KR100782958B1 - Display unit, light guide plate and information apparatus - Google Patents

Abstract

The present invention relates to a display unit using a display panel, and provides a reinforcing structure for reinforcing the light guide plate without impairing the degree of freedom of the space on the rear side of the light guide plate. A display unit 40 having a light guide plate 44 for guiding the light 50 of the light source 48 for the display of the display panel 42, wherein the light guide plate has a side portion 60 in the cross direction with the incident direction of light. It is the structure provided with the reinforcement member (reinforcement beam 64) extended between 62.

Display panel, light guide plate, display unit, reinforcing member

Description

DISPLAY UNIT, LIGHT GUIDE PLATE AND INFORMATION APPARATUS}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reinforcing structure of a light guide plate used for a liquid crystal display (LCD) panel and the like, and relates to a display unit, a light guide plate, and an information device which prevents deformation due to a change in temperature and humidity of a use environment.

The display unit using the LCD panel or the like has a structure as shown in FIG. 1, for example. The display unit 2 is provided with a light guide plate 8 via a plurality of films 6 on the back side (non-display surface side) of the display panel 4, and at the side of the light guide plate 8. (10) is installed. The light source 10 is surrounded by the reflector 12 and the radiation direction of the light 14 is regulated. This light 14 is irradiated to the back side of the display panel 4 via the light guide plate 8. The light guide plate 8 has a reflecting surface 18 made of an inclined surface by setting the light incident portion 16 side thick and the opposite side portion thin so that the light 14 from the light source 10 can be It is a light guide member which guides to a back side efficiently and uniformly. The display unit 2 is provided with a control board 20, a driver IC 22, and the like used for display control.

Such a display unit 2 is used in various display devices, such as being incorporated in a display portion of a laptop computer and used for information display, and is required to be thin and light. By this request, the light guide plate 8 is thinned, for example, an acrylic plate is used. When the light guide plate 8 is thinly formed, the rigidity of the light guide plate 8 is reduced, and deformations such as expansion and curvature are likely to occur due to changes in environmental temperature and humidity. When the deformed light guide plate 8 comes into contact with the glass cell side of the display panel 4, it affects the liquid crystal display and the appearance of the display unit 2. For example, as shown by the broken line a in FIG. 1, the light guide plate 8 is bent toward the display panel 4 side to contact the cells of the display panel 4, so that the stress due to the deformation is caused from the light guide plate 8 to the display panel 4. ), If a change or the like occurs in the liquid crystal layer gap of the display panel 4, the display may be affected and the display quality may be lowered. For this reason, the light guide plate 8 is designed and manufactured so that it may bend in the back surface direction, as shown by the broken line b of FIG. This deformation to the back side causes a change in appearance of the display unit 2.

Regarding the prevention of deformation of such a display unit, there exist, for example, Japanese Patent Laid-Open No. Hei 4-56822 and Japanese Patent Laid-Open No. Hei 10-10325.

In the liquid crystal display device disclosed in Japanese Patent Laid-Open No. 4-56822, for example, as shown in FIG. 2, a main frame 24 surrounding the periphery of the light guide plate 8 is provided, and the upper edge of the frame 24 is provided. A plurality of reinforcement frames 26 and 28 are provided between the portion and the lower edge portion, and the deformation of the light guide plate 8 is prevented by reinforcing the frame 24 with the reinforcement frames 26 and 28. As shown in Fig. 3, each of the reinforcing frames 26 and 28 is fixed to the frame 24 by screws or the like, and thus has a relatively wide strip shape, thereby making the frame structure strong, while the thickness direction of the frame 24 is increased. Since the thickness t formed of the light guide plate 8 and the reinforcing frame 26 (or 28) increases, the thickness and weight of the display unit 2 are hindered. Moreover, in the display unit 2 which does not use the frame 24, the reinforcement frames 26 and 28 which reinforce the frame 24 cannot be provided.

In the reinforcing structure in which the wide reinforcing frames 26 and 28 in a band shape are brought into close contact with the rear part of the light guide plate 8, as shown in FIG. 4, the rear part of the light guide plate 8 is provided with a reinforcing frame 26. , 28, and the ratio increases, the degree of reinforcement of the frame 24 is improved, but the arrangement of the control board 20 and the driver IC 22 on the back side of the light guide plate 8 is limited, or (20) and the like to the design freedom. As shown by the broken line in FIG. 4, the driver IC 22 cannot be provided in the part covered by the reinforcement frames 26 and 28. FIG.

