JP2012054211A - Lighting device, display device, and television set - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lighting device capable of facilitating mounting work of a board cover.SOLUTION: The backlight device (lighting device) 12 includes a cold-cathode tube (light source) 18, a chassis 14 for storing the cold-cathode tube 18, a control board (circuit board) 23 mounted on the chassis 14, the board cover 24 mounted on the chassis 14 and arranged so as to cover the control board 23, a reinforcing section 25 which is a reinforcement section arranged on the chassis 14, and a second plate section 25b being a positioning section, which is integrated with the reinforcing section 25 and positions the board cover 24.

Description

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

  Conventionally, a liquid crystal panel used for a liquid crystal display device such as a liquid crystal television does not emit light, and thus has a backlight device as a separate illumination device. This backlight device is well known to be installed on the back side of the liquid crystal panel (opposite to the display surface). The backlight device is installed on the inner surface of the bottom plate of the chassis and the chassis having a shape opened on the liquid crystal panel side. A plurality of light sources (for example, cold-cathode tubes and LEDs), and an optical member (such as a diffusion plate) that is arranged to cover the opening of the chassis and efficiently emits light emitted from the light sources to the liquid crystal panel side. And a light reflection sheet that is laid in the chassis and reflects light from the light source toward the optical member and the liquid crystal panel.

  In addition, a circuit board for driving a liquid crystal display device is attached to the chassis, and a chassis is known in which a board cover is attached to cover the circuit board. Such a board cover and a circuit board are attached to the chassis by attachment means such as screws. As an example of such a liquid crystal display device configured to fix a circuit board with screws, one described in Patent Document 1 below is known.

Japanese Patent Laid-Open No. 2007-180751

  By the way, when attaching the board cover to the chassis, there is a problem in that workability is not good because an operator needs to perform an operation such as turning the screw while holding the board cover in a predetermined position. Further, if the substrate cover interferes with the circuit board during the mounting operation, the circuit board may be damaged.

  The present invention has been completed based on the above-described circumstances, and an object thereof is to facilitate the mounting operation of the substrate cover.

  The illumination device of the present invention includes a light source, a chassis in which the light source is accommodated, a circuit board attached to the chassis, a board cover attached to the chassis and arranged to cover the circuit board, and the chassis And a positioning unit that is provided integrally with the functional unit and positions the substrate cover.

According to such a configuration, the board cover is attached to the chassis to which the circuit board is attached so as to cover the circuit board. When the substrate cover is attached, the substrate cover is positioned by the positioning portion provided integrally with the function portion, so that the workability related to the attachment is excellent. Further, since the board cover is positioned, it is possible to prevent the board cover from interfering with the circuit board during the mounting operation, and it is possible to prevent the circuit board from being damaged.
On top of that, since the positioning part is integrally provided in the function part which is an existing structure provided in the chassis, the function part has a positioning function of the substrate cover in addition to the original function. As compared with the case where a dedicated part having a positioning function is provided separately from the functional part, the structure can be simplified.

The following configuration is preferable as an embodiment of the present invention.
(1) The positioning portion regulates movement of the substrate cover in at least one direction along the plate surface of the circuit board. In this way, the positioning of the board cover arranged so as to cover the circuit board is restricted by the movement of the positioning unit in at least one direction along the plate surface of the circuit board. In addition to excellent workability, it is possible to suitably prevent interference between the substrate cover and the circuit board.

(2) The board cover is attached to the chassis along a direction orthogonal to the plate surface of the circuit board. If it does in this way, the board | substrate cover attached along the direction orthogonal to the board surface of a circuit board can be appropriately positioned with respect to a circuit board by a positioning part.

(3) The board cover is provided with a piece projecting along the mounting direction with respect to the chassis and having a side surface addressed to the positioning part. If it does in this way, positioning of a substrate cover to a circuit board can be aimed at by addressing a side of one part to a positioning part.

(4) The positioning portion and the piece portion are provided with a locking structure that restricts the substrate cover from moving in a direction opposite to the mounting direction by being locked to each other. If it does in this way, it can prevent that a board | substrate cover remove | deviates from the direction opposite to an attachment direction from a chassis by the latching structure provided in the positioning part and the piece part. In addition to the positioning function described above for the positioning part and the piece part, it can also have a function of preventing the board cover from being removed. Therefore, if the positioning part and the piece part are provided with a retaining structure separately. Compared to, it is possible to further simplify the structure.

(5) The board cover is attached to the chassis along the plate surface of the circuit board. If it does in this way, the board cover attached along the board surface of a circuit board can be appropriately positioned with respect to a circuit board by a positioning part.

(6) The functional portion is provided with a groove portion that opens along the attachment direction of the substrate cover with respect to the chassis and that can receive the substrate cover, and the groove portion includes the groove edge along the attachment direction. A positioning part is configured. In this way, the movement of the substrate cover in the direction intersecting the attachment direction can be restricted by the positioning portion formed by the groove edge along the attachment direction in the groove portion, thereby positioning the substrate cover.

(7) A stopper portion that restricts movement of the substrate cover in the attachment direction by striking the substrate cover at a depth side in the attachment direction with respect to the substrate cover of the groove edge of the groove portion. Is provided. In this way, when the substrate cover received in the groove portion is pushed in the attachment direction, the stopper portion abuts against the substrate cover, thereby restricting further movement in the attachment direction. Thereby, the substrate cover can be positioned in the mounting direction.

(8) At least when mounting the board cover, the chassis is arranged so that the plate surface of the circuit board is along the vertical direction, and the mounting direction of the board cover is from the upper side to the lower side of the vertical direction. The stopper portion is arranged below the vertical direction with respect to the substrate cover. In this way, when the board cover received in the groove is moved from the upper side in the vertical direction to the lower side with respect to the chassis in order to attach the board cover, the stopper part arranged on the lower side in the vertical direction When the substrate cover is abutted, further movement is restricted. As described above, since work can be performed using gravity when the substrate cover is attached, workability is extremely excellent.

(9) The board cover moves in the direction opposite to the mounting direction by engaging the board cover on the near side of the mounting direction with respect to the board cover among the groove edges of the groove portion. A retaining portion for restricting the movement is provided. If it does in this way, when the board cover received in the groove part is pushed in the attachment direction and reaches a predetermined position, the retaining part is locked to the board cover, so that the board cover moves in the direction opposite to the attachment direction. Is regulated. Thereby, it is possible to prevent the substrate cover from being removed while positioning the substrate cover.

(10) The retaining portion includes an elastic locking piece that can be elastically locked to the substrate cover. In this way, when the substrate cover is attached to the chassis, the elastic locking piece that forms the retaining portion is elastically locked to the substrate cover, thereby preventing the substrate cover from being detached.

(11) The chassis is provided with a reinforcing portion extending along the side thereof, and the functional portion includes the reinforcing portion. In this way, the chassis can be reinforced by the reinforcing portion extending along the side of the chassis, and the positioning portion is integrally provided by using the reinforcing portion as a functional portion, so that the board cover is provided. These positioning functions can be used together.

(12) A pair of the reinforcing portions is arranged in parallel with each other with a space therebetween, and the circuit board and the substrate cover are both arranged between the pair of reinforcing portions. If it does in this way, a circuit board and a substrate cover can be attached using the space secured between a pair of reinforcement parts.

(13) A support member that supports the chassis is provided, and the support member is attached to the reinforcing portion. In this way, since the reinforcing portion has a function of attaching the support member in addition to the positioning function, the structure can be further simplified.

(14) An exterior member that accommodates the chassis that accommodates the light source and that houses the circuit board and the substrate cover is provided, and the chassis includes a holding portion for retaining the exterior member. The functional unit is composed of the holding unit. In this way, the exterior member that accommodates the chassis can be held by the holding portion, and the positioning portion is provided integrally with the holding portion as a functional portion, so that the positioning function of the substrate cover is also provided. be able to.

(15) The chassis is provided with a vent hole for allowing the inside and outside air to circulate, and the functional part is composed of the vent hole, and at least a part of a hole edge in the vent hole is the above-mentioned vent hole. The positioning part is configured, and the board cover is further provided with an insertion part which is inserted into the vent hole and abutted against the positioning part. If it does in this way, since the air inside and outside of a chassis can be distribute | circulated by a vent hole, the heat emitted from the light source can be dissipated. The positioning function of the substrate cover can be provided together by providing the positioning part integrally with the vent hole as a functional part.

  Next, in order to solve the above problem, a display device of the present invention includes the above-described illumination device and a display panel that performs display using light from the illumination device.

  According to such a display device, since the illumination device that supplies light to the display panel is excellent in workability related to assembly, the manufacturing efficiency is improved and the manufacturing cost is reduced.

  An example of the display panel is a liquid crystal panel. Such a display device can be applied as a liquid crystal display device to various uses such as a display of a television or a personal computer, and is particularly suitable for a large screen.

  According to the present invention, the mounting operation of the substrate cover can be facilitated.

