WO2012073817A1

WO2012073817A1 - Illumination device, display device and television receiving device

Info

Publication number: WO2012073817A1
Application number: PCT/JP2011/077173
Authority: WO
Inventors: 良武石元
Original assignee: シャープ株式会社
Priority date: 2010-12-03
Filing date: 2011-11-25
Publication date: 2012-06-07

Abstract

The disclosed backlight device (24) is provided with: an LED light source (28); a chassis (22) having a bottom plate (22a) and side plates (22b, 22c), opening towards the front surface, and housing said LED light source (28); a frame (14) arranged on the open side of the chassis (22) and having an opposing surface (14a) opposite to the bottom plate (22a); an optical member (18) disposed between the bottom plate (22a) and the frame (14) and having a through-hole (18d); a housing block (36) arranged in a position opposite of the opposing surface (14a) of the bottom plate (22a) and having a housing hole (36a) opening towards the opposing surface (14a); a spring (38) housed in the housing hole (36a); and a support pin (34) housed in the housing hole (36a) with the intermediary spring (38), passing through the through-hole (36a) and having the tip (34a) in contact with the opposing surface (14a). The support pin (34) contacts the opposing surface (14a) while pressing thereon with the elastic force of the spring (38).

Description

Lighting device, display device, and television receiver

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

In recent years, display elements of image display devices such as television receivers are shifting from conventional cathode ray tubes to thin display devices to which thin display elements such as liquid crystal panels and plasma display panels are applied. Is possible. The liquid crystal display device requires a backlight device as a separate illumination device because the liquid crystal panel used for this does not emit light.

In the backlight device, an optical member made of a diffusion sheet or the like is used between the light source and the liquid crystal panel to convert the light from the light source into planar light. The optical member may thermally expand due to heat from the light source. When the optical member is thermally expanded, wrinkles are generated in the optical member, and a suitable luminance may not be obtained.

For example, a backlight device disclosed in Patent Document 1 is known as a backlight device that solves wrinkles generated in an optical member. In this backlight device, an engagement hole that penetrates the optical member is provided at the end of the optical member, and an elastic plate is provided at the edge of the housing that houses the light source. Then, by engaging the elastic plate with the elastic plate in an elastically deformed state, the optical member is supported by tension, and the generation of wrinkles in the optical member is prevented or suppressed.

JP 2008-66046 A

(Problems to be solved by the invention)
However, in the backlight device of Patent Document 1, there is a possibility that the optical member may come off from the tip of the elastic plate when vibration or impact is applied to the housing. If the optical member is detached from the elastic plate, the position of the optical member is shifted, and there is a possibility that a suitable luminance cannot be obtained.

The present invention has been created in view of the above problems. An object of this invention is to provide the illuminating device which can prevent thru | or suppress that the position of an optical member shifts | deviates.

(Means for solving problems)
The technology disclosed in the present specification includes a light source, a bottom plate, and a side plate that rises on one surface side of the bottom plate, and an accommodation member that opens to the one surface side and accommodates the light source; An opposing member disposed on the opening side of the housing member and having an opposing surface facing the bottom plate, an optical member disposed between the bottom plate and the opposing member, having a through hole, and the opposing surface of the bottom plate An accommodation base having an accommodation hole which is disposed in a portion facing the surface and opens on the facing surface side, an elastic body accommodated in the accommodation hole, and accommodated in the accommodation hole via the elastic body, the penetration A support pin that penetrates the hole and has a tip abutting against the opposing surface, and the support pin relates to an illumination device that abuts the opposing surface while pressing the opposing surface by an elastic force of the elastic body.

According to the illuminating device, since the opposing surface is arranged on the opening side of the housing member, the opposing surface is pressed against the tip of the supporting pin by the elastic force of the elastic body, so that there is a gap between the supporting pin and the opposing surface. Is prevented from occurring. For this reason, it is possible to prevent the optical member from being detached from the tip of the support pin and to prevent the position of the optical member from being shifted by arranging the opposing member with the support pin passing through the through hole of the optical member. Or can be suppressed.