In addition, referring to the backlight device disclosed in Japanese Patent Application Laid-Open No. 10-10325, for example, as shown in FIG. 5, the reinforcing plate 30 is embedded in the light guide plate 8 so that Increasing the rigidity. In this case, the reinforcing plate 30 is disposed in a direction perpendicular to the cold cathode tube 32 serving as a light source. The reinforcing plate 30 embedded in the light guide plate 8 is applied to the propagation of light 14 in the light guide plate 8. This results in an unevenness 34 such as speckles or shadows in the diffusion of light 14. This affects the liquid crystal display and causes the display quality to deteriorate. This is because the reinforcing plate 30 in the light guide plate 8 blocks the light 14, thereby preventing the light 14 from diffusing.

Even if the reinforcing plate 30 is provided in this way to increase the rigidity of the light guide plate 8, the reinforcing plate 30 is inferior in practicality if the reinforcing plate 30 causes the display quality to deteriorate.

In this way, as a countermeasure against deformation of the light guide plate 8, the reinforcement frames 26 and 28 are provided to prevent the deformation of the light guide plate 8 indirectly, or the reinforcement plate 30 is incorporated in the light guide plate 8 directly. Although a technique for reinforcing the rigidity of the light guide plate 8 and preventing deformation has been disclosed, the task of reducing the thickness and weight of the display unit 2 and providing the control board 20 and the driver IC 22 on the back side is disclosed. While securing a degree of freedom, there is no disclosure of a problem to prevent deformation of the light guide plate 8, and this problem can be solved by the techniques disclosed in Japanese Patent Application Laid-open No. Hei 4-56822 and Japanese Patent Application Laid-open No. Hei 10-10325. none.

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a display unit using a display panel, and an object of the present invention is to provide a display unit that solves the above-described problems of the prior art.

The present invention relates in detail to a display unit using a display panel, and aims at preventing deformation of the light guide plate without impairing the degree of freedom of the space on the rear side of the light guide plate.

In order to achieve the above object, the display unit of the present invention is a display unit having a light guide plate for guiding light of a light source for display of a display panel, wherein the light guide plate is disposed between side surfaces of the light incidence direction and the cross direction. It is the structure containing a reinforcement member.

In order to achieve the above object, the light guide plate of the present invention is a light guide plate for guiding light of a light source for display of a display panel, and includes a reinforcing member disposed on a rear side of the light guide plate between a side portion of the light in the cross direction and the cross direction. to be.

In order to achieve the above object, the information device of the present invention includes a processing unit for performing information processing, a display panel for displaying the information processing, and a light guide plate for guiding light of a light source for displaying the display panel. An information device comprising: a reinforcing member that extends the light guide plate between side surfaces of the light incidence direction and the cross direction.

As described above, when the reinforcing member is provided between the side parts of the display unit, the light guide plate, or the information device, and the gripping plate is held between the side parts of the light guide plate, the light guide plate is mechanically interposed between the side parts by the addition of the reinforcing member and its reinforcement. In this case, the change due to the change in temperature and humidity of the use environment is prevented, and the resistance to the environment is increased.

In this case, since the reinforcing member is provided with respect to the light guide plate in the direction intersecting with the incident direction of light, the reinforcing member does not disturb the installation of the light source and does not interfere with the light diffusion in the light guide plate.

In order to achieve the above object, the light source is provided on the side portion of the display unit, the light guide plate is formed by making the light incident surface portion thick and thin side surface portion opposite the light incident surface portion, reflecting the light from the back portion of the light guide plate It may be configured to lead to the back portion of the display panel. That is, the installation of the reinforcing member does not interfere with this configuration.

In order to achieve the above object, the reinforcing member may be provided on the rear side of the light guide plate, and the thickness of the light guide plate and the reinforcing member may not exceed the thickness of the light incident surface portion of the light guide plate. With such a configuration, since the reinforcing member is provided within the thickness range of the light incident surface portion of the light guide plate, the thickness of the display unit and the appearance of the appearance are not impaired.

In order to achieve the above object, a control device may be provided in the rear portion of the light guide plate, and the thickness of the light guide plate and the control device may not exceed the thickness of the light incident surface part of the light guide plate. With such a configuration, since the control device is provided within the thickness range of the light incident surface portion of the light guide plate, the thickness of the display unit and the appearance of the external appearance are not impaired.

In order to achieve the above object, the reinforcing member may be configured to be fixed to the side surface portion of the light guide plate. With such a configuration, the light guide plate is reinforced by a reinforcing member fixed between the side portions of the light guide plate.

