JP5252704B2 - Liquid crystal display - Google Patents

Description

  The present invention relates to a liquid crystal display device having a liquid crystal panel for displaying information such as images and characters, and in particular, has a structure that is less likely to cause a problem that a light source lamp of a backlight device is not turned on by an external force. The present invention relates to a liquid crystal display device.

  In recent years, the use of liquid crystal panels as thin and light flat display elements has progressed, and liquid crystal display devices equipped with a backlight device have been used as stationary display devices such as computer displays and TV receivers, as well as notebook computers. And PDAs (Personal Digital Assistants), portable DVD players, electronic dictionaries, and displays for portable devices such as game machines and mobile phones.

  The liquid crystal panel is usually handled as a liquid crystal module that integrates a liquid crystal panel and a backlight device for displaying information on the liquid crystal panel, and further includes a drive circuit that drives the liquid crystal panel and the backlight device. A display device using a liquid crystal module is assembled so that the liquid crystal module is sandwiched between a front case located on the display surface side of the liquid crystal panel and a rear case located on the back side.

  Further, when the liquid crystal display device is used as a display of a portable device such as a notebook computer, the liquid crystal display device is attached as a lid that can be rotated with respect to the portable device body by a hinge mechanism or the like, so that the user can When the lid is rotated when the device is used, a configuration is adopted in which the device main body on which a keyboard or the like is disposed and the information display surface of the liquid crystal panel formed inside the lid appear simultaneously.

Here, the liquid crystal panel is generally made of glass, and when an external force is applied, the panel may be bent to cause display information to be disturbed, or when the applied external force is large, the liquid crystal panel itself may be damaged. For this reason, in the liquid crystal display device, the position of the liquid crystal module is regulated by the ribs formed on the inner surface of the front case, and the liquid crystal module and the front case are fixed to the minimum necessary, and the liquid crystal module is attached to the front case. A system is adopted in which the body is sandwiched between the body and the back casing. As such a liquid crystal display device, a configuration is disclosed in which a liquid crystal panel and a backlight device are provided as a liquid crystal module, and these are sandwiched while being regulated by ribs formed on a front housing and a back housing. (See Patent Document 1 and Patent Document 2).
JP-A-11-102160 JP 2003-167235 A

  As described above, in the liquid crystal display device in which the position of the liquid crystal module is regulated by the rib formed on the inner surface of the front casing or the rear casing and sandwiched between the front casing and the rear casing. In some cases, the backlight device is turned off when used as a lid portion.

  An object of the present invention is to solve such a problem of the prior art, and an object of the present invention is to obtain a liquid crystal display device capable of preventing a problem that the backlight device is not turned on by an external force applied during use.

In order to solve the above problems, a liquid crystal display device of the present invention includes a liquid crystal module including a liquid crystal panel, a backlight device that irradiates the liquid crystal panel with irradiation light, and a front surface located on the display surface side of the liquid crystal panel. A housing and a rear housing located on the back side of the liquid crystal panel, and the liquid crystal module is positioned within the front housing by a rib formed on the inner surface of the front housing, while the front housing is A liquid crystal display device sandwiched between a body and the rear housing, wherein the distance between the rib located near the end of the light source lamp of the backlight device and the side surface of the liquid crystal module is determined by the light emitting region of the light source lamp It is characterized in that it is larger than the interval between the rib arranged at the position corresponding to the side surface of the liquid crystal module .

  The display device of the present invention can prevent a problem that the backlight device is not turned on even when an external force is applied to the liquid crystal display device when the liquid crystal display device is used.

  A display device according to the present invention includes a liquid crystal module, a liquid crystal module including a backlight device that irradiates the liquid crystal panel with irradiation light, a front case located on a display surface side of the liquid crystal panel, and the liquid crystal panel A rear case located on the rear side, and the liquid crystal module is positioned between the front case and the rear case while the position of the liquid crystal module is regulated in the front case by a rib formed on the inner surface of the front case. In the sandwiched liquid crystal display device, a predetermined gap is formed between the rib located near the end of the light source lamp of the backlight device and the side surface of the liquid crystal module.

