JP4722082B2 - Backlight device and display device - Google Patents

Description

  The present invention relates to a backlight device and a display device capable of improving the strength of a backlight chassis and reducing the weight of the backlight chassis.

Conventionally, a display device having a backlight device has been provided with a reinforcing metal fitting made of a steel plate on the back surface of the backlight chassis that supports the arc tube to prevent the backlight chassis from being warped or bent (see Patent Document 1). In addition, a reinforcing bracket is provided at an end of the backlight chassis, the reinforcing bracket is attached to a frame portion that supports the display panel, and the backlight chassis is fixed to the frame portion.
JP 2006-30936 A

  The conventional backlight device is provided with reinforcing metal fittings corresponding to the warp / deflection of the backlight chassis, and when many reinforcing metal fittings are provided on the backlight chassis, the weight of the display device increases. The arc tube is supported by a lamp clip provided in the backlight chassis, and an insertion hole for inserting the lamp clip is formed in the backlight chassis. There was a problem that dust entered the inside and light leaked from the insertion hole.

  The present invention has been made in view of such circumstances, and a support plate for supporting the arc tube and a chassis facing the support plate are provided, and a honeycomb structure reinforcing member is provided between the support plate and the chassis. It is an object of the present invention to provide a backlight device and a display device that can improve the strength of the backlight chassis, reduce the number of reinforcing metal fittings, and reduce the weight of the backlight chassis by forming the backlight chassis. To do.

  Further, by fixing a part of the chassis to the frame part that supports the display panel, the reinforcing metal fitting used when the chassis is fixed to the frame part can be reduced, and the backlight can be reduced in weight. An object is to provide a device and a display device.

  Further, by bending the end portion of the support plate toward the chassis, and providing a bent portion that closes the space between the support plate and the chassis, the gap between the support plate and the reinforcing member, and the chassis and the reinforcing member, It is possible to prevent dust from entering through the gap of the light, prevent light from leaking out, prevent dust from adhering to the arc tube, and prevent user discomfort due to light leakage. An object is to provide a backlight device and a display device.

  Further, by bending the end portion of the support plate toward the display panel and providing a support portion for supporting the reflection sheet provided around the arc tube, the number of parts for supporting the reflection sheet can be reduced. An object of the present invention is to provide a backlight device and a display device that can be reduced in weight.

  Further, by providing a sandwiching member that sandwiches the support plate and the chassis, the support plate, the reinforcement member, and the chassis are sandwiched, and from the gap between the support plate and the reinforcement member, and the gap between the chassis and the reinforcement member Backlight device capable of preventing dust from entering, preventing light from leaking, preventing dust from adhering to the arc tube, and preventing user discomfort due to leakage of light And a display device.

  Further, by fixing the clamping member to a frame portion that supports the display panel, a backlight device capable of reducing the weight of the reinforcing metal fitting used when the chassis is fixed to the frame portion and reducing the weight, and An object is to provide a display device.

  Another object of the present invention is to provide a backlight device and a display device capable of reducing the weight and reducing the parts for supporting the reflection sheet by providing the holding member with a support base for supporting the reflection sheet. And

The backlight device according to the present invention includes a light emitting tube and a backlight chassis that supports the light emitting tube, and the backlight chassis is disposed on the back side of the display panel. The chassis is disposed on a support plate that supports the arc tube on the display panel side, on the opposite side of the support plate from the display panel side, the chassis facing the support plate, the support plate, have a reinforcing member of a honeycomb structure is provided between the chassis, the support plate is made by bending an end portion of the support plate to the chassis side, a bending portion that closes between the support plate and the chassis equipped and wherein the Rukoto.

In the present invention, a support plate for supporting the arc tube and a chassis facing the support plate are provided, and a reinforcing member having a honeycomb structure is provided between the support plate and the chassis to form a backlight chassis. This improves the strength of the backlight chassis and reduces the number of reinforcing brackets. Further, an end portion of the support plate is bent toward the chassis, and a bent portion is provided to close the space between the support plate and the chassis, thereby providing a gap between the support plate and the reinforcing member, and the chassis and the reinforcing member. This prevents dust from entering through the gaps and prevents light from leaking out.

