JP2005283863A - Liquid crystal module - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a liquid crystal module which is free of trouble during display by preventing a support frame from twisting as the liquid crystal module is made thin and lightweight, and so on. <P>SOLUTION: The liquid crystal module 1 equipped with a liquid crystal panel 10 and the frame-shaped support frame 60 which stores and supports a back light 20 has the support frame 60 prevented from twisting by coupling a lamp house 23 and a back lid 50, coupled with the support frame 60, with the support frame 60 by using a coupling means of canceling stress applied to the support frame 60, specifically, a right screw and a left screw. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a liquid crystal module, and more particularly to a support frame that supports a liquid crystal panel, a light guide plate, and the like constituting the liquid crystal module.

  In place of the CRT display devices that have been used in the past, recently, a thin liquid crystal display device having one feature has been put into practical use, and is used in various forms such as a TV, a monitor for a personal computer, and a mobile phone.

  Unlike a self-luminous display device such as a CRT or PDP, this liquid crystal display device uses a backlight in addition to a display panel. There are two types of backlights, one is the so-called direct type backlight used for large TVs and the other is the so-called sidelight type backlight used for mobile applications such as laptop monitors. is there.

  Patent Document 1 describes a liquid crystal display device using a sidelight type backlight, and the display unit 210 and the backlight assembly 220 are fixedly supported by a mold frame 400 composed of four members. In the mold frame, each of the four component members is formed with a coupling portion (coupling hole, coupling hole), and the component members are coupled to each other by a coupling screw through the coupling portion.

Similarly, Patent Document 2 describes a liquid crystal display device using a sidelight-type backlight, and a component 51 is held between the casing 51 that houses a light guide plate, an optical sheet, and the like. A frame plate 58 is shown. Although there is no specific description regarding the fixing of the casing 51 and the frame plate 58, a screw is used to firmly connect both members even if the engaging means is provided on the side wall or the like. Are generally combined.
JP 2001-183627 A (FIGS. 3 and 4) JP 2000-19512 A (FIG. 1)

  Liquid crystal modules are becoming thinner, lighter, and narrower because of their characteristics. In particular, liquid crystal modules used for monitors for laptop computers, which are used for mobile applications, are prominent, and the liquid crystal panels and light guide plates used for backlights can be made thinner. As for the support frame that supports the optical plate or the like, the support frame is resin-molded, the support frame is made into a frame shape instead of a box shape, or a reinforcement frame of the frame-like support frame (for example, a frame provided in parallel with the support frame in the frame ) To reduce the thickness and weight to the utmost limit.

  With the thinning, weight reduction, and narrowing of the frame of such a liquid crystal module, new problems related to the frame-shaped support frame have occurred. First, since the support frame is made of resin, the support frame itself is easily twisted. Moreover, it becomes easier to twist by reducing a reinforcement frame. Further, when a member constituting the support frame is fixed with a coupling screw as in Patent Document 1 or a frame plate is fixed with a screw to the support frame as in Patent Document 2, the support frame is caused by stress in a direction in which the screw is tightened. It will be twisted. If a liquid crystal panel or optical sheet is placed with the support frame twisted, stress is applied to the liquid crystal panel or optical sheet, causing various problems such as ripples in the liquid crystal panel or wrinkles in the optical sheet. .

  Accordingly, an object of the present invention is to provide a liquid crystal module that prevents the support frame from being twisted due to the reduction in thickness and weight of the liquid crystal module and that does not cause a problem during display.

  The liquid crystal module of the present invention is a liquid crystal module comprising a liquid crystal panel, a backlight, and a frame-shaped support frame that houses and supports the liquid crystal panel and the backlight. It has the member couple | bonded with a support frame, This member is couple | bonded with this frame-shaped support frame by the coupling | bonding means which cancels the stress added to this frame support frame.

  The liquid crystal module of the present invention is a liquid crystal module comprising a liquid crystal panel, a backlight, and a frame-shaped support frame that houses and supports the liquid crystal panel and the backlight. The frame-shaped support frame includes a plurality of members. Are coupled to each other, and the members are coupled by a coupling means that cancels stress applied to each other.