1 is an exploded perspective view showing a schematic configuration of a television receiver according to Embodiment 1 of the present invention. The exploded perspective view which shows schematic structure of the liquid crystal display device with which a television receiver is equipped Sectional drawing which shows the cross-sectional structure along the short side direction of a liquid crystal display device Sectional drawing which shows the cross-sectional structure along the long side direction of a liquid crystal display device Bottom view showing the arrangement of the reinforcing part, control board, board cover, inverter board, and stand in the chassis included in the liquid crystal display device Sectional drawing which shows the cross-sectional structure along the short side direction of a liquid crystal display device, Comprising: The sectional view which expanded the control board, the board | substrate cover, and the reinforcement part Vii-vii sectional view of FIG. Sectional drawing which shows the cross-sectional structure along the short side direction of a liquid crystal display device, Comprising: The state before attaching a substrate cover with respect to a chassis Sectional drawing which shows the cross-sectional structure along the short side direction of the liquid crystal display device which concerns on Embodiment 2 of this invention. Sectional drawing which shows the cross-sectional structure along the short side direction of a liquid crystal display device, Comprising: The state before attaching a substrate cover with respect to a chassis The bottom view which shows the state which attached the substrate cover to the chassis with which the liquid crystal display device which concerns on Embodiment 3 of this invention is equipped. Sectional view taken along line xii-xii in FIG. Sectional view taken along line xiii-xiii in FIG. Bottom view showing the state before attaching the board cover to the chassis Xv-xv sectional view of FIG. The bottom view which shows the state which attached the substrate cover to the chassis with which the liquid crystal display device which concerns on Embodiment 4 of this invention is equipped. Xvii-xvii sectional view of FIG. Xviii-xviii sectional view of FIG. The bottom view which shows the state which attached the substrate cover to the chassis with which the liquid crystal display device which concerns on Embodiment 5 of this invention is equipped. Xx-xx line sectional view of FIG. Bottom view showing the state before sliding when attaching the board cover Xxii-xxii cross-sectional view of FIG. The bottom view which shows the state which attached the substrate cover to the chassis with which the liquid crystal display device which concerns on Embodiment 6 of this invention is equipped. Xxiv-xxiv sectional view of FIG. Xxv-xxv sectional view of FIG. The bottom view which shows the state which attached the substrate cover to the chassis with which the liquid crystal display device which concerns on Embodiment 7 of this invention is equipped. Xxvii-xxvii sectional view of FIG. Xxviii-xxviii line cross-sectional view of FIG. The bottom view which shows the state which attached the board | substrate cover to the chassis with which the liquid crystal display device which concerns on Embodiment 8 of this invention is equipped. Xxx-xxxi line cross section of Fig. 29 Xxxi-xxxi sectional view of FIG. The bottom view which shows the state which attached the board | substrate cover to the chassis with which the liquid crystal display device which concerns on Embodiment 9 of this invention is equipped. Xxxiii-xxxiii sectional view of FIG.

<Embodiment 1>
A first embodiment of the present invention will be described with reference to FIGS. In this embodiment, the liquid crystal display device 10 is illustrated. In addition, a part of each drawing shows an X axis, a Y axis, and a Z axis, and each axis direction is drawn to be a direction shown in each drawing. Among these, the Y-axis direction coincides with the vertical direction, and the X-axis direction coincides with the horizontal direction. In addition, unless otherwise noted, the vertical direction is used as a reference for upper and lower descriptions. Also, the upper side shown in FIGS. 3 and 4 is the front side, and the lower side shown in FIGS. 3 and 4 is the back side.

As shown in FIG. 1, the television receiver TV according to this embodiment includes a liquid crystal display device 10, front and back cabinets Ca and Cb that are accommodated so as to sandwich the liquid crystal display device 10, a power source P, and a tuner T. It is prepared for. The liquid crystal display device (display device) 10 has a horizontally long rectangular shape (rectangular shape, longitudinal shape) as a whole, and is accommodated in a vertically placed state. The television receiver TV is supported by a stand (support member) 26 described later in a state where the display surface of the liquid crystal display device 10 is along the vertical direction (Y-axis direction).
Note that “the display surface of the liquid crystal display device 10 is along the vertical direction” as referred to in the present embodiment is not limited to an aspect in which the display surface of the liquid crystal display device 10 is parallel to the vertical direction, but from a direction along the horizontal direction. Also means that it is installed in a direction that is relatively along the vertical direction, and includes, for example, those that are inclined by 0 ° to 45 °, preferably 0 ° to 30 ° with respect to the vertical direction.

  As shown in FIG. 2, the liquid crystal display device 10 includes a liquid crystal panel 11 that is a display panel and a backlight device (illumination device) 12 that is an external light source, which are integrated by a frame-like bezel 13 or the like. Is supposed to be retained. Next, the liquid crystal panel 11 and the backlight device 12 constituting the liquid crystal display device 10 will be sequentially described.

  As shown in FIG. 2, the liquid crystal panel 11 has a horizontally long (longitudinal) rectangular shape in a plan view, and a pair of glass substrates are bonded together with a predetermined gap therebetween, and between the two glass substrates. The liquid crystal is sealed. One glass substrate (array substrate) is provided with a switching element (for example, TFT) connected to a source wiring and a gate wiring orthogonal to each other, a pixel electrode connected to the switching element, and an alignment film. On the other glass substrate (CF substrate), there are a color filter and a counter electrode in which colored portions such as R (red), G (green), and B (blue) are arranged in a predetermined arrangement, an alignment film, and the like. Is provided. A polarizing plate is disposed on the outside of both substrates.

  Among these, a terminal portion led from the source wiring and the gate wiring is formed at one end portion in the short side direction (Y-axis direction) of one glass substrate, more specifically, at the lower end portion in the vertical direction. One end side of the flexible substrate FB is connected to the terminal portion. The flexible substrate FB is configured such that a conductive path is printed on a thin film having flexibility and a driver such as an LSI chip is mounted. A drive control board DB for controlling the drive of the liquid crystal panel 11 is connected to the other end side of the flexible board FB. The flexible substrate FB is pressure-bonded to one glass substrate or the drive control substrate DB via an ACF (Anisotropic Conductive Film). The drive control board DB is further connected to a control board 23 which will be described later, and an image signal supplied from the drive control board DB can be supplied to the source wiring and the gate wiring of the liquid crystal panel 11 through the flexible substrate FB.

  As shown in FIGS. 2 and 3, the backlight device 12 is a so-called direct type in which a light source is arranged directly under the back surface of the liquid crystal panel 11, and is open to the front side (light emission side, liquid crystal panel 11 side). A chassis 14 having a substantially box shape is provided. On the front side (front side) of the chassis 14, there are a reflection sheet 15 laid along the inner surface, a plurality of optical members 16 arranged so as to cover the opening 14 b of the chassis 14, and an optical member 16. A frame 17 that can be held, a plurality of cold-cathode tubes (light sources) 18 accommodated in parallel in the chassis 14, a lamp clip 19 that holds a central portion of the cold-cathode tube 18, and the cold-cathode tube 18 A connector 22 for electrically connecting the cold cathode tube 18 to the inverter board 21 and a lamp holder 20 that shields each end of the cold cathode tube 18 and has light reflectivity. And are provided. Furthermore, on the back side (back side) of the chassis 14, an inverter board (light source drive board) 21 that supplies driving power to the cold cathode tube 18 via the connector 22, the drive control board DB and the flexible board FB described above. A control board (circuit board) 23 for supplying a liquid crystal driving signal to the liquid crystal panel 11 through the board, a board cover 24 covering the control board 23, and a reinforcing part (functional part) 25 having a function of reinforcing the chassis 14 and the like. And a stand (supporting member) 26 that supports the chassis 14.

  The chassis 14 is made of a metal such as aluminum, and as shown in FIGS. 2 to 4, as in the liquid crystal panel 11, it has a horizontally long rectangular shape (longitudinal shape in which the long side direction coincides with the X-axis direction). A sheet metal is formed into a shallow, substantially box shape comprising a bottom plate 14a, and a pair of outer edges 14c that rise from a pair of outer ends on the long side and a pair of outer ends on the short side and are folded back in a substantially U shape. Has been. The bottom plate 14a has a plate surface parallel to the display surface of the liquid crystal display device 10, the long side direction of the bottom plate 14a matches the X-axis direction of each drawing, and the short side direction matches the Y-axis direction. ing. The bottom plate 14a is arranged opposite to the back side of the cold cathode tube 18, in other words, arranged on the opposite side of the cold cathode tube 18 from the light emitting side. A plurality of attachment holes 14d for attaching the connector 22 are formed in the bottom plate 14a at corresponding positions (FIG. 4). On the bottom plate 14a, a mounting base portion 14e for mounting the inverter board 21 and the control board 23 is formed in a form protruding in a plurality of back sides. The mounting base portion 14e is formed by, for example, drawing the bottom plate 14a to bulge the bottom plate 14a partially toward the back side (FIG. 4). In addition, the reinforcement part 25 mentioned later is being fixed to the attachment state by welding with respect to the baseplate 14a.

  As shown in FIGS. 3 and 4, the reflection sheet 15 is made of a synthetic resin exhibiting white with excellent light reflectivity and is laid so as to cover almost the entire inner surface of the bottom plate 14 a of the chassis 14. The light from the cold cathode tube 18 is reflected to the optical member 16 side (light emission side).

  As shown in FIGS. 2 to 4, the optical member 16 has a rectangular shape in plan view similar to the bottom plate 14a of the chassis 14 and the liquid crystal panel 11, is made of a synthetic resin having translucency, and is cooled on the back side. It is interposed between the cathode tube 18 and the liquid crystal panel 11 on the front side. The optical member 16 includes, for example, a diffusion plate, a diffusion sheet, a lens sheet, and a brightness enhancement sheet in order from the back side, and converts light emitted from each cold cathode tube 18 that is a tubular light source into uniform planar light. It has functions such as conversion.

  As shown in FIGS. 2 and 3, the frame 17 extends along the outer edge on the long side of the liquid crystal panel 11 and the optical member 16, and both the outer edges on the long side of the chassis 14 are folded back. A pair is placed on the portion 14c. The frame 17 can hold the outer edge on the long side of the optical member 16 between the folded outer edge portion 14 c and can hold the outer edge on the long side of the liquid crystal panel 11 with the bezel 13. .

