JP2002116701A - Image display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an image display device capable of effectively discharging static electricity which adversely affects or destructs a liquid crystal display element, a transistor and the inside of a driving circuit. SOLUTION: The liquid crystal display device 11 is constructed in such a way that the electric charge movable shortest distance X from an edge part 40 with an exposed conductor of a bezel (a conductive material) 14 to a surface of a gate signal driving circuit 23 is shorter than the electric charge movable shortest distance Y from the edge part 40 with the exposed conductor of the conductive member to a gate signal line g where the characteristic quality of the image display device is impaired by applying static electricity.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image display device capable of preventing static electricity induced in a device from being smoothly discharged to thereby prevent a characteristic change and destruction due to the static electricity.

[0002]

2. Description of the Related Art A liquid crystal display device has been widely used in the prior art. A liquid crystal display device that is particularly widely used is a display device using an active matrix liquid crystal display panel.

The active matrix type liquid crystal display panel is arranged at a plurality of gate signal lines, a plurality of source signal lines intersecting the gate signal lines, and at each intersection of each gate signal line and each source signal line. And an active element. Further, the active matrix type liquid crystal display panel includes a transparent insulating substrate (active matrix substrate) such as glass having a pixel electrode connected to the gate signal line and the source signal line via each pixel driving element. And a transparent insulating substrate (counter substrate) made of glass or the like having a one-film common electrode, and a liquid crystal layer is sandwiched between these substrates.

As the pixel driving element, for example, a thin film transistor (TF) made of amorphous silicon
T: Thin Film Transistor, MIM (Metal Insula)
torMetal) element. Each gate signal line, each source signal line, and the common electrode are made of ITO (Indium Tin Oxide).
It is made of a transparent electrode film such as a film.

FIG. 4 shows a general TFT type liquid crystal display device 5.
1 is a plan view, and FIG. 5 is a cross-sectional view taken along a cutting line BB in FIG.

[0006] A TFT type liquid crystal display device 51 includes a pair of polarizing plates 53a and 53b arranged so as to sandwich a liquid crystal panel 52 therebetween.
And a thin insulating sheet 50 made of PET or the like, which is disposed so as to surround the end of the liquid crystal panel 52 and is in contact with the liquid crystal panel 52.
It comprises an upper bezel 54b and a lower bezel 54a covered with a. The liquid crystal panel 52 includes a substrate member 55
a, a sealing member 56 for attaching the substrate member 55b at a predetermined interval, and a liquid crystal layer 57 interposed between the pair of substrate members 55a, 55b.

One of the substrate members 55a includes a light-transmitting insulating substrate 58a made of glass, plastic, or the like, an electrode pattern formed on one surface of the light-transmitting insulating substrate 58a, and a passivation film 59 covering the electrode pattern.
And an alignment film 60 a covering the passivation film 59. The electrode pattern includes a plurality of gate signal lines g1, g2,.
("G" is used when collectively referred to) and the gate signal line g
, Sm (when collectively referred to as "s"), a gate signal line g and a source signal line s
And a plurality of pixel electrodes 62 connected to the drain D of each transistor 61. Each transistor 61
The gate G is connected to the gate signal line g, and the source S is connected to the source signal line s.

Further, the gate signal line g is connected to a gate signal drive circuit 63 to which a control signal is transmitted. A driving power supply is transmitted to the gate signal driving circuit 63 by a driving power supply wiring 70 and a ground wiring 71, and a gate driving signal is transmitted and driven by a gate driving signal wiring 72.

A source signal drive circuit 64 having a similar function is connected to the source signal line s. The drive power is transmitted by the drive power supply wiring 73 and the ground wiring 71, and the source drive signal is transmitted and driven by the source drive signal wiring.

The drive power supply lines 70 and 73, the drive signal lines 72 and 74, and the ground line 71
5 (Flexible Print Circuit) and FPC75
Gathered at the edge of. Each of the wirings is connected to a substrate and a connector on which a power supply circuit for driving a liquid crystal display device, a circuit for driving a signal line, a ground and a common electrode driving circuit in a product equipped with the liquid crystal display device are provided.

Each of the drive circuits 63 and 64 is arranged near one end of each of the gate signal lines g and the source signal lines s in the longitudinal direction.

On the other hand, the substrate member 55b is
8b, a common electrode 65 formed so as to cover substantially the entire surface of one surface of the translucent insulating substrate 58b, and an alignment film 60b formed so as to cover the common electrode 65. A common electrode drive signal wiring 76 is connected to the common electrode 65. The substrate members 55a and 55b are made of alignment films 60a and 60b.
Are arranged so as to face each other, and are adhered at a predetermined interval by the sealing member 56. Board members 55a and 55
A liquid crystal material is injected into a space surrounded by b and the sealing member 56 to form a liquid crystal layer 57, whereby the liquid crystal panel 52 is formed.

