Patent Application
20120257137
1. Field of the Invention
The present invention relates to a liquid crystal display, a liquid crystal module and a display, and more particularly, it relates to a liquid crystal display, a liquid crystal module and a display each including a light guide.
2. Description of the Background Art
A liquid crystal display including a light guide is known in general, as disclosed in Japanese Patent Laying-Open No. 2002-156632, for example.
The aforementioned Japanese Patent Laying-Open No. 2002-156632 discloses a liquid crystal display including a liquid crystal panel, a substrate mounted with an LED (light-emitting device), a light guide, including a photoreceiving surface receiving light emitted by the LED, for guiding the light received through the photoreceiving surface toward the liquid crystal panel and a mold frame provided separately from the light guide to surround the light guide. In this liquid crystal display, the mold frame is not fixed to the light guide, but formed to urge the light guide arranged therein in a direction with pawls. The substrate mounted with the LED is mounted on an inner surface of the mold frame along the direction.
In the liquid crystal display disclosed in the aforementioned Japanese Patent Laying-Open No. 2002-156632, however, not only the light guide but also the mold frame of resin provided separately from the light guide is deformed when the ambient temperature or humidity changes or stress is externally applied to the liquid crystal display, and hence the positional relation between the LED provided on the side of the mold frame and the light guide remarkably changes. Consequently, the light emitted by the LED may conceivably be improperly introduced into the photoreceiving surface of the light guide. In this case, brightness of the light guided toward the liquid crystal panel is disadvantageously reduced and irregularized.
The present invention has been proposed in order to solve the aforementioned problem, and an object of the present invention is to provide a liquid crystal display, a liquid crystal module and a display each capable of suppressing reduction and irregularization of brightness of light guided to a liquid crystal panel or a display panel.
A liquid crystal display according to a first aspect of the present invention includes a liquid crystal panel, a substrate including a mounting surface mounted with a light-emitting device and a light guide including a photoreceiving surface arranged to be opposed to the mounting surface for receiving light emitted by the light-emitting device, a light guide body portion guiding the light received through the photoreceiving surface toward the liquid crystal panel and a mounting portion mounted with the substrate so that the mounting surface is opposed to the photoreceiving surface.
In the liquid crystal display according to the first aspect of the present invention, as hereinabove described, the substrate having the mounting surface mounted with the light-emitting device is mounted on the mounting portion provided on the light guide so that the substrate mounted on the mounting portion of the light guide is deformed following deformation of the light guide when the ambient temperature or humidity changes or stress is externally applied to the liquid crystal display to deform the light guide, whereby the relative positions of (positional relation between) the light-emitting device mounted on the mounting surface of the substrate and the photoreceiving surface of the light guide can be inhibited from changing. Thus, the light emitted by the light-emitting device can be inhibited from being improperly introduced into the photoreceiving surface of the light guide, whereby brightness of the light guided toward the liquid crystal panel can be inhibited from reduction and irregularization. Further, the substrate is so arranged that the mounting surface thereof and the photoreceiving surface of the light guide are opposed to each other, whereby the light-emitting device mounted on the mounting surface of the substrate and the photoreceiving surface of the light guide can be easily opposed to each other.
In the aforementioned liquid crystal display according to the first aspect, the mounting surface of the substrate or a surface of the substrate on the back side of the mounting surface is preferably bonded to the mounting portion so that the mounting surface is opposed to the photoreceiving surface. According to this structure, the mounting surface of the substrate and the photoreceiving surface of the light guide can be easily opposed to each other. Further, the mounting surface or the surface on the back side of the mounting surface is so bonded to the mounting portion of the light guide that the light guide and the substrate can be approximated to each other, whereby the quantity of relative displacement of the light guide and the substrate can be reduced. Thus, the relative positions of the light-emitting device and the photoreceiving surface can be more effectively inhibited from changing.