A plurality of through holes may be provided in the optical member, and the plurality of support pins may penetrate each of the plurality of through holes.
According to this configuration, since the optical member is supported in the plurality of through holes, the optical member can be effectively supported.

The light guide plate further includes a light guide plate disposed between the bottom plate and the optical member, and guides light from the light source. The light guide plate has a positioning hole penetrating the plate surface. And the positioning hole may be penetrated.
According to this configuration, the light guide plate can be positioned by the storage table by passing the storage table through the positioning hole of the light guide plate.

A light guide plate disposed between the bottom plate and the optical member and guiding the light from the light source, the light guide plate having a positioning groove provided in a groove shape along its thickness direction; The storage table may have a columnar shape and may be fitted into the positioning groove.
According to this configuration, the light guide plate can be positioned by the receiving table by fitting the receiving table into the positioning groove of the light guide plate.

The end of the support pin opposite to the side in contact with the facing surface may be attached to the elastic body.
According to this configuration, since the support pin is attached to the elastic body accommodated in the accommodation hole of the accommodation table, it is possible to prevent or suppress the support pin from being detached from the accommodation table.

The natural length of the elastic body may be smaller than the height of the storage table.
According to this configuration, since the end opposite to the side in contact with the opposing surface of the support pin is accommodated in the accommodation hole of the accommodation table in a state where no elastic force is applied to the elastic body, the support pin is It is possible to prevent or suppress detachment from the storage table.

The opposing surface has a recess that opens to the support pin side and can be fitted with the tip of the support pin. The tip of the support pin fits with the recess and contacts the bottom surface of the recess. You may touch.
According to this structure, the front-end | tip of the support pin which contact | abutted the opposing surface can be stabilized by fitting the front-end | tip of a support pin with a recessed part.

The facing surface may face the tip of the support pin in parallel.
According to this configuration, since the tip of the support pin comes into contact with the opposing surface in parallel, the tip of the support pin in contact with the opposing surface can be stabilized.

The opposing member may have a frame shape and be placed on an edge of the side plate of the housing member.
According to this configuration, a specific configuration of the facing member can be realized.

The technology disclosed in this specification can also be expressed as a display device including a display panel that performs display using light from the above-described lighting device. A display device in which the display panel is a liquid crystal panel using liquid crystal is also new and useful. A television receiver provided with the above display device is also new and useful. According to the display device and the television set described above, the display area can be increased.

(The invention's effect)
According to the technique disclosed in this specification, it is possible to provide an illumination device that can prevent or suppress the displacement of the position of the optical member.

1 is an exploded perspective view of a television receiver TV according to Embodiment 1. FIG. An exploded perspective view of the liquid crystal display device 10 is shown. A cross-sectional view of the liquid crystal display device 10 is shown. The top view of the backlight apparatus 24 is shown. The side view which expanded the support pin 34 and the optical member 18 before the flame | frame 14 is attached to the chassis 22 is shown. The side view which expanded the support pin 34 and the optical member 18 before the flame | frame 14 is attached to the chassis 22 is shown. A sectional view of the storage table 36 and the support pin 34 is shown. Sectional drawing of the accommodation stand 136 and the support pin 134 which concern on Embodiment 2 is shown. The top view of the backlight apparatus 124 is shown. The top view of the backlight apparatus 224 which concerns on the modification of Embodiment 2 is shown. Sectional drawing of the storage stand 336 and the support pin 334 which concern on Embodiment 3 is shown. FIG. 6 shows a cross-sectional view of a liquid crystal display device 410 according to a fourth embodiment.

<Embodiment 1>
Embodiment 1 will be described with reference to the drawings. A part of each drawing shows an X-axis, a Y-axis, and a Z-axis, and each axis direction is drawn in a common direction 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.