  The cold cathode tube 18 is a kind of linear light source (tubular light source), and as shown in FIG. 2 to FIG. 4, the chassis has a posture in which the axial direction coincides with the long side direction (X-axis direction) of the chassis 14. 14 in a state in which a plurality of pieces are substantially parallel to each other and spaced apart from each other by a predetermined interval, that is, intermittently in the short side direction (Y-axis direction) of the chassis 14. It is arranged in parallel along. The interval between adjacent cold cathode tubes 18, that is, the arrangement pitch, is approximately equal. The cold cathode tube 18 is disposed between the bottom plate 14a (reflective sheet 15) of the chassis 14 and the optical member 16, and is slightly lifted from the bottom plate 14a (reflective sheet 15). The respective end portions are fitted into the connectors 22, and the lamp holder 20 is attached so as to cover these connectors 22.

  The lamp clips 19 are made of a synthetic resin exhibiting white with excellent light reflectivity, and are distributed in a predetermined distribution with respect to the inner surface of the bottom plate 14a of the chassis 14 as shown in FIG. The lamp clip 19 is fixed to the bottom plate 14 a of the chassis 14, and can hold a central portion excluding both ends of each cold cathode tube 18. As a result, the distance between the cold cathode tube 18 and the bottom plate 14a of the chassis 14 can be maintained constant. 3 and 4, the illustration of the lamp clip 19 is omitted.

  The lamp holder 20 is made of a synthetic resin exhibiting white having excellent light reflectivity. As shown in FIGS. 2 and 4, the lamp holder 20 extends substantially along the short side direction of the chassis 14 and has an open back surface. It has a box shape. A pair of lamp holders 20 are attached to both ends of the short side of the chassis 14 so that the ends of the cold cathode tubes 18 arranged in parallel at the same position and the connectors 22 described later can be covered together. It is supposed to be. As shown in FIG. 3, a two-step step portion is formed on the front side surface of the lamp holder 20, and the lower step portion is an optical member receiving portion that receives the optical member 16. On the other hand, the step portion on the higher side is a liquid crystal panel receiving portion that receives the liquid crystal panel 11. The lamp holder 20 has an inclined portion that is inclined from the optical member receiving portion toward the bottom plate 14 a of the chassis 14.

  The inverter board 21 has an inverter circuit that boosts the input voltage input from the power source P and outputs an output voltage higher than the input voltage to the cold cathode tube 18, whereby the cold cathode tube 18 is turned on / off. It has a function to control. As shown in FIGS. 4 and 5, the inverter board 21 is arranged on the back side of the chassis 14, that is, on the opposite side to the cold cathode tube 18. A pair of inverter boards 21 are arranged near both ends in the long side direction of the bottom plate 14a of the chassis 14 and are placed on the mounting bases 14e provided on both ends in the long side direction of the bottom plate 14a. Each is fixed by screws B. The inverter board 21 has a vertically long shape, and the long side direction is equal to the Y-axis direction (short side direction in the chassis 14) and the short side direction is equal to the X-axis direction (long side direction in the chassis 14). I'm doing it. Further, a connector connecting portion that is individually fitted and connected to the connector 22 described below is formed at the end portion of the inverter substrate 21.

  As shown in FIGS. 4 and 5, the connectors 22 are arranged in a pair at positions corresponding to both ends of the cold cathode tube 18 with respect to the chassis 14, that is, at both ends in the long side direction of the bottom plate 14a. The bottom plate 14a is arranged side by side (by the number of the cold cathode tubes 18) along the short side direction (the Y-axis direction, the parallel direction of the cold cathode tubes 18). The arrangement pitch of the connectors 22 is substantially equal to the arrangement pitch of the cold cathode tubes 18. The installation positions of the connectors 22 in the Y-axis direction are almost the same as those of the cold cathode tubes 18. Each connector 22 is assembled in a state of penetrating through a mounting hole 14d formed in the bottom plate 14a of the chassis 14, and a portion protruding into the chassis 14 receives the end of the cold cathode tube 18 and its external connection. The portion protruding outside the chassis 14 is electrically connected to the connector connection portion of the inverter board 21, whereas the light source side connection portion is electrically connected to the portion (not shown). It is a board side connection part.

  As shown in FIGS. 2, 4 and 5, the control board 23 has a predetermined circuit pattern (not shown) on a board made of synthetic resin (for example, made of paper phenol or glass epoxy resin). Is formed. The control board 23 is connected to a drive control board DB (see FIG. 2) disposed on the front side of the chassis 14 via a flexible FPC board (not shown), and is used for television signals from the tuner T. Various input signals are converted into liquid crystal drive signals, and the converted liquid crystal drive signals are supplied to the drive control board DB via the FPC board, and then finally the liquid crystal panel via the flexible board FB. 11 can be supplied. The control board 23 has its plate surface parallel to the plate surface of the bottom plate 14a of the chassis 14, its long side direction coincides with the X-axis direction of each drawing, and its short side direction coincides with the Y-axis direction. ing. The control board 23 is disposed on the back side of the chassis 14 (on the side opposite to the cold cathode tube 18 side). Specifically, the control board 23 is substantially at the center position in the long side direction (more specifically, the pair of inverter boards 21). And one end side in the short side direction (more specifically, a position biased downward in the vertical direction). The control board 23 is fixed by screws B in a state of being placed on a mounting base part 14e provided on the center side in the long side direction of the bottom plate 14a. Note that the FPC board described above connects the control board 23 arranged on the back side of the chassis 14 and the drive control board DB arranged on the front side of the chassis 14, so that the lower side of the chassis 14 in the vertical direction is connected. The folded outer edge portion 14c on the side is bent in a folded shape so as to surround from the outside.

  The board cover 24 is made of metal like the chassis 14 and is arranged on the back side of the chassis 14 and can cover the control board 23 from the back side as shown in FIGS. The Specifically, the substrate cover 24 is opposed to the control substrate 23 with a predetermined interval, and has a base portion 23a that is horizontally long when viewed from the same plane as the control substrate 23, and a short side of the base portion 23a. It is comprised from a pair of piece part 23b which protrudes toward the front side (the baseplate 14 side of the chassis 14) from both the outer ends. The base 23a has a plate surface parallel to the plate surface of the control board 23 and the bottom plate 14a of the chassis 14, and has an outer shape (long side dimension and short side dimension) smaller than the bottom plate 14a than the control board 23. Is a little bigger. The pair of pieces 23b have plate surfaces parallel to the Y-axis direction and the Z-axis direction and orthogonal to the plate surface of the base portion 23a. The piece portion 23b has a cantilever shape with the outer end on the short side of the base portion 23a as a base end portion, and is elastic along the direction orthogonal to the plate surface, that is, the X-axis direction with the base end portion as a fulcrum. It can be deformed. The piece portion 23b has a length dimension extending over almost the entire length of the outer end on the short side of the base portion 23a. Note that both outer ends of the substrate cover 23 along the long side direction (X-axis direction) are openings that open along the Z-axis direction, and the FPC board and the like are drawn out through the openings. Is possible.

  The reinforcing portion 25 is made of metal like the chassis 14, and as shown in FIGS. 4 and 5, as a whole, extends substantially along the Y-axis direction (short side direction, vertical direction of the chassis 14). I am doing. A pair of reinforcing portions 25 are disposed on the back surface of the bottom plate 14a of the chassis 14 at positions between the control board 23 (board cover) on the center side and the inverter boards 21 on both ends in the X-axis direction. ing. In other words, the control board 23 and the board cover 24 are arranged so as to be sandwiched between the pair of reinforcing portions 25, and each inverter board 21 is closer to the end in the long side direction in the chassis 14 than each reinforcing portion 25. It is located at. The pair of reinforcing portions 25 are parallel to each other along the Y-axis direction, have a length that extends over the entire length in the short-side direction of the bottom plate 14a, and are spaced apart by about the long-side dimension of the substrate cover 24 in the X-axis direction. It is arranged at the position.

  The reinforcing portion 25 has a substantially channel shape in cross section cut along a direction orthogonal to the Y-axis direction by bending the metal plate material or the like. Specifically, as shown in FIG. 4, the reinforcing portion 25 includes both a first plate portion 25 a having plate surfaces along the X-axis direction and the Y-axis direction, and both in the width direction (X-axis direction) of the first plate portion 25 a. A pair of second plate portions 25b that protrude from the outer end toward the front side and have plate surfaces along the Y-axis direction and the Z-axis direction, and spread outward from the protruding ends of both the second plate portions 25a in the X-axis direction. And a pair of third plate portions 25c projecting from each other. Both the first plate portion 25a and the third plate portion 25c are parallel to the plate surface of the bottom plate 14a (base portion 23a), and the second plate portion is between the first plate portion 25a and the bottom plate 14a. The third plate portion 25c is abutted against the back surface of the bottom plate 14a and is fixed by welding, while being arranged to face each other with an interval (gap) corresponding to the protrusion size of 25b. Therefore, a substantially square space is held between the first plate portion 25a, the pair of second plate portions 25b, and the bottom plate 14a in plan view, and is surrounded by the reinforcing portion 25 and the bottom plate 14a. In this space, a stand 26 described below can be inserted from below in the vertical direction (FIGS. 5 and 7).