In the aforementioned liquid crystal display according to the first aspect, the light-emitting device is preferably arranged to be surrounded by the light guide. According to this structure, the substrate mounted with the light-emitting device can be easily approximated to the light guide, whereby the relative positions of the light-emitting device and the photoreceiving surface can be easily inhibited from changing. Further, the light guide surrounds the light-emitting device, whereby the light emitted by the light-emitting device can be efficiently introduced into the light guide.
In the aforementioned liquid crystal display according to the first aspect, the light guide preferably further includes a through-hole or a recess portion provided in the vicinity of an end surface of the light guide to extend in a direction along the end surface of the light guide, and the substrate is preferably bonded to the mounting portion provided on the through-hole or the recess portion. According to this structure, the substrate can be arranged inside the light guide, whereby the substrate can more easily follow deformation of the light guide.
In this case, the through-hole or the recess portion of the light guide is preferably provided with a first inner side surface serving as the photoreceiving surface and a second inner side surface serving as the mounting portion arranged to be opposed to the first inner side surface, and the substrate is preferably bonded to the second inner side surface serving as the mounting portion provided on the through-hole or the recess portion of the light guide. According to this structure, the mounting surface (light-emitting device) of the substrate and the photoreceiving surface of the light guide can be easily opposed to each other through the inner side surfaces of the through-hole or the recess portion provided on the light guide.
In the aforementioned liquid crystal display having the light guide including the through-hole or the recess portion, the through-hole or the recess portion is preferably formed to pass through the light guide or to be recessed in the thickness direction of the light guide. According to this structure, the substrate can be arranged inside the through-hole or the recess portion of the light guide, whereby the substrate can be easily arranged inside the light guide.
In the aforementioned liquid crystal display having the light guide including the through-hole or the recess portion provided with the first inner side surface and the second inner side surface, the substrate is preferably bonded to the second inner side surface serving as the mounting portion so that the light-emitting device and the first inner side surface serving as the photoreceiving surface are arranged to be separated from each other at a prescribed interval. According to this structure, the light-emitting device and the first inner side surface are so separated from each other that the light-emitting device can be inhibited from coming into contact with the first inner side surface upon deformation of the light guide.
In the aforementioned liquid crystal display according to the first aspect, the mounting portion is preferably provided to protrude from the light guide body portion toward the substrate, and the substrate is preferably bonded to the mounting portion protruding toward the substrate. According to this structure, the substrate can be easily bonded to the light guide through the mounting portion protruding toward the substrate while avoiding the light-emitting device mounted on the mounting surface.
In this case, a plurality of light-emitting devices are preferably provided on the mounting surface of the substrate at a prescribed interval, and the mounting surface of the substrate is preferably bonded to the mounting portion on a plurality of positions between the light-emitting devices. According to this structure, the substrate can be bonded to the mounting portion on the plurality of positions of the mounting surface, whereby the substrate can be more firmly mounted on the light guide. Thus, the relative positions of the light-emitting device and the photoreceiving surface can be more reliably inhibited from changing.
In the aforementioned liquid crystal display having the plurality of light-emitting devices provided on the mounting surface of the substrate at the prescribed interval, a projecting portion serving as the mounting portion and a recessed relief portion for receiving the light-emitting devices thereon are preferably integrally formed on a portion of the light guide opposed to the substrate. According to this structure, the mounting portion for the substrate and the relief portion for the light-emitting devices can be easily formed.
In the aforementioned liquid crystal display having the plurality of light-emitting devices provided on the mounting surface of the substrate at the prescribed interval, the mounting portion of the light guide protruding toward the substrate is preferably formed to have a width smaller than the prescribed interval between adjacent light-emitting devices. According to this structure, the mounting surface of the substrate and the mounting portion can be easily bonded to each other between the light-emitting devices.
In the aforementioned liquid crystal display according to the first aspect, the substrate is preferably formed to be deflectable in response to deformation of the mounting portion of the light guide. According to this structure, the substrate can easily follow deformation of the light guide through deflection upon the deformation of the light guide, whereby the relative positions of the light-emitting device and the photoreceiving surface can be more easily inhibited from changing.