FIG. 1 is an exploded perspective view of the television receiver TV according to the first embodiment. The television receiver TV includes a liquid crystal display device 10, front and back cabinets Ca and Cb that are accommodated so as to sandwich the display device D, a power source P, a tuner T, and a stand S.

FIG. 2 is an exploded perspective view of the liquid crystal display device 10. Here, the upper side shown in FIG. 2 is the front side, and the lower side is the back side. As shown in FIG. 2, the liquid crystal display device 10 has a horizontally long rectangular shape as a whole, and includes a liquid crystal panel 16 as a display panel and a backlight device 24 as an external light source, and these form a bezel having a frame shape. 12 and the like are integrally held.

Subsequently, the liquid crystal panel 16 will be described. The liquid crystal panel 16 has a configuration in which a pair of transparent (highly translucent) glass substrates are bonded together with a predetermined gap therebetween, and a liquid crystal layer (not shown) is sealed between the glass substrates. Is done. One glass 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, an alignment film, and the like. The substrate is provided with a color filter and counter electrodes in which colored portions such as R (red), G (green), and B (blue) are arranged in a predetermined arrangement, and an alignment film. Of these, image data and various control signals necessary for displaying an image are supplied to a source wiring, a gate wiring, a counter electrode, and the like from a drive circuit board (not shown). A polarizing plate (not shown) is disposed outside both glass substrates.

Subsequently, the backlight device 24 will be described. FIG. 3 shows a cross-sectional view of a cross section of the liquid crystal display device 10 cut along the vertical direction (Y-axis direction). As shown in FIGS. 2 and 3, the backlight device 24 includes a frame 14, an optical member 18, and a backlight chassis 22. The frame 14 has a frame shape and supports the liquid crystal panel 16 along the inner edge. The optical member 18 is placed on the front side of the light guide plate 20 (the light exit surface 20b side). The backlight chassis 22 has a substantially box shape opened to the front side (light emitting side, liquid crystal panel 16 side).

In the backlight chassis 22, an LED (Light Emitting Diode) unit 32, a reflection sheet 26, a light guide plate 20, and an accommodation table 36 in which support pins 34 are accommodated are accommodated. The LED unit 32 is disposed on one long side outer edge (side plate) 22b of the backlight chassis 22 and emits light. A longitudinal side surface (light incident surface) 20a of the light guide plate 20 is disposed at a position facing the LED unit 32, and guides light emitted from the LED unit 32 to the liquid crystal panel 16 side. The optical member 18 is placed on the front side of the light guide plate 20. In the backlight device 24 according to the present embodiment, the light guide plate 20 and the optical member 18 are disposed directly below the liquid crystal panel 16 and the LED unit 32 that is a light source is disposed on the side end of the light guide plate 20. A so-called edge light system (side light system) is adopted.

The backlight chassis 22 is made of a metal such as an aluminum material, for example, and has a bottom plate 22a having a rectangular shape in plan view,

side plates

22b and 22c rising from outer edges of both long sides of the bottom plate 22a, and both short sides of the bottom plate 22a. It is comprised from the side plate which stands up from each outer edge. A space facing the LED unit 32 and the storage base 36 in the backlight chassis 22 is a storage space for the light guide plate 20. A power circuit board (not shown) for supplying power to the LED unit 32 is attached to the back side of the bottom plate 22a.

The optical member 18 is formed by laminating a diffusion sheet 18a, a lens sheet 18b, and a reflective polarizing plate 18c in order from the light guide plate 20 side. The diffusion sheet 18a, the lens sheet 18b, and the reflective polarizing plate 18c have a function of converting light emitted from the LED unit 32 and passing through the light guide plate 20 into planar light. A liquid crystal panel 16 is installed on the upper surface side of the reflective polarizing plate 18 d, and the optical member 18 is disposed between the light guide plate 20 and the liquid crystal panel 16.