  In the backlight device according to the present invention, the chassis includes a portion fixed to a frame portion that supports the display panel.

  In the present invention, by fixing a part of the chassis to the frame part that supports the display panel, the reinforcing metal fittings used when the chassis is fixed to the frame part are reduced.

  In the backlight device according to the present invention, a reflection sheet that reflects light is provided around the arc tube, and an end portion of the support plate is bent toward the display panel to support the reflection sheet. It comprises a part.

In the present invention, the reflection sheet is supported by providing a support base that supports the reflection sheet provided around the arc tube by bending the end of the support plate toward the display panel. For reducing parts.

The backlight device according to the present invention includes a light emitting tube and a backlight chassis that supports the light emitting tube, and the backlight chassis is disposed on the back side of the display panel. The chassis is disposed on a support plate that supports the arc tube on the display panel side, on the opposite side of the support plate from the display panel side, the chassis facing the support plate, the support plate, has a reinforcing member of a honeycomb structure is provided between the chassis, characterized tare Rukoto sandwiched the support plate and the chassis by clamping members.

  In the present invention, by providing a clamping member that sandwiches the support plate and the chassis, the support plate, the reinforcing member, and the chassis are clamped, and the gap between the support plate and the reinforcing member, and the chassis and the reinforcement are sandwiched. Dust is prevented from entering through a gap with the member, and light is prevented from leaking.

  In the backlight device according to the present invention, the holding member includes a portion fixed to a frame portion that supports the display panel.

  In the present invention, the reinforcing member used when the chassis is fixed to the frame portion is reduced by fixing the clamping member to the frame portion supporting the display panel.

  The backlight device according to the present invention is characterized in that a reflection sheet that reflects light is provided around the arc tube, and the clamping member has a support base that supports the reflection sheet.

  In the present invention, the support member for supporting the reflection sheet is provided on the clamping member, thereby reducing the number of parts for supporting the reflection sheet.

  The display device according to the present invention includes a display panel and any one of the backlight devices provided on the back side of the display panel.

  In the present invention, by providing any one of the backlight devices on the back side of the display panel, the strength of the backlight chassis is improved and the display device is reduced in weight.

  In the backlight device according to the present invention, a support plate that supports the arc tube and a chassis that faces the support plate are provided, and a reinforcing member having a honeycomb structure is provided between the support plate and the chassis to provide the backlight chassis. By forming the backlight chassis, the strength of the backlight chassis can be improved, the reinforcing metal fittings can be reduced, and the weight of the backlight chassis can be reduced.

(Embodiment 1)
Hereinafter, the present invention will be described in detail with reference to the drawings showing a backlight device and a display device according to Embodiment 1. 1 is an external view showing a liquid crystal display device according to Embodiment 1, FIG. 2 is a schematic cross-sectional view taken along line II-II in FIG. 1, and FIG. 3 is a schematic exploded perspective view showing a main part configuration of a backlight device. FIG.

  In the figure, reference numeral 1 denotes a display panel, and the display panel 1 is supported by a frame-shaped front cabinet 2. A rear cabinet 3 is attached to the front cabinet 2.

  A diffusion plate 4 for uniformly diffusing light is provided on the back side of the display panel 1, and a backlight device 5 is provided on the back side of the diffusion plate 4. The backlight device 5 includes a backlight chassis 6, a plurality of lamp clips 7, 7,... Provided on the backlight chassis 6, and a plurality of lamp clips 7, 7,. .. Are provided.

  The backlight chassis 6 is provided between a support plate 60 that supports the arc tubes 8, 8,..., A plate-like chassis 61 that faces the support plate 60, and the support plate 60 and the chassis 61. And a reinforcing member 62 having a honeycomb structure.

  A plurality of insertion holes 60a, 60a, ... through which the lamp clips 7, 7, ... are inserted in the support plate 60, and the lamp clips 7, 7, ... are provided. The surface is opposed to the display panel 1 with the diffusion plate 4 interposed therebetween, and a tray-like reflection sheet 9 that reflects light is provided on the surface. The reflection sheet 9 is provided with through holes at positions corresponding to the lamp clips 7, 7,..., And the lamp clips 7, 7,. Further, the reflection sheet 9 has a flange portion 9 a, and the flange portion 9 a is in a position not facing the support plate 60.

