JP2007263999A - Liquid crystal display device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a liquid crystal display device wherein an excessive pressure to a liquid crystal cell is not applied by preventing a rise from a casing (frame body) of a liquid crystal cell in a part to which a flexible substrate is fixed. <P>SOLUTION: The liquid crystal display device includes a liquid crystal cell 2, a frame body 4 disposed on the rear side of the liquid crystal cell 2, a flexible substrate 7 having one end fixed to an edge part of the liquid crystal cell 2 and having the other end disposed on the rear side of the one end, and a frame 35 which covers end parts of the liquid crystal cell 2 and side parts of the flexible substrate 7 and is fixed to the frame body 4. The frame 35 is provided with a projection 35a projecting to the rear side of the liquid crystal cell 2, and the flexible substrate 7 is formed into a shape substantially following the projection 35a. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a liquid crystal display device.

Conventionally, this kind of apparatus is shown by patent document 1, for example. In Patent Document 1, a liquid crystal cell 25 is fixed on a flat portion formed inside a casing 24 via an adhesive (see FIG. 2). The flexible substrate 38, one end of which is fixed to the edge of the liquid crystal cell 25, is located in the vicinity of the side surface of the casing 24 and the other end is fixed to the bottom of the casing 24 (see FIGS. 1 and 2). .
JP 2003-121840 A

The above apparatus has a first drawback that the adhesive is detached and easily floats on one side of the liquid crystal cell 25 to which the flexible substrate 38 is fixed. As a result of investigation of the cause by the present inventor, an upward restoring force is applied to the vicinity of one end of the flexible substrate 38 to return to the original state. Therefore, it has been found that one side of the liquid crystal cell 25 is likely to float.

In order to eliminate this drawback, the present inventor provided a frame for pressing one end of the flexible substrate 38 and the end of the liquid crystal cell 25 downward. In order to strongly press one end of the flexible substrate 38, the end of the liquid crystal cell 25 must also be pressed strongly. Therefore, the liquid crystal cell 2
5 is stressed, and the gap for liquid crystal in the liquid crystal cell 25 becomes non-uniform, resulting in an inaccurate display.

In view of this, the present invention takes into consideration the above-mentioned conventional drawbacks, prevents the liquid crystal cell of the portion to which the flexible substrate is fixed from floating from the casing (frame), and does not apply excessive pressure to the liquid crystal cell. I will provide a.

In order to solve the above problems, in the present invention of claim 1, the liquid crystal cell, the frame disposed on the back side thereof, one end is fixed to the edge of the liquid crystal cell, and the other end is the first end. Covering the flexible substrate disposed on the rear side of the liquid crystal cell, the end of the liquid crystal cell and the side of the flexible substrate,
And a frame that is fixed to the frame, and a protrusion that protrudes toward the back side of the liquid crystal cell is provided on the frame, and the flexible substrate is formed in a shape substantially along the protrusion.

In the present invention of claim 2, the protrusion is provided separately from the frame, or the protrusion and the frame are integrally formed.

According to a third aspect of the present invention, the protrusion is formed to be long so as to be positioned in parallel to the edge of the liquid crystal cell.

According to a fourth aspect of the present invention, the protruding portion is provided between an end surface of the liquid crystal cell and a side portion of the flexible substrate.

In this invention of Claim 5, the said flexible substrate was formed in V shape substantially by the press of the said protrusion part.

In this invention of Claim 6, the said frame has a some mounting part, a 1st adhesive material is arrange | positioned at the said mounting part of the side by which the said flexible substrate is arrange | positioned, and the edge vicinity of an optical sheet is the said vicinity. The liquid crystal cell was fixed on the first adhesive material and disposed near the end of the optical sheet via a spacer.

In this invention of Claim 7, the 2nd adhesive material is formed in the bottom face of the said spacer, and the edge vicinity of the said optical sheet and the said spacer are being fixed through the said 2nd adhesive material.

As in the first aspect, the projecting portion projecting to the back side of the liquid crystal cell is provided on the frame, and the flexible substrate is formed in a shape substantially along the projecting portion. As a result, since the downward force is applied to the flexible substrate, the upward restoring force is lost. Therefore, it is possible to prevent the portion of the liquid crystal cell to which the flexible substrate is fixed from floating from the frame.

As in the second aspect, the protrusion is provided separately from the frame, or the protrusion and the frame are formed integrally. With this configuration, the protruding portion can be manufactured at a low cost.

