JP5282004B2 - Display device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To quickly and easily disassemble a cabinet in maintenance of a backlight. <P>SOLUTION: A display device 1 includes: a panel module 2 having LED modules 21 which illuminate a liquid crystal panel 22; front cabinets 3 which surround the periphery of the display panel of the panel module 2; and a back cabinet 4 which covers the back face side of the panel module 2. The LED modules 21 are arranged around the liquid crystal panel 22, and emitted light is guided by a light-guide plate 23. The panel module 2 is fixed to the front cabinets 3 by means of screws 11 removable from the front face side of the display device 1. A cabinet can be quickly and easily disassembled for maintenance of an LED backlight, from the front face side of the display device. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

  The present invention relates to a display device, and more particularly, to a display device having a configuration in which a backlight for illuminating a display panel is housed in a housing made up of a front cabinet and a back cabinet.

5A and 5B are diagrams for explaining an example of the configuration of the liquid crystal television. FIG. 5A is a schematic rear perspective view of the liquid crystal television, and FIG. 5B is an exploded perspective view of the liquid crystal television.
The liquid crystal television 1 includes a panel module 2 having a display surface for displaying images on the front side, a front cabinet 3 that surrounds the peripheral edge of the panel module 2, a rear cabinet 4 that covers the rear side of the panel module 2, and a panel module 2. And a stand 5 that supports the stand upright.

The panel module 2 includes a liquid crystal panel having a display surface, a backlight unit for illuminating the liquid crystal panel, and electronic components such as a circuit board and a power supply board.
The front cabinet 3 is attached to the panel module 2 so as to surround the peripheral portion of the display surface. The back cabinet 4 is attached to the front cabinet 3 with screws. The back cabinet 4 and the front cabinet 3 constitute a housing for housing the panel module 2.

  The stand 5 has a base portion 51 mounted on a mounting table and the like, and leg portions 52 and 52 erected on the base portion 51, and the upper portions of the leg portions 52 and 52 can be detached from the back side of the panel module 2. The panel module 2 is supported in an upright state.

As described above, liquid crystal televisions that employ light emitting diodes (LEDs) as the light source of the backlight are becoming widespread. The LED, which is a point light source, has a higher degree of freedom in light source layout than a cold cathode tube, and can adjust brightness by subdividing an image display area.
Here, the backlight LED is mounted on a substrate on which a power supply wiring pattern is formed and modularized. In such a configuration, the number of LEDs used for the backlight is increased, and the probability that a failure such as failure or breakage occurs in the LED incorporated in the liquid crystal television is increased. Necessity of maintenance such as replacement occurs.

  For example, Japanese Patent Application Laid-Open No. 2004-228561 discloses a liquid crystal for the purpose of selectively repairing and replacing only a minimum number of LEDs when some LEDs fail or break. A display module is disclosed. The backlight assembly of the liquid crystal display module has a plurality of matrix-like backlight subunits, and each of the backlight subunits includes LEDs arranged in a predetermined arrangement pattern. By adopting such a configuration, when there is a failure or the like in some of the LEDs, it is only necessary to replace the corresponding backlight subunit.

JP 2007-183560 A

  As described above, the number of LEDs used for the backlight is large, and the probability of occurrence of a malfunction such as a failure or breakage increases. In this case, it is necessary to disassemble the back cabinet and front cabin of the liquid crystal television, expose the LED module attached to the panel module 2, and perform processing such as replacement or repair of the defective LED. However, the operation of disassembling the cabinet for performing processing such as LED replacement is complicated, and there is a problem that it takes time and effort for the operator to reach the target LED.

  FIG. 6 is a diagram schematically showing a cross-sectional configuration of a conventional liquid crystal television. Here, the left side in the figure is the lower side when the liquid crystal television 1 stands. In the liquid crystal television 1, a panel module 2 is accommodated in a housing constituted by a front cabinet 3 and a back cabinet 4. The panel module 2 includes an LED module 21 in which LEDs used as a backlight are mounted on a substrate, a liquid crystal panel 22, a light guide plate 23, a substrate 24 on which electronic components for video processing, backlight driving, and the like are mounted, A backlight chassis 25 and the like for holding the substrate 24 and the LED module 21 are provided.