  One side of the chassis 61 is extended outward for an appropriate length, and the extended portion faces the flange portion 9a of the reflection sheet 9 and the front cabinet 2, and a screw 10 is provided at a portion facing both of them. Two holes 61a and 61b through which 10 are inserted are respectively opened. A rod-shaped sheet support member 11 that supports the reflection sheet 9 is provided between the flange portion 9a and the chassis 61, and the screw 10 is inserted into the hole portion 61a so that the sheet support member 11 is inserted. The sheet support member 11 is pressure-bonded to the flange portion 9a. Further, the screw 10 is inserted through the hole 61 b and screwed into the front cabinet 2, and the chassis 61 is fixed to the front cabinet 2.

  In the backlight device 5 and the display device according to the first embodiment, a support plate 60 that supports the arc tubes 8, 8,... And a chassis 61 that faces the support plate 60 are provided. Further, the reinforcing member 62 having a honeycomb structure is provided between the chassis 61 to form the backlight chassis 6, thereby improving the strength of the backlight chassis 6, reducing the number of reinforcing metal fittings, and reducing the weight of the backlight chassis 6. Can be planned.

  Further, by fixing a part of the chassis 61 to the front cabinet 2 that supports the display panel 1, the number of reinforcing metal fittings used when the chassis 61 is fixed to the front cabinet 2 can be reduced, and the backlight device 5. The weight can be reduced.

(Embodiment 2)
Hereinafter, the present invention will be described in detail with reference to the drawings showing a backlight device and a display device according to a second embodiment. 4 is a schematic sectional view taken along line IV-IV in FIG. 1, and FIG. 5 is a schematic perspective view showing a support plate.

  The end portion of the support plate 60 is bent toward the chassis 61 to form a portion that is substantially perpendicular to the chassis 61. Further, the end portion of the portion that is substantially perpendicular to the chassis 61 is bent so as to be parallel to the chassis 61. The bent portion 60b is formed. A through hole 60c corresponding to a plurality of holes 61a provided in the chassis 61 is provided in a portion substantially parallel to the chassis 61 of the bent part 60b, and the screw 10 is connected to the holes 61a and 60c. The support plate 60 and the chassis 61 are in close contact with each other. A space between the support plate 60 and the chassis 61 is closed by a portion of the bent portion 60 b that is substantially perpendicular to the chassis 61.

  In the backlight device 5 and the display device according to the second embodiment, an end portion of the support plate 60 is bent toward the chassis 61, and a bent portion 60 b that closes the space between the support plate 60 and the chassis 61 is provided. This prevents dust from entering from the gap between the support plate 60 and the reinforcing member 62 and the gap between the chassis 61 and the reinforcing member 62, and prevents light from leaking, so that the arc tube It is possible to prevent dust from adhering to 8, 8,..., And to prevent user discomfort due to light leakage.

  Of the configurations of the backlight device 5 and the display device according to the second embodiment, the same configurations as those of the first embodiment are denoted by the same reference numerals as those of the first embodiment, and detailed description thereof is omitted.

(Embodiment 3)
Hereinafter, the present invention will be described in detail with reference to the drawings showing a backlight device and a display device according to a third embodiment. 6 is a schematic cross-sectional view taken along line VI-VI in FIG. 1, and FIG. 7 is a schematic perspective view showing a support plate.

  The end portion of the support plate 60 is bent toward the reflection sheet 9 to form a portion substantially perpendicular to the reflection sheet 9, and the end portion of the portion substantially perpendicular to the reflection sheet 9 is substantially parallel to the reflection sheet 9. Are formed into a plurality of crank-shaped support portions 60d, 60d,... That support the reflective sheet 9, and a plurality of bent portions 60b, 60b are formed between the support portions 60d, 60d,. Are formed. The tip portions of the support portions 60d, 60d,... Parallel to the reflection sheet 9 support the flange portion 9a and support the reflection sheet 9. A female screw is provided in the hole 61a and the through hole 60c, the screw 10 is screwed into the hole 61a and the through hole 60c, and the support plate 60 and the chassis 61 are brought into close contact with each other.

