WO2011158556A1

WO2011158556A1 - Liquid crystal display device and television receiver

Info

Publication number: WO2011158556A1
Application number: PCT/JP2011/059798
Authority: WO
Inventors: 達朗黒田
Original assignee: シャープ株式会社
Priority date: 2010-06-15
Filing date: 2011-04-21
Publication date: 2011-12-22

Abstract

Provided is a liquid crystal display device that makes it possible to use space effectively within a housing. In the present liquid crystal display device, the external dimensions of a first substrate (21) are greater than the external dimensions of a second substrate (22). The second substrate (22) is positioned on a backlight device (30) side, and a liquid crystal panel (20) and the backlight device (30) are integrally held, with the protruding edge parts (21A, 21B) of the peripheral edge parts of the first substrate (21), which protrude beyond the second substrate (22) in directions within the plane of the substrate, being supported by the opening edge part (32B) of the housing (32). In at least one substrate of the first substrate (21) and the second substrate (22), an external connection part (41A), which is connected to an external circuit (53), is formed on the surface of the substrate on the liquid crystal layer (23) side, and the external circuit (53) is disposed within the housing (32).

Description

Liquid crystal display device and television receiver

The present invention relates to a liquid crystal display device and a television receiver.

The liquid crystal display device integrally holds a liquid crystal panel in which a liquid crystal layer is sandwiched between a pair of front and back glass substrates and a backlight device which is an external light source.

Of the pair of front and back glass substrates of the liquid crystal panel, the front glass substrate is a CF substrate provided with a color filter and the like, and the back glass substrate has a switching element and a plurality of wirings on the surface (front surface) on the liquid crystal layer side. Are formed on the array substrate. The outer dimension of the array substrate is set to be slightly larger than that of the CF substrate, and a portion of the surface of the array substrate that is disposed outside the CF substrate is connected to a driving circuit for driving the liquid crystal panel. An external connection is formed.

The backlight device includes a housing that accommodates a light source such as a large number of fluorescent tubes (for example, cold cathode tubes) and that opens to the liquid crystal panel side. It is integrally held by the backlight device in a state of being arranged on the front side of the edge (outside of the casing) (for example, Patent Document 1).

Japanese Patent Laid-Open No. 2007-222068

(Problems to be solved by the invention)
In the configuration as described above, since the external connection portion of the liquid crystal panel is located on the front side of the casing, it is necessary to attach an external circuit to the outside of the casing and connect the external circuit and the external connection portion from the outside. There is a restriction. However, in order to reduce the size of the liquid crystal display device, there has been a demand for effective use of the space in the housing, and improvement has been desired.

The present invention has been completed based on the above-described circumstances, and an object thereof is to provide a liquid crystal display device capable of effectively using a space in a housing.

(Means for solving the problem)
A liquid crystal display device according to the present invention includes a liquid crystal panel in which a liquid crystal layer is sandwiched between a first substrate and a second substrate that are arranged to face each other, and a switching element is provided on the liquid crystal layer side of the second substrate; A liquid crystal display device comprising: a backlight device that houses a light source that irradiates light to the liquid crystal panel and that has a housing that opens toward the liquid crystal panel; and an external circuit that drives the liquid crystal panel The outer dimension of the first substrate is set to be larger than the outer dimension of the second substrate, and the second substrate of the first substrate and the second substrate is disposed on the backlight device side. In addition, a protruding edge portion that protrudes outward in the plate surface direction from the second substrate among the peripheral edge portion of the first substrate is supported by the opening edge portion of the housing, and the liquid crystal panel and the Integrated with backlight device An external connection portion connected to the external circuit is formed on a surface of the substrate on the liquid crystal layer side of at least one of the first substrate and the second substrate, and the external circuit is It is arranged in the housing.

According to such a configuration, with respect to the integral holding of the liquid crystal panel and the backlight device, the protruding edge portion of the first substrate is supported by the opening edge portion of the housing, so that the external circuit is placed in the housing. Even in the case of housing, it is possible to connect the external circuit and the external connection portion disposed on the liquid crystal layer side of the first substrate or the second substrate. Therefore, an external circuit can be accommodated in a housing | casing and the space in a housing | casing can be used effectively.