  As shown in FIGS. 2 and 5, the stand 26 includes a pedestal portion 26a that is directly placed on the installation surface of the liquid crystal display device 10, a shaft portion 26b that rises from the pedestal portion 26a along the vertical direction, and a shaft portion 26b. The support base portion 26c is fixed to the rising end portion and extends along the long side direction (horizontal direction) of the chassis 14, and the pair of support portions 26d rises along the vertical direction from both ends of the support base portion 26c. ing. Among these, the shaft portion 26b and the both support portions 26d have their axial directions along the vertical direction (Y-axis direction in the figure). Each component of the stand 26 is substantially fixed by having a fitting structure, and is further fixed by a screw B or the like. In the stand 26, the front ends of both support portions 26d are in the vertical direction of the reinforcing portion 25. It is inserted into the space at the lower end and fixed with screws B. Thereby, it is possible to support each plate surface of the base plate 24a of the bottom plate 14a, the control substrate 23, and the substrate cover 24 in a posture along the vertical direction.

  As described above, the reinforcing portion 25 according to the present embodiment has a function of attaching the stand 26 in addition to a function of reinforcing the chassis 14 which is an original function. Further, as described below, the board cover 24 is mounted. It also has the function of positioning and attaching it. First, as shown in FIGS. 6 and 8, the substrate cover 24 is detachable from the chassis 14 along the Z-axis direction, that is, along the direction perpendicular to the plate surfaces of the bottom plate 14a and the control substrate 23, Along with the attachment, it is sandwiched between the pair of reinforcing portions 25. In addition, below, let the upper direction (projection direction of the piece part 24b) shown in FIG.6 and FIG.8 be an attachment direction, and let the downward direction of the figure be a removal direction which is a direction opposite to an attachment direction. Further, in FIG. 8, the mounted substrate cover 24 is illustrated by a two-dot chain line. And a pair of piece part 24b in the board | substrate cover 24 is set as the form which protrudes along the attachment direction of the board | substrate cover 24 with respect to the chassis 14, and the inside in each reinforcement part 25 with the attachment, ie, the board | substrate cover 24 side. It can be brought into contact with the second plate portion 24b on the (control board 23 side). Thereby, the board cover 24 is positioned with respect to the reinforcing portion 25, the control board 23, and the chassis 14 in the X-axis direction, that is, in the first direction along the plate surface of the control board 23. As described above, the second plate portion 25b on the inner side of the reinforcing portion 25 constitutes a “positioning portion” for positioning the substrate cover 24 by being in contact with the piece portion 24b of the substrate cover 24. It can be said that this “positioning part” is provided integrally with the reinforcing part 25. Specifically, the inner dimension between the pair of reinforcing parts 25, that is, the distance between the plate surfaces 25ba facing the inner side of the second plate part 25b on the inner side of each reinforcing part 25 is the outer dimension of the substrate cover 24, that is, a pair of pieces. The distance between the side surfaces 24ba facing the outside (reinforcing portion 25 side) of the portion 24b is substantially equal. As a result, the pair of pieces 24b in the substrate cover 24 are substantially the same as the plate surfaces 25ba in which the side surfaces 24ba facing outward are directed inward in the second plate portions 25b in the pair of reinforcing portions 25, respectively. It abuts over the entire length.

  Further, as shown in FIG. 6 and FIG. 7, a locking structure in which the pair of pieces 24 b in the substrate cover 24 and the second plate portions 24 b inside the pair of reinforcing portions 25 are locked to each other. Is provided. Specifically, as shown in FIG. 6, a bent portion 27 that protrudes inward is formed at a central portion in the protruding direction (Z-axis direction) from the base portion 24 a in the piece portion 24 b, and is formed on the outer surface side thereof. A locking recess 27a is formed. As shown in FIG. 7, the bending portions 27 and the locking recesses 27 a are arranged in pairs at positions that are spaced apart from each other in the Y-axis direction in each piece portion 24 b, and a total of four are arranged. On the other hand, the inner side second plate portion 25b of each reinforcing portion 25 protrudes inward as shown in FIG. 6 at the center side portion in the protruding direction (Z-axis direction) from the first plate portion 25a. A bent portion 28 is formed, and a locking convex portion 28a is formed on the inner surface side thereof. As shown in FIG. 7, the bent portions 28 and the locking convex portions 28 a are arranged in pairs at a predetermined interval in the Y-axis direction in each second plate portion 25 b, and a total of four are arranged. ing. As shown in FIGS. 6 and 7, these bent portions 27 and 28 both have a substantially triangular pyramid shape, a cross-sectional shape cut along the X-axis direction and the Z-axis direction, the X-axis direction and the Y-axis. Each of the cross-sectional shapes cut along the axial direction forms a substantially triangular mountain shape. When the substrate cover 24 is sandwiched between the pair of reinforcing portions 25 along the Z-axis direction, the locking projections 28a on the reinforcing portion 25 side interfere with the pieces 24b on the substrate cover 24 side. Thus, once each piece 24b is elastically deformed and then the substrate cover 24 is pushed to a predetermined depth, each piece 24b is restored and each locking projection 28a is fitted in each locking recess 27a. The peripheral surfaces are locked with each other. Thereby, the substrate cover 24 is positioned with respect to the reinforcing portion 25, the control substrate 23, and the chassis 14 in the Y-axis direction, that is, in the second direction along the plate surface of the control substrate 23, and in the Z-axis direction, that is, the substrate. The movement of the cover 24 in the attaching direction and the detaching direction is restricted to prevent the cover 24 from coming off. Thus, it can be said that the reinforcing portion 25 has both the mounting function of the stand 26 and the positioning function and mounting function of the board cover 24 in addition to the reinforcing function of the chassis 14 which is the original function. Therefore, the structure can be simplified as compared with the case where a dedicated attachment portion of the stand 26, a dedicated positioning portion of the substrate cover 24, and the dedicated attachment portion are provided separately from the reinforcing portion 25.

  This embodiment has the structure as described above, and the operation thereof will be described subsequently. In order to manufacture the liquid crystal display device 10, the separately manufactured liquid crystal panel 11, backlight device 12, bezel 13 and the like are assembled. Hereinafter, the manufacturing procedure of the backlight device 12 will be mainly described.

  On the front side of the chassis 14, the reflective sheet 15, the lamp clip 19, the cold cathode tube 18 and the connector 22, the lamp holder 20, the frame 17, the optical member 16, and the like are appropriately assembled. The reinforcement part 25, the control board 23, the inverter board | substrate 21, the board | substrate cover 24, the stand 26, etc. are assembled | attached suitably (FIGS. 3 and 4). Hereinafter, the assembling operation of each member arranged on the back side of the chassis 14 will be described in detail.

  Prior to the assembly work of each member arranged on the front side and the assembly work of each member other than the reinforcement part 25 arranged on the back side, the pair of reinforcement parts 25 are fixed to the chassis 14 in an attached state by welding in advance. deep. As a result, when the assembly work of each member other than the reinforcing portion 25 is performed, the chassis 14 is already reinforced by the reinforcing portion 25 and sufficient rigidity is secured. Therefore, the assembly workability of each member is excellent. The control board 23 and the pair of inverter boards 21 are assembled to the back side of the chassis 14 in a state where the reinforcing portion 25 is fixed. The control board 23 is arranged on the center side in the long side direction of the chassis 14, and the pair of inverter boards 21 are arranged on both end sides in the long side direction of the chassis 14, and is screwed on the mounting base 14 e. It is fixed by.

  Subsequently, an operation of assembling the board cover 24 for covering the control board 23 to the chassis 14 will be described. As shown in FIG. 8, the board cover 24 is positioned so that the protruding end of each piece 24 b faces the bottom plate 14 a, and approaches the bottom plate 14 a in the Z-axis direction from a position spaced apart from the bottom plate 14 a of the chassis 14. So that it pushes in the mounting direction. Then, the substrate cover 24 is sandwiched between the pair of reinforcing portions 25, and the outer side surface 24 ba of the pair of piece portions 24 b is placed on the inner plate surface 25 ba of the inner second plate portion 25 b of the pair of reinforcing portions 24. It abuts against. Thereby, the substrate cover 24 is positioned with respect to the chassis 14 and the control substrate 23 in the X-axis direction (horizontal direction). In this state, when the substrate cover 24 is further pushed toward the bottom plate 14a, each piece 24b rides on each locking projection 28a, and is elastically deformed and is inward in the X-axis direction, that is, on the control substrate 23 side. Is displaced. Then, when the board cover 24 is pushed to the proper mounting position, the locking projections 28a are fitted into the locking recesses 27a of the respective piece portions 24b, and the respective piece portions 24b are elastically restored. At this time, as shown in FIGS. 6 and 7, the peripheral surfaces of the locking projections 28 a and the locking recesses 27 a are locked to each other, so that the board cover 24 is attached to the chassis 14 and the control board 23. Thus, positioning in the Y-axis direction (vertical direction) is achieved, and movement in the detaching direction in the Z-axis direction is restricted, that is, it can be prevented from coming off. As described above, since the positioning of the substrate cover 24 and the retaining of the substrate cover 24 can be achieved simultaneously, the workability of attaching the substrate cover 24 is extremely excellent. In addition, since the substrate cover 24 is positioned, the substrate cover 24 is prevented from interfering with the control substrate 23 during the mounting operation. It is possible to prevent the control substrate 23 from being damaged. As for the stand 26, as shown in FIGS. 5 and 7, the distal ends of the pair of support portions 26d are inserted into the space at the lower end in the vertical direction of each of the hollow reinforcing portions 25, and screws B By tightening, it is fixed in the mounted state.

  As described above, the backlight device (illumination device) 12 of this embodiment includes a cold cathode tube (light source) 18, a chassis 14 in which the cold cathode tube 18 is accommodated, and a control board (circuit board) attached to the chassis 14. ) 23, a substrate cover 24 attached to the chassis 14 and arranged to cover the control board 23, a reinforcing portion 25 that is a reinforcing portion provided in the chassis 14, and a substrate cover that is provided integrally with the reinforcing portion 25. And a second plate portion 25b which is a positioning portion for positioning the head 24.

