WO2012011328A1

WO2012011328A1 - Display device and television reception device

Info

Publication number: WO2012011328A1
Application number: PCT/JP2011/063053
Authority: WO
Inventors: 達朗黒田
Original assignee: シャープ株式会社
Priority date: 2010-07-21
Filing date: 2011-06-07
Publication date: 2012-01-26

Abstract

The disclosed display device is provided with: a display panel (11) wherein an image is displayed; an illumination device (20) that radiates light to the aforementioned display panel (11); and a holding member (40) that has conductivity and is used when holding the aforementioned display panel (11) and the aforementioned illumination device (20) in an integrated manner. The aforementioned display device (20) has a plurality of light sources (22) and a casing (21) that houses said light sources (22). A control substrate (14) that controls the driving of the display panel (11) is connected to the aforementioned display panel (11). A grounding pattern (17) is provided to the control substrate (14). A substrate fitting section (30) that can fit the aforementioned control substrate (14) is provided to the aforementioned casing (21). A conductive member (35) that contacts the aforementioned grounding pattern (17) along with the fitting of the aforementioned control substrate (14) to the aforementioned substrate fitting section (30) and that contacts the aforementioned holding member (40) is provided to the aforementioned substrate holding section (30).

Description

Display device and television receiver

The present invention relates to a display device and a television receiver.

Digital devices such as televisions, mobile phones, and computers use display devices that include a display panel that displays images. As an example of such a display device, a display device including a display panel and an illumination device that emits light to the display panel is known (for example, Patent Document 1). The display panel and the lighting device are integrally held by a metal bezel or the like. The lighting device includes a light source and a housing that houses the light source, and a control board that controls driving of the display panel is connected to the display panel. The control board is disposed along the outer periphery of the display panel, and is fixed to the side surface of the housing with screws or the like.

In such a display device, harmonics of the digital signal are radiated into the air as electromagnetic noise through the pattern on the control board, and there is a concern that this electromagnetic wave may affect the operation of other electronic devices. Therefore, for example, countermeasures against electromagnetic noise as described in Patent Document 2 may be taken. This countermeasure against electromagnetic wave noise is a method of strengthening the ground of the control board and reducing electromagnetic noise by attaching a gasket (conductive seal) to the ground pattern provided on the control board and attaching the bezel to this gasket. is there.

Japanese Patent Laid-Open No. 2007-222068 JP 2002-107696 A

(Problems to be solved by the invention)
When taking countermeasures against electromagnetic noise as described above, it is necessary to use a gasket having a relatively large thickness in order to ensure that the gasket is in close contact with both sides of the bezel and the control board. However, a gasket having a large thickness is likely to come off when the bezel is assembled, and there is a problem in that the sticking condition is likely to vary, which may result in insufficient contact between the ground pattern of the control board and the bezel. There is. If these contacts are insufficient, the electromagnetic noise cannot be reduced sufficiently, and there has been a desire to strengthen the countermeasure against electromagnetic noise in order to avoid such a situation.

The present invention has been completed based on the above circumstances, and an object thereof is to provide a display device and a television receiver capable of strengthening countermeasures against electromagnetic noise.

(Means for solving problems)
The display device of the present invention includes a display panel on which an image is displayed, a lighting device that irradiates light to the display panel, and a conductive material that is used when the display panel and the lighting device are integrally held. The lighting device includes a plurality of light sources and a housing that houses the light sources, and the display panel is connected to a control board that controls driving of the display panel. The control board is provided with a ground pattern, and the housing is provided with a board fitting portion capable of fitting the control board, and the board fitting portion contacts the holding member. In addition, a conductive member that comes into contact with the ground pattern as the control board is fitted into the board fitting portion is provided.

According to such a configuration, when the control board is fitted into the board fitting portion, the ground pattern of the control board and the conductive holding member are brought into contact with each other via the conductive member. Accordingly, the ground pattern of the control board and the holding member can be brought into contact without using a gasket having a large thickness dimension, so that countermeasures against electromagnetic wave noise can be strengthened.

Moreover, the said board | substrate fitting part is good also as what has an opposing wall which has the clearance gap which can fit the said control board between the wall surfaces of the said housing | casing, and opposes the said wall surface.
Further, the holding member has a portion located on the opposite side of the opposite wall from the housing, and the conductive member is arranged from the side of the opposite wall on which the control board is fitted. It is good also as what continues to the side.

Further, the conductive member may have a substrate side contact portion that protrudes toward the side on which the control substrate is fitted and elastically contacts the ground pattern.
According to such a configuration, since the conductive member reliably contacts the ground pattern of the control board, connection reliability can be improved.

The conductive member may have a ground-side contact portion that protrudes toward the side where the holding member is disposed and elastically contacts the holding member.
According to such a configuration, since the conductive member reliably contacts the holding member, connection reliability can be improved.

Further, the board fitting portion has a convex portion provided so as to protrude from the wall surface of the housing, and the conductive member is a plating layer formed on an outer peripheral surface of the convex portion, and is attached to the control board. May be provided with a concave portion that can be fitted to the convex portion, and the ground pattern may be formed in the concave portion.