The external connection portion is one end of a conductor pattern formed on the liquid crystal layer side surface of the first substrate, and the other end of the conductor pattern is connected to a terminal portion provided on the second substrate, A drive signal from the external circuit may be supplied to the switching element.

The other end of the conductor pattern and the terminal portion may be connected by an anisotropic conductive film.
The other end of the conductor pattern and the terminal portion may be connected by a metal bump.
Further, the external connection portion may be formed on the surface of the second substrate on the liquid crystal layer side, and the other end of the flexible substrate having one end connected to the external circuit may be connected to the external connection portion. Good.

The liquid crystal panel has a substantially rectangular shape that is long in one direction, and the outer dimension of the first substrate is set to a dimension that protrudes in one of the longitudinal direction and the short direction of the second substrate. It is good.
The liquid crystal panel may have a substantially rectangular shape that is long in one direction, and an outer dimension of the first substrate may be set to a dimension that protrudes in both the longitudinal direction and the short direction of the second substrate. .

In addition, a positioning portion that protrudes toward the liquid crystal panel is provided at the opening edge of the housing, and is disposed on the protruding edge of the first substrate so as to face the positioning portion. It is good also as that in which the position shift prevention edge which touches was formed. According to such a configuration, it is possible to prevent displacement of the liquid crystal panel.

Further, a sub light source that irradiates light to the protruding edge portion of the first substrate may be housed in the housing. According to such a configuration, various information can be displayed outside the active area.
Moreover, the television receiver of this invention is provided with the said liquid crystal display device.

(The invention's effect)
ADVANTAGE OF THE INVENTION According to this invention, the liquid crystal display device which can use effectively the space in a housing | casing can be provided.

1 is an exploded perspective view showing a schematic configuration of a television receiver according to Embodiment 1. FIG. Exploded perspective view showing schematic configuration of liquid crystal display device Sectional drawing which shows the cross-sectional structure along the short side direction of a liquid crystal display device An enlarged plan view of the array substrate on the LCD panel Schematic plan view showing a configuration in which the liquid crystal panel is supported by the opening edge of the housing Partial expanded sectional view which shows the structure of the connection of the external connection part of a liquid crystal panel, and a driver board | substrate FIG. 6 is a schematic plan view showing a configuration of a liquid crystal display device according to Embodiment 2 in which a liquid crystal panel is supported by an opening edge portion of a housing. It is a liquid crystal display device concerning other embodiment (1), Comprising: The schematic plan view which shows the structure by which the liquid crystal panel was supported by the opening edge part of the housing | casing It is a liquid crystal display device concerning other embodiment (2), Comprising: The schematic plan view which shows the structure by which the liquid crystal panel was supported by the opening edge part of the housing | casing Sectional drawing which shows the cross-sectional structure along the short side direction of the liquid crystal display device concerning other embodiment (4).

<Embodiment 1>
A first embodiment of the present invention will be described with reference to FIGS. In the present embodiment, a television receiver TV including the liquid crystal display device 10 is illustrated.
As shown in FIG. 1, the television receiver TV according to the present embodiment includes a liquid crystal display device 10, front and back cabinets Ca and Cb that are accommodated so as to sandwich the liquid crystal display device 10, a power source P, and television broadcasting. A tuner T for receiving and a stand S are provided. Hereinafter, in each component, the lower left side (front side of the television receiver TV, the display side) in FIG. 1 will be described as the front side, the upper right side as the back side, the upper side as the upper side, and the lower side as the lower side.

As shown in FIG. 2, the liquid crystal display device 10 includes a liquid crystal panel 20 and a backlight device 30 that is an external light source, and these are integrally held by a bezel 60 or the like. In the present embodiment, the liquid crystal display device 10 has a horizontally long rectangular shape as a whole, and is used in a vertically placed state, that is, the panel surface 20A (display surface) of the liquid crystal panel 20 is substantially parallel to the vertical direction.