  The backlight includes a linear light source, a light guide plate, and a lamp house, and a member coupled to the frame-shaped support frame is a lamp house constituting the backlight. It is a liquid crystal module.

  The backlight includes a linear light source, a light guide plate, and a lamp house, and the member coupled to the frame-shaped support frame is a back cover that covers the lamp house from the back side. This is a liquid crystal module.

  The coupling means is a liquid crystal module characterized by a right screw that is tightened by turning to the right and a left screw that is tightened by turning to the left.

  The coupling means is a liquid crystal module formed near the corner of the frame-shaped support frame.

  In the liquid crystal module, an optical sheet is disposed between the liquid crystal panel and the backlight.

  According to the liquid crystal module of the present invention, the support frame can be prevented from being twisted due to the coupling of the members coupled to the support frame, and the twist of the support frame configured by coupling a plurality of members can be prevented. It is possible to prevent display defects caused by thinning, lightening, and narrowing the frame of the liquid crystal module, such as preventing occurrence of ripples in the liquid crystal panel and occurrence of wrinkles on the optical sheet.

  Embodiments of the present invention will be described below with reference to the drawings. 1 is a plan view of the liquid crystal module observed from the back side, FIG. 2 is a cross-sectional view taken along the line AA in FIG. 1, and FIG. 3 is an exploded perspective view of the main part of FIG. In the cross-sectional view of FIG. 2, the lower side of the drawing shows the back side of FIG.

  The liquid crystal module 1 includes a liquid crystal panel 10, a backlight 20, a plurality of optical sheets 30, a front frame 40, a back cover 50, and a support frame 60.

  In the liquid crystal panel 10, a pair of glass substrates 11 and 12 are bonded together with a liquid crystal material (not shown) interposed therebetween, and polarizing plates (not shown) are provided on the surfaces opposite to the surfaces of the glass substrates 11 and 12, respectively. It is pasted.

  The backlight 20 includes a light guide plate 21, a linear light source 22, a lamp house 23, and a reflection plate 24. The light guide plate 21 has a size substantially equal to that of the liquid crystal panel 10 and is formed of a rectangular acrylic plate having a predetermined dot pattern formed on the surface thereof. The linear light source 22 is a cold cathode tube disposed along one side surface of the long side of the light guide plate 21. Both ends of the linear light source 22 are provided with L-shaped lamp holders 22a. The lamp holder 22a is made of an insulating elastic member such as rubber. Lead wires 22b extend from both ends of the linear light source 22, and the lead wires 22b are connected to an inverter substrate (not shown) disposed outside the liquid crystal module 1 via a connector portion (not shown). (Not shown).

  The lamp house 23 is made of a sheet metal having a U-shaped cross section so as to cover the entire linear light source 22. The lamp house 23 holds the linear light source 22 inside and is disposed so as to sandwich the side surface of the light guide plate 21. The reflection plate 24 is sized to cover the back side of the light guide plate 21 and is arranged to prevent light from the linear light source 22 from leaking out of the liquid crystal module 1 from the back side of the light guide plate 21. It is supported and fixed between the light guide plate 21 and the lamp house 23, by the back cover 50 and the support frame 60.

  The plurality of optical sheets 30 are disposed between the liquid crystal panel 10 and the backlight 20, and include, for example, a diffusion sheet 31 and a prism sheet 32, and uniformity of light emitted from the light guide plate 21 toward the liquid crystal panel 10. It is used to increase directivity. The arrangement of the optical sheet 30 is arbitrary, but more and more sheets similar to or different from the diffusion sheet 31 and the prism sheet 32 may be laminated as necessary.

  The front frame 40 is made of metal and has a configuration in which angle portions having an L-shaped cross section are arranged in a frame shape along the outline of the liquid crystal panel 10. The back cover 50 is disposed on the back side of the lamp house 23 so as to cover the lamp house 23. A metal or resin can be used as the material of the back cover 50, and in particular, the strength of the liquid crystal module 1 can be maintained by using a metal. Specifically, stainless steel is used, and stainless steel is preferable in terms of strength and formability.