  By doing so, it is effective that the external force is transmitted to the electrode portion located at the end of the light source lamp in the backlight device even when the front case or the back case is deformed due to the external force. Can be prevented. For this reason, it is possible to avoid a problem in which the backlight device is not turned on due to an undesired force acting on the electrode portion of the light source lamp and the disconnection of the power supply lead for supplying driving power.

  In the liquid crystal display device according to the present invention, hinge mechanisms are formed at both ends of a side edge portion located on the side where the light source lamp is formed in the liquid crystal module, and the hinge mechanism rotates the device main body. It is preferable that it is movably attached. In this way, when hinge mechanisms are formed at both ends on the side where the light source lamp is formed and the liquid crystal display device is rotated and used, an external force is applied to the front casing near the light source lamp. In the liquid crystal display device of the present invention, such a problem can be effectively prevented by the above configuration.

  Further, it is preferable that a power cable for supplying a driving voltage to the light source lamp is soldered to an electrode terminal drawn from an electrode portion disposed at an end portion of the light source lamp. In such a configuration, the external cable applied to the liquid crystal module from the front casing tends to cause the power cable to be disconnected, but this can be effectively prevented.

  Furthermore, it is preferable that an interval between the rib located near the end of the light source lamp and a side surface of the liquid crystal module is 0.1 mm or more and 0.5 mm or less.

  Hereinafter, as an embodiment of the liquid crystal display device according to the present invention, a case where the liquid crystal display device is used as a lid portion of a notebook computer will be described as an example.

  FIG. 1 is a perspective view showing an external appearance of a notebook computer that includes a liquid crystal display device as a lid as an embodiment of the present invention. As shown in FIG. 1, a notebook personal computer 100 according to this embodiment is formed of a lid 1 that is a liquid crystal display device and a device main body 2. The lid 1 is one side edge of a built-in liquid crystal module. 1, that is, in the case of FIG. 1, the hinge mechanism 3 provided at both ends of the side edge on the lower side of the display area can be rotated as shown by an arrow A in FIG. 1.

  As shown in FIG. 1, the lid 1 is open to the device main body 2 so that the display area of the liquid crystal panel 21 can be seen. The front housing 10 is arranged so as to cover a so-called invalid area around the display area of the liquid crystal panel 21. The configuration of the lid 1 will be described later with reference to FIG.

  A keyboard, a touch pad, a disk drive device, and the like are provided on the surface of the device main body 2 as a normal configuration of the notebook computer 100. Further, the device main body 2 contains a circuit configuration such as a CPU and a memory, a rechargeable battery, various drive devices, and the like. Since the configuration of the device main body 2 is not particularly different from the configuration of a conventionally known notebook personal computer, detailed description and illustration thereof are omitted.

  FIG. 2 is an exploded perspective view showing a main configuration of the liquid crystal display device which is the lid portion 1 of the notebook computer 100 of the present embodiment. For convenience of explanation, FIG. 2 is a perspective view of the lid 1 from the back side where the hinge mechanism 3 is formed.

  As shown in FIG. 2, the lid 1 of the notebook computer 100 according to the present embodiment includes a liquid crystal panel 21 and a backlight device 22 that emits irradiation light for displaying information on the liquid crystal panel 21. Is sandwiched between a front case 10 located on the display surface side of the liquid crystal panel 21 and a back case 30 located on the back side of the liquid crystal panel 21. Further, a buffer member 40 for protecting the liquid crystal module 20 from an impact due to an external force is disposed on the back surface of the liquid crystal module 20.

  The front housing 10 is made of, for example, polycarbonate ASA resin (PC + ASA) in which ASA resin is mixed in polycarbonate (PC). Further, glass fibers may be mixed for reinforcing the strength. A window portion 11 corresponding to the display area of the liquid crystal panel 21 is formed in the central portion of the front housing 10, and the front housing 10 has a “B” shape as a whole. Then, an outer peripheral wall portion 13 constituting a side wall of the lid portion 1 of the notebook computer 100 extends to the liquid crystal panel side 21 from the periphery of the bottom surface portion 12 that also serves as an escutcheon frame that covers the invalid area around the display area of the liquid crystal panel 21. I'm out. In addition, an annular rib 14 for regulating the fixing position of the liquid crystal module 20 is intermittently formed in part inside the outer peripheral wall portion 13 at a predetermined interval and in parallel with the outer peripheral wall portion 13. Has been.