The backlight device 30 is a so-called direct-type backlight device 30, and a light source (here, a cold cathode tube 31 is used as a high-pressure discharge tube) at a position directly below the back surface of the panel surface 20A of the liquid crystal panel 20. It is the structure which comprised multiple.
The backlight device 30 includes a substantially box-shaped housing 32 having an opening on the liquid crystal panel 20 side (front side), and an optical member 33 attached so as to cover the opening of the housing 32.

The casing 32 includes a chassis 32A having a shallow substantially box shape and a frame 32B having a frame shape installed on the front side of the chassis 32A.
The chassis 32A is made of metal sheet metal, and has a rectangular bottom plate 34 and a side plate 35 rising from the long side to the front side. The side plates 35 provided on the upper and lower sides of the chassis 32A are formed so as to be inclined outward from the bottom plate 34 (inclinations in directions away from the bottom plate 34 toward the front side) (see FIG. 3).

In the chassis 32A, there are a cold cathode tube 31, a lamp clip 36 for attaching the cold cathode tube 31 to the chassis 32A, a lamp holder 37 that supports the end of the cold cathode tube 31, and an end of the cold cathode tube 31 group. And a holder 38 that collectively covers the lamp holder 37 (see FIG. 2).

The cold-cathode tube 31 has an elongated tubular shape, and is accommodated in the chassis 32A in a state in which the length direction (axial direction) thereof coincides with the longitudinal direction of the chassis 32A and a large number of them are arranged in parallel with each other. Has been. The cold cathode tube 31 is gripped by a white synthetic resin lamp clip 36 so that a slight gap is provided between the cold cathode tube 31 and the chassis 32A. The bottom plate 34 of the chassis 32A is substantially parallel to the liquid crystal panel 20.

A reflection sheet 39 is disposed on the inner surface side of the bottom plate 34 of the chassis 32A (the side opposite to the light emitting side of the cold cathode tube 31). The reflection sheet 39 is made of synthetic resin, and the surface thereof is white with excellent light reflectivity. The reflection sheet 39 is laid and integrated so as to cover almost the entire area along the inner surface of the chassis 32A, and constitutes a wall surface (light reflection surface) of the chassis 32A.

The holder 38 is made of a white synthetic resin and has a long and narrow box shape extending along the short direction of the chassis 32A. The holder 38 has a stepped surface on which the optical member 33 can be placed.

The optical member 33 includes a diffusion plate 33A and an optical sheet 33B disposed on the front side of the diffusion plate 33A. The diffusion plate 33A is formed by dispersing and scattering light scattering particles in a synthetic resin plate-like member, and has a function of diffusing linear light emitted from the cold cathode tube 31 serving as a linear light source. The short side edge of the diffusion plate 33A is placed on the stepped surface of the holder 38 as described above, and the long side edge is placed on the claw pieces 61 formed at a plurality of locations on the side plate 35 of the chassis 32A. (See FIG. 3).

The optical sheet 33B is a laminate of a diffusion sheet, a lens sheet, and a reflective polarizing plate, and has a function of converting light emitted from the cold cathode tube 31 and passing through the diffusion plate 33A into planar light. Yes.

A metal frame 32B for holding the optical member 33 on the chassis 32A is installed on the surface side of the optical member 33 (the surface side of the peripheral portion of the optical sheet 33B). The frame 32B has a substantially square frame shape along the peripheral edge of the optical member 33 (see FIG. 2). The periphery of the diffusion plate 33A and the optical sheet 33B is held between the frame 32B and the holder 38, or the frame 32B and the claw piece 61 of the chassis 32A, and is held by the backlight device 30.

As shown in FIG. 3, the liquid crystal panel 20 is sealed between a pair of transparent (translucent)

glass substrates

21 and 22 having a horizontally long rectangular shape, and both

substrates

21 and 22. And a liquid crystal layer 23 whose optical characteristics change accordingly. The two

substrates

21 and 22 face each other and are bonded together with a predetermined gap (interval) therebetween, and the liquid crystal layer 23 sandwiched between the gaps is surrounded by a sealant 24 and is liquid-tight. State is maintained. Note that

polarizing plates

42A and 42B are disposed on the outer surface sides of the substrates 21 and 22 (on the side opposite to the liquid crystal layer 23), respectively.