The LED unit 32 has a configuration in which LED light sources 28 that emit white light are arranged in a row on a resin-made rectangular LED board 30. The LED substrate 30 is fixed to the

side plates

22b and 22c of the backlight chassis 22 by screwing or the like. The LED light source 28 may emit white light by applying a phosphor having a light emission peak in a yellow region to a blue light emitting element. Alternatively, the blue light emitting element may emit white light by applying a phosphor having emission peaks in the green and red regions. Further, a phosphor having a light emission peak in a green region may be applied to a blue light emitting element, and white light may be emitted by combining a red light emitting element. The LED light source 28 may emit white light by combining a blue light emitting element, a green light emitting element, and a red light emitting element. Further, a combination of an ultraviolet light emitting element and a phosphor may be used. In particular, an ultraviolet light-emitting element may emit white light by applying a phosphor having emission peaks in blue, green, and red, respectively.

The reflection sheet 26 is made of synthetic resin, the surface thereof is white with excellent light reflectivity, and is placed on the front side of the bottom plate 22 a of the backlight chassis 22. The reflection sheet 26 has a reflection surface on the front side, and this reflection surface is in contact with the opposite surface 20c of the light guide plate 20, and light leaked from the

LED units

32, 32 or the light guide plate 20 to the opposite surface 20c side. It can be reflected.

The light guide plate 20 is a rectangular plate-like member, is formed of a resin having high translucency (high transparency) such as acrylic, and is in contact with the reflection sheet 26 and supported by the backlight chassis 22. Has been. As shown in FIG. 2, the light guide plate 20 has a light output surface 20b, which is the main plate surface, facing the diffusion sheet 18a between the LED unit 26 and one side plate 22c of the backlight chassis 22, and the light output surface 20b. It arrange | positions in the form which orient | assigns the opposite surface 20c of the opposite side to the reflection sheet 26 side. By arranging such a light guide plate 20, the light generated from the LED unit 32 enters the light entrance surface 20 a of the light guide plate 20 and exits from the light exit surface 20 b facing the diffusion sheet 18 a, The liquid crystal panel 16 is irradiated from the back side.

Subsequently, the structure of the storage table 36, the support pins 34 stored in the storage table 36, and the support structure of the optical member 18 will be described. FIG. 4 shows a plan view of the backlight device 24. As shown in FIG. 2, the accommodation table 36 has a truncated cone shape in which the support pins 34 are accommodated from above, and the LED unit 32 is arranged on the outer edge (side plate) on the long side of the chassis 22. It is arranged on the non-side (side plate 22c side) and is fixed to the bottom plate 22a of the chassis 22 by screwing or the like. As shown in FIG. 4, the chassis 22 is disposed at two locations on both sides along the X-axis direction on the side plate 22 c side of the chassis 22.

As shown in FIG. 3, a housing hole 36 a having an opening 36 b (see FIGS. 5 and 6) that opens upward is formed in the housing table 36. The accommodation hole 36 a has a cylindrical shape extending in the thickness direction (Z-axis direction) of the light guide plate 20, and a spring 38 whose one end is in contact with the bottom plate 22 a of the chassis 22 is accommodated therein. The support pin 34 is accommodated in the accommodation hole 36 a via a spring 38, and the tip thereof is exposed above the accommodation table 36. The front end surface 34 a of the support pin 34 is parallel to the bottom plate 22 a of the chassis 22.

On the other hand, the opposed surface 14a of the frame 14 that faces the bottom plate 22a and the support pins 34 of the chassis 22 is parallel to the bottom plate 22a of the chassis 22. For this reason, the front end surface 34 a of the support pin 34 abuts in parallel with the facing surface 14 a of the frame 14. In the state where the frame 14 is placed on the opening side of the chassis 22, the tip surface 34 a of the support pin 34 comes into contact with the opposing surface, so that the spring 38 is contracted from its natural length. As a result, the front end surface 34 a of the support pin 34 abuts against the opposing surface while pressing the opposing surface 14 a of the frame 14 by the elastic force of the spring 38.