In the aforementioned liquid crystal display according to the first aspect, the substrate is preferably bonded to the mounting portion through a heat radiation tape having adhesiveness. According to this structure, heat generated by the light-emitting device can be radiated through the heat radiation tape.
The aforementioned liquid crystal display according to the first aspect preferably further includes a rear chassis arranged to cover the back surface of the light guide, and the rear chassis is preferably formed not to be in contact with the substrate. According to this structure, the relative positions of the light-emitting device and the photoreceiving surface can be inhibited from changing due to contact between the rear chassis and the substrate.
In the aforementioned liquid crystal display according to the first aspect, the light-emitting device preferably includes a light-emitting diode. According to this structure, brightness of light guided from the light-emitting diode toward the liquid crystal panel can be inhibited from reduction and irregularization.
A liquid crystal module according to a second aspect of the present invention includes a liquid crystal panel, a substrate including a mounting surface mounted with a light-emitting device and a light guide including a photoreceiving surface arranged to be opposed to the mounting surface for receiving light emitted by the light-emitting device, a light guide body portion guiding the light received through the photoreceiving surface toward the liquid crystal panel and a mounting portion mounted with the substrate so that the mounting surface is opposed to the photoreceiving surface, and is formed to be arranged inside a housing.
In the liquid crystal module according to the second aspect of the present invention, as hereinabove described, the substrate having the mounting surface mounted with the light-emitting device is mounted on the mounting portion provided on the light guide so that the substrate mounted on the mounting portion of the light guide is deformed following deformation of the light guide when the ambient temperature or humidity changes or stress is externally applied to the liquid crystal module to deform the light guide, whereby the relative positions of (positional relation between) the light-emitting device mounted on the mounting surface of the substrate and the photoreceiving surface of the light guide can be inhibited from changing. Thus, the light emitted by the light-emitting device can be inhibited from being improperly introduced into the photoreceiving surface of the light guide, whereby brightness of the light guided toward the liquid crystal panel can be inhibited from reduction and irregularization. Further, the substrate is so arranged that the mounting surface thereof and the photoreceiving surface of the light guide are opposed to each other, whereby the light-emitting device mounted on the mounting surface of the substrate and the photoreceiving surface of the light guide can be easily opposed to each other.
In the aforementioned liquid crystal module according to the second aspect, the mounting surface of the substrate or a surface of the substrate on the back side of the mounting surface is preferably bonded to the mounting portion so that the mounting surface is opposed to the photoreceiving surface. According to this structure, the mounting surface of the substrate and the photoreceiving surface of the light guide can be easily opposed to each other. Further, the mounting surface or the surface on the back side of the mounting surface is so bonded to the mounting portion of the light guide that the light guide and the substrate can be approximated to each other, whereby the quantity of relative displacement of the light guide and the substrate can be reduced. Thus, the relative positions of the light-emitting device and the photoreceiving surface can be more effectively inhibited from changing.
In the aforementioned liquid crystal module according to the second aspect, the light-emitting device is preferably arranged to be surrounded by the light guide. According to this structure, the substrate mounted with the light-emitting device can be easily approximated to the light guide, whereby the relative positions of the light-emitting device and the photoreceiving surface can be easily inhibited from changing. Further, the light guide surrounds the light-emitting device, whereby the light emitted by the light-emitting device can be efficiently introduced into the light guide.
In the aforementioned liquid crystal module according to the second aspect, the light guide preferably further includes a through-hole or a recess portion provided in the vicinity of an end surface of the light guide to extend in a direction along the end surface of the light guide, and the substrate is preferably bonded to the mounting portion provided on the through-hole or the recess portion. According to this structure, the substrate can be arranged inside the light guide, whereby the substrate can more easily follow deformation of the light guide.
A display according to a third aspect of the present invention includes a display panel, a substrate including a mounting surface mounted with a light-emitting device and a light guide including a photoreceiving surface arranged to be opposed to the mounting surface for receiving light emitted by the light-emitting device, a light guide body portion guiding the light received through the photoreceiving surface toward the display panel and a mounting portion mounted with the substrate so that the mounting surface is opposed to the photoreceiving surface.