In order to achieve the above object, the reinforcing member may be configured as a plurality of beams, or may be configured to combine the respective beams at an intermediate portion. With such a configuration, the reinforcing member is formed by using the beam, the light guide plate can be strengthened in a compact structure, and the reinforcing strength is increased.

In order to achieve the above object, the reflective member may be sandwiched between the reinforcing member and the light guide plate. With such a configuration, the reflection member and the light guide plate can be brought into close contact with each other by providing the reinforcing member without any influence on the optical system.

In order to achieve the above object, the chassis includes a chassis provided at a periphery of the light guide plate, a rib formed at a side surface portion of the light guide plate, and a recess formed in the chassis corresponding to the rib, thereby fixing the rib fixed to the reinforcing member. It is good also as a structure inserted in the said recessed part of a chassis. With such a configuration, the positioning of the light guide plate with respect to the chassis and the combination of both can be achieved, and the reinforcing member can be fixed using the ribs. Moreover, since the ribs are provided in the recesses of the chassis, the reinforcing member is sandwiched between the chassis and the ribs, so that the fixed state is reinforced.

In order to achieve the above object, the reinforcing member may be made of a linear member having elasticity, or may be made of an angle member, a pipe member, or a channel member. According to such a configuration, rigidity that can cope with expansion or deformation due to environmental changes of the light guide plate can be obtained according to the characteristics and shape of the material, and the deformation of the light guide plate is prevented by constructing a member having a moderate elasticity.

Further, in order to achieve the above object, in the information device of the present invention, the display panel and the light guide plate are embedded in a display body, the processing unit is embedded in the device body, and the display body is movable with respect to the device body. It is good also as a structure connected so that it may be possible. That is, the light guide plate has a structure in which the light guide plate is reinforced with a reinforcing member, and is incorporated in the display body together with the display panel, so that the display body can be configured to be rotatable with respect to the device body.

As described above, according to the present invention, since the light guide plate is reinforced by the reinforcing member, it is possible to prevent deformation of the light guide plate against a change in temperature and humidity of the use environment, thereby realizing a highly reliable display unit, light guide plate or information device. .

In addition, according to the present invention, the resistance to changes in temperature and humidity of the use environment is increased, and the display quality due to the deformation of the light guide plate is not caused.

Further, according to the present invention, a reinforcing member can be provided in the rear portion of the light guide plate, the reinforcing structure of the light guide plate can be realized, and the light guide plate can be made thin by reinforcement. Can contribute.

Other objects, features, and advantages of the present invention will become more apparent by reference to the accompanying drawings and the embodiments.

1 is a diagram illustrating a basic structure of a display unit.

2 is a perspective view illustrating a frame used for the display unit.

3 is a view showing a light guide plate provided with a reinforcing frame at a rear surface thereof.

4 is a diagram illustrating a display unit using a frame having a reinforcement frame.

5 is a perspective view showing the influence of the reinforcing plate provided in the light guide plate.

6 is a perspective view illustrating a display unit according to a first embodiment of the present invention.

7 is an exploded perspective view illustrating the reinforcing structure of the light guide plate.

8 is a cross-sectional view showing the reinforcing portion of the light guide plate reinforced with the reinforcing beam.

9 is a side view showing a light guide plate reinforced with a reinforcing beam.

10 is a perspective view illustrating a light guide plate and a reinforcement beam of a display unit according to a second embodiment of the present invention.

11 is a perspective view illustrating a light guide plate and a reinforcement beam of a display unit according to a third embodiment of the present invention.

12 is a perspective view illustrating a light guide plate and a reinforcement beam of a display unit according to a fourth embodiment of the present invention.

13 is a cross-sectional view showing a light guide plate reinforced with a reinforcing beam.

14 is an exploded perspective view showing a display unit according to a fifth embodiment of the present invention.

15 is a rear view illustrating the display unit according to the fifth embodiment.

Fig. 16 is a perspective view showing the form of the linear material used for the reinforcing beam.

17 is a perspective view showing the form of the linear material used for the reinforcing beam.

18 is a perspective view showing a form of a linear material used for the reinforcement beam.

19 is a perspective view showing the form of the linear material used for the reinforcing beam.

20 is a perspective view illustrating an information apparatus according to a sixth embodiment.

(First embodiment)

EMBODIMENT OF THE INVENTION The 1st Embodiment of this invention is described with reference to FIGS. 6-9. FIG. 6 is a perspective view showing the reinforcing structure of the light guide plate of the display unit, FIG. 7 is an exploded perspective view showing the reinforcing structure of the light guide plate, FIG. 8 is a sectional view of the light guide plate showing the reinforcing portion, and FIG. 9 shows a reinforcing structure of the light guide plate. Side view.

