JPH117254A - Connection member and illumination device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide the long-life connection member which can obtain an excellent electric connection with a terminal to be connected without deforming or flawing the terminal to be connected and the illumination device which turns on a display panel for display by applying a driving signal to the connection terminal of the display panel through the connection member. SOLUTION: A connection sheet 1 as the connection member is formed by weaving flexible fiber 2 having its surface coated with a conductive material or covering a foaming core material 4 made of a pyramidal foaming elastic material with woven conductive cloth 3 and sticking the conductive cloth 3 on the foaming core material 4 with an adhesive 5. Namely, the elasticity of a mat type sheet obtained by gathering flexible fiber is hard to decrease, so an excellent connection with the connection terminal of the sheet can be maintained in its initial state for a long period to obtain a long-life connection member. Further, the surface of the fiber is coated with the conductive material, so its electric resistance is low and the excellent electric connection with the connection terminal can be obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a connection member and a lighting device, and more particularly, to a connection member that is electrically connected to a connected terminal by contacting the terminal.
The present invention relates to a lighting device using the connection member, which supplies current to a display panel during lighting inspection or aging processing and turns on the display panel.

[0002]

2. Description of the Related Art Generally, various display panels (such as a liquid crystal display panel, a plasma display panel, an electroluminescent display panel, and a gas discharge display panel) are mounted on a drive circuit of a device on which the display panel is mounted. A lighting test is performed to check the display state by energizing. For example, in the case of a liquid crystal display panel, by performing a lighting test, display defects due to various causes such as disconnection of display electrodes and signal lines, inclusion of foreign matter, and uneven cell gap can be examined. By performing such a lighting inspection, it is possible to eliminate waste of mounting a defective display panel, and thus it is possible to reduce manufacturing costs.

In general, various display panels are subjected to an aging process for stabilizing the display performance by energizing for a certain period of time before being manufactured and handed over to a user. The lighting inspection and the aging process are performed by connecting the display panel to a lighting device. In order to perform the lighting inspection and the aging process efficiently, it is necessary to easily and quickly attach and detach the display panel to and from the lighting device, and to securely connect the display panel to the lighting device.

In a normal lighting device, a connection sheet provided in the lighting device is brought into close contact with an external connection terminal of the display panel, and a driving signal is applied from the lighting device to the display panel through the connection sheet to supply electricity. Is performed.
Conventionally, a connection sheet made of conductive rubber has been widely used. However, since the conductive rubber is formed by mixing a conductive material such as carbon with an insulating rubber such as a silicon rubber, the conductive rubber has a large electric resistance. for that reason,
The drive signal applied to the display panel has a drawback that the waveform is dull due to the time constant due to the large electrical resistance of the connection sheet, and the dull waveform of the drive signal lowers the accuracy of the lighting inspection and the efficiency of the aging process. In addition, since the electrical resistance is large, the connection sheet generates heat when energized, and the heat promotes the aging failure of the conductive rubber, so that the life of the connection sheet is shortened. Further, there is a disadvantage that the insulating rubber adheres to the connection terminals of the display panel and causes a connection failure when the display panel is mounted on the drive circuit.

Therefore, as disclosed in Japanese Patent Publication No. 2550662, there has been proposed a technique using a resilient mat-like sheet in which metal thin wires are gathered as a connection sheet. The mat-shaped sheet made of a thin metal wire has a low electric resistance and has no risk of adhering to a connection terminal of a display panel, and thus can avoid all of the above-mentioned conventional disadvantages.

[0006]

According to the above-mentioned publication, the mat-like sheet made of a fine metal wire has good contact because the small sharp surface of the fine wire presses the external connection terminal of the display panel with a large pressure per unit area. There is a statement that can be maintained.