In the TFT type liquid crystal display device 51 configured as described above, a component that is easily charged with static electricity is a bezel 54 that is a conductive material. Bezel 5
Since No. 4 is arranged so as to cover the outside of the liquid crystal display device, friction and contact with a person are likely to occur, and it is considered that the device is most easily charged.

When the bezel 54 is charged with static electricity as described above, the charged static electricity jumps to the gate signal line g and the source signal line s, and each signal line generates heat and breaks or is connected to the signal line. If the characteristics of the transistor 61 change or the voltage of static electricity is high, the transistor 61 may be broken.
Further, the gate signal drive circuit 63 and the source signal drive circuit 6
4 and a gate signal line g and a source signal line s
However, if the signal lines, the gate drive signal lines 72, and the source drive signal lines 74 that are not covered with the translucent insulating substrate 58b fly, the gate signal drive circuit 63 and the source signal drive circuit 64 may be broken. . In particular, as shown in FIG. 5, when the edge portion 79 of the upper bezel 54b and the bezel are punched at the time of manufacturing, a small but protruding portion is generated at the edge portion.
Even when the protrusion is charged low, static electricity is likely to fly, which adversely affects the display device.

As a result, in FIG.
Static electricity accumulated in the substrate member 55a from the edge portion 79
To the gate signal line g, the gate signal line g is disconnected due to heat generation due to excessive current flow, or the characteristics of the transistor 61 connected to the gate signal line g are changed or destroyed.

In recent years, in a liquid crystal display device, the proportion of an image display area has increased from a design point of view, and the proportion of a non-display area such as a bezel 54 outside a display area called a picture frame has increased. In addition to the smaller size, the weight and thickness have been reduced, the thickness of the liquid crystal panel 52 has been reduced, and the bezel 54, the liquid crystal panel, and the insulating sheet 50 for insulation have also become thinner.

As described above, the shortest distance between the bezel 54 and the signal line in the liquid crystal panel is shortened, and the static electricity is easily scattered. Therefore, static electricity accumulated in the bezel 54 in the production process of the liquid crystal display device jumps from the exposed edge portion or minute projection, damaging the liquid crystal display device and causing a reduction in production efficiency.

Conventionally, as a countermeasure, the generation of static electricity is suppressed by connecting the bezel to the ground in the liquid crystal display panel and discharging the bezel.

Japanese Patent Application Laid-Open No. Hei 10-232621 discloses a liquid crystal display panel having a structure in which a static electricity escaping pattern is provided, and a static electricity escaping projection is provided in a portion corresponding to the static electricity escaping pattern inside a shield case, and a discharge is generated only therebetween. And a liquid crystal display module.

[0020]

However, in the conventional static electricity removing structure as described above, it is necessary to remove an edge portion exposing a conductor and minute projections generated in a manufacturing process in order to release static electricity. However, there is a problem in that the number of manufacturing steps increases and the manufacturing cost increases.

Further, as another method, a method of connecting a conductive member (bezel) to the ground by soldering or a method of contacting the conductive member with the ground wiring similarly increase the number of manufacturing steps and reduce the manufacturing cost. There was a problem of getting high.

As still another method, the method of contacting the conductive member with the ground wiring has problems such as a large contact resistance and poor contact, resulting in a poor static electricity removing function, and a problem with the conductive member and the ground. Processing for contact with the wiring is required, which also causes an increase in cost.

In Japanese Patent Application Laid-Open No. Hei 10-232621, it is necessary to provide a static electricity escaping pattern. There is a drawback in that it is not possible to follow the recent trend of reducing the size of a part, and the design is restricted.

The present invention has been made in view of the above problems, and an object of the present invention is to reduce the adverse effect of static electricity by efficiently discharging static electricity induced in an image display device. It is to provide an image display device that can be manufactured.

[0025]

In order to solve the above-mentioned problems, an image display device according to the present invention comprises a pair of substrates arranged so as to face each other and at least one of the pair of substrates. A display panel including a signal line provided and a driver circuit connected to the signal line and supplying a signal to the signal line; at least the drive circuit is provided at an end portion of the display panel; In an image display device in which an end is covered by a conductive member such as a bezel, a surface of the drive circuit is connected to a power supply or a ground for supplying a voltage to the drive circuit, The shortest distance that the electric charge can move from the conductor exposed portion of the conductive member where the conductor is exposed to the surface of the drive circuit is the shortest distance that the electric charge can be moved from the conductor exposed portion of the conductive member to the signal line. It is characterized by shorter than away.