As shown in Fig. 6, the display unit 40 includes a light guide plate 44 and a reflective sheet 46 on the back surface of a display panel 42 such as a liquid crystal display (LCD) panel, and at the same time a display unit ( A light source 48 made of, for example, a cold cathode tube is provided on the light incident side of the light guide plate 44, and the light 50 generated from the light source 48 passes through the light guide plate 44 at the side surface of the light guide plate 44. The back side of (42) is irradiated. The light guide plate 44 is a light guide member interposed between the light source 48 and the display panel 42, and is configured to irradiate the light 50 from the light source 48 to the back side of the display panel 42 uniformly. For example, it is formed with transparent light guide materials, such as synthetic resin and glass. Although the light guide plate 44 of this embodiment is a rectangular thin plate, as shown in FIG. 7, if the shape and function are grasped | ascertained, the light-incident surface part 52, the reflective surface part 54, and the light-emitting surface part 56 ), The side portions 58, 60, and 62 have a flat hexahedron.

The light incident surface portion 52 is a surface portion that receives light from the light source 48, and the thickness t ₁ of the light incident surface portion 52 is larger than the thickness t ₂ (<t ₁ ) of the opposing axial surface portion 58. The light incident area of the light 50 is set large. The reflecting surface portion 54 is a surface portion that reflects light 50 of the reflective sheet 46 and diffusely reflects the light 50 and guides the light emitting surface portion 56 to receive the light 50 from the light incident surface portion 52. At the same time, in order to enhance the light reflection function, a surface that is inclined with respect to the light exit surface portion 56 and is not parallel to the light exit surface portion 56 is configured. The reflective sheet 46 has the same shape as the reflective surface portion 54, and the reflective surface portion 54 is formed on, for example, the uneven surface which causes diffuse reflection. In addition, the light exit surface portion 56 is a surface portion for outputting light 50 from the light source 48 toward the display panel 42 side, and is composed of, for example, a flat surface. The opposite side portions 60 and 62 have different thicknesses t ₁ and t ₂ (t ₁ > t ₂ ) between the light incident surface portion 52 and the side surface portion 58, and the reflective surface portion 54 and the light exiting surface. Since the part 56 comprises the surface which is not parallel, it comprises the trapezoidal surface.

The reinforcing beam 64 is attached as a reinforcing member between the side parts 60 and 62 of the light guide plate 44, and the reinforcing beam 64 is a side part 60 and 62 in the direction in which the light 50 is incident. ), And the light guide plate 44 is gripped by the reinforcement beam 64 provided between the side parts 60 and 62. That is, the reinforcement beam 64 is a hook portion as a bridge portion 66 that extends between the side portions 60 and 62 of the light guide plate 44 and a fixing portion for fixing the reinforcement beam 64 to both ends of the bridge portion 66. The fixing part 68 is provided, for example, and is formed of a metal wire made of metal such as stainless steel as a member having high rigidity and elasticity. In this embodiment, the bridge part 66 is comprised by the single beam. In addition, ribs 74 having a square shape formed of the same member as the light guide plate 44 are formed at the side portions 60 and 62 of the light guide plate 44, and each of the ribs 74 has a hook of the reinforcing beam 64. The government part 68 is caught, and the bridge part 66 is provided through the reflection sheet 46 in the back part of the light guide plate 44. In this embodiment, in order to fix to the spherical rib 74, each hook fixing part 68 is in the shape of the bend which hangs the member on the extension of the bridge part 66 along the peripheral surface part of the rib 74, and is fixed. In addition, the locking end portion 76 is bent so as to be wound around the rib surface 74.

In this configuration, the reinforcing action of the light guide plate 44 by the reinforcing beam 64 will be described.