In the display according to the third aspect of the present invention, as hereinabove described, the substrate having the mounting surface mounted with the light-emitting device is mounted on the mounting portion provided on the light guide so that the substrate mounted on the mounting portion of the light guide is deformed following deformation of the light guide when the ambient temperature or humidity changes or stress is externally applied to the display to deform the light guide, whereby the relative positions of (positional relation between) the light-emitting device mounted on the mounting surface of the substrate and the photoreceiving surface of the light guide can be inhibited from changing. Thus, the light emitted by the light-emitting device can be inhibited from being improperly introduced into the photoreceiving surface of the light guide, whereby brightness of the light guided toward the display panel can be inhibited from reduction and irregularization. Further, the substrate is so arranged that the mounting surface thereof and the photoreceiving surface of the light guide are opposed to each other, whereby the light-emitting device mounted on the mounting surface of the substrate and the photoreceiving surface of the light guide can be easily opposed to each other.
The foregoing and other objects, features, aspects and advantages of the present invention will become more apparent from the following detailed description of the present invention when taken in conjunction with the accompanying drawings.
Embodiments of the present invention are now described with reference to the drawings.
First, the structure of a liquid crystal display 100 according to a first embodiment of the present invention is described with reference to
The liquid crystal display 100 according to the first embodiment of the present invention includes a display body 1 and a stand 2 supporting the display body 1 to be rotatable in the horizontal direction (direction X) and the anteroposterior direction (direction Y), as shown in
The front cabinet 11 is arranged on the front side (along arrow Y1) of the display body 1, as shown in
The rear cabinet 12 is arranged on the rear side (along arrow Y2) of the display body 1, as shown in
The liquid crystal panel 13 is arranged between the front cabinet 11 and the mold frame 14 and supported by the front cabinet 11 and the mold frame 14, as shown in
The mold frame 14 consists of a resin member, and is arranged between the front cabinet 11 and the backlight 20, as shown in
The backlight 20 is formed to emit light toward the rear surface (along arrow Y2) of the liquid crystal panel 13. Thus, the liquid crystal panel 13 can display bright and clear images. The backlight 20 is an edge-lit type member receiving light from a light source from an edge of a light guide. The backlight 20 includes a plurality of light-emitting diodes 21, a substrate 22, a light guide 23, a rear chassis 24, a reflection sheet 25, a diffusion sheet 26 and a plurality of lens sheets 27, as shown in
The plurality of light-emitting diodes 21 are mounted on a mounting surface 22a of the substrate 22 at a substantially regular interval D1 along the direction X, as shown in
The substrate 22 has the mounting surface 22a mounted with the light-emitting diodes 21 on the upper side (along arrow Z2) and a back surface 22b arranged on the back side (along arrow Z1) of the mounting surface 22a, as shown in
The light guide 23 is made of transparent acrylic resin having translucency, and provided in the form of a flat plate having a thickness t1 (in the direction Y), as shown in
According to the first embodiment, the through-hole 23b is formed to pass through the light guide 23 in the thickness direction (direction Y) thereof. The through-hole 23b is in the form of a rectangle extending in the direction X, and provided in the vicinity of a lower end surface (along arrow Z1) of the light guide 23. The through-hole 23b is provided with the upper inner surface 23c and the lower inner side surface 23d on the upper and lower sides (along arrows Z2 and Z1) thereof respectively. The upper inner side surface 23c of the through-hole 23b is arranged to be opposed to the light-emitting diodes 21, and formed to receive the light emitted by the light-emitting diodes 21. The substrate 22 mounted with the light-emitting diodes 21 is bonded to the lower inner side surface 23d of the through-hole 23b through the heat radiation tape 22c. The upper and lower inner side surfaces 23c and 23d are arranged to be substantially parallelly opposed to each other. Further, the upper and lower inner side surfaces 23c and 23d are arranged inside the through-hole 23b at an interval H2 larger than the height H1. In other words, the light-emitting diodes 21 and the upper inner side surface 23c are separated from each other at a prescribed interval. Thus, the liquid crystal display 100 is so formed that the light-emitting diodes 21 do not come into contact with the upper inner side surface 23c of the through-hole 23b. The upper inner side surface 23c is an example of the “photoreceiving surface” or the “first inner side surface” in the present invention, and the lower inner side surface 23d is an example of the “mounting portion” or the “second inner side surface” in the present invention.
