The present invention relates to a display device and to a television receiver.
Liquid crystal display device such as liquid crystal televisions, for example, need a separate backlight device as the illumination device, because their display panels, which are liquid crystal panels, do not emit light by themselves. Backlight devices of this kind of liquid crystal display devices are roughly classified into a direct-lit type and an edge-lit type. The edge-lit type backlight devices are considered desirable for further slimming of liquid crystal display devices.
A known configuration for the liquid crystal display devices equipped with an edge-lit type backlight device is the following: notch-like recesses (or protrusions) are provided on edge surfaces of the light guide plate, and protrusions (or recesses) are provided at locations that are a part of the housing and that correspond to the locations of the recesses (or the protrusions). By making the recesses and the protrusions engage, within the housing, the light guide plate is aligned in the direction of its plate surface. Liquid crystal display devices having such a light guide plate alignment configuration are disclosed, for example, in Patent Document 1.
Patent Document 1: Japanese Patent Application Laid-Open Publication No. 2004-296193
In recent years, for manufacturing cost reduction and to meet demands for further slimmed-down designs, discontinuation of the synthetic resin cabinet, which is an exterior part of liquid crystal display units, is being considered. However, for liquid crystal display devices that do not have such a cabinet, the light guide plate alignment configuration described above can allow light leaking through the spaces between the recesses and protrusions to enter inside through the edge surface of the liquid crystal panel. In this case, excessively bright areas (bright spots) can appear on the display surface of the liquid crystal panel, lowering the visibility of the display surface.
The technologies disclosed in this specification were devised in consideration of the problem described above. This specification aims at providing technologies that realize a configuration that aligns the light guide plate in the direction of its plate surface, but at the same time, prevents light emitted from the light source from entering inside through the edge surface of the display panel.
The technology disclosed in this specification relates to a display device that includes: a light source; a light source substrate having the light source on one surface thereof; a display panel that uses light from the light source to perform display; a light guide plate having one surface as a light exiting surface, another plate surface as an opposite surface that is opposite to the light exiting surface, and at least one light receiving face on a side, the light guide plate being disposed such that the light exiting surface faces a side of the display panel opposite to a display surface thereof and such that the light receiving face faces the light source so as to guide light from the light source towards the display panel; a chassis disposed on an opposite surface side of the light guide plate; a frame having a frame-like shape disposed on a display surface side of the display panel and sandwiching, together with the chassis, at least the display panel, the light source, and the light guide plate therebetween; and a clamping member that holds the light source substrate, clamps an edge of the light guide plate on a light receiving face side thereof, and covers at least a display panel of the light source, the clamping member being supported by at least the frame so as to fix a position of the light guide plate with respect to the frame.
According to the display device described above, in the manufacturing process, the light source substrate with the light source disposed thereon is attached to the clamping member. After this, periphery of the light guide plate, the periphery being located beside the light receiving face, is sandwiched by the clamping member, by which the sandwich member is attached to the light guide plate. Then, the clamping member sandwiching the light guide plate is disposed to be supported against the frame. The light guide plate can then be aligned against the frame in the direction of its plate surface. Thus, without the need to provide recesses or protrusions on the edge surface of the light guide plate, the light guide plate can be aligned by an alignment member in the direction of its plate surface. Furthermore, because the clamping member is configured to cover the display panel side of the light source, the light emitted from the light source and then guided toward the display panel is blocked by the clamping member. As a result, a configuration that aligns the light guide plate in the direction of its plate surface is realized, yet light emitted from the light source can be prevented from entering inside through the edge surface of the display panel.
The clamping member may be able to be divided into two members in a thickness direction of the light guide plate, the clamping member being constituted of a frame-side member facing the frame and a chassis-side member facing the chassis.
According to this configuration, if, for example, the light source stops emitting light after the light source substrate is attached to the clamping member, the light source can easily be replaced, because the clamping member is divisible into two. This configuration can thus improve the efficiency of works such as parts replacement. Furthermore, because the clamping member is divisible into two, work efficiency when assembling a large display device can also be improved.
The display device may further include a locking piece disposed on either one of the frame-side member or the chassis-side member and protruding towards the other of the frame-side member or the chassis-side member; and a locking hole in the other of the frame-side member or the chassis-side member at a location facing the engaging piece, the locking hole opening towards the locking piece, wherein the locking piece engages the locking hole to assemble the frame-side member and the chassis-side member.