As described in claim 3, the protruding portion is formed to be long so as to be positioned in parallel to the edge of the liquid crystal cell. As a result, since the protruding portion protrudes in the entire width direction of the flexible substrate, an upward restoring force does not occur as in the conventional case.

According to a fourth aspect of the present invention, the protruding portion is provided between the end surface of the liquid crystal cell and the side portion of the flexible substrate. By providing the protrusion at this position, a downward force is reliably applied to the flexible substrate.

As in claim 5, the flexible substrate is substantially formed in a V shape by pressing the protruding portion. As a result, upward restoring force does not occur more reliably in the flexible substrate.

As in claim 6, the frame has a plurality of placement portions, the first adhesive material is placed on the placement portion on the side where the flexible substrate is placed, and the vicinity of the end of the optical sheet is on the first adhesive material The liquid crystal cell was disposed on the vicinity of the end of the optical sheet via a spacer. As a result, since the spacer serves as a buffer material, it is possible to prevent an excessive pressure from being applied to the liquid crystal cell.

As in claim 7, a second adhesive material is formed on the bottom surface of the spacer,
The vicinity of the end of the optical sheet and the spacer are fixed. As a result, the spacer is securely fixed.

Hereinafter, the best mode for carrying out the present invention will be described in detail with reference to examples and drawings. The following embodiments exemplify an example of a liquid crystal display device for embodying the technical idea of the present invention. The present invention can be equally applied to various modifications without departing from the technical idea shown in the claims.

FIG. 1 is an exploded perspective view of a liquid crystal display device 1 according to an embodiment of the present invention. FIG. 2 is a front view of the liquid crystal display device 1 (assembled product). 3, 4, 5, and 6 are respectively AA cross-sectional views of FIG.
They are -B sectional drawing, CC sectional drawing, and DD sectional drawing.

In these drawings, the liquid crystal display device 1 includes a liquid crystal cell 2, an illuminating means 3, a frame 4 that supports the liquid crystal cell 2 and the illuminating means 3, and the like.

In the liquid crystal cell 2, a pair of glass substrates 5 and 6 are bonded together by a sealing material (not shown) applied along the vicinity of the outer peripheral edge of these substrates 5 and 6, and the liquid crystal is put in the inside. It is enclosed.

Furthermore, a flexible substrate 7 on which electrical components (not shown) are mounted is attached to a plurality of terminals (not shown) on one glass substrate 6 (see FIG. 5).

The illumination means 3 is disposed on the back side of the liquid crystal cell 2 (on the side opposite to the display surface), and the light guide plate 9, the reflection plate 10, the reflector 11, the holders 12 and 12 </ b> A, and the light sources 13 and 14. When,
It consists of a reinforcing plate 15 and a buffer 16 (see FIG. 3).

The light guide plate 9 is made of, for example, acrylic resin, and is rectangular when viewed from a plane. When viewed in cross section, the light guide plate 9 is formed such that the side surface 9a of the light guide plate 9 is thick (see FIG. 3) and the other side surface 9b of the light guide plate 9 is thin (see FIG. 4). The light guide plate 9 is formed in a wedge shape. That is,
The top surface of the light guide plate 9 is formed horizontally, and the bottom surface is inclined.

The reflecting plate 10 is made of a reflecting material and is disposed in contact with the bottom surface of the light guide plate 9. Reflector 1
The left end of 0 protrudes slightly to the left of the side surface 9a of the light guide plate 9 (see FIG. 3). The right end of the reflection plate 10 is slightly shifted to the left side from the other side surface 9b of the light guide plate 9 (see FIG. 4).

The reflector 11 is made of, for example, aluminum, and is substantially formed in an inverted U shape when viewed in cross section. The reflector 11 has an elongated shape when viewed from a plane (see FIG. 1).

The reflector 11 has an upper surface 11a, a side surface 11b, and a bottom surface 11c. The reflector 11 has notches 11d and 11e formed at two locations near the left end and near the right end (see FIG. 1). The notches 11d and 11e are both a part of the top surface 11a and one of the bottom surface 11c.
It is a part that is notched.

The holder 12 is made of, for example, silicon rubber, and when viewed in cross section, the holes for the light sources 13 and 14 are formed, and the outer shape is formed with an oval part 12a (see FIG. 3).

In the holder 12, an outlet portion (not shown) is formed so as to be connected to the oval portion 12a. The exit portion is formed in a substantially rectangular tube shape, and the internal passage is connected to the hole for the light source 13 and the hole for the light source 14. Lead wires 17 and 18 are arranged in the holder 12. Holder 12A
Is formed symmetrically with respect to the holder 12 (see FIG. 1).