The light guide 23 is arranged to fit into the rear chassis 24 through the reflection sheet 25 (see
The rear chassis 24 consists of a metal member, and has the bottom portion 24a and a wall portion 24b, as shown in
The reflection sheet 25 is arranged between the light guide 23 and the bottom portion 24a of the rear chassis 24, and formed to reflect light received from the light guide 23 frontward (along arrow Y1). The diffusion sheet 26 is stacked on the front side (along arrow Y1) of the light guide 23. The plurality of lens sheets 27 are stacked on the front side (along arrow Y1) of the diffusion sheet 26. The light emitted from the light guide 23 is transmitted through the diffusion sheet 26 and the plurality of lens sheets 27, and thereafter reaches the rear side (along arrow Y2) of the liquid crystal panel 13. At this time, the light is adjusted to a state of backlight exhibiting no irregularity and having desired brightness.
According to the first embodiment, as hereinabove described, the substrate 22 having the mounting surface 22a mounted with the light-emitting diodes 21 is so mounted on the lower inner side surface 23d of the through-hole 23b provided in the light guide 23 that the substrate 22 mounted on the lower inner side surface 23d of the light guide 23 is deformed following deformation of the light guide 23 when the ambient temperature or humidity changes or stress is externally applied to the liquid crystal display 100 to deform the light guide 23, whereby the relative positions of the light-emitting diodes 21 mounted on the mounting surface 22a of the substrate 22 and the upper inner side surface 23c of the light guide 23 receiving the light can be inhibited from changing. Thus, the light emitted by the light-emitting diodes 21 can be inhibited from being improperly introduced into the upper inner side surface 23c of the light guide 23, whereby brightness of the light guided toward the liquid crystal panel 13 can be inhibited from reduction and irregularization. Further, the substrate 22 is so arranged that the mounting surface 22a thereof is opposed to the upper inner side surface 23c, whereby the light-emitting diodes 21 mounted on the mounting surface 22a and the upper inner side surface 23c of the light guide 23 receiving the light can be easily opposed to each other.
According to the first embodiment, the back surface 22b of the substrate 22 is so bonded to the lower inner side surface 23d that the mounting surface 22a is opposed to the upper inner side surface 23c, whereby the mounting surface 22a of the substrate 22 and the upper inner side surface 23c of the light guide 23 can be easily opposed to each other. Further, the back surface 22b of the substrate 22 is so bonded to the lower inner side surface 23d of the light guide 23 that the light guide 23 and the substrate 22 can be approximated to each other, whereby the quantity of relative displacement of the light guide 23 and the substrate 22 can be reduced. Thus, the relative positions of the light-emitting diodes 21 and the upper inner side surface 23c receiving the light can be more effectively inhibited from changing.
According to the first embodiment, the light-emitting diodes 21 are arranged to be surrounded by the light guide 23 so that the substrate 22 mounted with the light-emitting diodes 21 can be easily approximated to the light guide 23, whereby the relative positions of the light-emitting diodes 21 and the upper inner side surface 23c receiving the light can be easily inhibited from changing. Further, the light guide 23 surrounds the light-emitting diodes 21, whereby the light emitted by the light-emitting diodes 21 can be efficiently introduced into the light guide 23.
According to the first embodiment, the through-hole 23b extending in the direction along the end surface of the light guide 23 is provided in the vicinity of the end surface of the light guide 23 and the substrate 22 is bonded to the lower inner side surface 23d provided on the through-hole 23b so that the substrate 22 can be arranged inside the light guide 23, whereby the substrate 22 can more easily follow deformation of the light guide 23.