However, the fact that the small sharp surface of the thin wire presses the external connection terminal of the display panel with a large pressure per unit area causes a problem that an excessive force is applied to the external connection terminal to cause deformation or disconnection. . For example, as shown in FIG. 6, a transparent electrode forming each external connection terminal 102 of a color filter side substrate 101 of a liquid crystal display panel is formed on a color filter layer 103 made of a soft acrylic resin. Therefore, when a mat-shaped sheet made of a thin metal wire is pressed against the external connection terminals 102, the external connection terminals 102
Is buried in part 102a and part 1 that is damaged and disconnected
02b occurs.

[0008] Further, a mat-like sheet in which thin metal wires are gathered has a problem that even if an elastic metal is used as a material, the elasticity of the sheet rapidly decreases due to repeated use, and the life is short. When the elasticity of the mat-shaped sheet is reduced, a connection failure occurs between the sheet and the external connection terminal of the display panel, and a drive signal is not accurately applied to the display panel. Is reduced.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to obtain a good electrical connection with a connected terminal without deforming or damaging the connected terminal. It is an object of the present invention to provide a connection member having a long life and a lighting device for applying a drive signal to a connection terminal of a display panel via the connection member to light up and display the display panel.

[0010]

A connecting member according to a first aspect of the present invention has been made to achieve the above object, and is a connecting member that is electrically connected to a connected terminal by contacting the terminal. It is formed from a mat-like sheet in which flexible fibers whose surfaces are coated with a conductive material are assembled.

In the present invention, since the elasticity of the mat-like sheet in which the flexible fibers are aggregated is not easily reduced by repeated use, a good connection state between the sheet and the connection terminals should be maintained in the initial state for a long time. And a long-lived connection member can be obtained. In addition, since the surface of the fiber is coated with a conductive material, its electric resistance is low, and good electric connection with the connection terminal can be obtained. In particular, when a metal is used as the conductive material, it is possible to obtain good conductive properties equivalent to those of a mat-like sheet made of thin metal wires.

[0012] Further, since the flexible fiber is used as compared with the thin metal wire, even if the connecting member is pressed against the connecting terminal, no excessive force is applied to the connecting terminal, and the connecting terminal is deformed. There is no risk of damage or damage. Next, the connection member according to claim 2 is a connection member that is electrically connected to the connection terminal by contacting the terminal to be connected,
A foam core made of a foamable elastic material having a surface coated with a conductive material is provided. The portion coated with the conductive material is a portion that contacts at least the connection terminal.

In the present invention, since the foamed core material is made of a foamable elastic material, the foamed core material is rich in flexibility and elasticity, flexibly responds to the unevenness of the connected terminal, and is constantly deformed even if pressing is repeated. hard. Therefore, when the connection member is pressed against the connection terminal, the foam core material is compressed and deformed, and the connection member and the connection terminal can be reliably connected after absorbing the unevenness of the connection terminal. And, even if the connection member is used repeatedly, since the elastic force of the foamed core material does not easily decrease,
A good connection between the connection member and the connection terminal can be maintained for a long time, and a long-life connection member can be obtained.

Further, since the surface of the foamed core is coated with a conductive material, the surface of the foamed core has a low electric resistance, and good electrical connection with the connection terminals can be obtained. And since a foam core material is rich in flexibility and elasticity, even if it presses a connection member to a connection terminal, excessive force will not be applied to a connection terminal and there is no possibility that a connection terminal may be deformed or damaged. In addition, there is no possibility that the foamed core material adheres to the connection terminal unlike conductive rubber.

Next, the connecting member according to claim 3 is
A connection member that is electrically connected to the connection terminal by contacting the terminal to be connected. The connection member is made of a foamed core made of a foamable elastic material, and is woven with a flexible fiber having a surface coated with a conductive material. Or a woven conductive cloth. The conductive cloth is stuck on the surface of the foam core material, and the stuck portion is at least a portion in contact with the connection terminal.