According to the present invention, static electricity accumulated in the conductive member is discharged to the surface of the drive circuit, so that discharge from the conductive member to the signal line can be prevented. Therefore, when an active element such as a TFT is connected to the signal line, it is possible to prevent the characteristic change and destruction of the active element due to static electricity. Further, it is possible to prevent elements inside the drive circuit from being destroyed by static electricity applied from the signal lines.

Since the surface of the drive circuit is connected to a power supply or a ground, static electricity discharged to the surface of the drive circuit can be quickly released from the drive circuit without adversely affecting the drive circuit. .

As a structure in which the surface of the drive circuit is connected to the power supply or the ground, for example, a structure in which the surface of the drive circuit is covered by a silicon substrate connected to the power supply or the ground may be used. Further, the entire surface of the drive circuit does not need to be connected to the power supply or the ground, and it is sufficient that the portion that receives discharge from the conductive member is connected to the power supply or the ground.

The above-mentioned "signal line" includes a wiring extending from the drive circuit in the display direction of the display panel and connected to the signal line in the display area.

The present invention can be suitably used, for example, in a liquid crystal display device, but is not limited thereto, and is applicable to all flat display devices (flat displays) having a drive circuit.
Can be applied to

In the image display device of the present invention, it is preferable that the conductor exposed portion is provided at an edge portion of the conductive member, so that static electricity accumulated in the conductive member can be removed from the edge portion by a driving circuit. Therefore, discharge from the edge portion to the signal line can be prevented.

Further, in the image display device of the present invention, the conductor exposure portion may be provided as a protruding portion protruding from the drive circuit at or near a position facing the drive circuit. preferable. Accordingly, static electricity accumulated in the conductive member is discharged from the protruding portion to the surface of the drive circuit, so that discharge from the protruding portion to the signal line can be prevented.

The conductor exposed portion may be provided on both the edge portion and the projecting portion.

Further, in the image display device of the present invention, it is preferable that the projecting portion is formed to have a tapered shape, so that static electricity is discharged from the projecting portion to the surface of the drive circuit. Can be made easier.

In a configuration in which a plurality of drive circuits are provided, or in a configuration in which a plurality of drive circuits are provided, at least one of the drive circuits moves electric charges from the exposed portion of the conductive member to the surface of the drive circuit. The minimum possible distance may be any configuration as long as it is shorter than the minimum distance over which the charge from the conductor exposed portion of the conductive member to the signal line can move.

[0036] More preferably, the protruding portion is formed in a range immediately above the drive circuit in the conductive member.

As a result, the static electricity induced on the conductive member can be more reliably flowed to the surface of the drive circuit, and the application of the static electricity to the area other than the drive circuit surface causes problems such as disconnection of wiring and breakage of the circuit. Can be prevented.

The range directly above the drive circuit in the conductive member refers to a range of the same size as the drive circuit on the conductive member facing the drive circuit.

According to another aspect of the present invention, there is provided an image display apparatus comprising: a pair of substrates disposed to face each other; and a signal line disposed on at least one of the pair of substrates. A drive panel connected to the signal line and supplying a signal to the signal line, wherein at least one of the ends of the display panel where the drive circuit is provided is a conductive member. In a covered image display device, a surface of the drive circuit is connected to a power supply or a ground for supplying a voltage to the drive circuit, and a conductor of the conductive member is exposed to the display panel. The shortest distance over which the charge from the exposed portion to the surface of the drive circuit can move is shorter than the shortest distance over which the charge from the conductive exposed portion of the conductive member to the signal line can move. Together are, is one terminal connected to the signal lines, a configuration in which the other terminal is provided with a capacitor connected to ground.

According to the above configuration, even when a large amount of static electricity exceeding the charge withstand amount of the drive circuit is induced in the conductive member and discharged to the drive circuit, the static electricity is discharged to the capacitor and the current is reduced. Further, it is possible to prevent the wiring from being broken due to the heat generated by the excessive flow of the current, and to prevent the output portion and the transistor of the drive circuit inside the drive circuit from being adversely affected or destroyed.

Further, it is more preferable that the capacitor is provided on a flexible wiring board connected to the signal line.

Thus, when arranging the capacitor,
There is no need to change the layout of wiring and ICs on the substrate.

[0043]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS [Embodiment 1] One embodiment of an image display device according to the present invention will be described below with reference to FIGS.

The liquid crystal display device 11 according to the present embodiment
As shown in FIG. 1, this is a TFT type liquid crystal display device. FIG.
FIG. 2 is a sectional view of the liquid crystal display device 11 of FIG. 1 as viewed from a cutting line AA.

The liquid crystal display device 11 of the present embodiment includes a liquid crystal panel 12, a pair of polarizing plates 13a and 13b disposed to sandwich the liquid crystal panel 12, and a conductive member disposed to surround the liquid crystal panel 12. And a bezel 14.