  The back cabinet 4 and the front cabinet 3 are fixed by screws 12. A plurality of screws 12 are attached at predetermined positions. This number also depends on the size of the screen. Further, the backlight chassis 25 and the front cabinet 3 are fixed by screws 11. A plurality of screws 11 are also attached at predetermined positions. A bezel 6 is disposed around the panel module 2.

  The LED module 21 can be turned on by mounting a plurality of LEDs on a substrate, and is attached so as to surround the liquid crystal panel 22. Light emitted from the LEDs of the LED module 21 is guided by the light guide plate 23 to illuminate the liquid crystal panel 22. That is, with this configuration, an edge light type backlight using an LED as a light source is realized. The upper part of the stand 5 is fixed to the back side of the backlight chassis 25 so as to be removable. Screws 13 are used for fixing.

  If any LED in the LED module 21 has a problem such as failure or breakage, and maintenance such as replacement of the LED is necessary, first remove all the screws 12 from the back side of the back cabinet 4, and then the panel module 2 and the front The back cabinet 4 is removed from the cabinet 3. Then, the liquid crystal television 1 is placed on a work table or the like with the screen of the liquid crystal panel 22 facing down, and members and the like on the back side (upper side in FIG. 6) of the panel module are removed. Here, an operation such as removing the screw 13 and removing the stand 5 from the backlight chassis 25 is required.

  And the LED module 21 can be exposed by removing the screw 11 from the back side of the backlight chassis 25 and separating the panel module 2 and the front cabinet 3. If the LED module 21 is exposed, maintenance such as replacement can be performed on a desired LED or the like. Thus, it has a structure that requires a complicated disassembly operation before reaching the target LED.

  The present invention has been made in view of the above circumstances, and in a display device having a configuration in which a backlight is accommodated in the cabinet and illuminates the display panel, the cabinet is disassembled for performing maintenance of the backlight. It is an object of the present invention to provide a display device that can quickly and easily perform the above.

In order to solve the above problems, a first technical means of the present invention surrounds the periphery of a display panel having a display panel having a display surface on the front surface and a backlight for illuminating the display panel, and the display panel of the panel module. In a display device that includes a front cabinet and a back cabinet that covers the back side of the panel module, and the panel module is housed in a housing made of the back cabinet and the front cabinet, the backlight is formed by LEDs around the display panel. The panel module is fixed to the housing by a fixing member that has a backlight light source and can be removed from the front side of the display device.

  The second technical means is characterized in that, in the first technical means, the fixing member fixes the front cabinet and the panel module.

  According to a third technical means, in the first technical means, the casing includes a panel module holding member fixed between the front cabinet and the back cabinet, and the fixing member is a panel module holding member. And the panel module are fixed.

  According to a fourth technical means, in the third technical means, the back cabinet, the front cabinet, and the panel module holding member are fixed by the second fixing member.

A fifth technical means is the third technical means, and a back cabinet and panel module holding member is fixed by the second fixing member, front cabinet is fixed to the back cabinet by the third fixing member It is characterized by that.

  According to the present invention, in a display device configured to house a backlight in a cabinet and illuminate a display panel, the cabinet can be quickly and easily disassembled for maintenance of the backlight. A display device can be provided.

It is a figure which shows typically the example of a cross-sectional structure of the liquid crystal television applied as a display apparatus which concerns on this invention. It is a figure for demonstrating the procedure at the time of performing maintenance of LED of a liquid crystal television, and shows the state which looked at the liquid crystal television from front diagonally. It is a figure which shows typically the other example of the cross-sectional structure of the liquid crystal television applied as a display apparatus which concerns on this invention. It is a figure which shows typically the further another example of the cross-sectional structure of the liquid crystal television applied as a display apparatus which concerns on this invention. It is a figure for demonstrating an example of a structure of a liquid crystal television. It is a figure which shows typically the cross-sectional structure of the conventional liquid crystal television.