As described above, according to the configuration in which the frame side member and the chassis side member are assembled to each other when the locking piece is caught by the locking hole, the frame side member and the chassis side member can easily be assembled, and the assembled frame side member and the chassis side member can be hard to be separated.
The light receiving face may have a rectangular shape with a short side direction thereof being the thickness direction of the light guide plate, and the clamping member may be able to be further divided along a long side direction of the light receiving face.
According to this configuration, the clamping member is divisible into four. As a result, efficiency in works such as parts replacement and assembly of a large display device can further be improved.
The display device may further include a spring member at a connecting point of the frame-side member and the chassis-side member, the spring member respectively actuating the frame-side member and the chassis-side member to assemble the frame-side member and the chassis-side member.
According to this configuration, the clamping member can be divided into two members: the frame side member and the chassis side member, while these members still stay connected to each other by the spring member. As a result, in the manufacturing process of a liquid crystal display device, the frame side member and the chassis side member can easily be engaged and disengaged.
The light receiving face may have a rectangular shape with a short side direction thereof being a thickness direction of the light guide plate, and protrusions that protrude towards the light guide plate may be provided on the clamping member at respective locations where the light guide plate is clamped, the protrusions extending along a long side direction of the light receiving face, and grooves may be provided in the light receiving face of the light guide plate on both long side directions thereof and have a trench-like shape along the long side directions, the grooves being provided in the light guide plate at locations facing the protrusions and being able to engage the protrusions.
According to this configuration, the clamping member can easily be attached to the light guide plate by engaging the protrusions with the groove section from the opening of the groove section, and then by sliding the light guide plate along the direction in which the protrusion extends or by sliding the clamping member along the direction in which the groove section extends.
The display device may further include a buffer member between the clamping member and the light guide plate at a location where the light guide plate is clamped, the buffer member being softer than the clamping member.
Because the clamping member sandwiches the light guide plate, when a pressure is applied on the light exiting surface and the reverse surface of the light guide plate, a squeaking sound and the like can be generated. According to the configuration described above, because the pressure applied from the clamping member onto the light exiting surface and onto the reverse surface of the light guide plate can be reduced by the buffer member, the squeaking sound and the like can be suppressed.
The clamping member may be secured to the chassis with screws.
According to this configuration, because the clamping member can be secured to the chassis by tightening screws, it is possible to make it hard for the clamping member to be misaligned not only against the frame but also against the chassis.
The clamping member may be a metal having a thermal conductivity that is at least the same as that of the chassis, and the clamping member may include a portion covering a chassis side of the light source, the portion abutting the chassis.
According to this configuration, heat generated near the light source is effectively dissipated from the light source substrate to the chassis side through the clamping member, which is made of a metal. As a result, good thermal dissipation can be obtained.
The display device may further include a support rib provided on the frame at a location exposed to the clamping member, the support rib extending towards the clamping member, and a fitting recess may be provided in the clamping member at a location facing the support rib, the fitting recess being able to engage the support rib.
According to this configuration, a leading end portion of the support rib engages the fitting recess, and therefore the clamping member is supported against the frame. Consequently, a specific configuration that makes the clamping member to be supported against the frame can be realized.
The support ribs may be provided along the edge of the light exiting surface on a light receiving face side with gaps therebetween.
According to this configuration, if flexible substrates or the like are attached to the periphery of the display panel, flexible substrates can be disposed between the support ribs that are intermittently disposed, so that the support ribs and the flexible substrates do not interfere each other. Thus, in the case that other members are disposed near the support ribs, it is possible to make it hard for the other members and the support ribs to interfere each other.
The clamping member may have a projection that protrudes toward the light source at a location exposed to the light source and an abutting surface that abuts a surface of the light source substrate opposite to the one surface on which the light source is disposed, and the light source substrate may be held by being clamped by the projection and the abutting surface in a thickness direction of the light source substrate.
According to this configuration, the light source substrate can easily be held against the clamping member by placing the light source substrate between the abutting surface and the projection, and sliding the light source substrate along the direction in which the abutting surface and the projection extend.
A portion of the projection opposite to a side abutting the light source substrate may be located closer to the light receiving face than a light emitting surface of the light source.
According to this configuration, if the light receiving face of the light guide plate moves toward the light source due to causes such as thermal expansion, the light receiving face touches the projection before it touches the light source. As a result, the light-emitting surface of the light source can be prevented from being damaged or the like by contact of the light receiving face with the light source.