Further, as shown in FIG. 4, one side plate 22 c of the chassis 22 overlaps with the support pin 34 in a portion of the optical member 18 facing the one side plate 22 c of the chassis 22 on which the receiving table 36 is provided. Two extending portions 18e extending to the side are provided. At the center of the extending portion 18e, through holes 18d that penetrate the optical member 18 and through which the support pins 34 can pass are provided. And the support pin 34 has penetrated the through-hole 18d, and, thereby, the optical member 18 is supported by the plane direction (XY plane direction). In addition, the optical member 18 is supported by the support pins 34 in the Z-axis direction as well because the front end surface 34 a of the support pin 34 abuts against the facing surface 14 a of the frame 14.

Next, the operations and functions of the storage table 36 and the support pins 34 will be described. FIG. 5 shows an enlarged side view of the support pins 34 and the optical member 18 before the frame 14 is attached to the chassis 22. FIG. 6 shows an enlarged side view of the support pins 34 and the optical member 18 before the frame 14 is attached to the chassis 22. FIG. 7 shows a cross-sectional view of the storage table 36 and the support pins 34.

As shown in FIG. 5, before the frame 14 is attached to the chassis 22, the support pin 34 is accommodated in the accommodation hole 36 a via the spring 38, so that the tip surface 34 a of the support pin 34 is the optical member 18. It is located above the through hole 18d. When the frame 14 is attached to the chassis 22, as shown in FIG. 6, the front end surface 34 a of the support pin 34 abuts against the facing surface 14 a of the frame 14 and is pushed downward, thereby contracting the spring 38. . The spring 38 contracted from the natural length state tends to push the support pin 34 upward by its elastic force. As a result, the tip surface 34 a of the support pin 34 abuts against the facing surface 14 a while pressing the facing surface 14 a of the frame 14.

Further, as shown in FIG. 7, before the frame 14 is attached to the chassis 22, the natural length L 1 of the spring 38 is set to be smaller than the height L 2 of the storage table 36. For this reason, before the frame 14 is attached to the chassis 22, the end portions 34 b of the support pins are accommodated in the accommodation holes. Thereby, it is prevented that the support pin 34 remove | deviates from the accommodation hole 36a. Further, the end 34 b of the support pin 34 opposite to the side facing the facing surface 14 a is attached to the tip of the spring 38. For this reason, the support pin 34 is prevented from being separated from the spring 38.

Now, in the backlight device 24 according to the present embodiment, the tip surface 34a of the support pin 34 abuts against the facing surface 14a while pressing the facing surface 14a of the frame 14, so the tip surface 34a and the facing surface 14a of the support pin 34 are in contact. It is possible to prevent a gap from being generated. For this reason, the optical member 18 is not detached from the front end surface of the support pin 34, and the optical member 18 is prevented from being displaced. For this reason, the backlight device 24 can obtain a suitable luminance on the display surface of the liquid crystal panel 16.

As described above, in the backlight device 24 according to the present embodiment, the opposing surface 14 a is pressed against the tip 34 a of the support pin 34 by the elastic force of the spring 38 by arranging the frame 14 on the opening side of the chassis 22. Therefore, a gap is prevented from being generated between the support pin 34 and the facing surface 14a. For this reason, by arranging the frame 14 with the support pin 34 penetrating through the through hole 18d of the optical member 18, the optical member 18 can be prevented from being detached from the tip of the support pin 34. The displacement can be prevented or suppressed.

Further, in the conventional backlight device in which the elastic plate is engaged with the engagement hole provided in the optical member, there is a problem that the thickness of the backlight device is increased by providing the elastic plate at the edge of the chassis. . On the other hand, in the backlight device 24 according to the present embodiment, since the support pins 34 are attached to the bottom plate 22a of the chassis 22 instead of the edge of the chassis 22, the thickness of the chassis 22 does not increase and is thin. The backlight device 24 can be realized.