Further, the board fitting portion has a convex portion provided to protrude from the wall surface of the housing, and the convex portion is formed of a conductive material and serves also as the conductive member, and the control The substrate may be provided with a concave portion that can be fitted into the convex portion, and the ground pattern may be formed in the concave portion.

The convex portion may be provided with a plurality of elastic pieces rising in a fitting direction with the concave portion so as to be elastically deformable in a direction approaching or separating from each other.
The display panel may be a liquid crystal panel using liquid crystal.
The television receiver of the present invention includes the display device.

(The invention's effect)
ADVANTAGE OF THE INVENTION According to this invention, the display apparatus and television receiver which can strengthen electromagnetic wave noise countermeasure can be provided.

1 is an exploded perspective view showing a schematic configuration of a television receiver according to Embodiment 1. FIG. Exploded perspective view showing schematic configuration of liquid crystal display device Plan view of LCD panel with driver board connected Partially enlarged perspective view of the liquid crystal display device showing a state in which the driver board is attached to the housing Partially enlarged side view of the liquid crystal display device showing a state before the driver board is attached to the housing Partially enlarged side view of the liquid crystal display device showing a state in which the driver board is attached to the housing Partially enlarged sectional view of the liquid crystal display device showing a state in which the ground pattern of the driver board is in contact with the bezel through the conductive member FIG. 9 is a partially enlarged side view showing a state before the driver board is attached to the housing, in the liquid crystal display device according to the second embodiment. Partially enlarged side view of the liquid crystal display device showing a state in which the driver board is attached to the housing Partially enlarged side view of the liquid crystal display device showing a state in which the concave portion of the driver board and the convex portion of the board fitting portion are fitted. FIG. 4 is a partially enlarged perspective view of the housing showing the shape of the displacement allowing portion, and a partially enlarged perspective view of the housing viewed from the inside. Sectional view equivalent to the section at the position AA in FIG. Partially enlarged sectional view of the liquid crystal display device showing a state in which the ground pattern of the driver board is in contact with the bezel through the plating layer

<Embodiment 1>
Embodiment 1 of the present invention will be described below with reference to FIGS. In the present embodiment, a television receiver TV including the liquid crystal display device 10 (display device) is illustrated. As shown in FIG. 1, the television receiver TV includes a liquid crystal display device 10, cabinets Ca and Cb that accommodate the liquid crystal display device 10 sandwiched from the front and back, a power source P, a tuner T for receiving television broadcasts, and the like. And a stand S. The liquid crystal display device 10 is accommodated in the cabinets Ca and Cb in a vertically placed posture with the display surface 11A directed in a substantially vertical direction. Hereinafter, in each component, the lower left side (front side of the television receiver TV, the display surface 11A side) in FIG. 1 will be described as the front side, the upper right side as the back side, the upper side as the upper side, and the lower side as the lower side.

The liquid crystal display device 10 has a horizontally long rectangular shape as a whole, and is a liquid crystal panel (display panel) 11 capable of displaying an image and an external light source that emits light toward the liquid crystal panel 11 as shown in FIG. And a backlight device (illumination device) 20, which are integrally held by a bezel (holding member) 40 or the like.

The liquid crystal panel 11 is interposed between a pair of transparent (translucent)

glass substrates

12 and 13 having a horizontally long rectangular shape, and both the

substrates

12 and 13, and has optical characteristics as voltage is applied. A changing liquid crystal layer (not shown). Both

substrates

12 and 13 are CF substrate 12 on the front side and array substrate 13 on the back side.

The array substrate 13 is provided with switching elements (for example, TFTs) connected to mutually orthogonal source wirings and gate wirings, pixel electrodes connected to the switching elements, and the like. And a color filter in which colored portions such as R, G, and B are arranged in a predetermined arrangement.

The array substrate 13 is formed in a shape that is slightly larger than the CF substrate 12, and a terminal portion (not shown) connected to an external circuit is formed on an edge portion of the peripheral portion that protrudes outward from the peripheral edge of the CF substrate 12. ) Is provided. A pair of front and back polarizing plates (not shown) are disposed on the outer surface sides of the

substrates

12 and 13, respectively.

Around the liquid crystal panel 11, a plurality (three in this embodiment) of driver boards (control boards) 14 are arranged. The driver board 14 and the liquid crystal panel 11 are connected via a plurality of flexible boards 15. Yes.

The flexible substrate 15 includes a flexible thin film substrate on which a wiring pattern (not shown) is printed and a semiconductor chip that functions as a liquid crystal driver integrated circuit. As the flexible substrate 15, TCP (Tape Carrier Package), COF (Chip On Film), SOF (System On Film), or the like is used.

The flexible substrate 15 has a rectangular shape as a whole, and one end side of both ends in the longitudinal direction is electrically connected to the array substrate 13 of the liquid crystal panel 11 and the other end side is electrically connected to the driver substrate 14. . The flexible substrate 15 is arranged so as to be curved along the side surface from the surface of the casing 21 to be described later, and each end thereof is ACF 16 (Anisotropic Conductive) with respect to the terminal portion of the array substrate 13 and the terminal portion of the driver substrate 14. Film: An anisotropic conductive adhesive) is used for pressure connection (see FIG. 7).

The driver board 14 is made of a synthetic resin and has a substantially rectangular plate shape elongated in one direction. An electric component (not shown) such as a capacitor or a resistor is mounted on the board surface and a wiring pattern (not shown). ) Is printed.