According to the technologies disclosed in this specification, a display device where the display panel described above is a liquid crystal panel using liquid crystals is novel and useful. Also, a television receiver including the display device described above is novel and useful.
According to the technologies disclosed in this specification, a configuration that aligns the light guide plate in the direction of its plate surface is realized, but at the same time, light emitted from a light source can be prevented from entering inside through the edge surface of a display panel.
Embodiment 1 is described with reference to figures. In this embodiment, a liquid crystal display device 10 is shown as an example. In some figures, X, Y, and Z axes are shown. Each of the axes indicates the same direction throughout the figures. The direction of Y axis matches the vertical direction, and the direction of X axis matches the horizontal direction. Unless otherwise stated, up and down positions are described based on the vertical direction.
A television receiver TV includes a liquid crystal display unit LDU; substrates PWB, MB, and CTB that are attached to the back face side (rear face side) of the liquid crystal display unit LDU; a cover member CV that is installed to the back face side of the liquid crystal display unit LDU such that it covers the substrates PWB, MB, and CTB; and a stand ST. The stand ST holds the liquid crystal display unit LDU such that the display surface of the liquid crystal display unit LDU extends along the vertical direction (Y-axis direction). The liquid crystal display device 10 according to the present embodiment is a television receiver TV configured as described above minus, at least, structures for receiving television signals (a tuner section of the main substrate MB, and the like). As shown in
First, the configuration of the back face side of the liquid crystal display device 10 is described. As shown in
As shown in
As shown in
As shown in
As shown in
The light guide plate 16 is made of a synthetic resin material that has a sufficiently higher refractive index than air and is substantially crystal clear (highly transparent), such as an acrylic resin (PMMA, for example) and polycarbonate. As shown in
Among the main surfaces of the light guide plate 16, the surface facing the front side (the surface facing the optical members 15) is a light exiting surface 16a from which the light inside the light guide plate is emitted towards the optical member 15 and towards the liquid crystal panel 11. Among outer peripheral edge surfaces located adjacent to the main surfaces of the light guide plate 16, both edge surfaces that are located on the long side, along the X axis direction (both edge surfaces that belong to the pair of edges located apart along the short side direction), are disposed such that they squarely face the corresponding LED 17 (LED substrate 18) with a specified space provided in between. These edge surfaces are a pair of light receiving faces 16b through which light emitted from the LED 17 enters inside. As shown in
The reflective sheet 20 is disposed slightly away from a front face 14a of the chassis 14, but abuts the reverse surface 16c of the light guide plate 16 so that light leaking outside at the back through the reverse surface 16c of the light guide plate 16 can be reflected and be guided back towards the front side. The reflective sheet 20 is made of a synthetic resin, and the color of its surface is white, which is a highly light reflective color. The short side dimension of the reflective sheet 20 is smaller than the short side dimension of the light guide plate 16.
Next, configurations of the LED 17 and the LED substrate 18, which constitute a unified unit UU, are described one by one. The configuration of the clamping member 30, which is another constituting member of the unified unit UU, is described in detail below. The LED 17, which constitutes the unified unit UU, is configured such that LED chips (not shown) are sealed by resin onto a substrate section that is fixed to the LED substrate 18. LED chips mounted on the substrate section emit light with a single emission wavelength, which, specifically, is blue. On the other hand, the resin that seals the LED chips includes a dispersed phosphor substance that emits a specified color when excited by the blue light emitted from the LED chips, producing, overall, approximately white light. For the phosphor substance, any one of, or any appropriate combination of, for example, a yellow phosphor substance that emits yellow light, a green phosphor substance that emits green light, and a red phosphor substance that emits red light can be used. The LED 17 is of a so-called top surface light-emitting type, where the surface of LED 17 that is located opposite to the mounting surface facing the LED substrate 18 (i.e., the surface that squarely faces the light receiving face 16b of the light guide plate 16) is a light-emitting surface 17a.
As shown in
Next, configurations of the frame 13 and the chassis 14 that constitute the exterior members and the support members are described. Both the frame 13 and the chassis 14 are made of a metal such as aluminum, and have more mechanical strength (rigidity) and higher thermal conductivity compared to those made of a synthetic resin. As shown in
As shown in
The frame 13, which is configured as described above and has a frame-like shape, is an assembly of four frame segments for respective sides (for each of the long side sections and for each of the short side sections). More precisely, the frame segments are a pair of long-side frame segments constituting the long side sections of the frame 13 and a pair of short-side frame segments constituting the short side sections of the frame 13 (the frame 13 is composed of the panel holding section 13a and the side wall section 13b).