Further, in the conventional backlight device in which the elastic plate is engaged with the engagement holes provided in the optical member, the engagement holes are provided on a plurality of sides of the optical member in order to support the optical member with uniform tension. There is a need. On the other hand, in the backlight device 24 according to the present embodiment, the optical member 18 can be supported only by providing the through hole 18d on one side of the optical member 18.

Further, in the backlight device 24 according to the present embodiment, the optical member 18 is provided with two through holes 18d, and the two support pins 34 pass through each of the two through holes 18d. For this reason, the optical member 18 is supported in the two through holes 18d, and the optical member 18 can be effectively supported.

Further, in the backlight device 24 according to the present embodiment, the end portion 34 a opposite to the side that contacts the facing surface 14 a of the support pin 34 is attached to the spring 38. As a result, the support pins 34 are attached to the springs 38 accommodated in the accommodation holes 36 a of the accommodation table 36, so that the support pins 34 can be prevented or suppressed from being detached from the accommodation table 36.

Further, in the backlight device 24 according to the present embodiment, the natural length L1 of the spring 38 in a state in which the support pin 34 is attached is set to be smaller than the height L2 of the accommodating table 36. As a result, in the state where no elastic force is applied to the spring 38, the end portion 34 b (the end portion on the side attached to the spring 38) on the opposite side to the side in contact with the facing surface 14 a of the support pin 34 is the accommodation table 36. Accordingly, the support pin 34 can be prevented or suppressed from being detached from the storage base 36.

Further, in the backlight device 24 according to the present embodiment, the facing surface 14a faces the tip 34a of the support pin 34 in parallel. As a result, the tip 34a of the support pin 34 comes into contact with the opposing surface 14a in parallel, so that the tip 34a of the support pin 34 in contact with the opposing surface 14a can be stabilized.

In the backlight device 24 according to the present embodiment, the frame 14 has a frame shape and is reworked on the edge of the chassis 22. For this reason, a specific configuration of the frame 14 is realized.

<Embodiment 2>
A second embodiment will be described with reference to the drawings. FIG. 8 is a cross-sectional view of the storage table 136 and the support pins 134 according to the second embodiment. FIG. 9 shows a plan view of the backlight device 124. FIG. 10 is a plan view of a backlight device 224 according to a modification of the second embodiment. In FIGS. 9 and 10, the optical member is not shown, and the

light guide plates

120 and 220 are viewed from the front side. The second embodiment is different from the first embodiment in that the support pins 134 and 234 have a function of positioning the

light guide plates

120 and 220. Since other configurations are the same as those of the first embodiment, description of the structure, operation, and effect is omitted.

In the backlight device according to the second embodiment, as shown in FIGS. 8 and 9, the support stand 136 has a columnar shape. A columnar accommodation hole is formed in the support stand 136 as in the first embodiment, and a support pin 134 is accommodated in the accommodation hole via a spring 138.

On the other hand, in the portion of the light guide plate 120 facing the one side plate of the chassis 122 provided with the receiving table 136, as shown in FIG. 9, on the one side plate side of the chassis 122 so as to overlap the receiving table 136. Two positioning grooves 120d that open are provided. The positioning groove 120 d is provided along the thickness direction (Z-axis direction) of the light guide plate 120, and has a size that can be fitted to the receiving table 136. In the state where the light guide plate 120 is accommodated in the chassis 122, the positioning groove 120 d is fitted to the accommodation stand 136. Thereby, the light guide plate 120 is configured to be positioned in the plane direction (XY plane direction) by the accommodating table 136. As described above, in the backlight device according to the second embodiment, the storage stand 136 can be used not only as a member for storing the support pins 134 but also as a member for positioning the light guide plate 120. .