  In the front case 10 of the present embodiment, a gap of a predetermined width is formed between the rib 14 a located near the end of the light source lamp of the backlight device 22 and the side surface of the liquid crystal module 20. A detailed configuration near the lamp end will be described later. The annular rib 14 is appropriately formed with a concavo-convex portion in the main surface direction of the front housing 10 in order to ensure its strength. In addition, an opening 15 corresponding to the convex portion 26 formed in the liquid crystal module 20 is formed in the outer peripheral wall portion 13 and the annular rib 14 of the front housing 10.

  The liquid crystal module 20 is configured such that a transmissive liquid crystal panel 21 and a backlight device 22 that emits irradiation light necessary for displaying information on the liquid crystal panel 21 are accommodated in a module structure 23. A circuit board 24 on which a driving circuit for driving the liquid crystal panel 21 is mounted is disposed on the back side of the backlight device 22, and the circuit board 24 is connected to a panel end portion of the liquid crystal panel 21 by a flexible printed board 25. It is connected with the electrode part formed in this. Further, a light source driving substrate 28 on which a circuit for lighting a cold cathode fluorescent tube which is a light source lamp of the backlight device 22 is mounted is disposed on the back surface of the liquid crystal module 20 via a power lead 27.

  Since the liquid crystal panel 21 is a view seen from the back side in FIG. 2, the liquid crystal panel 21 is hidden behind the backlight device 22 arranged on the back side and cannot be directly seen in FIG. 2. In the notebook personal computer 100 according to the present embodiment, a conventionally known transmissive liquid crystal panel can be used, and thus detailed description thereof is omitted. As the liquid crystal panel 21 of the liquid crystal display device of the present embodiment, as a configuration, a so-called active matrix method in which a switching element is formed in each display pixel, and other driving methods such as a simple matrix method may be adopted. it can. In addition, as a method of applying a voltage, either a vertical alignment method in which a predetermined potential is applied between two opposing panels or a horizontal electric field method in which a voltage is applied in the surface direction of the panel should be adopted. Can do. Furthermore, the arrangement of display pixels is not limited at all, and color display or single color display is possible. Needless to say, a pair of polarizing plates (not shown) are arranged on both outer surfaces of the liquid crystal panel 21.

  The backlight device 22 employs a so-called edge light system (sometimes referred to as a side light system) that can be configured to be thinner. The edge-light type backlight device 22 makes incident light from a cold cathode fluorescent tube, which is a light source lamp, incident on a light guide plate having a size and a shape corresponding to the information display surface of the liquid crystal panel 21 from the side thereof. The uniform irradiation light is emitted to the entire information display area of the liquid crystal panel 21. The configuration of the electrode portion of the cold cathode fluorescent tube, which is the light source of the backlight device 22, will be described later with reference to FIG.

  The module structure 23 is basically a bottomed frame-shaped component made of a resin such as polycarbonate or a metal such as aluminum. As shown in FIG. 2, the module structure 23 used in the liquid crystal module 20 of the present embodiment has an opening formed on the bottom surface thereof for the purpose of reducing the weight of the display device. The back surface of the backlight device 22 can be seen from the opening. Similarly, in order to reduce the weight, the thickness of the members constituting the module structure 23 is 0.5 mm to 0.6 mm.

  In FIG. 2, a cold cathode fluorescent tube, which is a light source lamp, is arranged on the side where the hinge mechanism 3 (not shown) is provided, that is, on the side edge of the liquid crystal module 20 corresponding to the lower side of the display area. In the backlight device 22 of the present embodiment, the light emitting area of the cold cathode fluorescent tube is opposed to the entire side surface of the light guide plate, and the brightness of the irradiation light from the backlight apparatus is at the peripheral corner of the display area of the liquid crystal panel 21. This effectively prevents the brightness from becoming uneven. For this reason, the electrode part of the cold cathode fluorescent tube is provided so as to protrude outward from the light guide plate. In order to accommodate the electrode part of the cold cathode fluorescent tube and the component part for applying the lamp driving voltage to the electrode part, convex parts 26 are provided at both ends of the side edge part located below the display area of the module structure 23. Is provided.