  The support frame 60 is a base that supports and stores the liquid crystal panel 10, the backlight 20, and the optical sheet 30. The support frame 60 is a frame-like integrated frame. The support frame 60 is complicated in detail because the liquid crystal module 1 is reduced in weight, thickness and frame, and the support frame supports and accommodates a control board (not shown) connected to the liquid crystal panel 10. Because of its shape, it is made by resin molding.

  The linear light source 22, the lamp house 23, and the like are arranged on one long side 61a of the support frame 60. The linear shape is formed on the back side of both short sides 62a and 62b of the support frame 60. In the vicinity of the light source 22, coupling portions 63a, 63b, 63c, and 63d each having two screw holes are provided. In FIG. 3, the coupling portion 63c is not shown because it is hidden in the lamp house 23, but the position of the coupling portion 63c is a position corresponding to a screw 70c described later. Also, corresponding to the positions of the connecting portions 63a, 63b, 63c, and 63d, the lamp house 23 is provided with connecting portions 23a, 23b, 23c, and 23d through which screws are passed, and the back cover 50 is also provided with screws. Coupling portions 50a, 50b, 50c and 50d for penetrating are provided. In FIG. 3, the coupling portion 23 c is not shown because it is shown as an upper body hidden behind the back cover 50, but the position of the coupling portion 23 c is a position corresponding to the coupling portion 50 c of the back lid 50. Then, the lamp house 23 and the back cover 50 are coupled to the support frame 60 by screws 70a, 70b, 70c, and 70d through the coupling portions of the respective members, thereby individually coupling components that are insufficient in strength. Thus, the overall strength of the liquid crystal module 1 is increased, and bending rigidity and impact strength are enhanced.

  As described above, in the current market, liquid crystal modules have been made thinner, lighter, and narrower in frame, and liquid crystal modules used for monitors for laptop computers that are mobile applications The trend is remarkable. When such thinning, lightening, and narrowing the frame are achieved, in the above configuration, the support frame 60 is lightened to the limit, so when the lamp house 23 and the back cover 50 are screwed to the support frame 60, The support frame 60 itself may be twisted by the stress in the direction in which the screw is tightened. Since the support frame 60 serves as a base for storing and supporting the liquid crystal panel 10 and the like when the liquid crystal module 1 is assembled, twisting of the support frame 60 causes ripples in the liquid crystal panel 10 or wrinkles in the optical sheet 30. It becomes a direct cause.

  Therefore, in the present invention, the screws 70a, 70b, 70c, and 70d are usually the same, or the screws having slightly different lengths are used, and the same tightening direction is used. However, the screws 70a and 70c are right screws that are tightened by turning clockwise, and the screws 70b and 70d are left screws that are tightened by rotating counterclockwise.

  That is, by using two types of screws with different tightening directions, for example, the twist of the support frame 60 due to the stress applied to the support frame 60 by turning the right screw, and the opposite direction to the support frame 60 by turning the left screw. It is possible to cancel the twist of the support frame 60 by applying stress, and as a result, to prevent display defects such as ripples of the liquid crystal panel 10 and wrinkles of the optical sheet 30. We focused on being able to do it.

  By the way, the use of two types of screws with different tightening directions naturally means that parts (screws) cannot be shared, and the two types of screws must be distinguished during assembly, resulting in poor assembly. In general, such an idea is not reached. However, in the present invention, the novel aspect of using two types of screws with different tightening directions can be used to compensate for the above-described negative aspect of canceling the twist of the support frame 60. It was possible to produce a remarkable effect.

  In this embodiment, the screws 70a and 70c are right screws and the screws 70b and 70d are left screws. However, for example, the screws 70a and 70b are right screws and the screws 70c and 70d are left screws. It is only necessary to use a coupling means that cancels stress applied to the support frame 60 when a member is coupled to the support frame 60. As the coupling means for canceling the stress applied to the support frame 60, the right screw and the left screw having different tightening directions have been described, but other couplings using elastic force may be considered. A screw is preferable from the surface.