The liquid crystal panel 12 includes a liquid crystal layer 17, a pair of substrate members 15a and 15b sandwiching the liquid crystal layer 17, and a sealing member 16 for bonding the pair of substrate members 15a and 15b at a predetermined interval. It is configured.

One of the substrate members 15a is composed of a light-transmitting insulating substrate 18a made of glass, plastic, or the like, an alignment film 20a applied and formed on one surface of the light-transmitting insulating substrate 18a, Insulating substrate 18a and alignment film 2
0a, the passivation film 19 and the gate signal line g
And a source signal line s (not shown).

On the other hand, the substrate member 15b is made of a thin insulating sheet 1
0, a transparent insulating substrate 18b, a common electrode 25 which is a full-surface electrode formed so as to cover almost the entire surface of one surface of the transparent insulating substrate 18b, and a coating applied to cover the common electrode 25. And the formed alignment film 20b. The common electrode 25 is connected to a common electrode drive signal line 36.

The substrate members 15a and 15b are
0a and 20b are arranged to face each other, and the sealing member 16
Are attached at predetermined intervals. Substrate member 1
A liquid crystal material is injected into a space surrounded by 5a and 15b and the sealing member 16 to form a liquid crystal layer 17, whereby the liquid crystal display device 11 is formed.

Further, in the liquid crystal display device 11 of the present embodiment, the bezel 14 of the conductive member covering the outside is not electrically connected to the ground wiring and is in an electrically open state. Note that the edge portion of the bezel 14 should be located between the gate / source signal drive circuits 23 and 24 and the liquid crystal panel 12, but in FIG. 1 showing the present embodiment, the edge portion 40 is provided for convenience of explanation. Each drive circuit is arranged inside the box.

In the liquid crystal display device 11 of the present embodiment, the electrode pattern is formed by a plurality of gate signal lines g1, g2,
g3,..., gn (when collectively referred to, “g” is used)
And a plurality of source signal lines s1, s2, s3,..., Sm
("S" is used when collectively referred to.), A plurality of transistors 21 and a plurality of pixel electrodes 22.

The gate signal lines g are arranged parallel to each other at regular intervals, and the source signal lines s are connected to the gate signal lines g.
The wires are insulated from each other at regular intervals so as to be orthogonal to.

The transistor 21 is formed near the intersection of the gate signal line g1 and the source signal line s1,
The gate G is connected to the gate signal line g1, the source S is connected to the source signal line s1, and the pixel electrode 22 is connected to the drain D.

The gate signal line g is connected to a gate signal drive circuit 23 to which a control signal is transmitted. The driving power is transmitted to the gate signal driving circuit 23 by the driving power supply wiring 30 and the ground wiring 31, and the gate driving signal is transmitted and driven by the gate driving signal wiring (signal line) 32.

The source signal drive circuit 24 having the same function is connected to the source signal line s. Drive signal and drive power supply are source drive signal wiring (signal line)
34, the drive power supply wiring 33, and the ground wiring 31 transmit and drive.

On the source signal drive circuit side, as shown in FIG. 3, the FPC 35 (Flexible Print Circuit) composed of the signal line 43 and the insulators 44a and 44b is arranged in the bezel and differs from the gate side. It has a different configuration.

Each of the drive circuits 23 and 24 is arranged close to one longitudinal end of each of the gate signal line g and the source signal line s.

Although the drive power supply wiring 30 and the gate drive signal wiring 32 for the gate signal drive circuit 23 are described as one wiring, they are not always limited to one. In particular, the gate drive signal wiring 32 usually has a plurality of lines,
In the description of the present invention, the gate drive signal wiring 32 is collectively described as a single line. The same applies to the source-side drive power supply wiring 33 and the source drive signal wiring.

These drive power supply wirings 30 and 33, drive signal wirings 32 and 34, and ground wiring 31
35 (Flexible Print Circuit) and FPC3
Collected at the end of 5. Each of the wirings is connected to a board and a connector on which a power supply circuit for driving a liquid crystal display device, a signal circuit for driving a signal, a ground and a common electrode driving circuit in a product equipped with the liquid crystal display device are provided.

In recent years, with the miniaturization and high-density of the most advanced electronic devices such as liquid crystal displays, static electricity has degraded or destroyed the characteristic quality in the device, and has been a factor that hinders the improvement of the product yield. It has become.

The static electricity is generated when the balance between the + ions and the − ions in the substance is lost mainly due to friction.
It may also be caused by induction of an electrostatic charge by an electric field, ions in the atmosphere, contact with a charged person, and the like.