The driver substrate 14 is arranged along the edge portion of the peripheral portion of the liquid crystal panel 11 (array substrate 13) where the terminal portion is provided. Two driver boards 14 are provided along the lower side of the pair of long sides of the liquid crystal panel 11, and one is provided along the right side of the pair of short sides toward the display surface 11A. (See FIG. 3).

The driver substrate 14 controls the driving of the liquid crystal panel 11, and supplies a gate signal for driving the liquid crystal panel 11 via the flexible substrate 15 to the liquid crystal panel 11 or the liquid crystal panel 11. 2 is a source driver board that supplies a source signal for driving to the liquid crystal panel 11.

The driver board 14 is disposed at a position separated from the liquid crystal panel 11 in a posture in which the plate surface thereof is substantially perpendicular to the display surface 11A of the liquid crystal panel 11, and is attached to the casing 21 of the backlight device 20. (See FIG. 7).

The driver board 14 is provided with a ground pattern 17 (see FIG. 5). The ground pattern 17 is formed at both ends in the longitudinal direction of the driver board 14 at portions that fit into a board fitting portion 30 described later. The ground pattern 17 is formed on one of the front and back surfaces of the driver board 14 (the face on the side facing the opposing wall 32 described later in a state where the driver board 14 is fitted to the board fitting portion 30).

The backlight device 20 is a so-called direct-type backlight device 20 and is provided immediately below the back surface of the liquid crystal panel 11.
The backlight device 20 includes a plurality of fluorescent lamps (light sources) 22 and a casing 21 that accommodates the fluorescent lamps 22 (see FIG. 2).

The housing 21 has a plate-like bottom member 23 and a wall member 24 that rises from the periphery of the bottom member 23 to the front side, and has a shallow, substantially box shape with the front side opened as a whole.
The bottom member 23 is made of metal and has a substantially rectangular shape that is long in one direction, and the fluorescent lamps 22 are arranged in parallel on the surface of the bottom member 23. The fluorescent lamp 22 has an elongated tubular shape, and is arranged in a state in which the length direction (axial direction) thereof coincides with the longitudinal direction of the bottom member 23, and a large number of the fluorescent lamps 22 are arranged substantially parallel to each other.

The wall member 24 is formed by molding a resin material, and has a substantially rectangular frame shape that is long in one direction as a whole. The wall member 24 includes a wall plate 25 that rises to the front side along the periphery of the bottom member 23, and a ceiling plate 26 that protrudes inward from the rising edge of the wall plate 25 over the entire circumference.

The plate surface of the ceiling plate 26 is substantially parallel to the bottom member 23, and the width dimension of the ceiling plate 26 (projection dimension from the wall plate 25) is substantially constant throughout. The peripheral edge of the liquid crystal panel 11 is placed on the front surface of the ceiling plate 26.

The wall plate 25 has a height dimension (rising dimension from the bottom member 23) in the front and back direction substantially constant throughout. The wall plate 25 is substantially perpendicular to the plate surface of the bottom member 23, and the driver board 14 is attached to the housing 21 in a posture in which the plate surface is along the wall surface 21A of the wall plate 25 (FIG. 4). And FIG. 7).

The housing 21 is provided with a board fitting portion 30 into which the driver board 14 can be fitted. The board fitting portion 30 is formed integrally with the wall member 24 of the housing 21 and is molded at a time when the wall member 24 made of a resin material is manufactured. As shown in FIG. 2, the board fitting portion 30 includes one long side wall portion 24 A (lower long side wall portion 24 A) of the pair of long side wall portions 24 A extending in the longitudinal direction of the wall member 24, and Of the pair of short side wall portions 24B extending in the short direction, one short side wall portion 24B (the short side wall portion 24B on the right side toward the display surface 11A) is provided.

The board fitting portion 30 corresponds to one end of the wall member 24 at a position corresponding to the end in the longitudinal direction of each driver board 14, that is, corresponds to both ends of the two driver boards 14 in the long side wall 24A. The short side wall portion 24B is provided at two locations corresponding to the two end portions of one driver board 14, one at each of the four locations.

As shown in FIG. 7, the board fitting portion 30 includes a bottom wall 31 that protrudes outward from the wall plate 25 of the housing 21, and an opposing wall 32 that rises from the bottom wall 31 to the front side.
The bottom wall 31 protrudes in a substantially vertical direction with respect to the wall plate 25 of the housing 21, and the front side surface (the side on which the driver board 14 is disposed) is a horizontal plane along the periphery of the driver board 14. Has been. The bottom wall 31 is provided with an insertion hole 33 into which a conductive member 35 described later can be inserted. The insertion hole 33 penetrates the bottom wall 31 in the wall thickness direction (front and back direction), and the conductive member 35 can be inserted from the back side. The insertion hole 33 is provided at a substantially central position in the width direction of the bottom wall 31 and at the base of the opposing wall 32.

The opposing wall 32 has a wall shape that rises from the protruding end of the bottom wall 31 (the end opposite to the casing 21) to the front side. The opposing wall 32 is substantially perpendicular to the surface of the bottom wall 31, and when the opposing wall 32 is viewed from the outside of the wall member 24, the opposing wall 32 has a substantially rectangular shape extending in the direction along the circumferential direction of the wall member 24 (see FIG. 5).