In the present invention, since the foamed core material is made of a foamable elastic material, the foamed core material is rich in flexibility and elasticity, flexibly responds to the unevenness of the terminal to be connected, and constantly deforms even after repeated pressing. hard. Therefore, when the connection member is pressed against the connection terminal, the foam core material is compressed and deformed, and the connection member and the connection terminal can be reliably connected after absorbing the unevenness of the connection terminal. And, even if the connection member is used repeatedly, since the elastic force of the foamed core material does not easily decrease,
A good connection between the connection member and the connection terminal can be maintained for a long time, and a long-life connection member can be obtained.

The conductive cloth is woven or knitted with a flexible fiber having a surface coated with a conductive material. Therefore, the electric resistance of the conductive cloth is low, and good electric connection with the connection terminal can be obtained. Especially,
When a metal is used as the conductive material, good conductive properties equivalent to a mat-like sheet made of a thin metal wire can be obtained.

Since the flexible fibers are used as compared with the fine metal wire, even if the connecting member is pressed against the connecting terminal, no excessive force is applied to the connecting terminal, and the connecting terminal is deformed. There is no risk of damage or damage. in addition,
The conductive cloth does not adhere to the connection terminals unlike the conductive rubber.

Next, the lighting device according to claim 4 is
A drive signal is applied to the connection terminal of the display panel via the connection member according to any one of claims 1 to 3, and the display panel is lit. Therefore, according to the present invention, it is possible to securely connect the connection member and the connection terminal of the display panel and to apply an accurate drive signal to the display panel, thereby reducing the accuracy of the lighting inspection and the efficiency of the aging process. Can be improved.

[0020]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a partial cross-sectional perspective view of a connection sheet (connection pad) 1 used in the lighting device of the display panel of the present embodiment.

The connection sheet 1 as a connection member is made of a foam made of a prismatic foamable elastic material by a conductive cloth 3 woven or knitted with flexible fibers 2 coated on the surface with a conductive material. The periphery of the core 4 is wrapped, and the conductive cloth 3 is attached to the foamed core 4 with an adhesive 5. Therefore, the cross-sectional shape of the connection sheet 1 is quadrangular.

As the fiber 2, various fibers such as nylon, polyester, rayon, cotton, wool, silk and the like can be used. Various conductive materials such as nickel, copper, carbon, silver, gold, lead, and tin can be used as the conductive material to be coated on the surface of the fiber 2. The coating method is plating or PVD (Physical Vapor).
A well-known method such as a Deposition method may be used.

Any method may be used for weaving or knitting the conductive cloth 3. As the foamed core material 4,
Various foamable elastic materials such as urethane foam and foamed polypropylene can be used. FIG. 2 is a plan view of the liquid crystal display panel 11 of the present embodiment.

The transmissive liquid crystal display panel 11 has a structure in which a liquid crystal layer 14 is sealed between two glass substrates 12 and 13 facing each other. Eave portions 12a and 12b having a constant width A protruding from the glass substrate 13 are provided on the peripheral edges of two opposing sides of the rectangular glass substrate 12, respectively. Eave portions 13a and 13b having a constant width B protruding from the glass substrate 12 are provided at the peripheral portions of two opposing sides of the rectangular glass substrate 13, respectively.

Each eave portion 12a, 12b, 13a, 13b
On the top, a plurality of external connection terminal portions 15 as connected terminals are provided.
Is arranged. When the liquid crystal display panel 11 is viewed with the glass substrate 12 on the upper side and the glass substrate 13 on the lower side,
External connection terminal portion 1 formed on each eaves portion 12a, 12b
5 faces downward, and the external connection terminal 15 formed on each of the eaves 13a and 13b faces upward.

Each of the external connection terminals 15 is made of an ITO (Indium)
Multiple external connection terminals (not shown) consisting of linear transparent electrodes made of Tin Oxide) or tin oxide
It is composed of Each external connection terminal is arranged in parallel with the width direction of each formed eaves portion 12a, 12b, 13a, 13b.