Both

substrates

21 and 22 have a front side (front side) as a CF substrate 21 (first substrate) and a back side (back side) as an array substrate 22 (second substrate).

As shown in FIG. 4, a large number of TFTs 25 and pixel electrodes 26 serving as switching elements are provided side by side on the surface side of the array substrate 22 (the liquid crystal layer 23 side and the surface facing the CF substrate 21). Around the TFT 25 and the pixel electrode 26, a gate wiring 27 and a source wiring 28 are arranged in a lattice shape. The pixel electrode 26 is connected to the drain electrode of the TFT 25, the source wiring 28 is connected to the source electrode of the TFT 25, and the gate wiring 27 is connected to the gate electrode of the TFT 25. The pixel electrode 26 is made of a transparent electrode such as ITO (Indium Tin Oxide) or ZnO (Zinc Oxide). Of the array substrate 22, a portion where the pixel electrode 26 is disposed is a display region (active region), and an outer peripheral portion (frame portion) outside thereof is a non-display region.

A terminal portion 29 for supplying signals to the

wirings

27 and 28 is formed in a portion (lower side portion) along the lower side of the outer peripheral portion of the array substrate 22. The terminal portion 29 is formed in a region on the lower side of the array substrate 22 and below the sealant 24 (outside the sealant 24 in the plate surface direction of the array substrate 22).

The CF substrate 21 is provided with a counter electrode (not shown) facing the pixel electrode 26 on the array substrate 22 side and a color filter (not shown). The color filter is configured such that colored portions of R (red), G (green), and B (blue) are alternately arranged at positions corresponding to each pixel.

The outer dimension of the CF substrate 21 is set larger than the outer dimension of the array substrate 22. Specifically, the outer dimension of the CF substrate 21 is set to a dimension protruding in the short direction of the array substrate 22 (Y-axis direction in FIG. 3). In other words, the short dimension of the CF substrate 21 is set to the array substrate 22. It is set to be larger than the dimension in the short direction. The CF substrate 21 has an upper edge portion 21A along the upper long side and a lower edge portion 21B along the lower long side of the peripheral edge portion above the peripheral edge of the array substrate 22 (right side in FIG. 3). ) And a lower side (left side of the same) in a positional relationship. That is, the upper edge portion 21A and the lower edge portion 21B are configured as protruding edge portions.

A conductor pattern 41 is formed on the back surface (surface on the liquid crystal layer 23 side) of the lower edge portion 21B of the CF substrate 21 (see FIGS. 3 and 6). One end side of the conductor pattern 41 is formed on the back surface of the lower edge portion 21B. Specifically, the upper portion (in the plate surface direction) of the back surface of the lower edge portion 21B excluding the portion placed on the frame 32B described later. It is formed in a portion near the center and a portion near the end of the array substrate 22. One end side of the conductor pattern 41 is exposed to the back side without being covered by the array substrate 22, and serves as an external connection portion 41 A that is connected to a flexible substrate 50 described later. On the other hand, the other end side of the conductor pattern 41 is formed in a portion of the back surface of the CF substrate 21 facing the array substrate 22. The other end side of the conductor pattern 41 is disposed opposite to the terminal portion 29 of the array substrate 22 in the region outside the sealant 24 (left side in FIG. 6), and an internal connection portion 41B connected to the terminal portion 29. Has been. The internal connection portion 41 B and the terminal portion 29 are connected via an anisotropic conductive film (ACF; Anisotropic Conductive Film) 51.

The liquid crystal panel 20 is held integrally with the backlight device 30 by arranging the array substrate 22 on the back side (backlight device 30 side) and sandwiching the peripheral edge between the metal bezel 60 and the frame 32B. Yes. Specifically, the upper edge portion 21A and the lower edge portion 21B of the CF substrate 21 are placed on the front side of the frame 32B (opening edge portion of the housing 32), and the bezel is placed on the front side of the upper edge portion 21A and the lower edge portion 21B. 60 is mounted, and the bezel 60 is integrated by being fixed to the frame 32B and the chassis 32A (see FIG. 3).