  FIG. 3 is a partially enlarged view of the liquid crystal module 20 for explaining the configuration of the convex portion 26. 3 is a view of the liquid crystal module 20 as viewed from the display surface side of the liquid crystal panel 21, that is, the surface opposite to that in FIG.

  As shown in FIG. 3, the liquid crystal panel 21 is accommodated in the module structure 23. In addition, since the light guide plate 50 is disposed on the lower side so as to overlap the liquid crystal panel 21, it cannot be directly visually recognized in FIG. A cold cathode fluorescent tube 51 as a light source lamp is disposed in close contact with the end of the light guide plate 50. As described above, since the light emitting region that is the portion between the electrodes of the cold cathode fluorescent tube 51 faces the side surface of the light guide plate 50, the electrode portion 52 of the cold cathode fluorescent tube 51 is connected to the liquid crystal panel 21 from the light guide plate 50. It protrudes in the left-right direction in the display area, and is accommodated in a convex portion 26 formed in the module structure 23. A power cable 27 for supplying a driving voltage to the cold cathode fluorescent tube 51 is soldered to the electrode terminal 53 drawn out from the electrode portion 52 at a connection portion 54. The power cable 27 is bent in the convex portion 26 of the module structure 23, and is arranged along the cold cathode fluorescent tube 51 in the module structure 23, and pulled out to the back side of the module structure 23 as shown in FIG. And connected to the light source drive board 28. Further, the cold cathode fluorescent tube 51 that is usually used as a light source lamp has an electrode portion 52 at both ends thereof, so that the end of the cold cathode fluorescent tube 51 opposite to the side shown in FIG. The members are arranged symmetrically with those shown in FIG.

  In addition, although the liquid crystal module 20 of this embodiment showed the structure which laminated | stacked and accommodated the backlight apparatus 22 and the liquid crystal panel 21 in the module structure 23, the module structure 23 is essential as the liquid crystal module 20 of this invention. Is not. The liquid crystal module 20 of the present invention can be handled as a configuration in which the liquid crystal panel 21 and the backlight device 22 are simply laminated without using the module structure 23. In this case, the side surfaces of the liquid crystal module 20 mean the respective side surfaces of the liquid crystal panel 21 and the backlight device 22.

  In the present embodiment, a buffer member 40 is disposed on the back surface in the vicinity of the side edge portion of the module structure 23 constituting the outer shape of the liquid crystal module 20. In the present embodiment, a U-shaped elastic member 41 near the side edge of the end corresponding to the upper side of the display area of the liquid crystal panel 21 and the side edge of the end corresponding to the left and right sides of the display area of the liquid crystal panel 21. In addition, linear elastic members 42 arranged in a pair constitute a buffer member 40. The elastic members 41 and 42 are made of sponge-like polyurethane, and the external force applied to the front casing 10 and the rear casing 30 and the liquid crystal panel 21 prevents the liquid crystal panel 21 from being damaged or detached from the front casing 10. It is to prevent. The shape and material of the buffer member 40 are not limited to the above, and should be appropriately selected in consideration of the strength of the front casing 10 and the rear casing 30, the size of the liquid crystal panel 21, and the like.

  The rear housing 30 is a member that fits with the front housing 10 and holds the liquid crystal module 20. Further, in the notebook personal computer 100 according to the present embodiment, the rear housing 30 constitutes an outer member when the lid portion 1 is closed, and thus high strength is required. On the other hand, in consideration of the demand for weight reduction required for the notebook personal computer 100 which is a portable device, the back housing 30 of this embodiment is formed of a magnesium alloy molded body.

  On the outer surface 31 of the rear housing 30, a bonnet-like portion 32 is formed at the central portion as a reinforcing member for improving strength and a hood design. In addition, although not shown in FIG. 2, an uneven shape for reinforcement is appropriately formed on the inner surface of the rear housing 30. The side surface portion 33 of the outer surface housing 30 has a side wall structure protruding toward the front surface housing 10, and in the lid portion 1 of the present embodiment, the outer surface of the side surface portion 33 of the outer surface housing 30 is the front surface housing. 10 are fitted so as to be in contact with the inner surface of the outer peripheral wall portion 13. Further, the front end portion of the side surface portion 33 of the rear housing 30 is in contact with the inner surface of the bottom surface portion 12 of the front housing 10, so that the liquid crystal module 20 is sandwiched between the rear housing 30 and the front housing 10. A space is formed. In addition, this structure is an illustration to the last, Comprising: In the side part of a display apparatus, either the outer peripheral wall part 13 of the front housing | casing 10 or the side part 33 of the back housing | casing 30 may be arrange | positioned outside, Further, it is possible to adopt a configuration in which the outer peripheral wall portion 13 of the front housing 10 and the tips of the side surface portions 33 of the rear housing 30 are attached to each other. The front casing 10 and the rear casing 30 are fixed by a known fixing method such as screwing in a state where the liquid crystal module 20 is sandwiched.