A gap is provided between the opposing wall 32 and the wall surface 21A of the housing 21 so that the driver board 14 can be fitted (see FIG. 7). The opposing wall 32 is substantially parallel to the wall surface 21A of the housing 21. And opposing surfaces 34 that face each other. The dimension between the facing surface 34 of the facing wall 32 and the wall surface 21 A of the housing 21 is slightly larger than the thickness of the driver board 14. The opposing surface 34 is connected to the insertion hole 33 without a step, and the opposing surface 34 and the peripheral surface of the insertion hole 33 constitute a flat surface.

The board fitting portion 30 includes a conductive member 35 that contacts the bezel 40 and contacts the ground pattern 17 of the driver board 14 when the driver board 14 is fitted to the board fitting section 30. . The conductive member 35 is a metal piece formed by folding a metal plate into a U shape, and is provided for each board fitting portion 30.

The conductive member 35 has a pair of clamping pieces 36 that elastically clamp the opposing wall 32 and a connecting portion 37 that connects the clamping pieces 36. The pair of sandwiching pieces 36 can be elastically deformed in the approaching / separating direction from each other, and both have a length dimension that reaches the front side from the substantially center position in the front-back direction of the opposing wall 32. In the conductive member 35, one of the pair of sandwiching pieces 36 is inserted into the insertion hole 33, and the other sandwiching piece 36 is placed along the outer surface of the opposing wall 32 (surface opposite to the opposing surface 34). It is attached to the back side of the opposing wall 32 in such a manner. At this time, the connecting portion 37 is disposed along the back side end of the facing wall 32. The conductive member 35 attached to the opposing wall 32 is arranged along the wall surface of the opposing wall 32 from the inner side (side on which the driver board 14 is fitted) to the outer side (side on which the bezel 40 is arranged). Note that the conductive member 35 is mounted at a substantially central position in the width direction of each board fitting portion 30.

The conductive member 35 has a substrate-side contact portion 38 that elastically contacts the ground pattern 17 of the driver substrate 14 and a ground-side contact portion 39 that elastically contacts the bezel 40. The substrate-side contact portion 38 and the ground-side contact portion 39 are formed by projecting a part of each clamping piece 36 outward. In a state where the conductive member 35 is mounted on the opposing wall 32, the board-side contact portion 38 protrudes from the opposing wall 32 to the side where the driver board 14 is fitted, and the ground-side contact portion 39 is disposed from the opposing wall 32 with the bezel 40. It will be in the state of projecting to the side. The substrate-side contact portion 38 and the ground-side contact portion 39 have a cross-sectional mountain shape in which the projecting dimensions gradually increase from the front-side end and the back-side end toward the substantially center position in the front-back direction. In the natural state, the board-side contact portion 38 and the ground-side contact portion 39 have protrusion heights that protrude into the arrangement position of the driver board 14 and the arrangement position of the bezel 40, respectively, and are pressed by the driver board 14 or the bezel 40. Then, it is elastically deformed in the direction in which the protruding height becomes smaller. Then, the driver board 14 fitted to the board fitting part 30 is held in a state where the driver board 14 is separated from the board fitting part 30 by elastic contact with the board side contact part 38 of the conductive member 35.

As shown in FIG. 7, the liquid crystal panel 11 is placed on the front side of the ceiling plate 26 of the housing 21 via a buffer member 41 made of an elastic material (such as a rubber material or a foamed resin material). The liquid crystal panel 11 is held integrally with the backlight device 20 by sandwiching a peripheral portion between the bezel 40 made of a frame-shaped metal member and the casing 21 (ceiling plate 26) of the backlight device 20. . A buffer member 41 is also interposed between the liquid crystal panel 11 and the bezel 40.

The bezel 40 is made of metal, and covers the peripheral portion of the liquid crystal panel 11 along the plate surface of the liquid crystal panel 11. The bezel 40 hangs down from the outer peripheral edge of the cover plate portion 42 to the back side. And a side plate portion 43 extending to the end. The cover plate portion 42 is substantially parallel to the ceiling plate 26 of the housing 21, and the side plate portion 43 is substantially parallel to the wall plate 25 of the housing 21. The side plate portion 43 covers most of the wall plate 25 of the housing 21, is located on the outside of the opposing wall 32 (on the side opposite to the housing 21), and covers the entire outside of the opposing wall 32.

Next, how to take countermeasures against electromagnetic wave noise in the liquid crystal display device 10 of the present embodiment will be described.
First, the driver board 14 is attached to the housing 21. While aligning the driver board 14 so that the ground pattern 17 of the driver board 14 is fitted to the board fitting portion 30 of the casing 21 (see FIG. 5), the driver board 14 is placed on the wall surface 21A of the casing 21. And move to the back side. Then, the driver substrate 14 comes into contact with the substrate side contact portion 38 of the conductive member 35, the substrate side contact portion 38 is elastically deformed toward the opposing wall 32, and the peripheral edge of the driver substrate 14 eventually hits the bottom wall 31. 17 is in elastic contact with the substrate side contact portion 38 of the conductive member 35 (see FIGS. 6 and 7). In this way, the driver board 14 is fitted into the board fitting portion 30, and the mounting operation of the driver board 14 to the housing 21 is completed.