When the liquid crystal panel 20 is held by the backlight device 30, the entire array substrate 22 is housed in the housing 32. Further, a part of the upper edge portion 21A and a part of the lower edge portion 21B of the CF substrate 21 are located inside the frame 32B (side surrounded by the frame 32B) and exposed to the back side (inside the housing 32). It becomes a state. As a result, the external connection portion 41 A provided on the CF substrate 21 is exposed to the inside of the housing 32 (facing the housing 32).

One end of a flexible flexible substrate 50 is connected to the external connection portion 41A of the liquid crystal panel 20. A plurality of flexible substrates 50 (10 in the present embodiment) are arranged side by side at a predetermined interval on the lower side in the vertical direction when used in the liquid crystal panel 20. The flexible substrate 50 is configured such that a conductive pattern is printed on a thin film and a driver such as an LSI chip is mounted. In addition, as the flexible substrate 50, what is called SOF (System On Film) or TCP (Tape Carrier Package) is used.

A driver substrate 53 (a driver board 53) that transmits a drive signal for driving the liquid crystal panel 20 is connected to the end of the flexible substrate 50 opposite to the end connected to the external connection portion 41A of the liquid crystal panel 20. Source substrate, drive substrate) are connected. The driver substrate 53 transmits a drive signal (a source signal and a gate signal) based on a control signal supplied from a control substrate 54 described later, and the drive signal is transmitted to each wiring 27 of the liquid crystal panel 20 via the flexible substrate 50. 28 can be supplied.

The driver substrate 53 has a long and narrow rectangular plate shape. On the synthetic resin substrate, electronic parts such as capacitors and resistors are mounted and a conductive pattern is printed. The flexible substrate 50 is formed at the end of the conductive pattern. The ends of are connected.

The driver board 53 is housed inside the housing 32. Specifically, the driver board 53 is housed inside the chassis 32A, and is attached in a posture in which the plate surface is substantially parallel to the plate surface of the side plate 35 of the chassis 32A.

The end of the driver board 53 opposite to the side to which the flexible board 50 is connected is connected to a control board 54 provided outside the chassis 32A (the back side of the bottom plate 34). In the driver board 53 and the control board 54, for example, a connector connecting portion (not shown) provided on the driver board 53 protrudes outside the chassis 32A from the opening 34A formed in the bottom plate 34 and the reflection sheet 39 of the chassis 32A. The electrical connection is established by being inserted into the connector 56 provided on the control board 54.

According to the present embodiment configured as described above, the following effects can be obtained.
In the liquid crystal display device 10 according to the present embodiment, a liquid crystal layer 23 is sandwiched between a CF substrate 21 and an array substrate 22 which are arranged to face each other, and a switching element is provided on the liquid crystal layer 23 side of the array substrate 22. Backlight device 30 having panel 20, housing cold cathode tube 31 that irradiates light to liquid crystal panel 20, and housing 32 that opens to liquid crystal panel 20 side, and driver substrate for driving liquid crystal panel 20 53, the outer dimension of the CF substrate 21 is set larger than the outer dimension of the array substrate 22, the array substrate 22 is disposed on the backlight device 30 side, and the CF substrate 21 Of the peripheral edge of the substrate 21, the upper edge portion 21 A and the lower edge portion 21 B protruding outward in the plate surface direction from the array substrate 22 are frame 32 B (opening edge portion of the housing 32. The liquid crystal panel 20 and the backlight device 30 are integrally held in a state where the external connection portion 41A is connected to the driver substrate 53 on the surface of the CF substrate 21 on the liquid crystal layer 23 side. The driver board 53 is arranged in the chassis 32A (in the housing 32).

Thus, regarding the integral holding of the liquid crystal panel 20 and the backlight device 30, the upper edge portion 21A and the lower edge portion 21B of the CF substrate 21 are supported by the frame 32B. Even in the case of being housed, the driver board 53 and the external connection part 41A arranged on the liquid crystal layer 23 side of the CF board 21 can be connected. Therefore, the driver board 53 can be accommodated in the chassis 32A, and the space in the housing 32 can be used effectively.