As shown in
Provided at a location that is slightly more inward from the side wall section 13b, but is more outward than a location that, in a plan view, is overlapped by the LED substrate 18, is a support rib 13c extending, in a manner similar to a rib, from the back face of the panel holding section 13a toward the clamping member 30 described below. Support ribs 13c are integrally formed with the panel holding section 13a, and are disposed intermittently along the long side direction of the light guide plate 16 (along the X axis direction). The leading end portion of the support rib 13c engages a fitting recess 31a1 provided in the clamping member 30 (described later), which enables the support rib 13c to support the clamping member 30.
As shown in
As shown in
Next, the configuration of the clamping member 30 that constitutes the unified unit UU, and the form of assembling the clamping member 30, which are the main parts of the present embodiment, are described. As described above, for each of the pair of light receiving faces 16b provided along the long sides of the light guide plate 16, a clamping member 30 is disposed such that it faces the light receiving face 16b. The clamping member 30 is made of a metal having a thermal conductivity that is at least equivalent to that of the chassis 14, and the direction of its long side matches the direction of X axis, and the its long side dimension is about the same as the long side dimension of the LED substrate 18. Also, a portion of the clamping member 30 sandwiches a periphery of the light guide plate 16, the periphery being located beside the light receiving face 16a, in the thickness direction of the light guide plate (Z axis direction). The clamping member 30 is constituted of main sections 31a and 32a, extension sections 31c and 32c, and projections 31b and 32b.
As shown in
As shown in
Projections 31b and 32b that constitute the clamping member 30 are each formed on the inside surface of extension sections 31c and 32c (the surface that faces the LED 17). Each protrudes towards the LED 17 from the inside surface along the inside surface up to a point that is located slightly more inwards than the LEDs 17 (closer to the light guide plate 16), and also extends in the X axis direction. The LED substrate 18 is disposed between the main sections 31a and 32a, and the projections 31b and 32b. Because of the presence of the projections 31b and 32b, concave grooves are formed between the main sections 31a and 32a, and the projections 31b and 32b. The concave grooves have a width (the width extends along the Y axis direction) that is approximately the same as the thickness of the LED substrate 18. Therefore, the LED substrate 18 is sandwiched, on both of its edges located apart along the direction of its short side, by the main sections 31a and 32a, and the projections 31b and 32b in the thickness direction of the LED substrate 18 (Y axis direction). Thus, the LED substrate 18 is held between the main sections 31a and 32a, and the projections 31b and 32b. Surfaces 31b1 and 32b1 of the projections 31b and 32b, whose surfaces are opposite to the surfaces of the projections 31b and 32b that face the LED substrate 18, are located closer to the light receiving face 16b than the light-emitting surface 17a of the LED 17 is located to the light receiving face 16b.
The clamping member 30 can be divided into two: a front side member (an example of the frame side member) 31 and a back side member (an example of the chassis side member) 32. More precisely, the main sections 31a and 32a of the clamping member 30 can be separated from each other apart in the short side direction thereof (Z axis direction). Therefore, the front side member 31 and the back side member 32 have a similar shape. That is, the front side member 31 is constituted of a front side main section 31a, a front side extension section 31c that extends from the front side main section 31a toward the light exiting surface 16a of the light guide plate 16, and a front side projection 31b that extends from the front side extension section 31c toward the LED 17. Like the front side member 31, the back side member 32 is constituted of a back side main section 32a, a back side extension section 32c that extends from the back side main section 32a toward the reverse surface 16c of the light guide plate 16, and a back side projection 32b that extends from the back side extension section 32c toward the LED 17. A part of the back side main section 32a that faces the chassis 14, and a part of the back side extension section 32c that faces the chassis 14 are entirely in contact with the front face 14a of the chassis 14.