  Further, not only when the members are fixed to the support frame 60 but also when the support frame 60 is composed of, for example, four members corresponding to four sides, the members constituting the support frame 60 are coupled to each other. In doing so, twisting of the support frame 60 can be prevented by using right and left screws at the joint.

  Further, it is more effective to use the coupling means for canceling the stress applied to the support frame 60 near the end of each side, that is, near the corner of the support frame 60 than near the center of each side of the support frame 60. It is. This is because the stress affecting the support frame 60 is small near the center of each side of the support frame 60, whereas the stress affecting the support frame 60 is large near the end of each side of the support frame 60. Therefore, in this embodiment, the coupling portions 64a and 64b provided in the vicinity of the center of the support frame 60 on the short side 62a side are for fixing a gate substrate (not shown) electrically connected to the liquid crystal panel 10. However, it is fixed using only the right screw. On the other hand, a coupling portion 65a in the vicinity of the end portion on the short side 62a side of the support frame 60 and a coupling portion 65b in the vicinity of the short side of the short side 62b are control boards (not shown) for driving the liquid crystal panel 1. Is fixed using only the right-hand screw, but when the control board is fixed to the support frame 60 and the support frame 60 is twisted, the right side is, for example, 65a. By fixing the screw 65b with a left screw, the stress applied by fixing the control board to the support frame 60 may be offset.

  A lead wire 22 b extending from both ends of the linear light source 22 via the lamp holder 22 a is disposed between the lamp house 23 and the long side 61 a of the support frame 60 along the linear light source 22. Then, it is guided to the outside of the liquid crystal module 1 through an opening provided in the back cover 50. In addition, on the short sides 62 a and 62 b side of the support frame 60, a partial protrusion 67 is provided inside the support frame 60, and the light guide plate 21, the reflection plate 24 and the like are supported from the back side of the liquid crystal module 1 by the protrusion 67. ing.

It is the top view which observed the liquid crystal module of the present invention from the back side. It is sectional drawing of the AA part of FIG. It is a principal part disassembled perspective view of the liquid crystal module of this invention.

Explanation of symbols

1 Liquid Crystal Module 10 Liquid Crystal Panel 20 Backlight 23 Lamp House
30 Optical sheet 50 Back cover 60 Support frame 63a, 63b, 63c, 63d Joint part 70a, 70b Right screw 70c, 70d Left screw

Claims (7)

In a liquid crystal module comprising a liquid crystal panel, a backlight, and a frame-shaped support frame that houses and supports the liquid crystal panel and the backlight,
The frame-shaped support frame has a member coupled to the frame-shaped support frame, and the member is coupled to the frame-shaped support frame by a coupling means that cancels stress applied to the frame support frame. LCD module characterized by In a liquid crystal module comprising a liquid crystal panel, a backlight, and a frame-shaped support frame that houses and supports the liquid crystal panel and the backlight,
2. The liquid crystal module according to claim 1, wherein the frame-shaped support frame is constituted by coupling a plurality of members to each other, and the members are coupled by a coupling means that cancels stress applied to each other.   The backlight includes a linear light source, a light guide plate, and a lamp house, and a member coupled to the frame-shaped support frame is a lamp house constituting the backlight. The liquid crystal module according to 1.   The backlight includes a linear light source, a light guide plate, and a lamp house, and a member coupled to the frame-shaped support frame is a back cover that covers the lamp house from the back side. The liquid crystal module according to claim 1 or 3.   5. The liquid crystal module according to claim 1, wherein the coupling means includes a right screw that is tightened by turning to the right and a left screw that is tightened by turning to the left.   The liquid crystal module according to claim 1, wherein the coupling unit is formed near a corner of the frame-shaped support frame. The liquid crystal module according to claim 1, wherein an optical sheet is disposed between the liquid crystal panel and the backlight.

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