(Embodiment 1)
FIG. 1 is a diagram schematically showing a cross-sectional configuration example of a liquid crystal television applied as a display device according to the present invention, and shows a first embodiment of the present invention. Here, the left side in the figure is the lower side when the liquid crystal television 1 stands. In the liquid crystal television 1, a panel module 2 is accommodated in a housing constituted by a front cabinet 3 and a back cabinet 4. The panel module 2 includes an LED module 21 in which LEDs used as a backlight are mounted on a substrate, a liquid crystal panel (display panel) 22, a light guide plate 23, and electronic components for video processing, backlight driving, and the like. And a backlight chassis 25 for holding the substrate 24, the substrate 24, the LED module 21, and the like. Further, on the back side of the backlight chassis 25, bosses 26 having a predetermined height are disposed at a plurality of locations. The boss 26 is for allowing the panel module 2 with the back cabinet 4 removed to be placed on a work table or the like.

  The LED module 21 can be turned on by mounting a plurality of LEDs on a substrate, and is attached so as to surround the liquid crystal panel 22. Light emitted from the LEDs of the LED module 21 is guided by the light guide plate 23 to illuminate the liquid crystal panel 22. In other words, the configuration of this example realizes an edge light type backlight using LEDs as light sources. Further, the upper portion of the leg portion of the stand 5 is fixed to the back side of the backlight chassis 25 so as to be removable. Screws 13 are used for fixing.

  The backlight cabinet 4 and the front cabinet 3 are fixed by screws 12. A plurality of screws 12 are attached at predetermined positions. This number also depends on the size of the screen. Further, the backlight chassis 25 of the panel module 2 and the front cabinet 3 are fixed by screws 11. A plurality of screws 11 are also attached at predetermined positions. A bezel 6 is disposed around the panel module 2.

  In the embodiment according to the present invention, the screws 11 for fixing the front cabinet 3 and the panel module 2 are removable from the front side of the display device. The screw 11 corresponds to the fixing member of the present invention that can be removed from the front side of the display device. Thereby, the front cabinet 3 and the back cabinet 4 can be disassembled easily, and the target LED can be easily exposed. That is, it becomes possible to quickly and easily disassemble the cabinet for performing the maintenance of the LED backlight.

  FIG. 2 is a diagram for explaining a procedure for performing maintenance of the LED of the liquid crystal television, and schematically shows a state in which the liquid crystal television is viewed from the front side. When a failure such as failure or damage occurs in any LED of the LED module 21 and maintenance such as replacement of the LED becomes necessary, first, all the screws 12 are removed from the back side of the back cabinet 4, and the panel module 2 and the front The back cabinet 4 is removed from the cabinet 3. FIG. 2A shows a state where the back cabinet 4 is removed at this time.

  Then, all the screws 11 are removed from the front side of the display device, and the front cabinet 3 is removed from the panel module 2. In the example of FIG. 2A, the screws 11 are provided at the four corners of the front cabinet 3. However, the number and arrangement positions of the screws 11 are merely examples, and the size of the screen, the panel module, It can be changed as appropriate according to the specifications of the cabinet.

FIG. 2B shows a state where the front cabinet 3 is removed from the panel module 2. The LED module 21 arranged on the panel module 2 can be exposed by removing the front cabinet 3 from the panel module 2 and removing the bezel 6 (not shown in FIG. 2). If the LED module 21 is exposed, maintenance such as replacement can be performed on a desired LED or the like. The arrow in FIG. 2C shows an image when the LED is removed.
In the embodiment according to the present invention, since the screw 11 fixing the front cabinet 3 to the panel module 2 can be removed from the front side, there is a stand 5 or the like that obstructs access to the LED as in the prior art. There is no need to remove the screw 11 from the rear side of the panel module 2, and the workability is greatly improved.

  In the present embodiment, a boss 26 is provided on the back side of the backlight chassis 25 so that the panel module 2 in the state shown in FIG. (See FIG. 1). Normally, when the back cabinet 4 is removed from the panel module 2 to which the front cabinet 3 is attached, the operation is performed with the display device standing up. Then, after removing the back cabinet 4, the display device is laid down on the work table and maintenance work such as LED replacement is performed. This is to improve workability.