FIG. 3 is a schematic plan view of the lighting device 21 of the display panel according to the present embodiment. The lighting device 21 includes the base 2
2, rails 23a to 23d, holding jigs 24a to 24
d, panel supports 25a, 25b, polarizing plates 26a, 26
b, a backlight 27, and a drive circuit 28.

Each of the rails 23a and 23b
-C, and each rail 23c, 23d is
2 are arranged on the DD line, and the CC line and the DD line are orthogonal to each other. The holding jigs 24a to 24d are slidably mounted on the rails 23a to 23d, respectively. On the base 22 surrounded by the holding jigs 24a to 24d, panel supports 25a and 25b, polarizing plates 26a,
26b and a backlight 27 are provided respectively.

The width of each of the long panel supports 25a and 25b is determined by the width of each eave portion 13 of the liquid crystal display panel 11 shown in FIG.
The width is set to be the same as the width B of a and 13b. Further, the length of each panel support 25a, 25b is determined by the length of each eave portion 13a, 1
3b is set to be the same as the length. And the base 22
At the top, each panel support 25a, 25b is
They are arranged corresponding to the positions of 3a and 13b.

In a state where the eaves portions 13a and 13b are mounted on the panel supports 25a and 25b, respectively, a polarizing plate 26a is disposed on the liquid crystal display panel 11, and a polarizing plate 26b is provided below the liquid crystal display panel 11. And the backlight 27 are arranged in this order.

A long connection sheet 1 is attached to each of the holding jigs 24a to 24d. Each connection sheet 1 is connected to a drive circuit 28. FIG.
FIG. 4 is a sectional view taken along line XX in FIG. 3. Holding jig 24b
Are an operation lever 31, an eccentric cam 32, an upper head 33,
A lower head 34 and a clamp spring 35 are provided.

The operation lever 31 is connected to an eccentric cam 32, and the cam surface of the eccentric cam 32 is in contact with an upper head 33 and a lower head 34. Long lower head 34
The connection sheet 1 is attached to the upper surface of the. The lengths of the long upper head 33, the lower head 34, and the connection sheet 1 are set to be the same as the lengths of the eave portions 12a and 12b.

The heads 33 and 34 are arranged to face each other. A clamp spring 35 composed of an extension coil spring is brought into contact with the upper head 33 to urge the upper head 33 toward the lower head 34 with a constant pressing force. When the eccentric cam 32 is rotated by operating the operation lever 31 in the holding jig 24b configured as described above, each of the heads 33 contacting the cam surface of the eccentric cam 32 according to the amount of rotation. The spacing of 34 changes.

Since the structure of the holding jig 24a is exactly the same as that of the holding jig 24b, the description is omitted.
FIG. 5 is a sectional view taken along line YY in FIG. The holding jig 24d includes an operation lever 41, an eccentric cam 42, an upper head 43, and a clamp spring 44.

The operation lever 41 is connected to the eccentric cam 42, and the cam surface of the eccentric cam 42 is in contact with the upper head 43. The connection sheet 1 is attached to the lower surface of the long upper head 43. The lengths of the upper head 43 and the connection sheet 1 are set to be the same as the lengths of the eaves portions 13a and 13b.

By sliding the holding jig 24d along the rail 23d, the upper head 43 and the panel support 2 are moved.
5b can be placed opposite to each other. A clamp spring 44 composed of an extension coil spring is in contact with the upper head 43, and the upper head 43 and the panel support 2
The upper head 43 is urged toward the panel support 25b with a constant pressing force in a state in which the upper head 5b and the upper head 5b are arranged to face each other.

In the holding jig 24d thus configured, when the eccentric cam 42 is rotated by operating the operation lever 41, the upper part of the eccentric cam 42 which is in contact with the cam surface according to the amount of rotation. The distance between the head 43 and the panel support 25b changes. Since the structure of the holding jig 24c is exactly the same as that of the holding jig 24d, the description is omitted.