  According to such a configuration, the board cover 24 is attached to the chassis 14 to which the control board 23 is attached so as to cover the control board 23. When the substrate cover 24 is attached, the substrate cover 24 is positioned by the second plate portion 25b which is a positioning portion provided integrally with the reinforcing portion 25, so that the workability related to the attachment is excellent. Further, since the substrate cover 24 is positioned, the substrate cover 24 can be prevented from interfering with the control substrate 23 during the mounting operation, and the control substrate 23 can be prevented from being damaged.

  In addition, the second plate portion 25b as a positioning portion is provided integrally with the reinforcing portion 25 which is an existing structure provided in the chassis 14, so that the substrate cover 24 is positioned in the reinforcing portion 25 in addition to the original function. Since the functions are also provided, the structure can be simplified as compared with a case where a dedicated portion having a positioning function is provided separately from the reinforcing portion 25.

  Further, the second plate portion 25 b that is a positioning portion regulates the movement of the substrate cover 24 in at least one direction along the plate surface of the control substrate 23. In this way, the substrate cover 24 arranged so as to cover the control substrate 23 is positioned by being restricted in movement in at least one direction along the plate surface of the control substrate 23 by the second plate portion 25b which is a positioning portion. Therefore, it is possible to suitably prevent the interference of the substrate cover 24 with the control substrate 23 as well as the workability related to the attachment.

  The board cover 24 is attached to the chassis 14 along a direction (Z-axis direction) orthogonal to the plate surface of the control board 23. In this way, the substrate cover 24 attached along the direction orthogonal to the plate surface of the control substrate 23 can be appropriately positioned with respect to the control substrate 23 by the second plate portion 25b which is a positioning portion.

  Further, the substrate cover 24 is provided with a piece 24b that protrudes along the mounting direction with respect to the chassis 14 and whose side surface 24ba is directed to the second plate portion 25b that is a positioning portion. In this way, the substrate cover 24 can be positioned with respect to the control substrate 23 by placing the side surface 24ba of the piece 24b toward the second plate portion 25b, which is a positioning portion.

  In addition, the second plate portion 25b and the piece portion 24b, which are positioning portions, are locked to each other to thereby prevent the substrate cover 24 from moving in the direction opposite to the mounting direction (locking recess). 27a and locking projections 28a) are provided. If it does in this way, it can prevent that the board | substrate cover 24 remove | deviates from the direction opposite to the attachment direction from the chassis 14 by the latching structure provided in the 2nd board part 25b and the piece part 24b which are positioning parts. In addition to the positioning function described above for the second plate portion 25b and the piece portion 24b, which are positioning portions, it is possible to have a function of preventing the substrate cover 24 from being removed, so that the second plate portion 25b, which is a positioning portion, is assumed. In addition, the structure can be further simplified as compared with the case where a retaining structure is provided separately from the piece 24b.

  Further, the chassis 14 is provided with a reinforcing portion 25 having a form extending along the side (short side), and the above-described functional portion includes the reinforcing portion 25. If it does in this way, reinforcement of the chassis 14 can be aimed at by the reinforcement part 25 of the form extended along the edge | side of the chassis 14, The 2nd board part 25b which is a positioning part is set by using the reinforcement part 25 as a function part. By providing them integrally, the positioning function of the substrate cover 24 can be shared.

  In addition, the pair of reinforcing portions 25 are arranged in parallel with each other with a space therebetween, and the control substrate 23 and the substrate cover 24 are both arranged between the pair of reinforcing portions 25. In this way, the control board 23 and the board cover 24 can be attached using the space secured between the pair of reinforcing portions 25.

  A stand (support member) 26 that supports the chassis 14 is provided, and the stand 26 is attached to the reinforcing portion 25. In this way, since the reinforcing portion 25 has a function of attaching the stand 26 in addition to the positioning function, the structure can be further simplified.

<Embodiment 2>
A second embodiment of the present invention will be described with reference to FIG. 9 or FIG. In this Embodiment 2, what changed the structure of the reinforcement part 125 and the board | substrate cover 124 is shown. In addition, the overlapping description about the same structure, operation | movement, and effect as above-mentioned Embodiment 1 is abbreviate | omitted.

  As shown in FIG. 9, the reinforcing portion 125 has a substantially channel-shaped cross section cut along a direction orthogonal to the Y-axis direction, and a first plate portion 125 a fixed to the bottom plate 14 a of the chassis 14. The first plate portion 125a includes a pair of second plate portions 125b protruding from both outer ends toward the back side along the Z-axis direction. Accordingly, the reinforcing portion 125 has an opening OP between the protruding tips of the pair of second plate portions 125b, and the space surrounded by the first plate portion 125a and the pair of second plate portions 125b is on the back side. It is set as the form opened toward. On the other hand, the pair of pieces 124b constituting the substrate cover 124 is inserted into the space in the reinforcing portion 125 through the opening OP. Then, the side surface 124ba facing the inner side (control board 23 side) of the pair of pieces 124b faces the outer side of the inner second plate part 125b (the side opposite to the control board 23 side) of the pair of reinforcing parts 125. It is possible to abut against the plate surface 125ba, whereby the substrate cover 124 can be positioned in the X-axis direction. In addition, a locking hole 29 is formed in the second plate portion 125b on the inner side of the reinforcing portion 125 so as to open at a substantially central position in the Z-axis direction. On the other hand, a bent portion 127 having a shape protruding inward is formed in the one portion 124b of the substrate cover 124, and the bent portion 127 is fitted into the above-described locking hole 29 and surrounded. The surfaces can be locked. That is, it can be said that the bent portion 127 constitutes a “locking convex portion” that is locked to the locking hole 29. As a result, the substrate cover 124 is positioned in the Y-axis direction and is prevented from coming off in the Z-axis direction.

<Embodiment 3>
A third embodiment of the present invention will be described with reference to FIGS. In the third embodiment, a structure in which the mounting structure of the substrate cover 224 to the reinforcing portion 225 is changed from the above-described first embodiment is shown. In addition, the overlapping description about the same structure, operation | movement, and effect as above-mentioned Embodiment 1 is abbreviate | omitted.

  As shown in FIGS. 11 to 13, the substrate cover 224 is attached by being slid along the Y-axis direction with respect to the reinforcing portion 225. Specifically, as shown in FIG. 12, the board cover 224 includes a base portion 224a having a plate surface parallel to the plate surface of the control board 223, and a bottom plate 14a of the chassis 14 from both outer ends on the short side of the base portion 224a. And a pair of slide plate portions 30 projecting outward in the X-axis direction (opposite to the control board 23 side) from the projecting tip of each piece 224b. Yes. The slide plate portion 30 has a length over the entire length of the piece portion 224b in the Y-axis direction.

  On the other hand, each of the pair of reinforcing portions 225 arranged so as to sandwich the substrate cover 224 is made of a synthetic resin and has a plate shape extending along the Y-axis direction as a whole. A slide groove (slide recess) 31 is formed on the surface of the 14 facing the bottom plate 14a. The slide groove portion 31 is configured to open toward the inner side (control board 223 side) in the Y-axis direction, that is, the upper side in the vertical direction and the X-axis direction, thereby allowing the slide plate portion 30 to be received. ing. Accordingly, the substrate cover 224 is slid from the upper side to the lower side in the vertical direction with respect to the reinforcing portion 225 when attached, as shown in FIGS. It is designed to slide upward from the top. In the present embodiment, the lower direction in the vertical direction is the attachment direction, and the upper direction in the vertical direction is the removal direction, which is the opposite direction of the attachment direction. The slide groove portion 31 has a groove width that is approximately the same as or slightly smaller than the thickness of the slide plate portion 30, and the depth is approximately the same as or greater than the width dimension of the slide plate portion 30. The size is slightly smaller. Accordingly, the peripheral surface of the slide plate portion 30 can be brought into contact with the groove edge of the slide groove portion 31 and the back surface of the bottom plate 14a, and thus the substrate cover 224 can be positioned in the X axis direction and the Z axis direction. . Accordingly, it can be said that the groove edge 31 a along the Y-axis direction, that is, the mounting direction, of the groove edges of the slide groove part 31 constitutes a “positioning part” for positioning the substrate cover 224. Of the groove edges of the slide groove portion 31, the lower end portion in the vertical direction, that is, the rear end portion in the attachment direction hits the slide plate portion 30, so that the substrate cover 224 that has reached a predetermined position moves further in the attachment direction. This is a stopper portion 32 that restricts this. The substrate cover 224 according to the present embodiment is fixed to the bottom plate 14a of the chassis 14 with screws B in a state where the slide plate portion 30 abuts against the stopper portion 32.

  Further, as shown in FIG. 13, in addition to a ground pattern (not shown) being formed on the control board 223, a ground electrode portion 33 connected to the ground pattern is formed. The ground electrode portion 33 is formed with a contact piece 33 a extending in the Y-axis direction, that is, along the sliding direction of the substrate cover 224. The contact piece 33a is formed in a cantilever shape having a substantially U-shaped cross section, and protrudes from the control board 223 toward the base 224a side of the opposing substrate cover 224 so as to be elastically deformable in the Z-axis direction. The As shown in FIGS. 13 and 15, the cantilevered contact piece 33a has a base end on the upper side in the vertical direction (left side shown in FIG. 13), that is, on the near side in the mounting direction of the substrate cover 224. In addition, since the free end portion is on the lower side in the vertical direction, that is, on the back side in the mounting direction of the substrate cover 224, it is elastically deformed with the base end portion as a fulcrum as the substrate cover 224 is attached. At the same time, the base 224a is elastically contacted. As a result, the ground pattern on the control board 223 is connected to the metal board cover 224 via the ground electrode portion 33, and the board cover 224 is made of metal and forms the casing of the backlight device 12. Since it is in contact with the bottom plate 14a, the ground potential can be stabilized.