  In addition, the shape of bending part 60b, 60b, ... is not restricted to crank shape, U shape may be sufficient, and the shape which can support the reflective sheet 9 should just be sufficient.

  In the backlight device 5 and the display device according to Embodiment 3, the end of the support plate 60 is bent toward the reflection sheet 9 and is provided around the arc tubes 8, 8,. By providing the support portions 60d, 60d,... That support the reflective sheet 9, the number of parts for supporting the reflective sheet 9 can be reduced, and the backlight device 5 and the display device can be reduced in weight.

  Of the configurations of the backlight device 5 and the display device according to the third embodiment, the same reference numerals as those in the first or second embodiment are assigned to the same configurations as those in the first or second embodiment, and detailed description thereof is omitted. To do.

(Embodiment 4)
Hereinafter, the present invention will be described in detail with reference to the drawings showing a backlight device and a display device according to a fourth embodiment. FIG. 8 is a schematic cross-sectional view taken along line VIII-VIII in FIG. 1, and FIG. 9 is a schematic exploded perspective view showing a main part configuration of the backlight device.

  A chassis 61 that is substantially the same size as the support plate 60 is provided on the back side of the support plate 60, and through holes 60 e and 61 c are opened at the ends of the support plate 60 and the chassis 61 with their positions aligned. It is.

  A clamping member 15 that sandwiches the support plate 60 and the chassis 61 is provided at the ends of the support plate 60 and the chassis 61. The sandwiching member 15 is disposed so as to face the front cabinet 2, and a rectangular fixing plate 15a to be fixed to the front cabinet 2, and two cuts are made in both end portions of the fixing plate 15a, and both end portions are formed. Folded to the front cabinet 2 side so that it is substantially perpendicular to the fixed plate 15a, and is further clamped so that the tip of the bent portion is bent substantially parallel to the fixed plate 15a. Parts 15b and 15b. A hole 15e corresponding to the through-hole 60e and a female screw-like screw hole 15c corresponding to the through-hole 61c are formed in a portion parallel to the fixing plate 15a of the clamping portion 15b.

  As shown in FIG. 8, the end portions of the support plate 60 and the chassis 61 are sandwiched between the clamping portions 15b, screws 12 are inserted into the hole portions 15c and the through holes 60e and 61c, and the screw holes 15e are inserted. The support plate 60, the reinforcing member 62, and the chassis 61 are sandwiched by screwing. Further, screws 10 and 10 are inserted into holes 15d and 15d provided in the fixing plate 15a and screwed to the front cabinet 2 to fix the fixing plate 15a to the front cabinet 2.

  In the backlight device 5 and the display device according to Embodiment 4, the support plate 60, the reinforcing member 62, and the chassis 61 are sandwiched by providing the sandwiching member 15 that sandwiches the support plate 60 and the chassis 61. The arc tube 8, 8 prevents dust from entering through the gap between the support plate 60 and the reinforcing member 62 and the gap between the chassis 61 and the reinforcing member 62 and prevents light from leaking out. ,... Can be prevented from adhering to dust, and user discomfort due to light leakage can be prevented.

  Of the configurations of the backlight device 5 and the display device according to the fourth embodiment, the same configurations as those of the first to third embodiments are denoted by the same reference numerals as those of the first to third embodiments, and detailed description thereof is omitted. To do.

(Embodiment 5)
Hereinafter, the present invention will be described in detail with reference to the drawings showing a backlight device and a display device according to a fifth embodiment. FIG. 10 is a schematic cross-sectional view taken along line XX in FIG. 1, and FIG. 11 is a perspective view showing the appearance of the holding member.