Thus, one notch 11 d is formed at a position near the holder 12. The other notch 11e is formed at a position near the holder 12A.

Both of the light sources 13 and 14 are linear light sources composed of cold cathode tubes or the like. The left end of the light source 13 is inserted and fixed in the hole of the holder 12. The right end is inserted and fixed in the hole of the holder 12A.

The left end of the light source 14 is inserted and fixed in the hole of the holder 12. The right end is inserted and fixed in the hole of the holder 12A.

In the vicinity of the right end of the lead wire 18, the conducting wire from which the coating has been removed is connected to the left electrode of the light source 13 by solder or the like. In the vicinity of the right end of the lead wire 17, the conducting wire from which the coating has been removed is connected to the left electrode of the light source 14 by solder or the like.

In the vicinity of the right end of the lead wire 19, the conducting wire from which the coating has been removed is connected to the right electrode of the light source 13 by solder or the like. In the vicinity of the right end of the lead wire 20, the conducting wire from which the coating has been removed is connected to the right electrode of the light source 14 by solder or the like (see FIG. 3).

The left end of the lead wire 18 and the left end of the lead wire 19 are connected to the connector 22. The left end of the lead wire 17 and the left end of the lead wire 20 are connected to the connector 23.

In this way, the reflector 11 covers the light sources 13 and 14 supported by the holders 12 and 12A so that the light sources 13 and 14 face the side surface 9a of the light guide plate 9, and the light guide plate 9 and the reflection plate 10 are covered.
It is provided so as to cover the vicinity of each end.

The reinforcing plates 15 and 15A are both made of a metal plate, and are both substantially U-shaped when viewed in cross section (see FIGS. 1 and 3).

The reinforcing plate 15 is accommodated in the notch 11d so as to cover the holder 12. Reinforcing plate 15A
Is accommodated in the notch 11e so as to cover the holder 12A.

The bottom plate 24 is made of, for example, a metal plate or the like, and has a substantially inverted L shape when viewed in cross section (see FIG. 3). The bottom plate 24 has an elongated shape when viewed from a plane (see FIG. 1).

The bottom plate 24 has an upper surface 24a, a side surface 24b, and a bottom surface 24c. The side surface 24 b of the bottom plate 24 is disposed in contact with the side surface 11 b of the reflector 11.

The reinforcing plate 15 is disposed in contact with or in close proximity (for example, a gap of 0.1 to 0.3 mm) between the inner surface of the side surface 24b formed on the bottom plate 24 and the inner surface of the notch portion 11d. Yes.

The reinforcing plate 15A is disposed so as to abut or approach (for example, a gap of 0.1 to 0.3 mm) between the inner surface of the side surface 24b formed on the bottom plate 24 and the inner surface of the notch portion 11e. Yes.

The buffer bodies 16 and 16A are made of, for example, a relatively hard elastic body such as PET resin, and an adhesive is provided on the back surface. The width of the buffer bodies 16 and 16A (the length in the longitudinal direction of the side surface 9a of the light guide plate 9) is about 4 mm.

As described above, the reinforcing plate 15 is disposed between the side surface 9 a of the light guide plate 9 and the holder 12. The reinforcing plate 15A is disposed between the side surface 9a of the light guide plate 9 and the holder 12A.

The buffer body 16 is fixed to the side surface of the reinforcing plate 15 and is disposed in contact with or close to the side surface 9a of the light guide plate 9 (for example, the gap is 0.1 to 0.3 mm). The buffer body 16A is formed of the reinforcing plate 1
5A is fixed to the side surface of the light guide plate 9 and abuts on or close to the side surface 9a of the light guide plate 9 (for example, the gap is 0.1
˜0.3 mm).

The light guide plate 9, the reflection plate 10, the reflector 11, the holders 12 and 12A, the light sources 13 and 14, the reinforcing plates 15 and 15A, the buffer bodies 16 and 16A, and the lead wires 17, 18, and 1
The illumination means 3 is composed of 9, 20, connectors 22, 23, a bottom plate 24, and the like.

The frame body 4 is formed with a protruding region 25 that covers the reflector 11. Adhered adhesive materials 26 are respectively provided on the outer surface of the reflector 11 and the inner surface of the protruding region 25 (see FIG. 3).