Equal to the width (W ₂₎ of the side portions 58 of the reinforcement beam (64), each pawl fixing portion 68 light guide plate 44, the gap width (W ₁₎ of, or slightly smaller than the width (W _2), i.e. , W ₁ ≤ W ₂ is set. Such width setting can be performed arbitrarily by the length and the bending when the bridge portion 66 is formed of a metal wire. 8, when the reinforcing beam 64 is fixed to the light guide plate 44 by fixing the hook fixing part 68 to the ribs 74 of the side portions 60 and 62 of the light guide plate 44, the hook Tension or restoring force acts on the reinforcing beam 64 at the rear portion of the light guide plate 44 according to the width between the fixing portions 68 and the width of the light guide plate 44 provided therebetween, so that the side portion 60 of the light guide plate 44 is applied. And 62 are held between the hook fixing portions 68 of the reinforcing beam 64, while the bridge portion 66 is in a close state on the reflective sheet 46 on the back side of the light guide plate 44. Is maintained. As a result, the force F ₁ due to the tension acting on the reinforcing beam 64 or the restoring force to return to the original shape of the reinforcing beam 64 is determined by the side portion of the light guide plate 44 at the hook fixing portion 68 side. Between 60 and 62, it acts in the compression direction of the light guide plate 44. As shown in FIG. In this case, when the bridge portion 66 is bent to the light guide plate 44 side and adheres closely, the force F ₂ is applied from the bridge portion 66 side.

In the light guide plate 44 in which such a reinforcement beam 64 is provided and reinforced, the rigidity is strengthened and the deformation is prevented. In such a light guide plate 44, the resistance to environmental changes can be improved, and even if a change is made in the environmental temperature or the environmental humidity, the light guide plate 44 can be deformed and the flat state at the time of manufacture can be maintained. Therefore, contact with the display panel 42 due to deformation, deterioration of display quality due to contact, and the like can be prevented.

For example, in the molded acrylic plate, it is understood that the deformation in the high temperature and high humidity state occurs due to the residual stress generated during the molding. However, when the molded article of the acrylic plate is used for the light guide plate 44, between the side parts 60 and 62. The light guide plate (a light guide plate) is configured to hold the side portions 60 and 62 of the light guide plate 44 with a reinforcing beam 64 having a bridge portion 66 therebetween and to bring the bridge portion 66 into contact with the rear side thereof. While the 44 is mechanically strengthened and the holding force of the reinforcing beam 64 can counteract the deformation caused by the residual stress on the light guide plate 44 side against the deformation occurring in the high temperature and high humidity state, the light guide plate 44 Deformation can be prevented.

In this embodiment, the holding form, but the form (W ₁ ≤W ₂₎ for holding the side portion between the 60, 62 of the light guide plate 44 in a pressurized state, the widthwise direction of the light guide plate 44 of the reinforcing beam (64) Slight elongation of the may act on the reinforcing beam 64 to obtain a spontaneous pressurization state, which may be used to prevent deformation of the light guide plate 44.

In addition, in this embodiment, the bridge part 66 of this reinforcement beam 64 is provided with respect to the light guide plate 44 in the direction crossing with the incident direction of the light 50, ie, the rib 74 which is its fixed part. Is provided on the side portions 60 and 62 and the hook fixing portion 68 is attached, the reinforcing beam 64 can be installed to avoid the light source 48, so that the installation of the light source 48 is disturbed. none. In addition, since the bridge portion 66 is provided on the rear side of the light guide plate 44, the reinforcing beam 64 does not interfere with light diffusion in the light guide plate 44.

As shown in FIG. 9, the light guide plate 44 is an inclined surface portion formed by making the light incident surface portion 52 of the light 50 thick and the side surface 58 opposite to the light incident surface portion 52 thin. The bridge portion (a) in the space portion 80 between the reflective surface portion 54 formed and the virtual surface 78 assumed on the reflective surface portion 54 by the thickness t ₁ on the light incident surface portion 52 side. 66) can be configured. The bridge portion 66 is provided in the space portion 80 which is a free space, and the bridge portion 66 is settled within the thickness t ₂ of the light guide plate 44 and the reflective sheet 46 in the plane of the virtual surface 78. This does not increase the thickness of the light guide plate 44, and therefore does not increase the thickness of the display unit 40. That is, the reinforcement beam 64 is provided in the rear part of the light guide plate 44, and even if the thickness of the light guide plate 44 is added to the reinforcement beam 64, the thickness t ₁ of the light incident surface part 52 of the light guide plate 44 is provided. The range does not exceed). In other words, when the display unit 40 is made to have the same thickness as before, the display unit 40 can be realized with improved resistance to environmental changes, and the light guide plate (for example, the rigidity is increased by the installation of the reinforcement beam 64). Since the 44 can be formed thin, the display unit 40 can be made thinner and lighter. In this embodiment, since the reinforcement beam 64 is provided in the thickness which added the thickness of the reflective sheet 46, the installation of the reinforcement beam 64 is the thickness t of the light incident surface part 52 of the light guide plate 44. ₁ ) It is installed with room to spare.