<Embodiment 2>
Next, a television receiver TV according to Embodiment 2 embodying the present invention will be described with reference to FIG.
In the television receiver TV of the present embodiment, the external dimensions of the CF substrate 70 are set to dimensions that protrude in both the longitudinal direction and the short direction of the array substrate 22, and in addition to this, the liquid crystal panel 20 is mounted on the frame 32B. A positioning portion 71 that protrudes toward the side is provided, and is disposed on the protruding edge portion (upper edge portion 70A, lower edge portion 70B, left edge portion 70C, right edge portion 70D) of the CF substrate 70 so as to face the positioning portion 71. This is different from the first embodiment in that a position shift prevention edge 73 is formed. In addition, the same code | symbol is attached | subjected to the structure similar to Embodiment 1, and the overlapping description is abbreviate | omitted.

As in the first embodiment, the television receiver TV according to the present embodiment includes the liquid crystal display device 10, the front and back cabinets Ca and Cb that are accommodated so as to sandwich the liquid crystal display device 10, the power source P, the television broadcast, and the like. A tuner T for receiving and a stand S are provided, and the liquid crystal display device 10 is provided with a liquid crystal panel 20 and a backlight device 30.

The outer dimensions of the CF substrate 70 are set to be larger than the outer dimensions of the array substrate 22 as in the first embodiment. Specifically, the outer dimension of the CF substrate 70 is set to a dimension that protrudes in both the longitudinal direction and the short direction of the array substrate 22, in other words, the dimension that the CF substrate 70 is slightly larger than the array substrate 22. . The CF substrate 70 has an upper edge 70A along the upper long side, a lower edge 70B along the lower long side, and a short side on the left side toward the panel surface 20A of the liquid crystal panel 20 among the peripheral edges. The left edge portion 70C along the right side and the right edge portion 70D along the short side on the right side are attached to the array substrate 22 in such a positional relationship that they protrude upward, downward, leftward and rightward from the peripheral edge of the array substrate 22, respectively. It has been.

The frame 32B on which the upper edge portion 70A, the lower edge portion 70B, the left edge portion 70C, and the right edge portion 70D of the CF substrate 70 are placed is provided with a positioning portion 71 that protrudes toward the front side. The positioning portions 71 are provided at four locations, one at each of the four corners of the frame 32B. The positioning portion 71 may be provided by any means as long as it projects from the surface of the frame 32B to the front side. For example, the positioning portion 71 is fastened so that the front end side projects from the back side of the frame 32B toward the front side. It is good to provide with appropriate means, such as a bolt.

The CF substrate 70 is provided with a misalignment prevention edge 73 that is disposed to face the positioning portion 71 and is in contact with the positioning portion 71. The misalignment prevention edge 73 is formed at all four corners of the CF substrate 70, specifically, the corner where the upper edge 70A and the left edge 70C intersect, and the upper edge 70A and the right edge 70D intersect. Are formed at the corner where the lower edge 70B and the left edge 70C intersect, and at the corner where the lower edge 70B and the right edge 70D intersect. The misalignment prevention edge 73 formed at each corner has a substantially L-shape formed by two edges that intersect at a substantially right angle. Note that the misalignment prevention edges 73 provided at the four locations are formed in substantially the same shape and size.

As in the first embodiment, the liquid crystal panel 20 includes the CF substrate 70 and the array substrate 22 in which the array substrate 22 is disposed on the back side (backlight device 30 side), and a peripheral portion is formed by the metal bezel 60 and the frame 32B. By being sandwiched, it is held integrally with the backlight device 30, and in particular, misalignment among the peripheral portions (upper edge portion 70A, lower edge portion 70B, left edge portion 70C and right edge portion 70D) of the CF substrate 70. The CF substrate 70 is attached to the frame 32B (the opening edge of the casing 32) so that the positioning portions 71 provided on the frame 32B are arranged at the four corners cut away by forming the prevention edges 73. ) On the front side. Then, the bezel 60 is placed on the front side of the upper edge portion 70A, the lower edge portion 70B, the left edge portion 70C, and the right edge portion 70D of the CF substrate 70, and the bezel 60 is fixed to the frame 32B and the chassis 32A. Integrate with.