  Further, the back housing 30 of the present embodiment is formed with a cover portion 34 that encloses the convex portion 26 of the liquid crystal module 20 and accommodates the hinge mechanism 3 (not shown in FIG. 2).

  FIG. 4 is a plan view showing the structure of the rib 14 in the vicinity of the end of the cold cathode fluorescent tube 51 that is a light source lamp of the backlight device 22, that is, in the vicinity of the electrode portion 52 of the cold cathode fluorescent tube 51. FIG. 4 is a view showing a state in which the liquid crystal module 20 is incorporated in the front case 10 and the position thereof is regulated by the ribs 14 formed on the inner surface of the front case 10. It is the figure seen from the back side of the panel 21. FIG. As in the case of FIG. 3, the cold cathode fluorescent tube 51 used as the light source lamp is usually configured to have the electrode portions 52 at both ends thereof, and therefore, the cold cathode fluorescent tube 51 shown in FIG. At the end opposite to the opposite side, each member is arranged symmetrically with that shown in FIG.

  As shown in FIG. 4, in the front case 10 of the present embodiment, the rib 14 a located in the module structure 23 of the liquid crystal module 20 is located in the vicinity of the convex portion 26 for accommodating the electrode portion 52 of the cold cathode fluorescent tube 51. However, it is arranged with a predetermined distance x between the module structure 23 forming the outer surface of the liquid crystal module 20 in the present embodiment.

  In the front case 10 of the present embodiment, as described above, the cold cathode fluorescent tube is provided by providing the predetermined interval x between the rib 14a located near the end of the cold cathode fluorescent tube 51 and the liquid crystal module 20. It is possible to prevent an undesired external force from being applied to the power supply cable 27 that supplies the drive voltage to the power supply 51 due to the deformation of the front casing 10 and to avoid problems such as the cold cathode fluorescent tube 51 being unlit. be able to. The reason will be described below.

  As described above, the ribs 14 formed on the inner surface 12 of the front housing 10 regulate the position of the liquid crystal module 20 with respect to the front housing 10. For this reason, the rib 14 is formed so as to contact the module structure 23 that forms the outer shape of the liquid crystal module 20. Also in FIG. 4, the rib 14 b for restricting the position of the liquid crystal module 20 from the lower side corresponding to the lower side of the display area of the liquid crystal panel 21 and the position of the liquid crystal module 20 corresponding to the left and right direction of the display area of the liquid crystal panel from the side. It can be seen that the ribs 14c are formed at a predetermined distance from the outer peripheral wall 13 and are in contact with the module structure 23.

  On the other hand, as shown in FIG. 3, the driving voltage for lighting the cold cathode fluorescent tube 51 of the backlight device 22 is supplied via the power cable 27 to the electrode portions 52 located at both ends of the cold cathode fluorescent tube 51. The voltage is applied to the electrode terminal 53 drawn from. Here, the light emitting region of the cold cathode fluorescent tube 51 and the light guide plate 50 need to be in contact with each other, and the power cable 27 cannot be disposed on the light guide plate 50 side of the cold cathode fluorescent tube 51. Further, in the backlight device 22 and the liquid crystal module 20, it is necessary to meet the demand for a reduction in size and thickness, and therefore it is difficult to arrange the power cable 27 in the thickness direction of the backlight device 22. For this reason, the power cable 27 is disposed on the side surface of the cold cathode fluorescent tube 51 opposite to the light guide plate 50. At this time, when an external force as indicated by an arrow F in FIG. 3 acts near the electrode portion 52 of the cold cathode fluorescent tube 51 of the module structure 23 where the power cable 27 is disposed, the module structure 23 is deformed inward. When the power cable 27 is pushed, a force as shown by an arrow f in the drawing acts to break the connection to the connection portion 54 between the power cable 27 and the electrode terminal 53.