Next, an operation and an operation when the lighting inspection or the aging process of the liquid crystal display panel 11 is performed using the connection sheet 1 and the lighting device 21 configured as described above will be described. First, the liquid crystal display panel 11 is attached to the lighting device 21.

That is, each eave portion 13a, 13b of the liquid crystal display panel 11 is placed on each panel support 25a, 25b. By sliding the holding jigs 24c and 24d along the rails 23c and 23d, the upper head 43 of the holding jigs 24c and 24d and the panel supports 25a and 25b face each other. State.

In this state, each holding jig 24c, 24d
By operating the operating lever 41, the distance between each upper head 43 and each panel support 25a, 25b is reduced. Then, as shown in FIG. 5, each eave portion 13a, 13b is sandwiched by the upper head 43 of each holding jig 24c, 24d and each panel support 25a, 25b.

As a result, the connection sheet 1 attached to the upper head 43 of each of the holding jigs 24c and 24d and the external connection terminal 15 of each of the eaves 13a and 13b come into close contact with each other. Here, since each clamp spring 44 urges each upper head 43 toward each panel support 25a, 25b with a constant pressing force, the connection sheet 1 is applied to each external connection terminal portion 15 by the pressing force. Pressed. That is, the pressing force between the connection sheet 1 and each of the external connection terminal portions 15 can be freely adjusted by changing the size, shape, material, or the like of the clamp spring 44 and arbitrarily setting the pressing force.

By sliding the holding jigs 24a, 24b along the rails 23a, 23b, a liquid crystal display panel is provided between the upper head 33 and the lower head 34 of each holding jig 24a, 24b. 11 each eave part 12
a and 12b are arranged.

In this state, each holding jig 24a, 24b
By operating the operation lever 31, the distance between each upper head 33 and each lower head 32 is reduced. Then, as shown in FIG. 4, each head 32, 33 of each holding jig 24a, 24b.
As a result, the eaves portions 12a and 12b are sandwiched.

As a result, the connection sheet 1 attached to the upper head 33 of each holding jig 24a, 24b and the external connection terminal 15 of each eave portion 12a, 12b come into close contact with each other. Here, since each of the clamp springs 35 urges each of the upper heads 33 toward each of the lower heads 32 with a constant pressing force, the connection sheet 1 is pressed against each of the external connection terminal portions 15 by the pressing force. . That is, the pressing force between the connection sheet 1 and each of the external connection terminal portions 15 can be freely adjusted by changing the size and shape or the material of the clamp spring 35 and arbitrarily setting the pressing force.

Next, the backlight 27 is turned on. Subsequently, a drive signal is applied from the drive circuit 28 to each external connection terminal unit 15 through each connection sheet 1, and the liquid crystal display panel 1
Lighting inspection or aging processing is performed by energizing 1 to display an image. As described in detail above, the connection sheet 1 of the present embodiment is formed by wrapping the foam core 4 with the conductive cloth 3.

Since the foamed core material 4 is made of a foamable elastic material, the foamed core material 4 is rich in flexibility and elasticity, and can flexibly cope with variations in the pressing force applied from the lower head 34 or the upper head 43 and irregularities of the glass substrates 12 and 13. However, there is a feature that it is hardly deformed constantly even when pressing is repeated. Therefore, when the connection sheet 1 is pressed against each external connection terminal 15, the foamed core material 4 is compressed and deformed, and each glass substrate 1 is pressed.
The connection sheet 1 and each of the external connection terminal portions 15 can be securely brought into close contact with each other after absorbing the variation in the thicknesses 2 and 13. For example, when urethane foam is used as the foamed core material 4, the thickness of the foamed core material 4 can be reduced to about ５ of the steady state, so that the glass substrates 12 and 13 can be compressed.
Can be sufficiently absorbed even if the variation in thickness is about 0.2 mm. Then, even if the connection sheet 1 is used repeatedly, the elasticity of the foamed core material 4 hardly decreases, so that the contact state between the connection sheet 1 and each external connection terminal portion 15 can be kept long in the initial state.
In order to ensure that the connection sheet 1 and the external connection terminals 15 are in close contact with each other, a pressing force is applied from the connection sheet 1 itself to the external connection terminals 15 by elastically deforming the foamed core material 4. There is a need.