As described above, according to the present embodiment, the positioning portion 71 that protrudes toward the liquid crystal panel 20 is provided on the frame 32B, and the upper edge portion 70A, the lower edge portion 70B, and the left edge portion 70C of the CF substrate 70 are provided. In addition, a misalignment prevention edge 73 that is disposed opposite to the positioning portion 71 and is in contact with the positioning portion 71 is formed at a corner portion where the right edge portion 70D intersects, so that the misalignment of the liquid crystal panel 20 can be prevented. it can.

<Other embodiments>
The present invention is not limited to the embodiments described with reference to the above description and drawings. For example, the following embodiments are also included in the technical scope of the present invention.

(1) In the first embodiment, the outer dimension of the CF substrate 21 is set to a dimension that protrudes only in the short direction of the array substrate 22. However, the present invention is not limited to this, and as shown in FIG. Is set to a dimension that protrudes only in the longitudinal direction of the array substrate 22, and the peripheral portion of the CF substrate 80 is positioned so as to protrude leftward and rightward from the peripheral edge of the array substrate 22. It may be pasted on. At this time, the left edge portion 80A and the right edge portion 80B of the CF substrate 80 may be placed on the front side of the frame 32B.

(2) In the second embodiment, each misalignment prevention edge 73 formed on the CF substrate 70 has a substantially L shape formed by two edges intersecting at a substantially right angle. However, the present invention is not limited to this. Instead, for example, as shown in FIG. 9, each misalignment prevention edge 91 formed on the CF substrate 90 may be constituted by one oblique edge extending in an oblique direction. At this time, the shape of the positioning portion 92 provided in the frame 32 B may be a shape having an inclined surface along the inclination of the misalignment prevention edge 91.

(3) In the second embodiment, the misalignment prevention edge 73 is formed at all four corners of the CF substrate 70. However, the present invention is not limited to this, and the misalignment prevention edge is, for example, 4 of the CF substrate. It may be formed at three or less corners of the two corners, and is not necessarily formed at the corners, and it is not necessarily formed at the corners, for example, the middle position of the peripheral edge (for example, the center position of the upper edge in the longitudinal direction of the CF substrate) Etc.).

(4) In the above-described embodiment, the cold cathode tube 31 for irradiating the liquid crystal panel 20 with light is housed in the housing 32. In addition to this, as shown in FIG. The sub-light source 101 that irradiates light to the lower edge portion 100B may be accommodated at a position directly behind the lower edge portion 100B of the CF substrate 100 in the body 32. Thereby, various information can be displayed outside the active area. At this time, an external circuit such as the driver board 53 may be connected to an edge part (for example, the upper edge part 100A) different from the edge part for displaying various kinds of information in the peripheral part of the CF substrate 100. The sub light source 101 does not necessarily have to be installed at a position directly behind the protruding edge portion such as the lower edge portion 100B. For example, the sub light source 101 may be installed at an appropriate position in the housing 32 where a space can be secured. You may make it irradiate light toward a protrusion edge part.

(5) In the above embodiment, the internal connection part 41B provided on the CF substrate 21 and the terminal part 29 of the wiring provided on the array substrate 22 are connected by the anisotropic conductive film 51. For example, they may be connected by metal bumps.

(6) In the above embodiment, one end of the conductor pattern 41 formed on the back surface of the CF substrate 21 is the external connection portion 41A, and the other end (internal connection portion 41B) is connected to the terminal portion 29 of the array substrate 22. However, the present invention is not limited to this, and the terminal portion of the array substrate is formed at a position close to the upper or lower edge portion of the CF substrate on the surface of the array substrate (surface on the liquid crystal side), and one end is formed on the driver substrate The other end side of the connected flexible substrate may be inserted between the terminal portion of the array substrate and the CF substrate to be connected to the terminal portion. At this time, the terminal portion of the array substrate corresponds to the “external connection portion” in the claims.