According to the first embodiment, the through-hole 23b of the light guide 23 is provided with the upper inner side surface 23c receiving the light and the lower inner side surface 23d arranged to be opposed to the upper inner side surface 23c and the substrate 22 is bonded to the lower inner side surface 23d provided on the through-hole 23b of the light guide 23, whereby the mounting surface 22a (light-emitting diodes 21) of the substrate 22 and the upper inner side surface 23c of the light guide 23 can be easily opposed to each other through the inner side surfaces 23c and 23d of the through-hole 23b provided in the light guide 23.
According to the first embodiment, the through-hole 23b is formed to pass through the light guide 23 in the thickness direction (direction Y) thereof so that the substrate 22 can be arranged inside the through-hole 23b of the light guide 23, whereby the substrate 22 can be easily arranged inside the light guide 23.
According to the first embodiment, the substrate 22 is so bonded to the lower inner side surface 23d that the light-emitting diodes 21 and the upper inner side surface 23c are separated from each other at the prescribed interval, whereby the light-emitting diodes 21 separated from the upper inner side surface 23 can be inhibited from coming into contact with the upper inner side surface 23c upon deformation of the light guide 23.
According to the first embodiment, the substrate 22 is formed to be deflectable following deformation of the light guide 23 so that the substrate 22 can be easily deflected to follow deformation of the light guide 23 upon the deformation of the light guide 23, whereby the relative positions of the light-emitting diodes 21 and the upper inner side surface 23c receiving the light can be more easily inhibited from changing.
According to the first embodiment, the substrate 22 is bonded to the lower inner side surface 23d through the heat radiation tape 22c having adhesiveness, whereby heat generated by the light-emitting diodes 21 can be radiated through the heat radiation tape 22c.
According to the first embodiment, the rear chassis 24 is formed not to come into contact with the substrate 22, whereby the relative positions of the light-emitting diodes 21 and the upper inner side surface 23c can be inhibited from changing due to contact between the rear chassis 24 and the substrate 22.
The structure of a liquid crystal display 200 (see
The liquid crystal display 200 according to the second embodiment of the present invention includes a display body 1 and a stand 2 supporting the display body 1 to be rotatable in the horizontal direction (direction X) and the anteroposterior direction (direction Y), as shown in
The backlight 30 is formed to emit light toward the rear surface (along arrow Y2) of the liquid crystal panel 13. Thus, the liquid crystal panel 13 can display bright and clear images. The backlight 30 is an edge-lit type member receiving light from a light source from an edge of a light guide. The backlight 30 is combined with the liquid crystal panel 13, to constitute a liquid crystal module. The backlight 30 includes a plurality of light-emitting diodes 21, the substrate 22, the light guide 33, a rear chassis 24, a reflection sheet 25, a diffusion sheet 26 and a plurality of lens sheets 27, as shown in
The substrate 22 has the mounting surface 22a mounted with the light-emitting diodes 21 thereon (along arrow Z2) and a back surface 22b arranged on the back side (along arrow Z1) of the mounting surface 22a, as shown in
The light guide 33 is made of transparent acrylic resin having translucency, and provided in the form of a flat plate having a thickness t1 (in the direction Y), as shown in
According to the second embodiment, the plurality of protrusions 33b are provided at a prescribed interval, to protrude downward (along arrow Z1) from the light guide body portion 33a. In other words, a portion of the light guide 33 opposed to the substrate 22 is integrally provided with projecting portions (protrusions 33b) mounted with the substrate 22 and recess portions serving as relief portions where the light-emitting diodes 21 are arranged. The substrate 22 is bonded to the lower sides (along arrow Z1) of the plurality of protrusions 33b through the heat radiation tape 22c. The protrusions 33b have a height H4 (length in the direction Z) larger than the height H3. Thus, the liquid crystal display 200 is so formed that the light-emitting diodes 21 do not come into contact with the photoreceiving surface 33c. The protrusions 33b are formed to have a width (length in the direction X) smaller than the interval D1 between adjacent light-emitting diodes 21. The light guide 33 is arranged to fit into the rear chassis 24 through the reflection sheet 25 (see
The remaining structure of the second embodiment is similar to that of the aforementioned first embodiment. Also in the structure according to the second embodiment, as hereinabove described, the substrate 22 having the mounting surface 22a mounted with the light-emitting diodes 21 is mounted on the protrusions 33b provided on the light guide 33 similarly to the aforementioned first embodiment, whereby brightness of the light guided toward the liquid crystal panel 13 can be inhibited from reduction and irregularization when the ambient temperature or humidity changes or stress is externally applied to the liquid crystal display 200 to deform the light guide 33.
