JP2009123554A - Display device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a display device for allowing maintenance involving the replacement of lamps without removing cover bodies concealing the tubular lamps at both ends, arranged side by side in mutually vertically separated relation. <P>SOLUTION: One side portion of a display part 1 having a display face 1a on the front side and formed in a front-view rectangular shape is pivotally supported on a backlight part 2 having the tubular lamps arranged side by side in mutually vertically separated relation and a case body 22 storing and supporting the lamps 21, in a longitudinally turnable manner. The cover bodies 3, 4 concealing the lamps 21 at both ends are mounted on one side portion of the display part 1 and on the opposite side portion opposite to one side portion, respectively. Thus, the display part 1 can be turned and the cover bodies 3, 4 can be moved to be separated from each other. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a thin display device such as a liquid crystal television or a plasma television.

  A thin display device such as a television has a display panel on the front side, a display unit having a rectangular shape when viewed from the front, a plurality of circular lamps spaced apart in the vertical direction, and the front side are opened. A backlight unit disposed on the rear side of the display unit, and a cover unit that conceals both ends of the lamp (for example, see Patent Document 1). Both ends of the lamp are held by two holders fixed in the case body. Further, the cover body has a reflection function of reflecting the light emitted from the lamp to the open side of the case body, and increases the brightness in the case body by concealing the lamp end portion that does not emit light, It is attached in the case body by a male screw.

In the display device configured as described above, an optical sheet such as a diffusion plate for diffusing the light generated by the lamp and irradiating the display panel is disposed on the front side of the backlight unit, and the front side of the optical sheet. A display part is arranged, and the peripheral part of the display part is attached to the peripheral part of the case body by a plurality of male screws.
JP 2006-66359 A

  By the way, in a thin display device such as a liquid crystal television, for example, when performing maintenance with lamp replacement, a plurality of male screws to which the display unit is attached are loosened, the display unit and the optical sheet are removed, and the backlight is removed. After opening the front side of the lamp, and removing the two covers that conceal both ends of the lamp, a work process to remove the lamp is required. After replacing the lamp, the cover and display And a work process for attaching the optical sheet, and in the case of a relatively large display device, a relatively large space for temporarily placing the display unit, the optical sheet and the cover body removed from the backlight unit is unnecessary. It was necessary to improve the situation.

  Therefore, the applicant of the present invention replaces the lamp by assembling the optical sheet in the display device having a rectangular shape in front view to the display unit and pivoting one side of the display unit to one side of the backlight unit. In the case of maintenance, the display unit can be opened forward by pivoting the display unit around the pivot, thereby reducing the maintenance work man-hours and a display device that does not require a temporary storage space for the display unit. Developed first.

  However, in the previously developed display device, since the two cover bodies that conceal both ends of the lamp are attached to the case body of the backlight portion by male screws, the backlight is rotated by the forward rotation of the display portion. After the front side of the part is opened, an operation process for removing the cover body is necessary, and an extra space for temporarily placing the removed cover body is necessary, and further improvement measures have been demanded.

  The present invention has been made in view of such circumstances, and the main purpose is to provide a cover body on the display unit connected to the backlight unit so that the backlight unit can be moved back and forth. An object of the present invention is to provide a display device capable of performing maintenance accompanied by lamp replacement without removing a cover body.

  A display device according to the present invention includes a display unit having a display surface on the front side, a tubular lamp, and a case body that accommodates and supports the lamp, and a backlight unit disposed on the rear side of the display unit. And in a display device comprising a cover body that conceals the end of the lamp, the display unit is connected to the backlight unit so as to be able to contact and separate in the front-rear direction with respect to the backlight unit, The cover body is provided in the display unit.

  In this invention, since the cover body moves integrally with the display portion by moving the display portion away from the backlight portion, the end portion of the lamp can be opened forward. Maintenance involving replacement of the lamp can be performed without removing the body, and even a relatively large display device can be easily maintained by a single operator.