For electronic device parts such as liquid crystal displays, the above-mentioned causes cause the static electricity to be charged on the conductive member, and the charged conductive member is discharged to the components in the device, thereby causing the device to be damaged. Had the problem of being destroyed.

In the liquid crystal display device 11 of the present embodiment, the shortest distance in which the charge can move from the edge portion 40 exposing the conductor of the upper bezel 14b to the surface of the gate signal drive circuit 23 disposed on the opposing substrate. A gate signal driving circuit such that X is shorter than a shortest distance Y in which charges can move from the edge portion 40 exposing the conductor of the upper bezel 14b to the gate signal line g disposed on the substrate facing the upper bezel. 23 are arranged.

With this configuration, the static electricity charged in the upper bezel 14b is transferred to the edge portion 4 exposing the conductor.
From 0, the discharge is not performed on the liquid crystal display element disposed on the substrate member or the gate signal line g connected to the transistor 21, but is discharged to the surface of the gate signal drive circuit 23 disposed in the vicinity. . Accordingly, the gate signal line g is discharged, and the gate signal line g is disconnected due to heat generation due to excessive current flow.
Or adversely affect the inside of the gate signal drive circuit 23,
Destruction can be prevented.

In the case where the source signal drive circuit 24 is disposed on the source signal drive circuit 24 side, the source signal drive circuit 24 is similarly disposed only as described above, and the source signal drive circuit 24 is moved from the edge 40 of the charged bezel 14. Circuit 24
Static electricity is discharged to the source signal line s formed on the substrate member, and the current flows too much, causing the signal line to generate heat and break, or the liquid crystal display connected to the signal line. It is possible to prevent the element, the transistor 21 and the arranged source signal drive circuit 24 from being adversely affected or destroyed.

In the gate drive signal wiring 32, the drive power supply wiring 30, and the ground wiring 31, the edge portion 40 is also provided in the same manner as described above in consideration of the discharge of static electricity to the wirings.
Is the shortest distance over which the charge can move from the edge of the exposed conductor 40 to the drive power supply wiring 30, ground wiring 31, and gate drive signal wiring 32. It is preferable to make the length shorter.

Here, for comparison, a conventional TFT
FIG. 5 is a cross-sectional view of the liquid crystal display device 51 taken along a cutting line BB in FIG. Similarly to the above, the static electricity charged on the upper bezel 54b is discharged from the edge portion 79 exposing the conductor of the bezel 54, but the shortest distance X where the charge to the surface of the gate signal drive circuit 63 can move is:
Since the charge is longer than the shortest distance Y that can move to the gate signal line g connected to the liquid crystal display element or the transistor 61 or the like, which is adversely affected by the application, static electricity is discharged to the adjacent gate signal line g side. As a result, the gate signal line g is disconnected due to heat generated due to excessive current flow, adversely affecting or destroying the inside of the liquid crystal display element, the transistor 61, and the gate signal drive circuit 63.

Further, unlike the related art, it is not necessary to connect the bezel 54 to the ground for removing static electricity, and it is not necessary to increase the number of manufacturing steps for connecting the bezel 54 to the ground. T without doing
The FT liquid crystal display device 51 can be manufactured.

As described above, in the present embodiment, when the upper and lower bezels 14a and 14b are in an electrically open state (when the upper and lower bezels 14a and 14b are not grounded), static electricity is applied to the edge of the bezel 14 exposing the conductor. The portion 40 is charged and discharged from the edge portion 40. However, by arranging the driving circuits 23 and 24 as described above, the discharge from the edge portion 40 can be specified to the surfaces of the driving circuits 23 and 24, and the liquid crystal display device can be prevented from being electrostatically damaged. 11 can be manufactured.

The present invention can be widely applied not only to an active matrix type liquid crystal display device but also to a flat image display device (flat panel display) having a drive circuit. For example, MIM (Metal Insulator Metal), simple matrix liquid crystal display, PDP (Plasma Display Pan)
el), EL (Electroluminescence), etc.

The drive circuit is usually made of a silicon IC, and such an IC is used by fixing a silicon substrate to a power supply or a ground. Therefore, in discharging to the surface of the drive circuit, the static electricity flows toward the power supply or the ground, and does not damage the inside of the drive circuit. Therefore, in practicing the present invention, the type of the driving circuit does not need to be particularly limited.

In a configuration in which a plurality of driving circuits are provided or a configuration in which a plurality of driving circuits are provided, for at least one driving circuit, the shortest distance at which the charge from the conductor exposed portion of the conductive member to the surface of the driving circuit can move is provided. What is necessary is just a structure shorter than a distance.

[Second Embodiment] The following will describe another embodiment of the present invention with reference to FIG. For convenience of explanation, members having the same functions as those shown in the drawings of the first embodiment are given the same reference numerals, and explanations thereof are omitted.