(7) In the above embodiment, the case where the TFT 25 is used as the switching element has been shown. However, the present invention is also applicable to a display device using a switching element other than the TFT 25 such as MIM (Metal Insulator Metal). Can do.

TV: TV receiver, 10: liquid crystal display device, 20: liquid crystal panel, 21, 70, 80, 90, 100 ... CF substrate (first substrate), 21A, 70A, 100A ... upper edge (projecting edge), 21B, 70B, 100B ... Lower edge (projecting edge), 22 ... Array substrate (second substrate), 23 ... Liquid crystal layer, 25 ... TFT (switching element), 29 ... Terminal part, 30 ... Backlight device, 31 ... cold cathode tube (light source), 32 ... housing, 32B ... frame (opening edge of housing), 41 ... conductor pattern, 41A ... external connection part, 50 ... flexible substrate, 51 ... anisotropic conductive film, 53 ... Driver board (external circuit), 70C, 80A ... Left edge (projection edge), 70D, 80B ... Right edge (projection edge), 71, 92 ... Positioning part, 73, 91 ... Misalignment prevention edge, 101 ... Sub light source

Claims

A liquid crystal panel in which a liquid crystal layer is sandwiched between a first substrate and a second substrate which are arranged to face each other, and a switching element is provided on the liquid crystal layer side of the second substrate;
A backlight device that houses a light source that emits light to the liquid crystal panel and has a housing that opens to the liquid crystal panel side;
An external circuit for driving the liquid crystal panel;
A liquid crystal display device comprising:
An outer dimension of the first substrate is set larger than an outer dimension of the second substrate;
Of the first substrate and the second substrate, the second substrate is disposed on the backlight device side, and the outer peripheral portion of the first substrate protrudes outward in the plate surface direction from the second substrate. The liquid crystal panel and the backlight device are integrally held in a state where the projecting edge is supported by the opening edge of the housing, and at least one of the first substrate and the second substrate A liquid crystal display device in which an external connection portion connected to the external circuit is formed on a surface of the substrate on the liquid crystal layer side, and the external circuit is arranged in the housing.
The external connection portion is one end of a conductor pattern formed on the surface of the first substrate on the liquid crystal layer side, the other end of the conductor pattern is connected to a terminal portion provided on the second substrate, and the switching The liquid crystal display device according to claim 1, wherein a drive signal from the external circuit is supplied to the element.
The liquid crystal display device according to claim 2, wherein the other end of the conductor pattern and the terminal portion are connected by an anisotropic conductive film.
The liquid crystal display device according to claim 2, wherein the other end of the conductor pattern and the terminal portion are connected by a metal bump.
The said external connection part is formed in the surface at the side of the said liquid crystal layer of the said 2nd board | substrate, The other end of the flexible substrate by which one end was connected to the said external circuit is connected with the said external connection part. Liquid crystal display device.
The liquid crystal panel has a substantially rectangular shape that is long in one direction,
6. The liquid crystal display according to claim 1, wherein an outer dimension of the first substrate is set to a dimension protruding in any one of a longitudinal direction and a short direction of the second substrate. apparatus.
The liquid crystal panel has a substantially rectangular shape that is long in one direction,
6. The liquid crystal display device according to claim 1, wherein an outer dimension of the first substrate is set to a dimension protruding in both a longitudinal direction and a short direction of the second substrate.
A positioning portion that protrudes toward the liquid crystal panel is provided at the opening edge of the housing.
The liquid crystal display according to any one of claims 1 to 7, wherein a misalignment prevention edge that is arranged to face the positioning portion and is in contact with the positioning portion is formed on the protruding edge portion of the first substrate. apparatus.
The liquid crystal display device according to any one of claims 1 to 8, wherein a sub-light source that irradiates light to a protruding edge portion of the first substrate is accommodated in the housing.
A television receiver comprising the liquid crystal display device according to any one of claims 1 to 9.