Next, the casing 21 and the liquid crystal panel 11 are assembled together using the bezel 40. The liquid crystal panel 11 is placed on the ceiling plate 26 of the housing 21, and the bezel 40 is installed on the front side. Then, the cover plate portion 42 of the bezel 40 comes into contact with the ground side contact portion 39 of the conductive member 35. When the bezel 40 is fixed to the housing 21 with screws or the like, the cover plate portion 42 of the bezel 40 is moved to the ground side. The bezel 40 and the housing 21 are integrated with each other in a state where the contact portion 39 is elastically contacted. Thus, the ground pattern 17 provided on the driver board 14 is conductively connected to the bezel 40 via the conductive member 35, and the ground of the driver board 14 is strengthened.

When removing the driver board 14 from the housing 21, the driver board 14 may be pulled out along the wall surface 21 A of the housing 21 after removing the bezel 40. At this time, both the ground side contact portion 39 and the substrate side contact portion 38 of the conductive member 35 are elastically restored, so that the driver substrate 14 can be repeatedly attached to and detached from the housing 21.

According to the present embodiment configured as described above, the following effects can be obtained.
The liquid crystal display device 10 of the present embodiment integrally holds a liquid crystal panel 11 on which an image is displayed, a backlight device 20 that irradiates the liquid crystal panel 11 with light, and the liquid crystal panel 11 and the backlight device 20. The backlight device 20 includes a plurality of fluorescent lamps 22 and a casing 21 that accommodates the fluorescent lamps 22. The liquid crystal panel 11 includes the bezel 40 having conductivity. A driver board 14 for controlling the driving of the liquid crystal panel 11 is connected. The driver board 14 is provided with a ground pattern 17, and the housing 21 has a board fitting portion 30 in which the driver board 14 can be fitted. The board fitting part 30 is in contact with the ground pattern 17 as the driver board 14 is fitted to the board fitting part 30. The wood 35 is provided.

Thus, when the driver board 14 is fitted into the board fitting portion 30, the ground pattern 17 of the driver board 14 and the conductive bezel 40 are in contact with each other through the conductive member 35. Therefore, the ground pattern 17 of the driver board 14 and the bezel 40 can be brought into contact with each other without using a gasket having a large thickness dimension, so that countermeasures against electromagnetic wave noise can be strengthened.

The conductive member 35 has a substrate side contact portion 38 that protrudes toward the side on which the driver substrate 14 is fitted and elastically contacts the ground pattern 17. As a result, the conductive member 35 reliably contacts the ground pattern 17 of the driver substrate 14, and the contact state is maintained even if vibrations occur. Therefore, connection reliability can be improved.

Further, the conductive member 35 has a ground side contact portion 39 that protrudes toward the side where the bezel 40 is disposed and elastically contacts the bezel 40. As a result, the conductive member 35 reliably contacts the bezel 40, and the contact state is maintained even if it vibrates or the like, so that the connection reliability can be improved.

<Embodiment 2>
Next, a television receiver TV according to Embodiment 2 embodying the present invention will be described with reference to FIGS.
The television receiver TV of the present embodiment is different from the first embodiment in that the board fitting portion 50 has a convex portion 51 provided to protrude from the wall surface 21 A of the housing 21. In addition, the same code | symbol is attached | subjected to the structure similar to Embodiment 1, and the overlapping description is abbreviate | omitted.

As in the first embodiment, the television receiver TV according to the present embodiment receives the liquid crystal display device 10, the cabinets Ca and Cb that accommodate the liquid crystal display device 10 so as to be sandwiched from the front and back, the power supply P, and the television broadcast. The liquid crystal display device 10 includes a liquid crystal panel 11 and a backlight device 20, and these are integrally held by a bezel 40 or the like.

The bezel 40 includes a cover plate portion 42 and a side plate portion 43 that hangs down from the outer peripheral edge of the cover plate portion 42 to the back side, as in the first embodiment. The side plate portion 43 is provided with an elastic contact piece 43 A that can elastically contact the outer surface of the facing wall 32. The elastic contact piece 43 A is formed by raising a portion of the side plate portion 43 that faces the facing wall 32 to the facing wall 32 side (inner side). The elastic contact piece 43A has a cantilever shape in which the back side end (end opposite to the cover plate part 42) is a free end, and can be elastically deformed in the plate thickness direction (inside and outside direction) of the side plate part 42. The end on the free end side comes into contact with the outer surface of the opposing wall 32.

Similarly to the first embodiment, the backlight device 20 includes a plurality of fluorescent lamps 22 and a casing 21 that accommodates the fluorescent lamps 22, and the driver substrate 14 can be fitted into the casing 21. A board fitting part 50 is provided.

As in the first embodiment, the board fitting portion 50 includes a bottom wall 31 that protrudes outward from the wall plate 25 of the housing 21, and an opposing wall 32 that rises from the bottom wall 31 to the front side. It has a convex portion 51 provided so as to protrude from the wall surface 21A. The bottom wall 31 is different from the first embodiment in that the insertion hole 33 is not formed.

