-sided tape 10 constitutes a fixing means.
Since other configurations and operations are the same as those of the first embodiment, the same components are denoted by the same reference numerals, and detailed description thereof and description of operations and effects are omitted.

Embodiment 3
10 is an exploded perspective view of a main part showing another configuration of the display device, FIG. 11 is a perspective view showing a state in which the cover 8 is attached to the corner of the case 22, and FIG. 12 is a view in which the cover 8 is attached. It is sectional drawing of the location. In this display device, locking holes 27 and 27 as locked portions are formed in adjacent side edge portions 22x and 22y of the rising pieces 22b to 22e in the case 22, and three covering plate portions 8a and 8b are provided. , 8c, convex locking portions 82, 82 corresponding to the locking holes 27, 27 are provided on the surface of the covering 8 that faces the case 22, respectively. The locking hole 27 and the locking part 82 constitute a fixing means.

The cover 8 has locking portions 82 and 82 projecting from the surfaces of the cover plates 8 a and 8 b that contact the two side edges 22 x and 22 y facing the case 22, and the cover 22 is provided at the corner of the case 22. When the cover 8 is fitted, the locking portions 82 and 82 come into contact with the two side edge portions 22x and 22y, and the cover plate portions 8a and 8b are bent while the cover plate portions 8a and 8b are locked. The parts 82 and 82 are configured to be locked in the locking holes 27 and 27.
Since other configurations and operations are the same as those of the first embodiment, the same components are denoted by the same reference numerals, and detailed description thereof and description of operations and effects are omitted.

Embodiment 4
FIG. 13 is a perspective view of a main part showing another configuration of the display device. This display device is arranged on both sides in the case 22, and the side edges 22x and 22y adjacent to the rising pieces 22b to 22e and the plate are formed on both ends in the longitudinal direction of the cover bodies 23 and 23 that conceal both ends of the lamp 21. A covering 80 that covers the corners of the portion 22a on the inside is integrally formed.

The covering body 80 is formed by three covering plate portions 80a, 80b, and 80c that cover the adjacent side edge portions 22x and 22y of the rising pieces 22b to 22e and the corner portions of the plate portion 22a on the inner side. When the cover bodies 23.23 are disposed on both sides of the inside, the cover body 80 is configured to be disposed inside the corner portion of the case 22. The cover body 23 constitutes a fixing means.
Since other configurations and operations are the same as those of the first embodiment, the same components are denoted by the same reference numerals, and detailed description thereof and description of operations and effects are omitted.

  In the embodiment described above, the three covering plate portions 8a, 8b, 8c (80a, 80b, 80c) covering the adjacent side edge portions 22x, 22y of the rising pieces 22b-22e and the corner portions of the plate portion 22a are provided. 80c), the covering body 8 (80) has two covering plates that cover the adjacent side edge portions 22x and 22y of the rising pieces 22b to 22e. The parts 8a and 8b (80a and 80b) may have a substantially L-shaped cross section. Further, the covering 8 may be configured such that one covering plate portion is fixed in addition to the configuration in which the two covering plate portions 8a and 8b are fixed.

It is a front view which shows the structure of the display apparatus which concerns on this invention. It is a disassembled perspective view which shows the structure of the display apparatus which concerns on this invention. It is the vertical side view which abbreviate | omitted some display apparatuses which concern on this invention. It is the cross-sectional top view which abbreviate | omitted a part of display apparatus which concerns on this invention. It is the perspective view which abbreviate | omitted one part which shows the structure of the case of the display apparatus which concerns on this invention. It is a disassembled perspective view which shows the structure of the back side of a case. It is a perspective view which shows the state by which the cover body is mounted | worn at the corner | angular part of a case. It is a disassembled perspective view of the principal part which shows the other structure of the display apparatus which concerns on this invention. It is a perspective view which shows the state by which the cover body is mounted | worn at the corner | angular part of a case. It is a disassembled perspective view of the principal part which shows the other structure of the display apparatus which concerns on this invention. It is a perspective view which shows the state by which the cover body is mounted | worn at the corner | angular part of a case. It is sectional drawing of the location where the coating body is mounted | worn. It is a perspective view of the principal part which shows the other structure of the display apparatus which concerns on this invention.

Explanation of symbols

1 Display panel (display panel, display section)
DESCRIPTION OF SYMBOLS 1a Image display surface 2 Light source part (light source device)
21 Lamp 22 Case 22a Plate part 22b-22e Standing piece 22x, 22y Side edge part 23 Cover body 25 Screw hole (fixing means)
27 Locking hole (locked part, fixing means)
4 Holding frame body 5 Cabinet 8 Cover body 8a, 8b, 8c Cover plate part 81 Insertion hole (fixing means)
82 Locking part (fixing means)
9 Screw (fixing means)
10 Double-sided tape (fixing means)

Claims (10)

  In a light source device having a plate portion and a plurality of rising pieces rising from a plurality of peripheral portions of the plate portion and supporting a plurality of lamps therein, a covering for covering between adjacent rising pieces A light source device comprising:   In a light source device having a rectangular plate portion and rising pieces rising from four sides of the plate portion, and having a case for supporting a plurality of lamps inside, a covering for covering between adjacent rising pieces A light source device comprising:   The light source device according to claim 2, wherein the covering body includes three covering plate portions that cover side edges of adjacent rising pieces and a peripheral portion of the plate portion.   The light source device according to claim 1, further comprising a fixing unit that fixes the covering to the case.   The fixing means includes a screw hole formed in at least one of the side edge portions, an insertion hole corresponding to the screw hole, and an insertion hole provided in the covering body, and being inserted into the insertion hole. The light source device according to claim 4, further comprising a screw to be screwed.   The light source device according to claim 4, wherein the fixing means includes a double-sided tape that is attached to a surface of the covering body facing the case.   The said fixing | fixed means has a to-be-latched part which is distribute | arranged to the latching part and the said side edge part which are distribute | arranged to the surface facing the said case of the said covering, and the said latching | locking part is latched. Light source device.   The light source device according to any one of claims 2 to 7, wherein the lamp has a tubular shape, includes a cover body that conceals an end portion of the lamp, and the cover body is provided integrally with the cover body.   A display device comprising: a display unit having an image display surface on a front side; and the light source device according to claim 1 disposed on a back side of the display unit.   The display unit is supported on the display panel supported by the peripheral part of the case and the peripheral part of the display panel, and the holding frame body that holds the peripheral part of the display panel on the front and back with the peripheral part of the case The display device according to claim 9.

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