Further, since the cross-sectional shape of the connection sheet 1 is quadrangular, each of the eaves 12a, 12b, 13a, 13b and each connection sheet 1 in each of the holding jigs 24a to 24d.
Can be reliably brought into contact with each other between the surfaces. The conductive cloth 3 is woven or knitted with flexible fibers 2 having a surface coated with a conductive material.
Therefore, the electric resistance of the conductive cloth 3 is low. In particular, when metal is used as the conductive material, it is possible to obtain good conductive properties equivalent to those of a mat-like sheet made of fine metal wires.

Therefore, if the connection sheet 1 is used in the lighting device 21, the connection sheet 1 is securely connected to each external connection terminal 15 of the liquid crystal display panel 11, and an accurate drive signal is applied to the liquid crystal display panel 11. Therefore, the accuracy of the lighting inspection and the efficiency of the aging process can be improved.

Further, since the fibers 2 which are more flexible than the thin metal wires are used, even if the connection sheet 1 is pressed against the external connection terminal portions 15, each of the external connection terminals constituting the external connection terminal portions 15 is formed. No excessive force is applied to the external connection terminals, and there is no possibility that the external connection terminals will be deformed or disconnected.

In addition, the conductive cloth 3 does not adhere to the external connection terminal 15 unlike conductive rubber. Therefore, when the liquid crystal display panel 11 is mounted on a drive circuit of a device on which the display panel is mounted, it is possible to prevent a connection failure from occurring. As described above, the use of the connection sheet 1 can solve all the problems of the conventional mat-like sheet in which the thin metal wires are gathered.

Incidentally, it is desirable that the width of each connection sheet 1 is set to be equal to or smaller than the widths A and B of the eaves portions 12a, 12b, 13a and 13b. this is,
The width of each connection sheet 1 is set to each eave portion 12a, 12b, 13
If the widths a and 13b are wider than the widths A and B, the pressing force of each connection sheet 1 is concentrated at the end of each eave portion, and uniform pressing force is not applied to each eave portion. This is because good contact between the surfaces of the external connection terminal 15 and the external connection terminal 15 may be hindered.

The thickness of each connection sheet 1 depends on the distance between the upper head 33 and the lower head 34 in each holding jig 24a, 24b, the upper head 43 of each holding jig 24c, 24d, and each panel support 25a. , 25b, and the pressing force of the clamp springs 35, 44, etc., it is necessary to set the thickness to an optimum value so that a good connection between the connection sheet 1 and the external connection terminal portion 15 can be obtained. is there.

By the way, in order to make the connection sheet 1 and the external connection terminal portion 15 surely contact each other, each of the fibers 2 of the conductive cloth 3 is connected to each of the linear external terminals constituting the external connection terminal portion 15. It is necessary to contact the connection terminal. For that purpose, the diameter of the fiber 2 may be smaller than the width of each external connection terminal, and the weave or stitch of the conductive cloth 3 may be smaller than the interval (terminal pitch) between the external connection terminals. Alternatively, the diameter of the fiber 2 may be larger than the width of each external connection terminal, and the longitudinal direction of each external connection terminal may intersect with the weaving direction or weaving direction of the conductive cloth 3.

The present invention is not limited to the above embodiment, but may be embodied as follows. Even in such a case, the same operation and effect as in the above embodiment can be obtained. (1) The cross-sectional shape of the connection sheet 1 is not limited to a quadrangle, but may be any shape as long as good contact with the external connection terminal portion 15 can be obtained, such as a triangle, a pentagon or more polygon,
It may be a circle or an ellipse.