According to the second embodiment, as hereinabove described, the protrusions 33b are provided to protrude from the light guide body portion 33a toward the substrate 22 (along arrow Z1) and the substrate 22 is bonded to the protrusions 33b protruding toward the substrate 22 (along arrow Z1), whereby the substrate 22 can be easily bonded to the light guide 33 through the protrusions 33b protruding toward the substrate 22 while avoiding the light-emitting diodes 21 mounted on the mounting surface 22a.
According to the second embodiment, the plurality of light-emitting diodes 21 are provided on the mounting surface 22a of the substrate 22 at the prescribed interval while the mounting surface 22a of the substrate 22 is bonded to the protrusions 33b on the plurality of positions between the light-emitting diodes 21 so that the substrate 22 can be bonded to the protrusions 33b on the plurality of positions of the mounting surface 22a, whereby the substrate 22 can be more firmly mounted on the light guide 33. Thus, the relative positions of the light-emitting diodes 21 and the photoreceiving surface 33c can be more reliably inhibited from changing.
According to the second embodiment, the portion of the light guide 33 opposed to the substrate 22 is integrally provided with the projecting portions (protrusions 33b) mounted with the substrate 22 and the recess portions serving as the relief portions where the light-emitting diodes 21 are arranged, whereby the protrusions 33b for the substrate 22 and the relief portions for the light-emitting diodes 21 can be easily formed.
According to the second embodiment, the protrusions 33b of the light guide 33 protruding toward the substrate 22 are formed to have the width (length in the direction X) smaller than the interval D1 between the adjacent light-emitting diodes 21, whereby the mounting surface 22a of the substrate 22 and the protrusions 33b can be easily bonded to each other between the light-emitting diodes 21.
The remaining effects of the second embodiment are similar to those of the aforementioned first embodiment.
Although the present invention has been described and illustrated in detail, it is clearly understood that the same is by way of illustration and example only and is not to be taken by way of limitation, the spirit and scope of the present invention being limited only by the terms of the appended claims.
For example, while the liquid crystal display according to the present invention is applied to the liquid crystal television set having a TV tuner function or the liquid crystal monitor or the like connected to the PC or the like in each of the aforementioned first and second embodiments, the present invention is not restricted to this. The liquid crystal display according to the present invention may alternatively be applied to a liquid crystal monitor loaded on a car navigation system or an information display monitor (liquid crystal monitor) loaded in a train, a bus, a ship, an airplane or the like, for example. Further alternatively, the present invention may be applied to a display other than the liquid crystal display.
While the light guide is provided with the through-hole extending in the direction along the end surface of the light guide and the through-hole of the light guide is provided with the mounting portion to which the substrate is bonded and the photoreceiving surface receiving the light in the aforementioned first embodiment, the present invention is not restricted to this. Alternatively, a recess portion 43b may be provided on a light guide to be recessed in the thickness direction (direction Y) thereof, and a mounting portion 43b to which a substrate is bonded and a photoreceiving surface 43c receiving light may be provided on the recess portion 34b of the light guide, as in a modification of the first embodiment shown in
While the substrate is bonded to the mounting portion on all positions of the mounting surface between the light-emitting devices in the aforementioned second embodiment, the present invention is not restricted to this. According to the present invention, the substrate may not be bonded to the mounting portion on all positions of the mounting surface between the light-emitting devices. For example, the substrate may be bonded to the mounting portion on random positions of the mounting surface between the light-emitting devices.
| Number | Date | Country | Kind |
|---|---|---|---|
| 2011-87044 | Apr 2011 | JP | national |