(2nd embodiment)

A second embodiment of the present invention will be described with reference to FIG. 10. 10 is a perspective view illustrating a reinforcement structure using a reinforcement beam according to the second embodiment.

The reinforcement beam 64 which concerns on this 2nd Embodiment comprises the bridge part 66 by the beam 66A, 66B of the upper and lower two lines by looping a metal wire, and the rib 74 of the light guide plate 44. The U-shaped hook fixing portion 68 to be hooked to the rib 74 is bent.

With such a configuration, since the bridge portion 66 having the gap corresponding to the width W ₃ of the rib 74 has the beams 66A and 66B, the holding of the light guide plate 44 is maintained. The strength is increased, and the reinforcement can be increased, so that the deformation of the light guide plate 44 due to the change of the environmental temperature or the environmental humidity can be prevented, and the display unit 40 is used by using the reinforced light guide plate 44. If comprised, the same effect as 1st Embodiment can be acquired.

(Third embodiment)

A third embodiment of the present invention will be described with reference to FIG. It is a perspective view which shows the reinforcement structure using the reinforcement beam which concerns on 3rd Embodiment.

The reinforcement beam 64 which concerns on this 3rd Embodiment bends the U-shaped hook fixing part 68 which loops a metal wire and hangs on the rib 74 of the light guide plate 44 at the rib 74 side, The bridge portion 66 is composed of a plurality of beams 66A and 66B, and the middle portion thereof has a cross beam structure formed by combining the bundle portions by combining the coupling portions 66C.

With such a configuration, since the beams 66A and 66B of the bridge portion 66 are coupled at the engaging portion 66C of the intermediate portion, the reinforcement beam 64 is further strengthened and the light guide plate 44 is further reinforced. . Therefore, the deformation of the light guide plate 44 due to the change of the environmental temperature and the environmental humidity can be prevented, and the display unit 40 is constructed using the reinforced light guide plate 44, and the same effect as in the above embodiment can be obtained. You can get it.

(4th Embodiment)

A fourth embodiment of the present invention will be described with reference to FIGS. 12 and 13. 12 is a perspective view showing a reinforcing structure using a reinforcing beam according to a fourth embodiment, and FIG. 13 is a cross-sectional view showing a part of the reinforcing structure.

The reinforcement beam 64 which concerns on this 4th Embodiment forms the contact part 70 which protrudes to the light guide plate 44 side, and is in contact with the bridge part 66 with a pair of bend part 72. As shown in FIG.

In such a configuration, as shown in FIG. 13, the hook fixing portion 68 is fixed to the ribs 74 of the side portions 60 and 62 of the light guide plate 44 so that the reinforcing beam 64 is attached to the light guide plate 44. When fixed, tension or restoring force acts on the reinforcement beam 64 at the rear portion of the light guide plate 44 in the width direction between the hook fixing portions 68, so that the side portions 60 and 62 of the light guide plate 44 are connected to the reinforcement beam ( While being held between the hook fixing portions 68 of 64, the contact portion 70 is kept in close contact with the reflective sheet 46 on the back side of the light guide plate 44. As a result, the light guide plate 44 has a force F ₁ and a contact portion (from the hook fixing portion 68 side) by the tension acting on the reinforcing beam 64 or the restoring force to return to the original shape of the reinforcing beam 64. A force F ₂ acts on the light guide plate 44 from the 70) side to balance the light guide plate 44.

(5th Embodiment)

A fifth embodiment of the present invention will be described with reference to FIGS. 14 and 15. 14 is an exploded perspective view showing a display unit according to a fifth embodiment, and FIG. 15 is a rear view showing the assembled display unit.

The display unit 40 has a rectangular frame 82 made of metal, which has a display panel 42, an optical system laminated sheet 43, a light guide plate 44, and a reflective sheet 46. ), A chassis 84 made of synthetic resin is provided. The optical system laminated sheet 43 constitutes sheets having functions of brightness adjustment and light diffusion. In this embodiment, two lens sheets 43C and 43D are laminated on two light diffusion sheets 43A and 43B. It is. A hook fixing portion 86 for fixing the chassis 84 is formed on the side of the frame 82, and the projection 88 formed on the side of the chassis 84 is inserted into the hook fixing portion 86, thereby providing a frame. The 82 and the chassis 84 are coalesced, and the display panel 42, the optical laminated sheet 43, the light guide plate 44, and the reflective sheet 46 are sandwiched and held therebetween. In addition, ribs 74 which are used for fixing the reinforcement beam 64 together with positioning are formed at both side portions of the light guide plate 44, and ribs 74 are provided in the chassis 84 corresponding to the ribs 74. The recessed part 90 (FIG. 15) which inserts and fixes the rib 74 with the positioning of the is formed.