  As described above, according to the present embodiment, the board cover 224 is attached to the chassis 214 along the plate surface of the control board 223. In this way, the substrate cover 224 attached along the plate surface of the control substrate 223 can be appropriately positioned with respect to the control substrate 23 by the groove edge 31a of the slide groove portion 31 that is a positioning portion.

  The reinforcing portion 225 is provided with a slide groove portion (groove portion) 31 that opens along the attachment direction of the substrate cover 224 with respect to the chassis 14 and can receive the substrate cover 224, and follows the attachment direction of the slide groove portion 31. A positioning portion is constituted by the groove edge 31a. In this way, the movement of the substrate cover 224 in the direction intersecting the attachment direction can be restricted by the positioning portion formed by the groove edge 31a along the attachment direction in the slide groove portion 31, thereby positioning the substrate cover 224. be able to.

  In addition, a stopper portion 32 that restricts the substrate cover 224 from moving in the attachment direction by abutting against the substrate cover 224 is provided on the inner side of the groove edge of the slide groove portion 31 with respect to the substrate cover 224 in the attachment direction. It has been. In this way, when the substrate cover 224 received in the slide groove portion 31 is pushed in the attachment direction, the stopper portion 32 abuts against the substrate cover 224, so that further movement in the attachment direction is restricted. Thereby, the substrate cover 224 can be positioned in the mounting direction.

  Further, at least when the board cover 224 is attached, the chassis 14 is arranged so that the plate surface of the control board 223 is along the vertical direction, and the attachment direction of the board cover 224 is a direction from the upper side to the lower side in the vertical direction. The stopper portion 32 is arranged on the lower side in the vertical direction with respect to the substrate cover 224. In this way, when the board cover 224 received in the slide groove 31 is moved from the upper side in the vertical direction to the lower side with respect to the chassis 14 in order to attach the board cover 224, the board cover 224 is arranged on the lower side in the vertical direction. When the substrate cover 224 is abutted against the stopper portion 32, the further movement is restricted. As described above, when the substrate cover 224 is attached, the work can be performed using gravity, so that the workability is extremely excellent.

<Embodiment 4>
A fourth embodiment of the present invention will be described with reference to FIGS. In this Embodiment 4, what changed the structure of the reinforcement part 325, etc. from above-mentioned Embodiment 3 is shown. In addition, the overlapping description about the same structure, effect | action, and effect as above-mentioned Embodiment 3 is abbreviate | omitted.

  As shown in FIGS. 16 and 17, the reinforcing portion 325 has a first plate portion 325 a fixed to the bottom plate 14 a of the chassis 14, and is directed from the both outer ends of the first plate portion 325 a to the back side along the Z-axis direction. A pair of second plate portions 325b protruding from the second plate portion 325b, a third plate portion 34 protruding further from the second plate portion 325b toward the first plate portion 325a side along the X-axis direction, and a third plate portion The fourth plate portion 35 protrudes from the side 34 toward the front side (the bottom plate 14a side), and the fifth plate portion 36 protrudes from the fourth plate portion 35 toward the first plate portion 325a. Among these, the 3rd board part 34, the 4th board part 35, and the 5th board part 36 which are mutually connected comprise the cross-sectional substantially channel type. The fifth plate portion 36 on the inner side (on the control board 23 side) of the reinforcing portion 325 is opposed to the bottom plate 14a of the chassis 14 with a predetermined interval, and this space is the substrate cover 324. The slide plate portion 330 can be inserted into the slide groove portion 331. Further, the fourth plate portion 35 on the inner side (control board 23 side) of the reinforcing portion 325 has a plate surface 35a facing the inner side against a side surface 324ba facing the outer side of the one portion 324b of the substrate cover 324. By being in contact, the substrate cover 324 can be positioned in the X-axis direction. That is, in the present embodiment, it can be said that the fourth plate portion 35 constitutes a “positioning portion” for the substrate cover 324.

  As shown in FIGS. 17 and 18, the slide groove portion 331 is opened upward in the vertical direction and toward the control board 23 in the X-axis direction. Of the fifth plate portion 36, a stopper that protrudes toward the bottom plate 14 a side and closes the slide groove portion 331 and abuts the slide plate portion 330 on the lower side in the vertical direction with respect to the substrate cover 324, that is, the back side in the mounting direction. A portion 332 is formed. On the other hand, an elastic locking piece 37 that protrudes toward the bottom plate 14 a is formed on the fifth plate portion 36 on the upper side in the vertical direction with respect to the substrate cover 324, that is, on the near side in the mounting direction. The elastic locking piece 37 has a cantilever shape having a base end on the upper side in the vertical direction and is elastically deformable along the Z-axis direction (direction intersecting the sliding direction of the substrate cover 324). It is possible to elastically lock the upper end portion of 330 in the vertical direction (front end portion in the attaching direction). Specifically, the elastic locking piece 37 is once elastically deformed by being pressed by the slide plate portion 330 along with the attachment of the substrate cover 324 and retracted from the slide groove portion 331, and then the substrate cover 324 is moved to the normal attachment position. When it reaches the point, it is elastically restored and advances into the slide groove portion 331 so as to be locked to the slide plate portion 330 from the upper side in the vertical direction. Accordingly, it is possible to prevent the substrate cover 324 from coming off without using the screws B as in the third embodiment.

  As described above, according to the present embodiment, the board cover 324 is attached to the board cover 324 on the near side in the mounting direction with respect to the board cover 324 in the groove edge of the slide groove portion 331, so that the board cover 324 is attached in the mounting direction. An elastic locking piece 37 is provided as a retaining portion for restricting movement in the opposite direction. In this way, when the substrate cover 324 received in the slide groove 331 is pushed in the mounting direction and reaches a predetermined position, the elastic locking piece 37 as a retaining portion is locked to the substrate cover 324, thereby The cover 324 is restricted from moving in the direction opposite to the mounting direction. Thereby, it is possible to prevent the substrate cover 324 from being removed while positioning the substrate cover 324.

  Further, the above-described retaining portion is composed of an elastic locking piece 37 that can be elastically locked to the substrate cover 324. In this way, when the substrate cover 324 is attached to the chassis 14, the elastic locking piece 37 that forms the retaining portion is elastically locked to the substrate cover 324, thereby preventing the substrate cover 324 from coming off. Is planned.

<Embodiment 5>
A fifth embodiment of the present invention will be described with reference to FIGS. In the fifth embodiment, a structure in which the structure of the reinforcing portion 425 and the substrate cover 424 is partially changed from the above-described fourth embodiment is shown. In addition, the overlapping description about the same structure, an effect | action, and effect as above-mentioned Embodiment 4 is abbreviate | omitted.

  Of the reinforcing portion 425, the third plate portion 434, the fourth plate portion 435, and the fifth plate portion 436 on the inner side (control board 23 side) are spaced apart from each other in the Y-axis direction, as shown in FIGS. Cutouts 38 are formed in two places. The cutouts 38 are respectively arranged at a substantially central position in the vertical direction (Y-axis direction) in the reinforcing portion 425 and a lower position in the vertical direction than that. In contrast, a cutout 39 is formed in the slide plate portion 430 of the substrate cover 424. The notch 39 is disposed at a substantially central position in the vertical direction of the slide plate portion 430. Of the third plate portion 434, the fourth plate portion 435, and the fifth plate portion 436 in the reinforcing portion 425, a pair of cutouts 39 are provided. By having a size in a slightly wider range in the Y-axis direction than the remaining portion sandwiched between the notches 38, insertion of the remaining portion is allowed. On the other hand, the pair of notches 38 in the reinforcing portion 425 has a slightly wider size in the Y-axis direction than the remaining portions of the slide plate portion 430 divided by the notches 39, so that each of the remaining portions Is allowed to be inserted.

  Therefore, when attaching the substrate cover 424 to the reinforcing portion 425, as shown in FIGS. 21 and 22, the remaining portion of the slide plate portion 430 is aligned with each notch 38 of the reinforcing portion 425, and the notch From the state where the remaining portions of the third plate portion 434, the fourth plate portion 435, and the fifth plate portion 436 sandwiched between the portions 38 are aligned with the notches 39 of the slide plate portion 430, the substrate cover 424 is moved in the Z-axis direction. Are pushed toward the bottom plate 14a side of the chassis 14 and brought into contact with the bottom plate 14a, thereby positioning the slide plate portion 430 with respect to the slide groove portion 431 in the Z-axis direction. In this state, when the substrate cover 424 is slid from the upper side to the lower side in the vertical direction, the slide plate portion 430 slides between the bottom plate 14a and the fifth plate portion 436 as shown in FIGS. By entering the groove portion 431 and hitting the stopper portion 432, further sliding is restricted. Then, the board cover 424 can be fixed to the reinforcing portion 425 and the chassis 14 in an attached state by tightening the screw B to the fifth plate portion 436 through the screw holes 434a formed in the third plate portion 434. As described above, in this embodiment, since the sliding amount of the substrate cover 424 is relatively shorter than that in the above-described fourth embodiment, the attachment workability is further improved.