Here, with reference to
When engaging the front side member 31 with the back side member 32, by inserting the locking piece 32d of the back side member 32 straight into the locking hole 31d of the front side member 31 as indicated by the two-dot chain line of
Next, a configuration for supporting the clamping member 30 against the frame 13 and against the chassis 14 is described. As shown in
As shown in
Next, a manufacturing process of the liquid crystal display device 10 is described. In a manufacturing process of the liquid crystal display device 10 according to the present embodiment, the unified unit UU is assembled in advance. That is, between the front side member 31 and the back side member 32 of the clamping member 30, while they are still separate, the LED substrate 18 having LEDs 17 mounted thereon and the periphery of the light guide plate 16, the periphery being located beside the light receiving face 16b, are inserted. The front side member 31 and the back side member 32 are then assembled to complete a unified unit UU. Here, in the manufacturing process of the liquid crystal display device 10, the liquid crystal display device 10 is manufactured by assembling members in order from the front surface side of the liquid crystal display device 10 (from the top side in
As described above, the clamping member 30 sandwiches the light guide plate 16 in the thickness direction thereof (in the Z axis direction) to hold in place the light guide plate 16 and the LED substrate 18 with the LED 17 mounted thereon. Thus, the light guide plate 16, the LED substrate 18, and the clamping member 30 hold each other to be unified and to form a unified unit UU. Also, the clamping member 30 constituting the unified unit UU is supported by the frame 13 and is secured to the chassis 14, and thereby the unified unit UU is aligned between the frame 13 and the chassis 14. Therefore, in the liquid crystal display device 10 according to the present embodiment, a configuration that can align the light guide plate 16 without the need to provide recesses and protrusions for the light guide plate 16 aligned on the edge surface of the light guide plate 16 is realized.
As described above, in the manufacturing process of the liquid crystal display device 10 according to the present embodiment, the LED substrate 18 having LEDs 17 provided thereon is attached to the clamping member 30, and then the periphery of the light guide plate 16, the periphery being located beside the light receiving face 16b, is sandwiched by the clamping member 30. As a result, the clamping member 30 is attached to the light guide plate 16. The clamping member 30 sandwiching the light guide plate 16 is supported by the support ribs 13c of the frame 13. Thus, the light guide plate 16 can be aligned against the frame 13 in the plate surface direction thereof (in the X-Y plane direction). Therefore, without the need to provide recesses and protrusions on the edge surface of the light guide plate 16, the light guide plate 16 can be aligned in the plate surface thereof (X-Y plane direction) with an alignment member 30. Furthermore, because an upper member 31 of the clamping member 30 is configured to cover the front side of the LED 17 (the side facing the liquid crystal panel 11), the light emitted from the LED 17 toward the liquid crystal panel 11 is blocked by the upper member 31 of the clamping member 30. As a result, a configuration in which the light guide plate 16 can be aligned in the plate surface direction thereof (in the X-Y plane direction) is realized, yet light emitted from the LED 17 can be prevented from entering inside through the edge surface of the liquid crystal panel 11.
In the liquid crystal display device 10 according to the present embodiment, the clamping member 30 is divisible into two members, apart in the thickness direction of the light guide plate 16 (direction of Z axis), whose members constitute the clamping member 30 are: the front side member 31 disposed to face the frame 13, and the back side member 32 disposed to face the chassis 14. According to such a configuration, if, for example, an LED 17 stops emitting light after the LED substrate 18 is attached to the clamping member 30, because the clamping member 30 can be divided into two, the LED 17 can easily be replaced. Thus, this configuration can improve efficiency in work such as parts replacement. Furthermore, because the clamping member 30 is divisible into two, work efficiency when assembling a large liquid crystal display device can also be improved.
Also, a liquid crystal display device 10 according to the present embodiment is configured such that the back side member 32 of the clamping member 30 is attached to the chassis 14 with screws, and is thereby secured to the chassis 14. According to such a configuration, the clamping member 30 can be secured to the chassis 14 by tightening screws, and therefore it is possible to make errors difficult to occur in the alignment of the clamping member 30 against the chassis 14 as well as against the frame 13.
Also, the liquid crystal display device 10 according to the present embodiment includes a clamping member 30 that is made of a metal having at least the same thermal conductivity as the chassis 14, and that has a portion that covers the back side of the LEDs 17 (the side facing the chassis 14), where the portion that covers the side facing the chassis 14 abuts the chassis 14. According to such a configuration, heat generated near the LEDs 17 is dissipated effectively from the LED substrate 18 toward the chassis 14 through the clamping member 30 that is made of a metal, and therefore a good heat dissipation performance can be achieved.