The convex portion 51 is provided at a position between the wall plate 25 of the housing 21 and the opposing wall 32. The protrusion 51 is provided with a shaft protrusion 52 that rises from the bottom wall 31 in the direction along the wall surface 21 A of the housing 21, and an engagement that is provided at the rising end of the shaft protrusion 52 and protrudes from the shaft protrusion 52 to both sides. And a protrusion 53.

When the shaft protrusion 52 is viewed from the outside of the wall member 24, it has a long and narrow rectangular shape in the front and back direction, and its axis is substantially perpendicular to the bottom member 23 of the housing 21. Further, both end surfaces in the width direction when the axial protrusion 52 is viewed from the outside of the wall member 24 are substantially parallel to each other and are substantially perpendicular to the wall surface 21 A of the wall member 24.

The engagement protrusion 53 has a substantially circular shape when viewed from the outside of the wall member 24. The center of the engagement protrusion 53 is located on the axis of the shaft protrusion 52, and the diameter dimension of the engagement protrusion 53 is larger than the width dimension of the shaft protrusion 52.

The peripheral surface of the engaging protrusion 53 has an arc shape, and a substantially half portion on the front side of the peripheral surface comes into contact with a recess 60 of the driver board 14 described later, and a fitting guide surface for guiding the fitting operation. 54, and a substantially half portion on the back side of the peripheral surface of the convex portion 51 is in contact with the concave portion 60 when the convex portion 51 and the concave portion 60 are separated, and is a separation guide surface 55 that guides the separation operation. is there.

The fitting guide surface 54 has an arc shape that gradually protrudes to the side from the front side to the back side (toward the front in the fitting direction of the concave portion 60 with respect to the convex portion 51) and bulges to the side.
The detachment guide surface 55 has an arc shape that gradually protrudes laterally and bulges laterally from the back side to the front side (toward the front in the direction of detachment from the convex portion 51 of the recess 60).

In the convex portion 51, a slit 56 is formed in a portion extending from the front side portion of the shaft protrusion 52 to the entire engagement protrusion 53. The slit 56 extends along the center line of the convex portion 51 in the width direction, and a part of the shaft protrusion 52 and the engagement protrusion 53 are equally divided by the slit 56 in the width direction. The width dimension of the slit 56 is substantially constant over the entire front and back direction.

A pair of elastic pieces 57 rises on both sides of the slit 56. Each elastic piece 57 has a shaft constituting portion 57A constituting a part of the shaft projecting portion 52 and an engaging constituting portion 57B constituting a part of the engaging projecting portion 53. When each elastic piece 57 is viewed from the outside of the wall member 24, the shaft component 57A has a rectangular shape that is long in the front and back directions, and the engagement component 57B has a semicircular shape. The pair of elastic pieces 57 have substantially the same size and the same shape and the same rigidity, and are formed in a symmetrical shape with the slit 56 interposed therebetween. The elastic piece 57 rises in a cantilever shape from the back side to the front side (toward the front in the fitting direction with the recess 60) along the wall surface 21 A of the housing 21. The pair of elastic pieces 57 is provided so as to be elastically deformable in a direction approaching or separating from each other by contact with the concave portion 60. In other words, the width dimension of the convex portion 51 decreases and the width dimension of the convex portion 51 increases. It can be elastically deformed in the direction.

The wall member 24 of the housing 21 is formed with a displacement allowing portion 58 so as to allow the elastic displacement of the elastic piece 57 of the convex portion 51 (see FIG. 11). The displacement allowing portion 58 is provided in a portion of the wall member 24 that faces the pair of elastic pieces 57, and the portion of the wall plate 25 is formed in a window shape that opens in both directions in the plate thickness direction. By providing the displacement allowing portion 58, the convex portion 51 is formed integrally with the casing 21, and the wall surface 21A and the elastic piece 57 are separated from each other.

A plating layer 59 (conductive member) is continuously formed on a portion extending from the outer peripheral surface of the convex portion 51 to the outer surface of the opposing wall 32 (see FIG. 10). The plating layer 59 is formed on the outer peripheral surface of the convex portion 51 and contacts the ground pattern 64 of the driver substrate 14, and the ground side contact portion is formed on the outer surface of the opposing wall 32 and contacts the bezel 40. 66 and a continuous portion 67 formed continuously from the convex portion 51 to the opposing wall 32 and connecting between the substrate-side contact portion 65 and the ground-side contact portion 66.

The board-side contact portion 65 is the entire surface of the outer peripheral surface of the convex portion 51 that contacts the concave portion 60 of the driver substrate 14, specifically, the entire peripheral surface of the engagement protrusion 53 and the side surface of the shaft protrusion 52. Is formed throughout.
The ground side contact portion 66 is formed at a substantially central portion of the outer surface of the opposing wall 32 and forms a substantially rectangular surface that is slightly smaller than the outer surface of the opposing wall 32.

The continuous portion 67 includes a first continuous portion 67A formed on the engaging protrusion 53 of the convex portion 51, a second continuous portion 67B formed on the shaft protrusion 52, and a third continuous portion formed on the opposing wall 32. Part 67C.