Further, as a modification of the second embodiment, a positioning hole as shown in FIG. 10 can be used instead of the positioning groove. In the backlight device according to this modification, as shown in FIG. 10, the light guide plate 220 penetrates the plate surface of the light guide plate 20 in the thickness direction (Z-axis direction) so as to overlap the light receiving plate 236. Two positioning holes 220d that can be fitted to the H.236 are provided. In the state where the light guide plate 220 is accommodated in the chassis 222, the positioning hole 220 d is fitted to the accommodation base 236. Even in such a configuration, the light guide plate 220 can be configured to be positioned in the plane direction (XY plane direction) by the receiving table 236, and the receiving table 236 can be used as a member for receiving the support pins 234. In addition, the light guide plate 220 can be used as a member for positioning.

<Embodiment 3>
Embodiment 3 will be described with reference to the drawings. FIG. 11 is a cross-sectional view of the storage table 336 and the support pins 334 according to the third embodiment. In the third embodiment, the configuration of the elastic body accommodated in the accommodation hole of the support base 336 is different from that of the first embodiment. Since other configurations are the same as those of the first embodiment, description of the structure, operation, and effect is omitted. In FIG. 11, the part obtained by adding the numeral 300 to the reference numeral in FIG. 7 is the same as the part described in the first embodiment.

In the backlight device according to Embodiment 3, a cushion material 338 is used as an elastic body accommodated in the accommodation hole. Even in such a configuration, by disposing the frame on the opening side of the chassis, the distal end surface 334a of the support pin 334 abuts the opposing surface while pressing the opposing surface of the frame by the elastic force of the cushion material 338. Therefore, the position of the optical member can be prevented or suppressed from shifting.

<Embodiment 4>
Embodiment 4 will be described with reference to the drawings. FIG. 12 is a sectional view of the liquid crystal display device 410 according to the fourth embodiment. The fourth embodiment is different from the first embodiment in that the tip surface 434a of the support pin 434 is in contact with the facing surface 414a of the frame 414. Since other configurations are the same as those of the first embodiment, description of the structure, operation, and effect is omitted. In FIG. 12, the part obtained by adding the numeral 400 to the reference numeral in FIG. 3 is the same as the part described in the first embodiment.

In the backlight device 424 according to the fourth embodiment, a concave portion 414b that opens downward and fits with the tip of the support pin 434 is formed on the facing surface 414a of the frame 414. In the state where the frame 414 is attached to the chassis 422, the tip of the support pin 434 is engaged with the recess 414b, and the tip surface is in contact with the bottom surface 414b1 of the recess 414b. For this reason, in the backlight device 424 according to Embodiment 4, the tip of the support pin 434 in contact with the opposing surface 414a can be stabilized by fitting the tip of the support pin 434 with the recess 414b.

The correspondence between the configuration of each embodiment and the configuration of the present invention is described. The LED light sources 28 and 128 are examples of “light sources”. The

chassis

22, 122, 222, 422 are examples of “accommodating members”. The

frames

14 and 424 are examples of “opposing members”. The

springs

38, 128, 428 and the cushion material 328 are examples of the “elastic body”. The

backlight devices

24, 124, 224, and 424 are examples of “illumination devices”.

The modifications of the above embodiments are listed below.
(1) In each of the above-described embodiments, a configuration in which a spring or a cushion material is used as an elastic body is adopted. Good.

(2) In each of the above-described embodiments, a configuration in which two storage bases and support pins are stored in the chassis is employed. However, the number of storage bases and support pins stored in the chassis is not limited. For example, a configuration in which one accommodating table and support pins are accommodated in the chassis may be employed, or a configuration in which three or more accommodating tables and support pins are accommodated in the chassis may be employed. The number of through holes provided in the optical member is not limited.

(3) In each of the above embodiments, the edge light type backlight device is employed. However, for example, a direct type backlight device may be employed.

(4) In addition to the above-described embodiments, the configuration in which the tip of the support pin contacts the opposing surface can be changed as appropriate.