The light guide plate 44 is attached to the reinforcement beam 64 by engaging the hook fixing portion 68 of the reinforcement beam 64 to the rib 74 before being incorporated into the chassis 84. As described above, the light guide plate 44 is reinforced by the reinforcing beam 64.

In addition, the light guide plate 44 to which the reinforcing beam 64 is attached to the rib 74 is positioned by inserting the rib 74 into the recess 90 of the chassis 84 to be integrated with the chassis 84. . At this time, the reinforcing beam 64 attached to the rib 74 is inserted into the recess 90 of the chassis 84, and is gripped and fixed between the rib 74 and the chassis 84 of the light guide plate 44. do. As a result, the fixed strength of the reinforcement beam 64 is strengthened by coalescing the chassis 84 and the light guide plate 44.

The cold cathode tube is attached to the chassis 84 as the light source 48, and a control board 92 is provided as a control device for display control of the display panel 42. 94A), a plurality of driver ICs 94B, and the like are provided. The light source 48 is powered by an inverter power source or the like through the plug 98 attached to the end of the wire 96.

As such, the reinforcing beam 64 for reinforcing the light guide plate 44 is made of a linear material such as a metal wire, and furthermore, since the reinforcing beam 64 is attached in the form of bridging the central portion of the light guide plate 44, Without damaging the installation space of the control board 92 of the back part side of 44, also in this embodiment, the control board 92 is provided with the back part of the light guide plate 44 with a margin. That is, a control device such as the control board 92 and the control IC 94A is provided on the rear portion of the light guide plate 44, and the thickness of the control device and the light guide plate 44 is the light incident surface portion 52 of the light guide plate 44. Since it is in the range of the thickness t ₁ , the thickness of the display unit 40 is reduced. Further, the control IC 94A and the driver IC 94B on the control board 92 may be set and arranged at a free position on the upper surface of the control board 92 without being restricted by the arrangement by the reinforcing beam 64. Can be. As a result, the degree of freedom in designing the control circuit is increased.

If the position of the rib 74 is set at a position near the height center of the display panel 42, the light guide plate 44 becomes wedge-shaped and gently thin (Fig. 9), and as described above, the reinforcing beam The space for installing 64 is secured, and the thickness of the display unit 40 does not increase. In addition, since the reinforcing beam 64 is attached to the back side of the light guide plate 44 after the light guide plate 44 and the reflective sheet 46 (that is, the reflecting plate) are bonded at the time of assembly of the display unit 40, the reinforcement is performed. The beam 64 does not affect the optical system such as the light guide plate 44 at all.

In addition, since the reinforcing beam 64 is fixed by using the rib 74 used for fixing and positioning the light guide plate 44 to the chassis 84, since the reinforcing beam 64 is not a structure that blocks incident light or diffused light to the light guide plate 44. This does not affect light irradiation to the display panel 42 and does not reduce the display quality. In addition, since the reinforcing beam 64 is provided on the light guide plate 44 side and is fixed to the light guide plate 44 to reinforce the light guide plate 44, the reinforcement beam 64 may be applied to the display unit 40 having no frame 82. Can be.

On the other hand, the linear material constituting the reinforcing beam 64 may use, for example, a round rod-shaped metal wire 100 as shown in FIG. 16, and as shown in FIG. 17, an angle of L-shaped cross section. The ash 102 may be used, as shown in FIG. 18, the pipe 104 may be used, and as shown in FIG. 19, the channel member 106 having a C-shaped cross section may be used. When the metal wire 100 is used, the stiffness of the reinforcing beam 64 depends on the rigidity of the material, and when the angle material 102, the pipe material 104, or the channel material 106 is used, the rigidity of the material is provided. In addition, it is reinforced by the shape.

In addition, fixing of the light guide plate 44 and the reinforcement beam 64 forms a locking recess in the side portions 60 and 62 of the light guide plate 44, inserts the end of the reinforcing member into each of the locking recesses, and merges them together. A configuration may be employed.

In this embodiment, an example in which the driver IC 94B which is a part of the control device is provided on the chassis 84 is shown. It may be arranged so as to fall within the thickness t ₁ (FIG. 9) of the light incident surface portion 52 of the light guide plate 44.

(6th Embodiment)

A sixth embodiment of the present invention will be described with reference to FIG. 20. 20 schematically shows an appearance of, for example, a notebook PC (so-called notebook computer) as the information apparatus according to the sixth embodiment.