67 A of 1st continuous parts are formed in the whole outer surface (surface on the opposite side to the housing | casing 21) of the engagement protrusion 53, and the periphery is the board | substrate side contact part 65 (outer peripheral surface of the engagement protrusion 53). It is connected.
The second continuous portion 67B is formed at a substantially central portion in the width direction of the outer surface of the shaft projecting portion 52. Specifically, the second continuous portion 67B includes both sides of the slit 56, and is formed on a portion of the outer surface of the shaft projection 52 excluding both edges in the width direction, and has a substantially constant width dimension. It is lined up in the direction. The front side end of the second continuous portion 67B is connected to the first continuous portion 67A, and the back side end is connected to the third continuous portion 67C.

The third continuous portion 67 C is formed from the front surface to the outer surface of the facing wall 32. The third continuous portion 67C has a width dimension equivalent to that of the second continuous portion 67B, extends along the outer surface from the surface of the opposing wall 32, and is connected to the substantially central position in the width direction of the ground side contact portion 66. In addition, the width direction dimension of the ground side contact part 66 is larger than the width direction dimension of the third continuous part 67C, and is about three times.

The driver board 14 is provided with a recess 60 that can be fitted to the protrusion 51 (see FIG. 8). The driver board 14 is fixed to the housing 21 by fitting the convex portion 51 and the concave portion 60 together.
One recess 60 is provided at each longitudinal end of each driver board 14. The recess 60 is formed at the edge located on the back side when each driver board 14 is attached to the casing 21 among the peripheral parts of each driver board 14.

The concave portion 60 is cut out in a shape that follows the outer shape of the convex portion 51. Specifically, the recess 60 has a groove recess 61 that is elongated along the outer shape of the shaft protrusion 52 of the protrusion 51, and an engagement that is substantially circular along the outer shape of the engagement protrusion 53. And a recess 62.

The groove recess 61 extends in the short direction of the driver board 14 from the position of one edge extending in the longitudinal direction of the peripheral edge of the driver board 14. One end side of the groove recess 61 in the extending direction opens to the side of the driver substrate 14 (outside in the plate surface direction).

The engagement recess 62 has a substantially circular shape when viewed from the thickness direction of the driver board 14. The center of the engagement recess 62 is located on the axis of the groove recess 61, and the diameter dimension of the engagement recess 62 is larger than the width dimension of the groove recess 61. The engaging recess 62 is provided on one end side in the extending direction of the groove recess 61 so as to communicate with the groove recess 61, and is open to the outside in the plate surface direction of the driver substrate 14 via the groove recess 61.

The portions of the recess 60 located on both sides of the groove recess 61 are elastically deformed in the direction in which the width dimension of the groove recess 61 is widened by contact with the protrusion 51, and the fitting between the recess 60 and the protrusion 51 is completed. When it does, it is set as the elastic deformation | transformation part 63 which can be elastically returned in the direction where the width dimension of the groove recessed part 61 becomes narrow.

The driver board 14 is provided with a ground pattern 64 as in the first embodiment. The ground pattern 64 is formed on the entire peripheral surface forming the recess 60, that is, the entire pair of side surfaces forming the groove recess 61 and the peripheral surface forming the engagement recess 62.

Next, how to take countermeasures against electromagnetic wave noise in the liquid crystal display device 10 of Embodiment 2 will be described.
As in the first embodiment, first, the driver board 14 is attached to the housing 21. While aligning the driver board 14 so that each recess 60 provided in the driver board 14 faces each projection 51 provided in the casing 21 (see FIG. 8), the driver board 14 is attached to the casing 21. It moves to the back side along the wall surface 21A. Then, the back side end of the recessed part 60 of the driver board | substrate 14 contact | abuts to the fitting guide surface 54 of the convex part 51, and the engagement structure part 57B of the convex part 51 approaches little by little in connection with the fitting operation | movement. While elastically deforming, the elastic deformation part 63 of the recessed part 60 elastically deforms little by little in the direction away from each other. Then, the engaging component portion 57 B of the convex portion 51 is smoothly inserted into the groove concave portion 61 of the concave portion 60.

When the driver board 14 is continuously pushed back along the wall surface 21 A of the housing 21, the elastic deformation portion 63 gets over the entire engagement component 57 B (engagement protrusion 53), and the elastic piece 57 and the elastic deformation portion 63. Is restored elastically, and the convex portion 51 and the concave portion 60 are fitted. Thus, the mounting operation of the driver substrate 14 to the housing 21 is completed, and the substrate side contact portion 65 of the plating layer 59 of the convex portion 51 and the ground pattern 64 of the driver substrate 14 are brought into close contact with each other.

Next, as in the first embodiment, when the casing 21 and the liquid crystal panel 11 are assembled together using the bezel 40, the elastic contact pieces 43A provided on the side plate portion 43 of the bezel 40, as shown in FIG. When the bezel 40 is in contact with the ground side contact portion 66 of the plated layer 59 and the bezel 40 is fixed to the housing 21 with screws or the like, the bezel 40 is in a state in which the elastic contact piece 43A elastically contacts the ground side contact portion 66. And the housing 21 are integrated. In this way, the ground pattern 64 provided on the driver board 14 is conductively connected to the bezel 40 through the plating layer 59, and the ground of the driver board 14 is strengthened.