Also, in the liquid crystal display device 10 according to the present embodiment, the clamping member 30 has projections 31b and 32b at locations exposed to the LEDs 17, which has projections protruding toward the LEDs 17. The clamping member 30 also has a surface that abuts a surface of the LED substrate 18, the surface of the LED substrate 18 being located opposite from the surface of the LED substrate 18 on which the LEDs 17 are mounted. The LED substrate 18 is supported by being sandwiched in the thickness direction thereof (Z axis direction) by the surface it abuts against and the projections 31b and 32b. According to such a configuration, by enclosing the LED substrate 18 between the surface it abuts against and the projections 31b and 32b, and by sliding the LED substrate 18 along the direction in which the abutting surface and the projections 31b and 32b extend, the LED substrate 18 can easily be held against the clamping member 30.
In a liquid crystal display device 10 according to the present embodiment, surfaces 31b1 and 32b1 of the projections 31b and 32b, which has surfaces that are opposite from the surfaces abutting against the LED substrate 18, are located closer to the light receiving face 16b than the light-emitting surface 17a of LED 17 is located to the light receiving face 16b.
According to such a configuration, if the light receiving face 16b of the light guide plate 16 moves toward LED 17 due to causes such as thermal expansion, the light receiving face 16b touches the projections 31b and 32b before it touches the LED 17. Consequently, light-emitting surface 17a of the LED 17 can be prevented from being damaged or the like by contact of the light receiving face 16b and the LED 17.
A liquid crystal display device 10 according to the present embodiment is a so-called cabinet-less type liquid crystal display device 110, which no longer includes a synthetic resin cabinet, which is an exterior part of the liquid crystal display unit. A liquid crystal display device 10, which is a cabinet-less type, is configured such that an optical member 15 and a liquid crystal panel 11 are layered on the light exiting surface 16a of the light guide plate 16. Therefore, if recesses and protrusions are provided on the edge surface of the light guide plate 16, light that passes through inside the light guide plate 16 leaks through the recesses and protrusions, and such light can enter inside through the edge surface of the liquid crystal panel 11. If there is any light entering inside through the edge surface of the liquid crystal panel 11, excessively bright areas (bright spots) can appear on the display surface 11c of the liquid crystal panel 11. By contrast, in the liquid crystal display device 10 according to the present embodiment, it is difficult for light to leak through the edge surface of the light guide plate 16, because recesses or protrusions are not provided on the edge surface of the light guide plate 16. Furthermore, because the front side of the LEDs 17 (the side facing the liquid crystal panel 11) is covered by the front side extension section 31c of the clamping member 30, light emitted from the LEDs 17 is prevented from directly proceeding toward the liquid crystal panel 11.
Next, Modification Example 1 of Embodiment 1 is described. A liquid crystal display device 10 according to Modification Example 1 is different from the one according to Embodiment 1 in that it includes a buffer member 34. Other aspects of the configuration are similar to Embodiment 1, and therefore descriptions of the structure, functions, and effects are omitted. As shown in
Next, Modification Example 1 of Embodiment 1 is described. A liquid crystal display device 10 according to Modification Example 2 is different from the one according to Embodiment 1 regarding the configuration of the clamping member 30 and the form of assembling the clamping member 30. Other aspects of the configuration are similar to Embodiment 1, and therefore descriptions of the structure, functions, and effects are omitted. As shown in
According to the configuration described above, the clamping member 30 can be divided into four pieces, apart in the up/down direction (Z axis direction) and apart in the left/right direction (X axis direction). Here, in the manufacturing process where the liquid crystal display device 10 is used for a super large (90″ type, for example) television receiver TV, if the clamping member 30 is not configured to be divisible into smaller pieces, the clamping member 30 becomes large, and may be difficult to handle during the assembly. In contrast, in the liquid crystal display device 10 according to this modification example, the clamping member 30 is divisible into four pieces. Therefore, in the manufacturing process for a television receiver TV, the clamping member 30 can be assembled efficiently.