In the display device according to the present invention, it is preferable that the display unit and the backlight unit have a rectangular shape when viewed from the front, and that the display unit and the backlight unit have a pivotal support on one side.
In this invention, since the end portion of the lamp can be opened by rotating the display portion forward with the pivot portion as a fulcrum, the display portion and the cover body can be used even in a relatively large display device. The maintenance work accompanied by the replacement of the lamp can be performed without requiring a space for temporarily placing the lamp, and the work efficiency of the maintenance can be improved.

In the display device according to the present invention, each of the one side portions has a connecting member arranged along each of the one side portion, and each of the connecting members is provided with the pivot portion. Is preferred.
In this invention, since the pivot part of the display part and the backlight part can be reinforced by the connecting member, it is possible to increase the rigidity when the display part is rotated forward with the pivot part as a fulcrum, Durability can be improved even with a relatively large display device.

Moreover, it is preferable that the display device according to the present invention has a configuration in which the pivotal support portion is disposed on one end side of the lamp.
In the present invention, when the display unit is rotated forward with the pivotal support as a fulcrum, the separation distance between the other end of the lamp and the display unit can be made relatively long. Even with a large number of display devices, it is possible to improve the workability of replacing all the lamps.

Further, in the display device according to the present invention, the opposed side portions of the display unit and the backlight unit that are opposed to the one side portion are arranged along the opposed side portions, and are in contact with each other to be behind the display unit. It is preferable that a rotation restricting member for restricting the rotation of the lamp is provided, and a cover body for concealing the other end of the lamp is arranged on the turn restricting member of the display unit.
In the present invention, the display unit can be stopped at an appropriate position without being affected by the rotational force when the display unit rotated forward is rotated backward, and the cover body can be appropriately operated. Therefore, the position of the cover body with respect to the lamp can be accurately maintained.

In the display device according to the present invention, the cover body includes a concealing portion that conceals the peripheral surface portion of the lamp, an attachment portion attached to the rotation restricting member, and the display surface from the attachment portion or the concealment portion. It is preferable to have a configuration that includes a light reflecting portion that extends to the side and faces a surface of the rotation restricting member of the display portion that faces the lamp.
In the present invention, the light reflecting portion of the cover body concealing the end peripheral surface portion of the lamp is opposed to the surface of the rotation restricting member facing the lamp, so that the number of components can be increased without increasing the number of parts. A decrease in luminance due to the movement restricting member can be suppressed.

  According to the present invention, by moving the display unit away from the backlight unit forward, the cover body moves integrally with the display unit, and the end of the lamp can be opened. Therefore, it is possible to carry out maintenance without replacing the lamp, reduce the number of maintenance work involving lamp replacement, and reduce the maintenance cost.

Hereinafter, the present invention will be described in detail with reference to the drawings illustrating embodiments thereof. FIG. 1 is a schematic cross-sectional plan view showing a configuration of a display device according to the present invention.
The thin display device shown in the drawing has a display surface 1a for displaying a television image on the front side, a display unit 1 having a rectangular shape in front view, and a plurality of tubular lamps 21 and lamps arranged side by side apart vertically. And a backlight unit 2 disposed on the rear side of the display unit 1, and a first body that is disposed on both ends of the lamp 21 and conceals both ends of the lamp 21. And a thin liquid crystal television including the second cover bodies 3 and 4, in other words, a liquid crystal display device.

  The display unit 1 includes a display panel 11 having a display surface 1a, holding frames 12 and 13 that hold the peripheral portion of the display panel 11 in the front and rear, and a diffusion disposed on the rear side of the inner holding frame 13. An optical sheet 14 such as a plate, and a support frame body 15 disposed on the rear side of the optical sheet 14 and supporting the optical sheet 14, the one side portion 15 a and the one side portion 15 a of the support frame body 15. The cover bodies 3 and 4 are attached to the rear surface of the opposing side portion 15b that faces each other.