When removing the driver board 14 from the housing 21, the driver board 14 may be pulled out along the wall surface 21 A of the housing 21 after removing the bezel 40 as in the first embodiment. At this time, the detachment operation is smoothly performed by the detachment guide surface 55. In addition, since the elastic piece 57 and the elastic deformation portion 63 are elastically restored, the driver board 14 can be repeatedly attached to and detached from the housing 21.

As described above, according to the present embodiment, the board fitting portion 50 has the convex portion 51 provided to protrude from the wall surface 21 A of the housing 21, and the conductive member 35 is provided on the outer peripheral surface of the convex portion 51. The formed plated layer 59, and the driver substrate 14 is provided with a concave portion 60 that can be fitted to the convex portion 51, and a ground pattern 64 is formed in the concave portion 60.

As a result, similarly to the first embodiment, the ground pattern 64 of the driver board 14 and the bezel 40 can be brought into contact without using a gasket having a large thickness, so that the countermeasure against electromagnetic wave noise can be strengthened. .

Also, the convex portion 51 is provided with a plurality of elastic pieces 57 that rise in the fitting direction with the concave portion 60 so as to be elastically deformable in a direction approaching or separating from each other. Thereby, the contact pressure between the plating layer 59 and the ground pattern 64 and the engagement force between the concave portion 60 and the convex portion 51 can be increased.

Further, since the pair of elastic pieces 57 of the convex portion 51 have the same rigidity, the contact pressure between the plating layer 59 and the ground pattern 64 and the engagement force between the concave portion 60 and the convex portion 51 are exhibited in a well-balanced manner. can do.

<Other embodiments>
The present invention is not limited to the embodiments described with reference to the above description and drawings. For example, the following embodiments are also included in the technical scope of the present invention.

(1) In the first embodiment, the conductive member 35 has a pair of clamping pieces 36 that elastically clamp the opposing wall 32. However, the present invention is not limited to this. For example, the conductive member is arranged in the wall thickness direction of the opposing wall. It is good also as what penetrates.
(2) In the first embodiment, the conductive member 35 is attached to the opposing wall 32 by the one clamping piece 36 sandwiching the opposing wall 32. However, the present invention is not limited to this, and the conductive member 35 is insert-molded on the opposing wall. May be.

(3) In Embodiment 2, the elastic piece 57 of the convex portion 51 is cantilevered. However, the invention is not limited thereto, and the elastic piece of the convex portion may be a double-supported shape in which both ends are connected.
(4) In the second embodiment, the plated layer 59 formed on the outer peripheral surface of the convex portion 51 is the conductive member 35 that connects the ground pattern 64 and the bezel 40. May be formed of a conductive material, and the convex portion may also serve as a conductive member.

TV ... TV receiver, 10 ... Liquid crystal display device (display device), 11 ... Liquid crystal panel (display panel), 14 ... Driver board (control board), 17, 64 ... Ground pattern, 20 ... Backlight device (illumination device) , 21, housing, 21 A, wall surface, 22, fluorescent lamp (light source), 30, 50, substrate fitting portion, 32, facing wall, 35, conductive member, 38, substrate side contact portion, 39, ground side contact portion , 40 ... bezel (holding member), 51 ... convex part, 57 ... elastic piece, 59 ... plated layer, 60 ... concave part

Claims

A display panel on which an image is displayed; an illumination device that emits light to the display panel; and a conductive holding member that is used when the display panel and the illumination device are integrally held. ,
The lighting device includes a plurality of light sources and a housing that houses the light sources,
The display panel is connected to a control board for controlling the driving of the display panel, and the control board is provided with a ground pattern.
The housing is provided with a board fitting portion capable of fitting the control board,
The display device in which the board fitting portion is provided with a conductive member that contacts the holding member and contacts the ground pattern when the control board is fitted to the board fitting portion.
The display device according to claim 1, wherein the board fitting portion has a facing wall facing the wall surface with a gap in which the control board can be fitted between the wall surface of the housing.
The holding member has a portion located on the opposite side of the housing of the opposing wall;
The display device according to claim 2, wherein the conductive member is connected to a side on which the holding member is disposed from a side of the opposing wall where the control board is fitted.
4. The display device according to claim 3, wherein the conductive member has a substrate-side contact portion that protrudes toward a side on which the control substrate is fitted and elastically contacts the ground pattern.
5. The display device according to claim 3, wherein the conductive member has a ground side contact portion that protrudes toward a side where the holding member is disposed and elastically contacts the holding member.
The board fitting portion has a protrusion provided to protrude from the wall surface of the housing,
The conductive member is a plating layer formed on the outer peripheral surface of the convex portion,
The display device according to claim 1, wherein the control board is provided with a concave portion that can be fitted into the convex portion, and the ground pattern is formed in the concave portion.
The board fitting portion has a convex portion provided to protrude from the wall surface of the housing, and the convex portion is formed of a conductive material and serves also as the conductive member.
The display device according to claim 1, wherein the control board is provided with a concave portion that can be fitted into the convex portion, and the ground pattern is formed in the concave portion.
The display device according to claim 6 or 7, wherein a plurality of elastic pieces rising in a fitting direction with the concave portion are provided on the convex portion so as to be elastically deformable in a direction approaching or separating from each other.
The display device according to any one of claims 1 to 8, wherein the display panel is a liquid crystal panel using liquid crystal.
A television receiver comprising the display device according to any one of claims 1 to 11.