  There is a clamping member 15 in which the clamping part 15b is formed at one end of the fixed plate 15a and a support base 15f for supporting the reflection sheet 9 is formed at the other end. The support base 15f is cut at the other end portion of the fixed plate 15a, the other end portion is bent toward the front cabinet 2 to make it substantially perpendicular to the fixed plate 15a, and the tip of the bent portion. The portion is bent so as to be substantially parallel to the fixed plate 15a, and is formed into a U-shaped cross section. As shown in FIG. 10, the length of the portion of the support base 15f that is substantially perpendicular to the fixing plate 15a is longer than the length of the portion of the clamping portion 15b that is perpendicular to the fixing plate 15a. A portion of the base 15f bent so as to be substantially parallel to the fixed plate 15a faces the flange 9a, and the flange 9a is supported by the support 15f.

  In the backlight device 5 and the display device according to Embodiment 5, by providing the clamping member 15 with a support base 15f that supports the reflection sheet 9, the number of parts for supporting the reflection sheet 9 is reduced, The backlight device 5 can be reduced in weight.

  Of the configurations of the backlight device and the display device according to Embodiment 5, the same configurations as those of Embodiments 1 to 4 are denoted by the same reference numerals as those of Embodiments 1 to 4, and detailed description thereof is omitted. .

1 is an external view illustrating a liquid crystal display device according to Embodiment 1. FIG. It is typical sectional drawing in the II-II line of FIG. FIG. 3 is a schematic exploded perspective view showing a main part configuration of the backlight device according to Embodiment 1; It is typical sectional drawing in the IV-IV line of FIG. 6 is a schematic perspective view showing a support plate of a liquid crystal display device according to Embodiment 2. FIG. It is typical sectional drawing in the VI-VI line of FIG. 6 is a schematic perspective view showing a support plate of a liquid crystal display device according to Embodiment 3. FIG. It is typical sectional drawing in the VIII-VIII line of FIG. FIG. 10 is a schematic exploded perspective view showing a main configuration of a backlight device according to Embodiment 4. It is typical sectional drawing in the XX line of FIG. FIG. 10 is a perspective view illustrating an appearance of a holding member of a liquid crystal display device according to a fifth embodiment.

Explanation of symbols

1 Display panel 2 Front cabinet (frame part)
DESCRIPTION OF SYMBOLS 5 Backlight apparatus 6 Backlight chassis 7 Lamp clip 8 Light emission tube 9 Reflection sheet 9a Eave part 15 Clamping member 15a Fixing plate 15b Clamping part 15f Support stand 60 Support plate 60a Insertion hole 60b Bending part 60d Support part 61 Chassis 62 Reinforcement member

Claims (7)

In a backlight device comprising an arc tube and a backlight chassis that supports the arc tube, the backlight chassis being disposed on the back side of the display panel,
The backlight chassis is
A support plate supporting the arc tube on the display panel side;
A chassis opposite to the display panel side of the support plate, facing the support plate;
Have a reinforcing member of a honeycomb structure is provided between said supporting plate and the chassis,
The support plate is made by bending an end portion of the support plate to the chassis side, the support plate and backlight device according to claim Rukoto includes a bent portion that closes between the chassis.   The backlight device according to claim 1, wherein the chassis includes a portion fixed to a frame portion that supports the display panel. A reflective sheet for reflecting light is provided around the arc tube;
3. The backlight device according to claim 1, further comprising a support portion configured to bend an end portion of the support plate toward the display panel and support the reflective sheet. In a backlight device comprising an arc tube and a backlight chassis that supports the arc tube, the backlight chassis being disposed on the back side of the display panel,
The backlight chassis is
A support plate supporting the arc tube on the display panel side;
A chassis opposite to the display panel side of the support plate, facing the support plate;
A reinforcing member having a honeycomb structure provided between the support plate and the chassis,
The support plate and backlight device according to claim Thea Rukoto to hold the chassis by clamping members. The backlight device according to claim 4 , wherein the clamping member includes a portion fixed to a frame portion that supports the display panel. A reflective sheet for reflecting light is provided around the arc tube;
The clamping member, the backlight device according to claim 4 or 5, characterized in that it has a support base for supporting the reflective sheet. A display panel, a display device characterized by comprising a backlight device according to any one of claims 1 to 6 is provided on the rear side of the display panel.

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