(2) The conductive cloth 3 is arranged only at the contact portion between the connection sheet 1 and each external connection terminal 15 instead of wrapping the periphery of the foam core 4 with the conductive cloth 3. For example, in the above embodiment, since the cross-sectional shape of the connection sheet 1 is quadrangular, only one of the four peripheral surfaces of the connection sheet 1 is in contact with each external connection terminal 15.
Therefore, even when the conductive cloth 3 is stuck only on one surface of the connection sheet 1 that comes into contact with each external connection terminal 15, the same operation and effect as in the above embodiment can be obtained.

(3) In the liquid crystal display panel 11, the external connection terminals 15 are arranged on all four sides, but the present invention is applied to a case where the external connection terminals 15 are arranged on at least one side. . (4) Instead of providing the holding jigs 24a to 24d for the respective eave portions 12a, 12b, 13a, and 13b, independent holding jigs are provided for each external connection terminal portion 15.

(5) Lighting device 21 of liquid crystal display panel 11
The present invention is not limited to this, and is applied to lighting devices for various types of other display panels (plasma display panel, electroluminescent display panel, gas discharge display panel, etc.). (6) The conductive cloth 3 is omitted from the connection sheet 1 and the foamed core material 4 is removed.
The surface of which is directly coated with a conductive material is used in place of the connection sheet 1. In this case, although the function and effect of the conductive cloth 3 cannot be obtained, the function and effect of the foamed core material 4 can be obtained, and it is possible to solve all the problems of the conventional mat-like sheet in which the thin metal wires are gathered. it can. In this case, the portion of the foamed core material 4 to be coated with the conductive material does not need to be the entire surface of the foamed core material 4, but may be a portion that is in contact with each external connection terminal 15.

(7) The foamed core material 4 and the conductive cloth 3 are omitted from the connection sheet 1, and the mat-like sheet in which the flexible fibers 2 having a surface coated with a conductive material are assembled is replaced with the connection sheet 1 and used. I do. In this case, although the functions and effects of the foamed core material 4 and the conductive cloth 3 cannot be obtained, the functions and effects of the fibers 2 can be obtained. In addition, since the elasticity of the mat-like sheet in which the flexible fibers 2 are aggregated is not easily reduced by repeated use,
A good connection state between the sheet and each external connection terminal portion 15 can be maintained for a long time in the initial state. Therefore, also in this case, it is possible to solve all the problems of the conventional mat-like sheet in which the thin metal wires are gathered.

[Brief description of the drawings]

FIG. 1 is a partial cross-sectional perspective view of a connection sheet according to an embodiment.

FIG. 2 is a plan view of a display panel according to one embodiment.

FIG. 3 is a plan view of the lighting device according to the embodiment;

FIG. 4 is a sectional view taken along line XX in FIG. 3;

FIG. 5 is a sectional view taken along line YY in FIG. 3;

FIG. 6 is a perspective view of a conventional display panel.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Connection sheet 2 ... Fiber 3 ... Conductive cloth 4 ...
Foam core 11: LCD panel 15: External connection terminal 2
1. Lighting device

Claims (4)

[Claims] A connection member electrically connected to a connection terminal by contacting the connection terminal, wherein the connection member is made of a mat-like sheet in which flexible fibers whose surfaces are coated with a conductive material are aggregated. A connection member formed. 2. A connection member electrically connected to the connection terminal by contacting the connection terminal, the connection member comprising a foam core made of a foamable elastic material having a surface coated with a conductive material; A connection member, wherein a portion coated with a material is at least a portion that contacts the connection terminal. 3. A connection member electrically connected to a terminal to be connected by contacting the terminal to be connected, comprising: a foam core made of a foamable elastic material; and a flexible core having a surface coated with a conductive material. A conductive cloth woven or knitted with a certain fiber, wherein the conductive cloth is affixed to the surface of the foamed core material, and the affixed portion is at least a portion in contact with the connection terminal. Element. 4. A lighting device, wherein a driving signal is applied to a connection terminal of a display panel via the connection member according to claim 1 to light up and display the display panel. .