The notebook PC 110 has a thin body of the machine body 112 and a display body in which rotation around the predetermined rotation axis 114 (arrow N) is freely connected to the machine body 112 by the hinge portion 116 ( 118). A so-called motherboard (not shown) is inserted into the body of the apparatus main body 112, and a CPU (central arithmetic processing unit), a memory, and the like are mounted on the motherboard as a processing unit that performs information processing. The CPU performs arithmetic processing based on, for example, an OS (operating system) or application software that temporarily accepts the memory. In carrying out the arithmetic processing of the CPU, the user can input various data or commands by an input device such as the keyboard 120 or the pointing device 122 mounted on the apparatus main body 112.

The display body 118 has a base 124 and a cover 126 covering the base 124. In order to display the above-mentioned information processing between the cover 126 and the base 124, the above-mentioned display unit 40 (FIG. 6) is provided, and the display panel of a rectangular liquid crystal display (LCD) ( 42) is accepted. On the screen of the display panel 42, graphics and text are displayed and displayed based on the arithmetic processing of the CPU described above. The cover 126 or the base 124 may be molded from a resin material such as polycarbonate, for example.

In such a configuration, the configuration of the display unit 40 built in the notebook PC 110 (FIGS. 6, 14, and 15), the reinforcing structure of the light guide plate 44 (FIGS. 6 to 13), and the reinforcing beam ( Since the raw material (FIGS. 16-19) of 64 is already as mentioned above, the detail is abbreviate | omitted. By applying the above-described reinforcing structure of the light guide plate 44 to the notebook PC 110, the resistance to temperature and humidity changes in the use environment is increased, thereby realizing a highly reliable information device.

On the other hand, in this embodiment, the present invention has been described with respect to an information device comprising a device body and a display body, but the present invention also applies to an information device in which the device body and the display body are integrated, such as a pen computer, a PDA, and a mobile phone. It can be carried out.

In addition, although this invention demonstrated this invention about the light source integrated in the information apparatus in this embodiment, even if an external light source is used, this invention can be implemented.

As described above, although the most preferred embodiment of the present invention has been described, the present invention is not limited to the above description, but is described in the claims, or based on the gist of the invention disclosed in the examples, the skilled person It goes without saying that various modifications and changes can be made to the present invention and that such modifications and changes are included in the scope of the present invention.

The display unit, the light guide plate, and the information device of the present invention reinforce the light guide plate with a reinforcing member, thereby improving the resistance to environmental temperature and environmental humidity and enabling use in a harsh environment, and this reinforcing structure is designed to be thin and light, and to be widely used. It can be useful, for example.

Claims (34)

A display unit comprising a light guide plate for guiding light of a light source for display of a display panel, And a reinforcing member that extends the light guide plate between side surfaces of the light incidence direction and the cross direction. The method of claim 1, The light source is installed at the side of the display unit, And the light guide plate is formed by making the light incident surface portion thicker and thinning the side portion on the side opposite to the light incident surface portion to reflect the light from the back portion of the light guide plate to guide the back portion of the display panel. The method of claim 2, The reinforcing member is provided on the back side of the light guide plate, The thickness of the light guide plate and the reinforcing member does not exceed the thickness of the light incident surface portion of the light guide plate. The method of claim 2, And a control device is provided on the rear surface of the light guide plate, and the thickness of the light guide plate and the control device does not exceed the thickness of the light incident surface part of the light guide plate. The method of claim 1, The reinforcing member is fixed to the side portion of the light guide plate. The method of claim 1, The reinforcing member is made of a plurality of beams. delete delete The method of claim 1, A chassis installed at a periphery of the light guide plate; A rib formed on a side portion of the light guide plate; And A recess formed in the chassis corresponding to the rib, And the fixed rib of the reinforcing member is inserted into the recess of the chassis. delete The method of claim 1, The reinforcing member is made of an angle member, a pipe member or a channel member. A light guide plate for inducing light of a light source for displaying a display panel, And a reinforcing member disposed on a rear side of the light guide plate, the reinforcing member extending between side surfaces of the light incident direction and the cross direction. delete delete delete delete delete delete delete delete delete delete A processing unit which performs information processing; A display panel for displaying the information processing; And A light guide plate for inducing light of a light source for displaying the display panel An information device comprising: And a reinforcing member that extends the light guide plate between side surfaces of the light incidence direction and the cross direction. delete delete delete delete delete delete delete delete delete delete delete

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