Another optical sheet, for example, a prism sheet 27 is disposed on the light guide plate 9. An optical sheet, for example, a diffusion sheet 28 is disposed above the other optical sheet 27. A radiator plate 29 is disposed on the bottom surface of the bottom surface 11c of the reflector 11 (see FIG. 3). In addition,
The length of the bottom surface 11c formed in the reflector 11 (length extending in the left-right direction in FIG. 3) is about 10 mm.

The frame body 4 is made of, for example, plastic, is formed in a frame shape, and an opening 30 is formed in the center. On three sides of the frame body 4, a side portion 31 b (see FIG. 4) extending in the vertical direction and the side portion 3.
1c (refer FIG. 5) and the side part 31d (refer FIG. 6) are formed.

On the three sides of the frame 4, lower placement portions 32 b, 32 c, and 32 d that are connected to the side portions 31 b, 31 c, and 31 d and are located around the opening portion 30 are formed.

The support 33 has a substantially crank-shaped cross section (see FIG. 4), and has a long and narrow shape when viewed from a plane (see FIG. 1). The collar part formed in the lower part of the support body 33 is engaged with the collar part of the side part 31b formed in the frame 4 (refer FIG. 4).

On the side of the frame 4, a placement portion 34 a is formed on the upper portion of the frame 4 (see FIG. 3).
A placement portion 34b is formed on the support 33 (see FIG. 4). A mounting portion 34c is formed on the upper portion of the frame body 4 (see FIG. 5). A placement portion 34d is formed on the upper portion of the frame body 4 (see FIG. 6).

The frame 35 is made of, for example, a metal plate or the like, and an opening 36 is formed at the center and is formed in a frame shape.

The upper part of the frame 35 is in contact with the upper surface 37a of the frame body 4, and the side part of the frame 35 is the bottom plate 2
4 is in contact with and fixed to the side surface 24b (see FIG. 3).

  The upper part of the frame 35 is in contact with the upper surface 37b of the frame body 4 (see FIG. 4).

The upper part 35b and the side part 35c constituting the frame 35 cover the liquid crystal cell 2, the frame body 4 and the like (see FIG. 5).

The upper part of the frame 35 is in contact with the upper surface 37d of the frame body 4, and the side part of the frame 35 is
The side surface 37e is abutted and fixed (see FIG. 6).

The heat radiating plate 29 is made of, for example, aluminum, and has a bottom portion and three bent portions. The heat radiating plate 29 is disposed on the lower mounting portions 32b, 32c, and 32d formed on the frame body 4 (
(See FIGS. 4, 5, and 6).

The reflector 10 is disposed on the bottom of the heat sink 29. The light guide plate 9 is disposed on the reflection plate 10. In this way, the heat radiating plate 29 is exposed through the opening 30 (FIG. 1).
reference).

In the light guide plate 9, there are provided adhesive materials 38 respectively bonded to the back surface in the vicinity of the other side surface 9b, which is located on the opposite side of the side surface 9a facing the light sources 13 and 14, and the surface of the heat radiating plate 29.
(See FIG. 4).

The other optical sheet 27 is disposed on the light guide plate 9. The vicinity of the right end of the other optical sheet 27 is fixed on a mounting portion 34 d formed on the frame body 4 with an adhesive 39. The other spacer 40 is fixed on the vicinity of the right end of the other optical sheet 27 via the adhesive material 40a (see FIG. 6).

The optical sheet 28 is disposed on another optical sheet 27. The vicinity of the left end of the optical sheet 28 is fixed on the mounting portion 34 c formed on the frame body 4 via the first adhesive material 41.
The spacer 42 is fixed on the vicinity of the left end of the optical sheet 28 via the second adhesive material 42a (see FIG. 5).

The AA side of the liquid crystal cell 2 is placed on the placement portion 34a of the frame 4 (see FIG. 3), and the BB side of the liquid crystal cell 2 is placed on the placement portion 34b of the support 33. (See FIG. 4).

The CC side of the liquid crystal cell 2 is placed on the spacer 42 (see FIG. 5), and the D−
The D side is placed on another spacer 40 (see FIG. 6). The liquid crystal display device 1 is configured by the above components.

Below, according to FIG. 1 thru | or FIG. 6, the characteristic of the structure of this liquid crystal display device 1 is put together. As a first feature, the liquid crystal cell 2, the frame 4 disposed on the back side thereof, and one end is fixed to the edge of the liquid crystal cell 2, and the other end is disposed on the rear side of the one end. A substrate 7 is provided.
The other end of the flexible substrate 7 is fixed to, for example, the bottom surface of the bottom portion 4 a formed on the frame body 4.