<Embodiment 6>
A sixth embodiment of the present invention will be described with reference to FIGS. In this sixth embodiment, a modification is shown in which the reinforcing portion 525 is integrally formed with the chassis 514 from the above-described third embodiment. In addition, the overlapping description about the same structure, effect | action, and effect as above-mentioned Embodiment 3 is abbreviate | omitted.

  As shown in FIGS. 23 to 25, the reinforcing portion 525 is integrally provided by partially expanding the bottom plate 514 a of the chassis 514. A pair of reinforcing portions 525 are arranged at two positions separated in the X-axis direction, and extend along the Y-axis direction. As shown in FIGS. 24 and 25, each reinforcing portion 525 has a substantially trapezoidal cross-sectional shape, and a rising portion 40 that rises from the bottom plate 514 a toward the back side and a top portion that connects the tips of the rising portions 40. 41. The rising portion 40 of the reinforcing portion 525 is formed with a slide groove portion 531 into which the slide plate portion 530 of the substrate cover 524 can be inserted. When the slide plate portion 530 is inserted into the slide groove portion 531, the slide plate portion 530 is a portion along the Y-axis direction of the rising portion 40 constituting the reinforcing portion 525, with respect to the inner surface of the portion where the slide groove portion 531 is not formed. By abutting, the substrate cover 524 can be positioned in the X-axis direction. That is, it can be said that the rising portion 40 in the reinforcing portion 525 constitutes a “positioning portion” for the substrate cover 524.

<Embodiment 7>
A seventh embodiment of the present invention will be described with reference to FIGS. The seventh embodiment is different from the first to sixth embodiments described above in that the substrate cover 624 is positioned by the cabinet holding portion 42 which is a “functional portion” for holding the cabinet Cb. is doing. In addition, the overlapping description about the same structure, operation | movement, and effect as above-mentioned Embodiment 1 is abbreviate | omitted.

  As shown in FIGS. 26 to 28, the bottom plate 614a of the chassis 614 according to the present embodiment holds the cabinet Cb on the back side among the front and back cabinets Ca and Cb constituting the exterior member of the liquid crystal display device 610. The cabinet holding part 42 is provided. The cabinet holding portions 42 are respectively arranged at four locations separated from each other in the X-axis direction and the Y-axis direction on the bottom plate 614a. The cabinet holding portion 42 has a substantially cylindrical shape protruding from the bottom plate 614a toward the back side along the Z-axis direction, and a screw B for fixing the cabinet Cb can be inserted into the tip portion thereof. A metal spacer 43 lower than the cabinet holding part 42 is formed on the outer peripheral side of the cabinet holding part 42, and the control board 623 can be received from the front side. In addition to a ground pattern (not shown) being formed on the control board 623, a ground electrode portion 44 connected to the ground pattern is formed. A hole through which the cabinet holding portion 42 is passed through the ground electrode portion 44. The part is formed. The ground electrode portion 44 can be brought into contact with the metal spacer 43 described above, and is thereby electrically connected to the chassis 614.

  On the other hand, the substrate cover 624 includes a base portion 624a having a plate surface parallel to the plate surface of the control substrate 623, and a pair of pieces projecting from both outer ends on the short side of the base portion 624a toward the bottom plate 614a of the chassis 614. And a pair of projecting plate portions 45 projecting outward in the X-axis direction from the projecting tip of each piece 624b (on the opposite side to the control substrate 623 side). Among these, the protruding plate portion 45 is formed with a positioning hole 46 through which the cabinet holding portion 42 can be inserted. That is, the substrate cover 624 according to the present embodiment is attached along the Z-axis direction to the bottom plate 614a of the chassis 614, and at that time, the cabinet holding portion 42 is inserted into the positioning hole 46 of the protruding plate portion 45. In addition, the peripheral surfaces are brought into contact with each other, whereby positioning in the X-axis direction and the Y-axis direction with respect to the chassis 614 is achieved. Therefore, in addition to the original function of holding the cabinet Cb, which is an exterior member of the liquid crystal display device 610, the cabinet holding unit 42 also has a positioning function with respect to the substrate cover 624. It can be said that it constitutes a “positioning part”. Further, a metal washer 47 is interposed between the ground electrode portion 44 and the projecting plate portion 45, whereby the ground electrode portion 44 and the substrate cover 624 are electrically connected. The substrate cover 624 is fixed to the mounting base portion 614e formed on the bottom plate 614a of the chassis 614 with screws B (FIG. 28).

  As described above, according to the present embodiment, the cabinets (exterior members) Ca and Cb that accommodate the cold cathode fluorescent lamp 18 and the chassis 614 to which the control substrate 623 and the substrate cover 624 are attached are provided. Is provided with a cabinet holding part (holding part) 42 for holding the cabinets Ca and Cb, and the “functional part” is composed of the cabinet holding part 42. In this way, the cabinets Ca and Cb for housing the chassis 614 can be held by the cabinet holding part 42, and the board cover is provided by integrally providing the positioning part with the cabinet holding part 42 as a functional part. 624 positioning functions can be used together.

<Eighth embodiment>
An eighth embodiment of the present invention will be described with reference to FIGS. In the eighth embodiment, the cabinet holding portion 742 is integrally formed with the chassis 714 from the seventh embodiment, and the mounting structure of the substrate cover 724 is changed to the same as that of the third embodiment. In addition, the overlapping description about the same structure, an effect | action, and effect as above-mentioned Embodiment 7 is abbreviate | omitted.

  As shown in FIGS. 29 to 31, the cabinet holding portion 742 is integrally provided by partially expanding the bottom plate 714 a of the chassis 714. A total of six cabinet holding portions 742 are arranged in two places separated in the X-axis direction and three places separated in the Y-axis direction in the bottom plate 714a. Each cabinet holding part 742 has a substantially truncated cone shape as a whole and a substantially trapezoidal cross section. The cabinet holding part 742 includes a rising part 48 that rises from the bottom plate 714 a toward the back side, and a top part 49 that connects the tips of the rising part 48. Among these, the top portion 49 is addressed to the rear cabinet Cb and the cabinet Cb can be held by the screw B. On the other hand, the substrate cover 724 is attached by being slid along the Y-axis direction with respect to the cabinet holding portion 742. Specifically, the substrate cover 724 includes a base portion 724a having a plate surface parallel to the plate surface of the control substrate 23, and a pair of protrusions projecting from both outer ends on the short side of the base portion 724a toward the bottom plate 714a of the chassis 714. It is comprised from the piece part 724b and a pair of slide board part 50 which protrudes outward (an opposite side to the control board 23 side) about the X-axis direction from the protrusion front-end | tip of each piece part 724b. The slide plate portion 50 has a length over the entire length of the piece portion 724b in the Y-axis direction.

  A slide groove portion 51 into which the slide plate portion 50 of the substrate cover 724 can be inserted is formed in the rising portion 48 of each cabinet holding portion 742. Specifically, in the total four cabinet holding portions 742 on the upper side and the central side in the vertical direction, the slide groove portion 51 is formed over a substantially half region on the control board 23 side of the rising portion 50, whereas the vertical portion In the two cabinet holding parts 742 on the lower side in the direction, the slide groove part 51 has a substantially half area on the control board 23 side in the rising part 50 and a further upper half area in the vertical direction (one quarter of the whole). Region). When the slide plate portion 50 is inserted into the slide groove portion 51 of each cabinet holding portion 742, the slide plate portion 50 contacts the groove edge 51 a facing the control board 23 among the groove edges of the slide groove portion 51. By being in contact, the substrate cover 724 can be positioned in the X-axis direction. That is, it can be said that the cabinet holding portion 742 forms a “positioning portion” for the substrate cover 524. Further, among the groove edges of the slide groove portion 51 in the cabinet holding portion 742 disposed on the lower side in the vertical direction, the stopper portion 52 that restricts further sliding by the lower end portion in the vertical direction hitting the slide plate portion 50. Function as.

<Ninth Embodiment>
A ninth embodiment of the present invention will be described with reference to FIG. 32 or FIG. The ninth embodiment is different from the first to eighth embodiments described above in that the substrate cover 824 is positioned by the vent holes 53 that are “functional portions” for the purpose of circulating air inside and outside the chassis 814. Is different. In addition, the overlapping description about the same structure, operation | movement, and effect as above-mentioned Embodiment 1 is abbreviate | omitted.

  As shown in FIGS. 32 and 33, the bottom plate 814 a of the chassis 814 according to the present embodiment is formed with a ventilation hole 53 through which air inside and outside the chassis 814 can flow. A total of six vent holes 53 are arranged at two locations spaced in the X-axis direction and three locations spaced in the Y-axis direction on the bottom plate 814a. The vent hole 53 has a vertically long rectangular shape when seen in a plan view. Further, the reflection sheet 815 is formed with a communication hole 54 that allows air to flow by communicating with the vent hole 53.

  On the other hand, the substrate cover 824 includes a base portion 824a having a plate surface parallel to the plate surface of the control substrate 23, and a pair of pieces protruding from both outer ends on the short side of the base portion 824a toward the bottom plate 814a of the chassis 814. Part 824b, a pair of projecting plate parts 55 projecting outward in the X-axis direction from the projecting tip of each piece part 824b (on the side opposite to the control board 23 side), and further projecting from the projecting plate part 55 toward the bottom plate 814a. It is comprised from a pair of insertion part 56. FIG. Of these, the insertion portion 56 can be inserted into the vent hole 53 in the bottom plate 814a. And the side surface 56a which faced the inner side (control board 23 side) in a pair of insertion part 56 is each contact | abutted with the inner edge part 53a among the hole edges of a pair of ventilation hole 53 located in a line with respect to the X-axis direction. Thus, the substrate cover 824 can be positioned with respect to the chassis 814 in the X-axis direction. Therefore, the vent hole 53 according to the present embodiment has a positioning function with respect to the substrate cover 824 in addition to the original function of circulating the air inside and outside the chassis 814 to dissipate heat from the backlight device 12. Therefore, it can be said that the inner edge 53a of the vent hole 53 constitutes a “positioning portion”. Further, the width dimension (short side dimension) of the vent hole 53 is larger than the plate thickness dimension of the insertion portion 56, thereby allowing the air inside and outside the chassis 814 to flow even when the insertion portion 56 is inserted. It is supposed to be. The protruding plate portion 55 is fixed to the mounting base portion 814e of the chassis 814 with screws B.