  As described above, since the module structure 23 is formed of a thin member in order to reduce the weight of the liquid crystal module 20, it can be said that the module structure 23 has sufficient strength against an external force as indicated by an arrow F in FIG. Therefore, deformation is likely to occur. Further, when the liquid crystal display device is used as the lid 1 of the notebook personal computer 100 as in the case of the present embodiment, each time the lid 1 is rotated with respect to the device body 2, the front housing An external force that twists the body 10 acts. At this time, if the position regulating rib 14 formed on the inner surface of the front case 10 is in contact with the liquid crystal module 20 in the vicinity of the end of the cold cathode fluorescent tube 51, the deformation of the front case 10 is directly applied to the external force. F acts on the liquid crystal module 20.

  Therefore, by providing a predetermined interval x between the rib 14a disposed near the end of the cold cathode fluorescent tube 51 and the liquid crystal module 20 as in the front case 10 of the present embodiment, The deformation of the front casing 10 does not become the external force F as it is, and the disconnection between the electrode terminal 53 of the cold cathode fluorescent tube 51 and the power cable 27 can be effectively prevented.

  As can be seen from FIG. 2, the vicinity of the end portion of the cold cathode fluorescent tube 51 corresponds to one corner portion for the liquid crystal module 20. For this reason, eliminating the position-regulating rib 14 at all prevents the liquid crystal module 20 from dropping from the front housing 10 when a strong force is applied to the entire lid portion 1 that is a liquid crystal display device. It is not preferable from the viewpoint of doing. The distance x between the rib 14a near the end of the cold cathode fluorescent tube 51 and the liquid crystal module 20 depends on the size of the liquid crystal panel 21, the weight of the liquid crystal module 20, the strength and shape of the front case 10, and The degree of deformation of the front housing 10 affected by the configuration such as whether the liquid crystal display device is provided so as to be rotatable with respect to the device main body 2 should be determined as appropriate. As a specific value of x, for example, in the case of a display of a 15-inch wide class notebook personal computer 100 as in this embodiment, by setting x to 0.1 mm or more, it is possible to prevent the power cable 27 from coming off. The effect is obtained. Further, regarding the upper limit of the value of x, x is set to 0 from the viewpoint of preventing the liquid crystal module 20 from falling off and the ease of arrangement of the liquid crystal module 20 in the front housing 10 in the manufacturing process. 0.5 mm or less is preferable.

  In FIG. 4, ribs 14 a arranged near the end of the cold cathode fluorescent tube 51 regulate the position of the liquid crystal module 20, and ribs 14 b provided in a portion corresponding to the light emitting region of the cold cathode fluorescent tube 51. Although the example provided as discontinuous was shown, the shape of the rib 14 is not limited to this. For example, as shown in FIG. 5, the liquid crystal module 20 is abutted at a position corresponding to the light emitting region of the cold cathode fluorescent tube 51, and between the liquid crystal module 20 at a portion corresponding to the vicinity of the end of the cold cathode fluorescent tube 51. It is also possible to form one continuous rib 14d having a predetermined interval x.

  As described above, the embodiment of the liquid crystal display device according to the present invention has been described as being used as a lid portion of a notebook computer provided with a transmissive liquid crystal panel. However, this is merely an example, and the application object of the present invention is not limited thereto. It is not limited.

  The liquid crystal panel used in the liquid crystal display device of the present invention is not limited to a transmissive liquid crystal panel, and a semi-transmissive liquid crystal panel or the like may be used as long as it constitutes a liquid crystal module including a backlight device. it can.

  Moreover, although the example using the cold cathode fluorescent tube as the light source lamp of the backlight device is illustrated, it operates from the electrode portion formed at the end thereof, such as a hot cathode fluorescent tube, an EL lamp, and a light emitting element using a light emitting diode. Various other lamps can be used as long as power is supplied. Further, the arrangement position and number of the light source lamps are not limited to those arranged on the lower side in the display area of the liquid crystal panel described as the embodiment, but those arranged on the upper side of the display area, and vertically and horizontally. Various forms such as those arranged in a pair can be adopted. In this case, the number of light source lamps for which ribs are to be arranged at a predetermined interval from the liquid crystal module is not limited to one, and for a plurality of lamps, ribs arranged in the vicinity of the end portions of the lamps are arranged. It can also arrange | position so that it may have a predetermined space | interval between.