The liquid crystal display device 41 of the present embodiment is similar to that of FIG.
As shown in FIG. 11, the liquid crystal display device 11 according to the first embodiment is characterized in that a protruding portion 14c exposing the conductor of the upper bezel 14b is formed at a position facing the gate signal driving circuit 23.
Is different. Other configurations are the same as those of the liquid crystal display device 11.

As shown in FIG. 6, the protruding portion 14c exposing the conductor of the upper bezel 14b on the substrate member 15b is provided at or near the position facing the surface of the gate signal drive circuit 23. It is provided so that static electricity can fly more easily from the tip of the protruding portion 14c than other places above. Therefore, there is an effect that the position where the static electricity is discharged is easily specified.

For this reason, the static electricity induced in the bezel 14 is transferred to the gate signal drive circuit output and the gate signal line g from the projecting portion 14 c exposing the conductor of the bezel 14 before the surface of the gate signal drive circuit 23. And the gate signal line g is broken due to heat generation due to excessive current flow, or the output section of the drive circuit and the transistor 21 inside the gate signal drive circuit 23 are adversely affected or destroyed. Can be prevented.

The effect of the present invention can be obtained in the same manner on the source side by taking the same relationship as in FIG.

Further, the driving circuit is originally an IC,
The C silicon substrate (substrate) and the like are connected to a power supply or a ground. Therefore, according to the present invention, the conventional design can be used as it is, without changing the wiring on the glass substrate or the IC. That is, the effect of the present invention can be obtained without the necessity of changing the wiring and the design on the glass substrate only by disposing the protruding portion of the bezel at or near the position facing the drive circuit.

It is desirable that the protrusion 14c has a shape as shown in FIGS. 8 and 9, for example.

In the image display device shown in FIGS. 8 and 9,
The width xd of the gate signal drive circuit 23 is 2 mm, the diameter xa of the protrusion 14c is 0.8 mm, and the height xb is 0.3 m.
m, distance x between gate signal drive circuit 23 and protrusion 14c
c is formed to be 0.2 mm. Here, the gate signal drive circuit 23 will be described, but the same applies to the source signal drive circuit 24.

Since the projecting portion 14c is formed at a position facing the gate signal driving circuit 23 and the entire projecting portion 14c is formed in a range immediately above the gate signal driving circuit 23, The induced static electricity can more reliably flow to the surface of the gate signal drive circuit 23. Therefore, it is possible to prevent problems such as disconnection of wiring due to application of static electricity and destruction of the gate signal drive circuit 23.

The shape of the projection 14c is not limited to the range indicated by the above numerical values. However, it is more preferable that the diameter of the projecting portion 14c provided to face the gate signal drive circuit 23 is smaller than the width of the gate signal drive circuit 23.
Accordingly, when the height of the protrusion 14c is constant, the tip of the protrusion 14c becomes sharper, and when the distance to the gate signal drive circuit 23 is equal, the static electricity induced in the bezel 14 can be more reliably. The gate signal drive circuit 23 can easily flow to the surface. Therefore, it is possible to prevent static electricity from being applied to a portion other than the surface of the gate signal drive circuit 23, and to prevent a problem caused by the applied static electricity.

Third Embodiment Still another embodiment of the present invention will be described below with reference to FIG. For convenience of description, members having the same functions as those shown in the drawings of the first and second embodiments are given the same reference numerals, and descriptions thereof will be omitted.

The liquid crystal display device 42 of the present embodiment is similar to that of FIG.
As shown in FIG. 7, the liquid crystal display device 41 is different from the liquid crystal display device 41 in that the tip of a projection 14d exposing a conductor provided on the upper bezel 14b is tapered. Other configurations are the same as the configuration of the liquid crystal display device 41 described above.

Regardless of the shape of the conductor-exposed portion and the shape of the tip of the conductor-exposed portion,
The effects described in the first and second embodiments can be obtained. However, as in the third embodiment, when the tip of the projecting portion exposing the conductor is tapered, the discharge is more likely to occur, so that the position where the bezel 14 discharges to the substrate is more easily specified, and the discharge is facilitated. The discharge can be effectively performed to the target drive circuit, for example, the gate signal drive circuit 23.

[Fourth Embodiment] The following will describe another embodiment of the present invention with reference to FIG. For convenience of description, members having the same functions as those shown in the drawings described in the first to third embodiments are given the same reference numerals, and descriptions thereof are omitted.

The liquid crystal display device 80 of the present embodiment is similar to that of FIG.
As shown at 0, the drive signal wiring 32 connected to the gate signal drive circuit 23 is connected to one terminal of the capacitor 81a to be arranged, and the other terminal is connected to the ground wiring 31.