  The holding frame 12 arranged on the front side of the display panel 11 extends rearward from a rectangular ring plate portion 12a facing the front surface of the peripheral edge of the display panel 11, and an outer edge of the ring plate portion 12a. It has a rectangular tube portion 12b. The holding frame 13 disposed on the rear side of the display panel 1 extends rearward from the rectangular ring plate portion 13a facing the rear surface of the peripheral edge portion of the display panel 11, and the outer edge of the ring plate portion 13a. The holding frame bodies 12 and 13 are coupled to the support frame body 15 by a plurality of male screws 16 that have a rectangular tube portion 13b that passes through the ring plate portions 12a and 13a. In addition, a plurality of insertion holes 12c and 13c through which the male screw 5 is inserted are opened on the opposite side portion (the other end side in the longitudinal direction of the lamp 21) facing one side portion of the rectangular tube portions 12b and 13b. Has been. Further, a plurality of positioning members 17 that contact the periphery of the display panel 11 to determine the position of the display panel 11 between the ring plate portions 12a and 13a, and a belt-like elastic member 18 that contacts the front and rear surfaces of the display panel 11, 18 are provided.

  The support frame 15 is formed in a rectangular shape having a size corresponding to the ring plate portion 13a by joining the ends of four rectangular tubes made of aluminum having a quadrilateral cross section. A peripheral portion of the optical sheet 14 is supported, and a male screw 16 is screwed to the outer peripheral side of the front surface. Two opposing first pivot pieces 61 protrude from the rear outer peripheral side of the one side 15a, which is one end in the longitudinal direction of the lamp 21, at two locations that are vertically separated from each other. Screw holes 15c and 15c are formed at a plurality of positions spaced apart vertically on the inner peripheral side of the rear surface of the facing side 15b.

  The backlight unit 2 includes a plurality of lamps 21 juxtaposed apart from each other vertically, a substantially rectangular parallelepiped opened forward, a case body 22 that houses and supports the lamps 21, A plurality of connectors 23 and 24 that hold both ends of the lamp 21, and an inner frame 25 that is attached to the inner peripheral edge of the case body 22 and surrounds the lamp 21 and the connectors 23 and 24. And an electrical component such as a circuit board is attached to the rear wall of the case body 22. The inner surface of the case body 22 is a reflection surface that should reflect the light emitted from the lamp 21 toward the open portion of the case body 22. The reflective surface includes a coating layer and a reflective sheet.

  The lamp 21 is a hot cathode tube having two convex terminals 21a and 21a at both ends. Each of the connectors 23 and 24 is connected to a power source, and has concave terminals 23a and 24a corresponding to the convex terminals 21a and 21a of the lamp 21 and grooves 23b and 24b connected to the concave terminals 23a and 24a. The convex terminals 21a and 21a are fitted into the grooves 23b and 24b by pressing from the radial direction of the lamp 21, and the convex terminals 21a and 21a are connected to the concave terminals 23a and 24a by rotating the lamp 21 about 90 degrees in the circumferential direction. It is configured to be able to. Note that one end of the lamp 21 can be directly fitted into the concave terminal 23a without fitting the convex terminal 21a into the groove 23b.

  The surrounding frame body 25 is formed in a rectangular shape by joining the end portions of four square tubes made of aluminum having a quadrangular cross section. In addition, on the front surface of the one side portion 25a which is one end side in the longitudinal direction of the lamp 21, two opposing second pivot pieces 62 are protruded at two locations spaced apart in the vertical direction. The display unit 1 is pivotally supported by the backlight unit 2 so that the display unit 1 can be rotated in the front-rear direction by inserting the pivot 63 into a through hole formed in the pivot support pieces 61 and 62. An insertion hole 22 a corresponding to the insertion holes 12 c and 13 c is formed in the opposite side part (the other end in the longitudinal direction of the lamp 21) that faces one side part of the case body 22, and the opposite side part 25 b of the surrounding frame body 25. Is provided with a screw hole 25c corresponding to the insertion hole 22a. Moreover, the one side part 25a of the surrounding frame 25 is formed by the rectangular cylinder shorter than the front-back length of the other three sides. Note that the first and second pivot pieces 61 and 62 and the pivot 63 constitute the pivot portion 6, and one side portions 15 a and 25 a of the support frame body 15 and the surrounding frame body 25 are formed on the display portion 1. A connecting member for connecting one side portion to one side portion of the backlight portion 2 so as to be rotatable by the pivotal support portion 6 is configured, and the opposing side portions 15b and 25b of the support frame body 15 and the surrounding frame body 25 are provided as display portions. A rotation restricting member that restricts the backward rotation of the one backlight portion 2 is configured.