  As described above, according to the present embodiment, the chassis 814 is provided with the vent holes 53 for allowing the inside and outside air to circulate, and the “functional part” is composed of the vent holes 53. At least a part of the hole edge (inner edge 53a) of the vent hole 53 constitutes a positioning part. Further, the board cover 824 is inserted into the vent hole 53 and has an inner edge as a positioning part. An insertion portion 56 that is in contact with 53a is provided. In this way, the air inside and outside the chassis 814 can be circulated through the vent hole 53, so that the heat generated from the cold cathode tube 18 can be dissipated. The positioning function of the substrate cover 824 can be shared by providing the positioning part integrally with the vent hole 53 as a function part.

<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 each of the above-described embodiments, the configuration in which the control board for driving the liquid crystal panel is covered with the board cover is exemplified. For example, an inverter board (light source driving board) for driving the light source, a control board, A power supply board that supplies power to the inverter board is referred to as a “circuit board”, and the board cover that covers the “circuit board” is positioned in the present invention.

  (2) In Embodiments 2 to 6 described above, the illustration of the configuration for attaching the stand to the reinforcing portion is omitted. However, as illustrated in Embodiment 1, the function of attaching the stand to the reinforcing portion is provided. Of course it is possible.

  (3) In addition to the first to sixth embodiments described above, the specific shape and size of the reinforcing portion can be changed as appropriate.

  (4) In Embodiment 3 to Embodiment 6 and Embodiment 8 described above, the substrate cover is slid from the upper side to the lower side in the vertical direction with respect to the chassis. However, on the contrary, the present invention also includes an arrangement in which the board cover is slid from the lower side to the upper side in the vertical direction with respect to the chassis.

  (5) In the above-described third to sixth to sixth and eighth embodiments, the substrate cover is slid along the vertical direction (Y-axis direction) with respect to the chassis when attaching and detaching. In addition, the present invention includes a configuration in which the substrate cover is slid along the horizontal direction (X-axis direction) perpendicular to the vertical direction with respect to the chassis when attaching and detaching.

  (6) In the first to sixth embodiments described above, the reinforcing part is fixed to the chassis by welding. However, the fixing method of the reinforcing part to the chassis can be changed as appropriate, such as a screw. It may be fixed with a fixing member, or may be fixed with an adhesive or the like.

  (7) In addition to the seventh and eighth embodiments described above, the specific shape, size, number of installations, and the like of the cabinet holding unit can be changed as appropriate.

  (8) In addition to the ninth embodiment described above, the specific shape, size, number of installations, and the like of the air holes can be changed as appropriate.

  (9) Besides the above-described embodiments, the specific shape and size of the substrate cover can be changed as appropriate.

  (10) In each of the above-described embodiments, a so-called direct-type backlight device in which a light source is disposed directly under the back surface of the liquid crystal panel has been illustrated. However, a light guide member that guides light from the light source directly under the back surface of the liquid crystal panel. The present invention can also be applied to a so-called edge-light type backlight device in which a light source is disposed opposite to the end of the light guide member.

  (11) In each of the above-described embodiments, a cold cathode tube that is a kind of linear light source is used as a light source. However, a hot cathode tube or the like can be used as another type of linear light source. Furthermore, it is of course possible to use a point light source such as an LED.

  (12) In each of the above-described embodiments, the liquid crystal panel and the chassis are vertically placed with the short side direction aligned with the vertical direction. However, the liquid crystal panel and the chassis have the long side direction in the vertical direction. Those that are in a vertically placed state matched with are also included in the present invention.

  (13) In each of the embodiments described above, a TFT is used as a switching element of a liquid crystal display device. However, the present invention can also be applied to a liquid crystal display device using a switching element other than TFT (for example, a thin film diode (TFD)). In addition to the liquid crystal display device for display, the present invention can also be applied to a liquid crystal display device for monochrome display.

  (14) In each of the above-described embodiments, the liquid crystal display device using the liquid crystal panel as the display panel has been exemplified. However, the present invention can be applied to display devices using other types of display panels.

  (15) In each of the above-described embodiments, the television receiver provided with the tuner has been exemplified. However, the present invention can also be applied to a display device that does not include the tuner.

  DESCRIPTION OF SYMBOLS 10,610 ... Liquid crystal display device (display device), 11 ... Liquid crystal panel (display panel), 12 ... Backlight device (illumination device), 14, 514, 614, 814 ... Chassis, 18 ... Cold cathode tube (light source), 23, 223, 623 ... control board (circuit board), 24, 124, 224, 324, 424, 524, 624, 724, 824 ... board cover, 24b, 124b, 324b ... one part, 24ba, 124ba, 324ba ... side face , 25, 125, 225, 325, 425, 525 ... reinforcing part (functional part), 25b, 125b ... second plate part (positioning part), 26 ... stand (support member), 27a ... locking recess (locking structure) ), 28a... Locking projection (locking structure), 29... Locking hole (locking structure), 31, 51, 331, 431, 531... Slide groove (groove), 31a, DESCRIPTION OF SYMBOLS 1a ... Groove edge (positioning part), 32, 52 ... Stopper part, 35, 435 ... 4th board part (positioning part), 37 ... Elastic locking piece (detachment prevention part), 40 ... Rising part (positioning part) , 42, 742 ... cabinet holding part (holding part, functional part), 53 ... vent hole (functional part), 53a ... inner edge part (positioning part), 56 ... insertion part, 127 ... bent part (locking structure) , Ca, Cb ... cabinet (exterior member), TV ... TV receiver

Claims (19)

A light source;
A chassis that houses the light source;
A circuit board attached to the chassis;
A board cover attached to the chassis and arranged to cover the circuit board;
A functional unit provided in the chassis;
An illuminating device provided with a positioning portion that is provided integrally with the functional portion and positions the substrate cover.   The lighting device according to claim 1, wherein the positioning portion regulates movement of the substrate cover in at least one direction along a plate surface of the circuit board.   The lighting device according to claim 2, wherein the board cover is attached to the chassis along a direction orthogonal to a plate surface of the circuit board.   The lighting device according to claim 3, wherein the board cover is provided with a piece projecting along a mounting direction with respect to the chassis and having a side surface directed to the positioning portion.   The illumination according to claim 4, wherein the positioning portion and the piece portion are provided with a locking structure that is locked to each other to restrict the movement of the substrate cover in a direction opposite to the mounting direction. apparatus.   The lighting device according to claim 2, wherein the board cover is attached to the chassis along a plate surface of the circuit board. The functional portion is provided with a groove portion that opens along the mounting direction of the substrate cover with respect to the chassis and can receive the substrate cover,
The lighting device according to claim 6, wherein the positioning portion is configured by a groove edge along the attachment direction in the groove portion.   A stopper portion that restricts movement of the substrate cover in the attachment direction by abutting against the substrate cover is provided on the back side of the groove portion of the groove portion in the attachment direction with respect to the substrate cover. The lighting device according to claim 7. At least when mounting the board cover, the chassis is arranged so that the plate surface of the circuit board is along the vertical direction,
The mounting direction of the substrate cover coincides with a direction from the upper side to the lower side of the vertical direction, and the stopper portion is disposed on the lower side of the vertical direction with respect to the substrate cover. The lighting device described.   Locking the substrate cover in the direction opposite to the attachment direction by locking the substrate cover on the near side of the attachment direction with respect to the substrate cover in the groove edge of the groove portion. The lighting device according to any one of claims 7 to 9, wherein a retaining portion is provided.   The lighting device according to claim 10, wherein the retaining portion includes an elastic locking piece that can be elastically locked to the substrate cover.   The said chassis is provided with the reinforcement part of the form extended along the edge | side, The said function part shall consist of the said reinforcement part in any one of Claims 1-11. The lighting device described.   The lighting device according to claim 12, wherein the reinforcing portions are arranged in a pair so as to be parallel to each other with a space therebetween, and the circuit board and the substrate cover are both arranged between the pair of reinforcing portions. .   The lighting device according to claim 12, wherein a support member that supports the chassis is provided, and the support member is attached to the reinforcing portion. An exterior member is provided for housing the light source and housing the chassis to which the circuit board and the board cover are attached;
The said chassis is provided with the holding | maintenance part for hold | maintaining the said exterior member, The said function part shall consist of the said holding | maintenance part. Lighting device.   The chassis is provided with a vent hole for allowing the inside and outside air to circulate, and the functional part is composed of the vent hole, and at least a part of a hole edge in the vent hole has the positioning part. Further, the substrate cover is provided with an insertion portion that is inserted into the vent hole and abutted against the positioning portion. Lighting equipment.   A display device comprising: the lighting device according to any one of claims 1 to 16; and a display panel that performs display using light from the lighting device.   The display device according to claim 17, wherein the display panel is a liquid crystal panel in which liquid crystal is sealed between a pair of substrates.   A television receiver comprising the display device according to claim 17 or 18.

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