(5) In addition to the above embodiments, the configuration in which the support pin supports the optical member by passing through the through hole of the optical member can be appropriately changed.

(6) In addition to the above embodiments, the configuration in which the support pins are accommodated in the accommodation holes of the accommodation table can be appropriately changed.

(7) In each of the above embodiments, a liquid crystal display device using a liquid crystal panel as the display panel has been illustrated, but the present invention can also be applied to display devices using other types of display panels.

(8) In each of the above 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.

As mentioned above, although each embodiment of this invention was described in detail, these are only illustrations and do not limit a claim. The technology described in the claims includes various modifications and changes of the specific examples illustrated above.

Further, the technical elements described in this specification or the drawings exhibit technical usefulness alone or in various combinations, and are not limited to the combinations described in the claims at the time of filing. In addition, the technology exemplified in this specification or the drawings can achieve a plurality of objects at the same time, and has technical usefulness by achieving one of the objects.

TV: TV receiver, Ca, Cb: cabinet, T: tuner, S: stand, 10, 410: liquid crystal display device, 12, 412: bezel, 14, 414: frame, 16, 416: liquid crystal panel, 18, 418 : Optical member, 20, 120, 220, 420: Light guide plate, 22, 122, 222, 422: Chassis, 24, 424: Backlight device, 26, 426: Reflective sheet, 28, 128, 228, 428: LED light source , 30, 130, 230, 430: LED board, 32, 132, 232: LED unit, 34, 134, 234, 334, 434: support pins, 36, 136, 236, 336, 436: receiving table, 38, 138 438: Spring, 338: Cushion material

Claims

A light source;
A bottom plate, and a side plate that rises on one side of the bottom plate, and an accommodation member that opens to the one side and accommodates the light source;
An opposing member disposed on the opening side of the housing member and having an opposing surface facing the bottom plate;
An optical member disposed between the bottom plate and the opposing member and having a through hole;
An accommodation table having an accommodation hole that is disposed in a portion of the bottom plate facing the facing surface and opens to the facing surface;
An elastic body accommodated in the accommodation hole;
A support pin that is accommodated in the accommodation hole via the elastic body, penetrates the through-hole, and has a tip abutting against the opposing surface;
The lighting device according to claim 1, wherein the support pin is in contact with the facing surface while pressing the facing surface by an elastic force of the elastic body.
A plurality of through holes are provided in the optical member,
The lighting device according to claim 1, wherein the plurality of support pins penetrate each of the plurality of through holes.
A light guide plate that is disposed between the bottom plate and the optical member and guides light from the light source;
The light guide plate has a positioning hole penetrating the plate surface;
The lighting device according to claim 1, wherein the receiving table has a columnar shape and penetrates the positioning hole.
A light guide plate that is disposed between the bottom plate and the optical member and guides light from the light source;
The light guide plate has positioning grooves provided in a groove shape along the thickness direction thereof,
The lighting device according to claim 1, wherein the receiving table has a columnar shape and is fitted in the positioning groove.
The lighting device according to any one of claims 1 to 4, wherein an end of the support pin opposite to a side in contact with the facing surface is attached to the elastic body.
The lighting device according to any one of claims 1 to 5, wherein a natural length of the elastic body is smaller than a height of the accommodating table.
The opposing surface has a recess that opens to the support pin side and can be fitted to the tip of the support pin;
The lighting device according to any one of claims 1 to 6, wherein the tip of the support pin is fitted into the recess and is in contact with a bottom surface of the recess.
The lighting device according to any one of claims 1 to 7, wherein the facing surface faces the tip of the support pin in parallel.
The lighting device according to any one of claims 1 to 8, wherein the facing member has a frame shape and is placed on an edge of the side plate of the housing member.
A display device comprising a display panel that performs display using light from the illumination device according to any one of claims 1 to 9.
The display device according to claim 10, wherein the display panel is a liquid crystal panel using liquid crystal.
A television receiver comprising the display device according to claim 10 or 11.