  In addition, the use as a liquid crystal display device is not limited to the case of being used as a display of a notebook personal computer, but can also be used as a display of various portable devices such as a PDA, a portable DVD player, an electronic dictionary, a game machine, and a mobile phone. Can do. In addition, even when used as a stationary display such as a computer display or a TV receiver, a tilt mechanism or a rotation mechanism that can tilt the display screen to a predetermined angle or change the orientation of the display screen, in particular. By applying the present invention mainly to those provided with the above, it is possible to protect the power supply portion to the light source lamp of the backlight device from an external force applied to the liquid crystal display device.

  Furthermore, as described in the present embodiment, even when the display device is used for a portable device, the device is not limited to the case where the display device is formed to be rotatable with respect to the device main body as a lid of the portable device. It can also be applied as a display device arranged as a display in a portion where the external shape of the screen does not change. In portable devices, it is difficult to adopt a strong structure as the structure of a display device in order to meet the demand for a compact and lightweight structure, and there are many opportunities for users to directly hold the outer surface It is. For this reason, it is considered preferable to exert the effect that the problem that the backlight device is not turned on can be avoided by applying the display device of the present invention as a display of a portable device.

  The liquid crystal display device according to the present invention is useful for reducing a problem that the backlight device as a light source of the liquid crystal panel is not turned on.

1 is a perspective view showing an overall configuration of a notebook computer according to an embodiment of the present invention. It is a disassembled perspective view of the schematic structure of the cover part of the notebook computer concerning embodiment of this invention. It is the elements on larger scale which show the structure of the light source lamp electrode part vicinity of the liquid crystal module concerning embodiment of this invention. It is the elements on larger scale which show an example of arrangement | positioning of the rib of the front housing | casing inner surface concerning embodiment of this invention. It is principal part sectional drawing which shows the cross-section of the cover part of a notebook personal computer. It is the elements on larger scale which show the other example of arrangement | positioning of the rib of the front housing | casing inner surface concerning embodiment of this invention.

Explanation of symbols

1 Lid (Liquid Crystal Display)
DESCRIPTION OF SYMBOLS 2 Apparatus main body 3 Hinge mechanism 10 Front case 14 (14a, 14b, 14c, 14d) Rib 20 Liquid crystal module 21 Liquid crystal panel 22 Backlight apparatus 27 Power supply cable 30 Back surface case 50 Light guide plate 51 Cold cathode fluorescent tube (light source lamp) )
52 Electrode part 53 Electrode terminal 54 Connection part 100 Laptop PC x Interval

Claims (4)

A liquid crystal module comprising a liquid crystal panel and a backlight device for irradiating the liquid crystal panel with irradiation light;
A front housing located on the display surface side of the liquid crystal panel;
A rear housing located on the back side of the liquid crystal panel,
The liquid crystal display device sandwiches the liquid crystal module between the front case and the back case while regulating the position of the liquid crystal module within the front case by a rib formed on the inner surface of the front case,
An interval between the rib located near the end of the light source lamp of the backlight device and the side surface of the liquid crystal module is set at a position corresponding to a light emitting region of the light source lamp, and the side surface of the liquid crystal module. A liquid crystal display device characterized in that it is larger than the interval .   The hinge mechanism is formed in the both ends of the side edge part located in the side in which the said light source lamp is formed in the said liquid crystal module, and it is rotatably attached with respect to the apparatus main-body part by the said hinge mechanism. A liquid crystal display device according to 1.   3. The liquid crystal display device according to claim 1, wherein a power cable for supplying a driving voltage to the light source lamp is soldered to an electrode terminal drawn from an electrode portion disposed at an end of the light source lamp.   4. The liquid crystal display device according to claim 1, wherein a distance between the rib located near the end of the light source lamp and a side surface of the liquid crystal module is 0.1 mm or more and 0.5 mm or less.

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