Embodiment 2 is described with reference to figures. In Embodiment 2, the form of assembling a front side member 131 and a back side member 132 that constitute a clamping member 130, and the form of supporting a clamping member 130 against a frame 113 is different from those of Embodiment 1. Other aspects of the configuration are similar to Embodiment 1, and therefore descriptions of the structure, functions, and effects are omitted. In
As shown in
Also, in Embodiment 2, the leading edge surface of the support rib 113c provided on the frame 113 meets the surface of the front side member 131 of the clamping member 130 that faces the frame 113, in the direction of its height (Z axis direction). And, at the site on the front side member 131 of the clamping member 130 that faces the support rib 113c, a fitting protrusion 131a1 protruding toward the support rib 113c is provided (see
Next, a modification example of Embodiment 2 is described. A liquid crystal display device 110 according to the modification example has a spring member that connects the front side member 131 and the back side member 132, and that has a configuration different from the configuration of the spring member of Embodiment 2. Other aspects of the configuration are similar to Embodiment 2, and therefore descriptions of the structure, functions, and effects are omitted. As shown in
Embodiment 3 is described with reference to figures. In Embodiment 3, the configuration of the clamping member 230 and the form of assembling the clamping member 230 to the light guide plate 216 is different from Embodiment 1. Other aspects of the configuration are similar to Embodiment 1, and therefore descriptions of the structure, functions, and effects are omitted. In
As shown in
According to the configuration described above, when the clamping member 230 and the light guide plate 216 are assembled in a manufacturing process for a liquid crystal display device according to the present embodiment, the protrusion 230d of the clamping member 230 can engage the groove section 216s of the light guide plate 216, through the openings provided on both ends of the groove section 216s. In this state, by sliding the light guide plate 216 along the direction in which the protrusion 230d extends (X axis direction), or by sliding the clamping member 230 along the direction in which the groove section 216s extends (X axis direction), the clamping member 230 can easily be installed to the light guide plate 216 (see
Modification examples of embodiments described above are listed below.
(1) In the descriptions of embodiments above, embodiments where the clamping member is constituted of a main section, an extension section, and a projection (protrusion) are presented only as examples. The clamping member only needs to be able to align the light guide plate by sandwiching the periphery of the light guide plate, the periphery being located beside the light receiving face, and thereby to be supported against the frame. The configuration of the clamping member is, therefore, not limited.
(2) In the descriptions of embodiments above, embodiments where an LED substrate is held by being sandwiched between the main section and the projection of the clamping member are provided only as an example. The configuration for holding the LED substrate against the clamping member is not limited. For example, LED substrate may be held by being attached to the clamping member with screws.
(3) In the descriptions of embodiments above, the length of the extension section constituting the clamping member, the length being in the direction of short side of the extension section, is not limited. However, the length is preferably long enough to maintain the state in which the periphery of the light guide plate, the periphery being located beside the light receiving face, can be sandwiched between the extension sections even if the light guide plate shrinks due to causes such as cooling. According to such a configuration, even if the light guide plate shrinks due to cooling or other causes, the clamping member and the light guide plate can be made hard to be disengaged.
(4) In the descriptions of Embodiment 1 and Embodiment 3 above, configurations where the clamping member is supported against the frame by the engagement between the fitting recesses provided on the clamping member and the support ribs provided on the frame are presented only as an example. The configuration in which the clamping member is supported against the frame is not limited.
(5) In the descriptions of embodiments above, configurations in which the clamping member is supported against the chassis by being attached to the chassis with screws are presented only as an example. The configuration in which the clamping member is supported against the chassis is not limited.
(6) In the description of Embodiment 2 above, the configuration in which a locking piece is provided on one divided member constituting the clamping member, and a locking hole is provided on the other divided member is presented only as an example. The configuration for assembling the divided members and the form of assembling the divided members are not limited.
(7) Besides the embodiments described above, the configuration, shape, arrangement, and the like of the clamping member can be modified as appropriate.
(8) Besides Embodiment 2 described above, the form of dividing the clamping member can be modified as appropriate.
(9) In the descriptions of the embodiments above, a liquid crystal display device where a liquid crystal panel is used as the display panel is presented only as an example. The present invention can also be applied to display devices where other types of display panels are used.
Embodiments of the present invention are described in detail above. However, these are only examples and the scope of the present invention is not limited to them. Technologies presented in claims include various transformations and modifications of specific examples described above.
Additionally, technology components described in this specification and in appended figures provide technical utility independently or in combination with other components, and are not limited to combinations stated in claims at the time of application filing. Furthermore, with technologies described as examples in this specification and in appended figures, multiple objectives can simultaneously be achieved. Those technologies are deemed to have technical utility by achieving one of those objectives.
Number | Date | Country | Kind |
---|---|---|---|
2012-191313 | Aug 2012 | JP | national |
Filing Document | Filing Date | Country | Kind |
---|---|---|---|
PCT/JP2013/072519 | 8/23/2013 | WO | 00 |