  FIG. 2 shows the structure of the cover bodies 3 and 4, (a) is a perspective view with a part omitted, and (b) is a side view with a part omitted. The first and second cover bodies 3 and 4 are made of synthetic resin having high reflectivity such as polycarbonate, and are arranged in the case body 22 so as to be separated in the longitudinal direction of the lamp 21. The cover bodies 3 and 4 are connected to rectangular concealing portions 31 and 41 for concealing the end portion of the lamp 21 and one edge in the width direction of the concealing portions 31 and 41, and insertion holes 32a and 42a corresponding to the screw holes 15c and 15c are provided. The male screws 7 and 7 inserted into the insertion holes 32a and 42a of the mounting portions 32 and 42 are screwed into the screw holes 15c and 15c. It is attached to the support frame 15.

  The concealing portions 31, 41 have a plurality of concave portions 31a, 41a corresponding to the juxtaposition interval of the lamps 21 on the other edge side in the width direction, and the end portions of the lamps 21 are arranged in the concave portions 31a, 41a, respectively. The end portions and the connectors 23 and 24 are concealed so that the luminance in the case body 22 can be increased.

  In the display device configured as described above, one side of the display unit 1 is pivotally supported on one side of the backlight unit 2 by the pivotal support 6, and the opposite side of the display unit 1 is the opposite side of the backlight unit 2. Further, the cover bodies 3 and 4 for concealing both ends of the lamp 21 are attached to the support frame body 15 of the display section 1 so that the light emitted from the lamp 21 is emitted from the cover body 3. , 4 can be reflected.

  FIG. 3 is a schematic cross-sectional plan view showing a state in which the display unit 1 is rotated forward. At the time of maintenance involving replacement of the lamp 21, by loosening the male screw 5, the display unit 1 can be rotated forward about the pivot 6 as a fulcrum (the direction indicated by the white arrow in FIG. 3), The first and second cover bodies 3 and 4 can be moved away from the backlight unit 2 integrally with the display unit 1, and the front side of the backlight unit 2 and both ends of the lamp 21 can be opened. Therefore, maintenance accompanied by replacement of the lamp 21 can be performed without particularly removing the cover bodies 3 and 4, and a space for temporarily placing the cover bodies 3 and 4 is not required. When the lamp 21 is removed in the state shown in FIG. 3, the lamp 21 is rotated about 90 degrees in the circumferential direction to release the engagement between the convex terminals 21a, 21a and the concave terminals 23a, 24a, and the convex terminals 21a, 21a are connected to the connectors 23, 24. The lamp 21 can be detached from the connectors 3 and 4 by moving the lamp 21 radially outward (forward) while being positioned in the groove portions 23b and 24b.

  When the lamp 21 is replaced and the maintenance is completed, the first and second cover bodies 3 and 4 attached to the display unit 1 are rotated by rotating the display unit 1 rearward with the pivot 6 as a fulcrum. Conceals both ends of the lamp 21, and the display unit 1 conceals the front side of the backlight unit 2. In this state, the male screw 5 is screwed into the screw hole 25c of the surrounding frame body 25, whereby the opposing side portion 15b of the support frame 15 comes into contact with the opposing side portion 25b of the surrounding frame body 25, and the display unit 1 is fixed. be able to.

  In addition, since the display unit 1 is reinforced by the support frame 15 and the backlight unit 2 is reinforced by the surrounding frame 25, the display unit 1 and the backlight unit 2 can be used even in a relatively large display device. The rigidity of can be increased. Therefore, when the display unit 1 is rotated forward, even if the mass of the display unit 1 is concentrated on the pivotal support 6, damage to the pivotal support 6 can be prevented.