  In this case, in this embodiment, since the screw 11 is removed from the front side of the display device, the display screen of the liquid crystal panel is placed so as to face upward. At this time, since the back cabinet 4 is removed, the back side of the panel module 2 is the lower side. Since the substrate 24 and other electronic components are disposed on the back side of the panel module 2, if they are in direct contact with the work table, stress is exerted due to the weight of the display device, which has an adverse effect. Since there is a possibility that it will occur, bosses 26 having a predetermined height are arranged at a plurality of locations on the back side of the backlight chassis 25 so as not to apply stress to the substrate 24 and the like. The height of the boss 26 only needs to be a height at which the substrate 24 or the like does not contact the work table surface when the display device is placed with the substrate or the like 24 facing down.

  As described above, according to the embodiment of the present invention, the screw 11 for attaching the front cabinet 3 to the panel module 2 is configured to be removable from the front side (display screen side) of the display device. LED to be exposed can be easily exposed. That is, it becomes possible to quickly and easily disassemble the cabinet for performing the maintenance of the LED backlight.

(Embodiment 2)
FIG. 3 is a diagram schematically showing another example of a cross-sectional configuration of a liquid crystal television applied as a display device according to the present invention, and shows a second embodiment of the present invention. In FIG. 3, the same elements having the same functions as those in FIG. 1 are denoted by the same reference numerals as those in FIG.
The present embodiment is characterized in that the panel module holding member 7 is used to fix the panel module 2. The panel module holding member 7 can be configured as a metal fitting.

  In the case of the first embodiment, since the head portion of the screw 11 is exposed on the front surface side of the front cabinet 3, the design quality may be lowered. On the other hand, in this embodiment, the panel module holding member 7 is provided inside the front cabinet 3 (on the back side of the display device), and the panel module holding member 7 and the backlight chassis 25 of the panel module 2 are attached to the screw 11. To fix. This screw 11 can be removed from the front side of the display device, and corresponds to a fixing member in the present invention.

The back cabinet 4 and the front cabinet 3 are fixed by screws 12. At this time, a part of the panel module holding member 7 is sandwiched and fixed between the back cabinet 4 and the front cabinet 3. Accordingly, the back cabinet 4, the front cabinet 3, and the panel module holding member 7 are integrally fixed by the screws 12. The screw 12 corresponds to the second fixing member of the present invention.
Then, the backlight chassis 25 is fixed to the panel module holding member 7 by the screws 11, and the panel module 2 is fixed. Since the screw 11 fixes the panel module 2 using the panel module holding member 7 inside the front cabinet 3, the screw 11 is not visible from the front side of the front cabinet 3.

  In the configuration of the present embodiment, when a failure such as failure or breakage occurs in any LED of the LED module 21 and maintenance such as replacement of the LED becomes necessary, first, all the screws 12 are removed from the back side of the back cabinet 4. The back cabinet 4 is removed and the front cabinet 3 is removed from the panel module 2. Then, all the screws 11 are removed from the front side of the display device, and the panel module holding member 7 is removed from the panel module 2. When the screw 11 is removed, the panel module 2 can be placed on a work table or the like with the back side of the panel module 2 down due to the presence of the boss 26.

If the panel module holding member 7 is removed from the panel module 2 and the bezel 6 is removed, the LED module 21 arranged in the panel module 2 can be exposed. If the LED module 21 is exposed, maintenance such as replacement can be performed on a desired LED or the like.
As described above, according to the embodiment of the present invention, the screws 11 for fixing the panel module 2 to the cabinets 3 and 4 via the panel module holding member 7 are provided on the front side (display screen side) of the display device. Therefore, the target LED can be easily exposed. That is, it becomes possible to quickly and easily disassemble the cabinet for performing the maintenance of the LED backlight.

(Embodiment 3)
FIG. 4 is a diagram schematically showing still another example of a cross-sectional configuration of a liquid crystal television applied as a display device according to the present invention, and shows a third embodiment of the present invention. 4, the same elements having the same functions as those in FIG. 1 are denoted by the same reference numerals as those in FIG.
The present embodiment is characterized in that the back cabinet 4 is screwed to the bezel (cover) 6 and the panel module 2 is fixed to the bezel 6. The front cabinet 3 is fixed to the back cabinet with screws.