Similarly, the source drive signal line 34 connected to the source signal drive circuit 24 is connected to one terminal of the capacitor 81b provided on the source drive signal line 34, and the other terminal is connected to the ground line 31. Connected to

Thus, when the capacitance of the static electricity applied to the gate signal drive circuit 23 or the source signal drive circuit 24 exceeds the capacity of the gate signal drive circuit 23 or the source signal drive circuit 24, each drive signal wiring 32 ・
Since the capacitors 81a and 81b are connected to the capacitor 34, static electricity flows to the capacitors 81a and 81b.

Therefore, a large amount of static electricity is applied to the bezel 1
4 and applied to the source signal drive circuit 24 or the gate signal drive circuit 23, the capacitor 81a
Since the current is discharged to 81b, the drive signal wirings 32 and 34 are disconnected due to heat generated due to excessive current flow, or the output portion of the drive circuit and the transistor 21 inside the gate signal drive circuit 23 or the source signal drive circuit 24 are damaged. It can be prevented from being adversely affected or destroyed.

Further, the capacitors 81a and 81b
Since it is arranged on the PC (flexible wiring board) 35, it is not necessary to change the positions of the wiring and the IC on the translucent insulating substrate 18a. That is, the capacitors 81a and 81b
Are arranged on the FPC 35, and the terminals of the capacitors 81a and 81b are connected to the respective drive signal wirings 32 and 34 and the ground wiring 31.
, Wiring on the translucent insulating substrate 18a,
The above effects can be obtained without changing the design.

For example, the charge resistance of the gate signal drive circuit 23 is Q _F , and the stray capacitance of the gate signal drive circuit 23 is C F
_F , where the withstand voltage capacity is V, Q _F = C _F × V.

[0093] The charge with static electricity Q _E, if the stray capacitance C _E, the voltage is _{V E, Q E = C E} × V E , and the large electrostatic capacity occurs, a Q _F <Q _E In such a case, the gate signal drive circuit 23 may be broken.

Therefore, the liquid crystal display device 80 of the present embodiment
According to the above, when a capacitor having an electric capacity C ₁ is added,
The charge withstand amount Q _F of the gate signal drive circuit 23 is as follows: Q _F = (C _F + C ₁ ) × V.

That is, the charge resistance of the gate signal drive circuit 23 can be set to Q _F ≧ Q _E, and large static electricity exceeding the charge resistance of the gate signal drive circuit 23 is applied to the gate signal drive circuit 23. Even if each drive signal wiring 3
Problems such as disconnection of the wirings 2 and 34 and destruction of the gate signal drive circuit 23 can be prevented, and a highly reliable image display device can be obtained.

[0096]

According to the image display apparatus of the present invention, the shortest distance from the exposed portion of the conductive member to the surface of the drive circuit where the electric charge can move is equal to the distance from the exposed portion of the conductive member to the signal line. The configuration is shorter than the shortest possible distance.

Therefore, the static electricity generated on the conductive member is
Even if static electricity is applied, it can be efficiently discharged to the surface of the drive circuit, which has no effect. Therefore, each signal line generates heat due to the influence of static electricity and breaks, or the characteristics in the image display device change. It will not be destroyed.

In the image display device of the present invention, by providing the conductor exposed portion of the conductive member at the edge of the conductive member, the position where the discharge is generated from the conductive member is specified, and the effect is exerted on the surface of the drive circuit as the discharge target. This has the effect of statically discharging static electricity.

Further, in the image display device of the present invention, by providing a protruding portion having a conductor exposed at a position facing the drive circuit disposed on the substrate or in the vicinity thereof, the place where the electrostatic discharge is generated can be specified. In addition, it is possible to more efficiently discharge static electricity to the surface of the drive circuit as a discharge target.

Further, by making the tip of the protruding portion tapered, it is possible to more easily specify the place where the electrostatic discharge is generated and to easily discharge to the surface of the drive circuit as the discharge target.

It is more preferable that the projecting portion is formed in a range of the conductive member immediately above the drive circuit.

Therefore, the static electricity induced on the conductive member can be more reliably caused to flow to the surface of the drive circuit, and the application of the static electricity to the area other than the drive circuit surface causes problems such as disconnection of wiring and breakage of the circuit. The effect that it can prevent is produced.

As described above, the image display device of the present invention
The surface of the drive circuit is connected to a power supply or a ground for supplying a voltage to the drive circuit, and from a conductor exposed portion of the conductive member where a conductor is exposed to the display panel to a surface of the drive circuit. The shortest distance in which the electric charge can move is formed so as to be shorter than the shortest distance in which the electric charge from the conductor exposed portion of the conductive member to the signal line can move, and one terminal is connected to the signal line. In this configuration, a capacitor is connected and the other terminal is connected to the ground.