  FIG. 4 is a schematic cross-sectional plan view showing another configuration of the display device, and FIG. 5 is a perspective view in which a part of the other configuration of the cover bodies 3 and 4 is omitted. In this display device, concealing portions 31 and 41 of the mounting portions 32 and 42 are provided on the mounting portions 32 and 42 of the first and second cover bodies 3 and 4 which are formed of a synthetic resin having high reflectivity such as polycarbonate. The rectangular light reflecting portions 33 and 43 that extend forward from the side and face the inner side 15a of the support frame 15 and the inner side of the opposite side 15b are integrally provided, so that the support frame 15 affects the luminance. It is configured so that it can be reduced.

  Since the light reflecting portions 33 and 43 have high reflectivity, the light reflectivity inside the one side portion 15a and the opposite side portion 15b inside the support frame 15 can be increased without increasing the number of parts, and the luminance is lowered. Can be prevented.

  FIG. 6 is a schematic cross-sectional plan view showing another configuration of the display device. In this display device, instead of pivotally supporting the display unit 1 to the backlight unit 2, the display unit 1 to which the first and second cover bodies 3 and 4 are attached is moved back and forth with respect to the backlight unit 2 (contact and separation). The display unit 1 is moved forward and removed from the backlight unit 2 so that the front side of the backlight unit 2 can be opened and the end of the lamp 21 can be opened. It is a thing.

  Insertion holes 12c and 13c are formed in one side and opposite sides of the rectangular tube portions 12b and 13b in the holding frame bodies 12 and 13, and insertion holes 12c and 13c are provided in one side and opposite sides of the case body 22, respectively. Insertion holes 22a and 22a are opened corresponding to the screw holes 25c and 25c corresponding to the insertion holes 22a and 22a on one side and the opposite side of the surrounding frame 25. The display unit 1 is attached to the backlight unit 2 by the male screw 5 inserted into 12c, 13c, and 22a being screwed into the screw hole 25c. Further, the rear surface of the support frame body 15 is in contact with the front surface of the surrounding frame body 25.

  Attachment portions 32 and 42 of the first and second cover bodies 3 and 4 are attached to the support frame 15 of the display unit 1 by male screws 7 and 7.

  During maintenance involving replacement of the lamp 21, the display unit 1 can be moved forward by loosening the male screws 5 and 5 attached to the backlight unit 2 on one side and the opposite side of the display unit 1. In addition, the first and second cover bodies 3 and 4 can be moved away from the backlight unit 2 integrally with the display unit 1, and the front side of the backlight unit 2 and both ends of the lamp 21 can be opened. Can do. Therefore, maintenance accompanied by replacement of the lamp 21 can be performed without particularly removing the cover bodies 3 and 4, and a space for temporarily placing the cover bodies 3 and 4 is not required.

  In the embodiment described above, the first and second cover bodies 3 and 4 for concealing both ends of the cylindrical lamp 21 are provided on the display unit 1. The cover body 3 may be provided in the backlight unit 2. In this case, the first cover body 3 is pivotally supported on one side portion 25a of the surrounding frame body 25 so as to be pivotable in the front-rear direction, or covers the connector 23 and the one side portion 25a of the surrounding frame body 25. The body is attached to one side portion 25 a of the surrounding frame body 25. In the former configuration, after the display unit 1 is rotated forward with the pivot 6 as a fulcrum, the first cover body 3 is rotated forward to open one end of the lamp 21. In the former configuration, the cylindrical lamp 21 can be fitted into the connector 23 from the longitudinal direction of the lamp 21 in addition to fitting the protruding terminal 21 a at the end into the connector 23 from the radial direction of the lamp 21. Further, in the latter configuration, the lamp 21 can have the protruding terminal 21a at the end thereof fitted into the connector 23 from the longitudinal direction of the lamp 21, so that the second end of the lamp 21 is largely open when the other end side is largely open. Even if one cover body 3 is fixed to the backlight unit 2 side, the lamp 21 can be replaced.