A frame 35 that covers the end portion of the liquid crystal cell 2 and the side portion 7 a of the flexible substrate 7 and is fixed to the frame body 4 is provided. A projecting portion 35 a projecting to the back side of the liquid crystal cell 2 is a frame 3.
5 is provided. The flexible substrate 7 is formed in a shape substantially along the protruding portion 35a (see FIG. 5).

The flexible substrate 7 has one end and a side portion 7a before the frame 35 is attached.
May be formed in a circular arc shape. By attaching the frame,
The flexible substrate 7 is formed in a shape substantially along the protruding portion 35a.

Alternatively, before the frame 35 is attached, the flexible substrate 7 may be formed in a shape substantially along the protruding portion 35a.

The “projection 35 a projecting toward the back side of the liquid crystal cell 2” indicates that the projection 35 a projects downward with respect to the upper part 35 b formed on the frame 35.

As a second feature, the protrusion 35 a may be provided separately from the frame 35. And the protrusion part 35a and the flame | frame 35 may be fixed by caulking process, welding, etc., for example. The protrusion 35a and the frame 35 may be integrally formed. For example, the frame 35 may be provided with a protruding portion 35a that protrudes downward by a seating process or the like.

As a third feature, the protruding portion 35 a is formed in a long shape so as to be positioned in parallel to the edge of the liquid crystal cell 2.

As a fourth feature, the protruding portion 35a is provided between the end surface 2a of the liquid crystal cell 2 and the side portion 7a of the flexible substrate 7 (see FIG. 5).

As a fifth feature, the flexible substrate 7 is formed substantially in a V shape by pressing the protruding portion 35a (see FIG. 5).

As a sixth feature, the frame 4 has a plurality of placement portions 34b, 34c, and 34d. The first adhesive material 41 is disposed on the placement portion 34c on the side where the flexible substrate 7 is disposed. The vicinity of the end of the optical sheet 28 is fixed on the first adhesive material 41. The liquid crystal cell 2 is disposed near the end of the optical sheet 28 via a spacer 42 (see FIG. 5).

As a seventh feature, a second adhesive material 42 a is formed on the bottom surface of the spacer 42. Near the end of the optical sheet 28 and the spacer 42 are fixed via the second adhesive 42a.

It is a disassembled perspective view of the liquid crystal display device 1 which concerns on the Example of this invention. It is a front view of the liquid crystal display device 1 (assembly product). It is AA sectional drawing of FIG. It is BB sectional drawing of FIG. It is CC sectional drawing of FIG. It is DD sectional drawing of FIG.

Explanation of symbols

2 Liquid crystal cell 4 Frame 7 Flexible substrate 9 Light guide plate 10 Reflector 11 Reflector 12 Holder 13, 14 Light source 34b, 34c, 34d Placement part 35 Frame 35a Projection part

Claims (7)

A liquid crystal cell, a frame disposed on the back side thereof, a flexible substrate in which one end is fixed to an edge of the liquid crystal cell and the other end is disposed on the rear side of the one end, and an end of the liquid crystal cell And a frame that covers the side of the flexible substrate and is fixed to the frame, and a protrusion that protrudes toward the back side of the liquid crystal cell is provided on the frame, and the flexible substrate is substantially formed on the protrusion. A liquid crystal display device characterized in that the liquid crystal display device is formed in a shape along the line. The liquid crystal display device according to claim 1, wherein the protruding portion is provided separately from the frame, or the protruding portion and the frame are integrally formed. 2. The liquid crystal display device according to claim 1, wherein the protruding portion is formed in a long shape so as to be positioned in parallel to the edge of the liquid crystal cell. 2. The liquid crystal display device according to claim 1, wherein the protruding portion is provided between an end face of the liquid crystal cell and a side portion of the flexible substrate. The liquid crystal display device according to claim 1, wherein the flexible substrate is formed substantially in a V shape by pressing the protruding portion. The frame has a plurality of placement portions, the first adhesive material is disposed on the placement portion on the side where the flexible substrate is disposed, and the vicinity of the end of the optical sheet is fixed on the first adhesive material. The liquid crystal cell is disposed near the end of the optical sheet via a spacer.
Liquid crystal display device. 7. The liquid crystal display device according to claim 6, wherein a second adhesive material is formed on the bottom surface of the spacer, and the spacer is fixed to the vicinity of the end of the optical sheet via the second adhesive material. .

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