Therefore, even when a large amount of static electricity exceeding the electric charge capacity of the drive circuit is induced in the conductive member and discharged to the drive circuit, the static electricity is discharged to the capacitor.
This has the effect of preventing the wiring from being broken due to heat generated by excessive current flow, and preventing the output section and transistor of the drive circuit inside the drive circuit from being adversely affected or destroyed.

Further, it is more preferable that the capacitor is provided on a flexible wiring board connected to the signal line.

Therefore, there is an effect that it is not necessary to change the arrangement of the wiring and the IC on the substrate when arranging the capacitor.

[Brief description of the drawings]

FIG. 1 is a plan view schematically showing a configuration of a liquid crystal display device according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view of the liquid crystal display device taken along the gate line AA in FIG. 1;

FIG. 3 is a cross-sectional view on the source side of the liquid crystal display device taken along a section line A′-A ′ in FIG. 1;

FIG. 4 is a plan view showing a configuration of a conventional liquid crystal display device.

5 is a cross-sectional view of the liquid crystal display device taken along the line BB in FIG.

FIG. 6 is a sectional view schematically showing a configuration of a liquid crystal display device according to another embodiment of the present invention.

FIG. 7 is a cross-sectional view schematically showing a configuration of a liquid crystal display device according to still another embodiment of the present invention.

8 is a cross-sectional view illustrating an example of a shape of a protrusion in the liquid crystal display device of FIG.

FIG. 9 is a plan view of the liquid crystal display device of FIG.

FIG. 10 is a plan view showing a configuration of a liquid crystal display device according to still another embodiment of the present invention.

[Explanation of symbols]

 Reference Signs List 10 Insulating sheet 11 Liquid crystal display device (image display device) 12 Liquid crystal panel 13a / 13b Polarizing plate 14 Bezel (conductive member) 14a Lower bezel 14b Upper bezel 14c Projection 14d Projection 15a / 15b Substrate member 16 Sealing member 17 Liquid crystal layer 18a / 18b Translucent insulating substrate 20a / 20b Alignment film 21 Transistor 22 Pixel electrode 23 Gate signal drive circuit (Drive circuit) 24 Source signal drive circuit (Drive circuit) 25 Common electrode 40 Edge section 41 Liquid crystal display device (Image Display device) 42 Liquid crystal display device (image display device) 80 Liquid crystal display device (image display device) 81a / 81b Capacitor xa Diameter of protruding portion xb Height of protruding portion xc Distance from protruding portion to drive circuit surface xd Gate signal drive circuit width

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 2H092 GA45 GA60 GA64 JA24 NA14 PA05 PA06 5G435 AA16 AA17 BB12 CC09 EE02 EE37 EE42 EE47 GG21 GG32 GG34 HH12 HH14 KK02

Claims (7)

[Claims] 1. A pair of substrates disposed to face each other, a signal line disposed on at least one of the pair of substrates, and a signal connected to the signal line to supply a signal to the signal line. An image display apparatus comprising: a display panel having a driving circuit, wherein at least an end of the display panel at which the driving circuit is provided is covered by a conductive member. And a power supply or a ground for supplying a voltage to the drive circuit, and a charge can move from a conductor exposed portion of the conductive member where a conductor is exposed to the display panel to a surface of the drive circuit. An image display device, wherein the shortest distance is shorter than the shortest distance in which charges from the conductor exposed portion of the conductive member to the signal line can move. 2. The image display device according to claim 1, wherein the exposed conductor is provided at an edge of the conductive member. 3. The semiconductor device according to claim 1, wherein the conductor exposed portion is provided at a position facing the drive circuit or in the vicinity thereof as a protruding portion projecting from the drive circuit.
The image display device as described in the above. 4. The image display device according to claim 3, wherein said projecting portion is formed in a tapered shape. 5. The image display device according to claim 3, wherein the protruding portion is formed in a range immediately above the drive circuit in the conductive member. 6. A pair of substrates disposed to face each other, a signal line disposed on at least one of the pair of substrates, and a signal connected to the signal line to supply a signal to the signal line. An image display apparatus comprising: a display panel having a driving circuit, wherein at least an end of the display panel at which the driving circuit is provided is covered by a conductive member. And a power supply or a ground for supplying a voltage to the drive circuit, and a charge can move from a conductor exposed portion of the conductive member where a conductor is exposed to the display panel to a surface of the drive circuit. The shortest distance is formed so as to be shorter than the shortest distance in which charges from the conductor exposed portion of the conductive member to the signal line can move, and one terminal is connected to the signal line. Is, the image display apparatus characterized by comprising a capacitor the other terminal is connected to ground. 7. The image display device according to claim 6, wherein said capacitor is provided on a flexible wiring board connected to said signal line.