  In the embodiment described above, the first and second cover bodies 3 and 4 that conceal both ends of the lamp 21 are provided. However, the first cover body 3 is eliminated and the surface of the connector 23 is removed. The brightness on one end side of the lamp 21 may be increased by increasing the reflectivity of the surface of the one side 25a of the surrounding frame 25.

  Further, in the embodiment described above, the rectangular light reflecting portions 33 and 43 covering the inner side of the one side portion 15a and the inner side of the opposite side portion 15b facing the inner side of the one side portion 15a and the inner side of the opposing side portion 15b are provided. Although it provided in the cover bodies 3 and 4, it replaces with the light reflection parts 33 and 43, a coating layer is apply | coated to the surface of the support frame 15, or a reflection sheet is affixed, and the surface of the support frame 15 is provided. You may make it improve light reflectivity. Further, the light reflecting portions 33 and 43 may be provided in the concealing portions 31 and 41 in addition to the mounting portions 32 and 42.

  Further, in the embodiment described above, one side portion of each of the support frame body and the surrounding frame body is a connecting member. However, the connecting member is a bowl-shaped member arranged on one side portion of each of the display portion and the backlight portion. It may be. Moreover, although the opposing side part of each of the support frame body and the surrounding frame body is a rotation restricting member, the rotation restricting member is a bowl-shaped member disposed on the opposing side part of each of the display part and the backlight part. There may be.

  The display device according to the present invention may be a thin liquid crystal display device such as a liquid crystal television, or may be a display device including a backlight unit that houses a lamp.

It is a typical cross-sectional top view which shows the structure of the display apparatus which concerns on this invention. BRIEF DESCRIPTION OF THE DRAWINGS The structure of the cover body of the display apparatus which concerns on this invention is shown, (a) is the perspective view which abbreviate | omitted one part, (b) is the side view which abbreviate | omitted a part. It is a typical cross-sectional top view which shows the state by which the display part of the display apparatus which concerns on this invention was rotated ahead. It is a typical cross-sectional plan view which shows the other structure of the display apparatus which concerns on this invention. It is the perspective view which abbreviate | omitted a part which shows the other structure of the cover body of the display apparatus which concerns on this invention. It is a typical cross-sectional plan view which shows the other structure of the display apparatus which concerns on this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Display part 1a Display surface 15 Support frame (connecting member, rotation control member)
2 Backlight part 21 Lamp 22 Case body 25 Enclosure frame (connecting member, rotation restricting member)
3, 4 Cover body 31, 41 Concealment part 32, 42 Attachment part 33, 43 Light reflection part 6 Pivot part

Claims (6)

  A display unit having a display surface on the front side, a tubular lamp and a case body that accommodates and supports the lamp, a backlight unit disposed on the rear side of the display unit, and an end of the lamp In the display device including the cover body to be concealed, the display unit is connected to the backlight unit so as to be able to contact and separate in the front-rear direction with respect to the backlight unit, and the cover body is provided in the display unit A display device.   The display device according to claim 1, wherein the display unit and the backlight unit have a rectangular shape when viewed from the front, and each of the display unit and the backlight unit has a pivot portion on one side.   3. The display device according to claim 2, wherein each of the one side portions includes a connecting member arranged along each of the one side portions, and each of the connecting members is provided with the pivot portion.   4. A display device according to claim 2, wherein the pivotal support portion is disposed on one end side of the lamp.   The opposed side portions of the display unit and the backlight unit that are opposed to the one side portion are arranged along the opposed side portions, and are in contact with each other to regulate the backward rotation of the display unit. 5. The display device according to claim 2, further comprising: a cover body configured to conceal the other end of the lamp on the rotation restricting member of the display unit.   The cover body includes a concealing portion that conceals the peripheral surface portion of the lamp, an attachment portion attached to the rotation restricting member, and extends from the attachment portion or the concealment portion to the display surface side. The display device according to claim 5, further comprising a light reflecting portion facing the surface of the rotation restricting member facing the lamp.

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