  In the present embodiment, the bezel 6 provided as a cover for the liquid crystal panel 22 is expanded inside the front cabinet 3 (on the back side of the display device), and the bezel 6 and the backlight chassis 25 of the panel module 2 are connected by screws 11. I try to fix it. That is, the bezel 6 of this embodiment corresponds to another form of the panel module holding member of the present invention. This screw 11 can be removed from the front side of the display device.

The back cabinet 4 is fixed to the bezel 6 with screws 12. The screw 12 corresponds to the second fixing member of the present invention, but in the present embodiment, unlike the second embodiment, the screw 12 fixes the back cabinet 4 and the bezel 6 (panel module holding member). doing. Then, the backlight chassis 25 is fixed to the bezel 6 by the screws 11, and the panel module 2 is fixed.
The front cabinet 3 is fixed to the back cabinet 4 with screws 14. The screw 14 corresponds to a third fixing member of the present invention, and fixes the front cabinet 3 to the back cabinet 4 from the side surface side of the display device. The liquid crystal panel 22 side of the front cabinet 3 is configured to be fitted and fixed to the bezel 6.

  Since the screw 11 for fixing the panel module 2 fixes the panel module 2 to the bezel 6 inside the front cabinet 3, the screw 11 is not visible from the front side of the front cabinet 3.

  In the configuration of the present embodiment, when a failure such as failure or breakage occurs in any LED of the LED module 21 and maintenance such as replacement of the LED becomes necessary, first, the screw 14 is removed, and the front cabinet 3 is removed. Remove from the display. Next, all the screws 12 are removed from the back side of the back cabinet 4 and the back cabinet 4 is removed. Then, all the screws 11 are removed from the front side of the display device, and the bezel 6 is removed from the panel module 2. When the screw 11 is removed, the panel module 2 can be placed on a work table or the like with the back side of the panel module 2 down due to the presence of the boss 26.

If the bezel 6 is removed from the panel module 2, the LED module 21 arranged in the panel module 2 can be exposed. If the LED module 21 is exposed, maintenance such as replacement can be performed on a desired LED or the like.
As described above, according to the embodiment of the present invention, the screw 11 for fixing the panel module 2 is configured to be removable from the front side (display screen side) of the display device. Can be exposed to. That is, it becomes possible to quickly and easily disassemble the cabinet for performing the maintenance of the LED backlight.

DESCRIPTION OF SYMBOLS 1 ... LCD television, 2 ... Panel module, 3 ... Front cabinet, 4 ... Back cabinet, 5 ... Stand, 6 ... Bezel, 7 ... Panel module holding member, 11 ... Screw, 12 ... Screw, 13 ... Screw, 14 ... Screw , 21 ... LED module, 22 ... liquid crystal panel, 23 ... light guide plate, 24 ... substrate, 25 ... backlight chassis, 26 ... boss, 51 ... base part, 52, 52 ... leg part.

Claims (5)

A display panel having a display surface on the front surface, a panel module having a backlight for illuminating the display panel, a front cabinet surrounding the periphery of the display panel of the panel module, and a back cabinet covering the back side of the panel module In a display device in which the panel module is housed in a housing composed of the back cabinet and the front cabinet,
The backlight has a backlight light source by LEDs around the display panel, and the panel module is fixed to the casing by a fixing member that can be removed from the front side of the display device. Display device.   The display device according to claim 1, wherein the fixing member fixes the front cabinet and the panel module.   The display device according to claim 1, wherein the housing includes a panel module holding member fixed between the front cabinet and the back cabinet, and the fixing member includes the panel module holding member and the panel. A display device characterized in that the module is fixed.   The display device according to claim 3, wherein the back cabinet, the front cabinet, and the panel module holding member are fixed by a second fixing member. The display device according to claim 3, wherein the back cabinet and said panel module retaining member is fixed in the second fixing member, wherein the front cabinet is fixed to the back cabinet by the third fixing member A display device characterized by that.

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