JPH11202357A - Liquid crystal display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a liquid crystal display device capable of improving reliability, reducing a manufacture cost, reducing man-hour and simplifying a manufacture process. SOLUTION: A driving IC 7 for driving a liquid crystal display panel 4, driving wiring 8 and input wiring 9 are provided on a lower glass substrate 6 and a dummy terminal is provided on one side and both sides of the input wiring 9 of the lower glass substrate 6. FPC 13 connected to the input wiring 9 and the dummy terminal, by using an anisotropic conductive film and the FPC is bent and adhered to the back surface of the lower glass substrate 6.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid crystal display device, and more particularly to a liquid crystal display device of an active matrix type using a thin film transistor or the like and having a flat shield case.

[0002]

2. Description of the Related Art An active matrix type liquid crystal display device is provided with a non-linear element (switching element) corresponding to each of a plurality of pixel electrodes arranged in a matrix. Since the liquid crystal in each pixel is theoretically always driven (duty ratio 1.0), the active system has a better contrast than the so-called simple matrix system that employs the time-division driving system, and particularly in the case of color. It is becoming an indispensable technology. A typical switching element is a thin film transistor (TFT)
There is.

[0003] For example, an active matrix type color liquid crystal display device using a thin film transistor and a pixel electrode as one component of a pixel has a liquid crystal display panel (LCD) in which a plurality of pixels are arranged in a matrix. Each pixel of the liquid crystal display panel is arranged in a drive wiring, that is, in an intersection area between two adjacent scanning signal lines and two adjacent video signal lines. The scanning signal line extends in the horizontal direction,
Also, a plurality thereof are arranged in the vertical direction. On the other hand, a plurality of video signal lines extend in the vertical direction intersecting with the scanning signal lines, and are arranged in a plurality in the horizontal direction.

A liquid crystal display panel has a lower substrate in which a thin film transistor, a transparent pixel electrode, an alignment film and the like are sequentially provided on a lower (based on liquid crystal) transparent glass substrate, a color filter on the upper transparent glass substrate, and a common transparent substrate. Pixel electrode,
It is composed of an upper substrate on which alignment films and the like are sequentially provided, a liquid crystal sealed between the alignment films of both substrates, and a sealing member for the liquid crystal provided on a peripheral portion of the panel. The transparent pixel electrode and the thin film transistor are provided for each pixel. One of a source electrode and a drain electrode of the thin film transistor is connected to the transparent pixel electrode, the other electrode is connected to a video signal line, and the gate electrode is connected to a scanning signal line.

A conventional flat-type liquid crystal display device is:
A liquid crystal display panel having mainly two thin upper and lower shield cases, a thin film transistor array, and attached to a window opened in the shield case, and a semiconductor integrated circuit chip (hereinafter referred to as a drive IC) for driving the liquid crystal display panel.
(Tape Automated Bonding) with TAB and printed circuit board (PC with TAB)
B). The input terminals of the drive wiring provided on the peripheral portion of the liquid crystal display panel (on the lower glass substrate larger in size than the upper glass substrate) and the outer lead on the output side of the TAB are connected to the anisotropic conductive film Are electrically connected by a film having a property that current flows but does not flow horizontally. Further, the input-side outer lead of the TAB is electrically and mechanically connected to a PCB terminal connected to a signal transmitting means outside the liquid crystal display device by soldering. Further, the electrodes (bonding pads) of the drive IC and the inner leads of the TAB are bonded.

Liquid crystal display panel, TA mounting drive IC
Components such as B and PCB are built in a shield case, and the two shield cases are combined and fixed. In addition, each shield case is provided with a window for the liquid crystal display panel, and the liquid crystal display panel is fitted in this window,
The liquid crystal display screen can be seen from the window.

Incidentally, an active matrix liquid crystal display device using a TFT is described in, for example, "1.
2.5-inch active matrix color liquid crystal display ", Nikkei Electronics, pp. 193-210,
Known on December 15, 1986, published by Nikkei McGraw-Hill.

[0008]

In a conventional liquid crystal display device, since TAB having insufficient reliability against heat is used, the lead of the TAB is often cut off during a heat cycle test or during use, and the number of man-hours is large. In this respect, there is a problem that the manufacturing cost increases.

Also, a so-called COG (chip-on-chip) in which a drive IC is directly mounted on a glass substrate without using a TAB.
Glass) implementations have also been proposed. However, conventionally, since the drive IC, PCB, and FPC are connected by soldering,
Au plating or the like is applied to the wiring pattern formed on the glass substrate, so that the number of steps is large and the soldering process is 200
Since the temperature is raised to at least ℃, there is a problem that the wiring pattern is easily peeled off.

[0010] The object of the present invention is to avoid using TAB,
An object of the present invention is to provide a liquid crystal display device that can improve reliability, reduce manufacturing cost, and have a small number of steps and a simple manufacturing process.

[0011]

In order to solve the above-mentioned problems, a liquid crystal display device according to the present invention comprises an upper glass substrate and a lower glass substrate having a portion superposed on the upper glass substrate and protruding from the upper glass substrate. A liquid crystal display panel comprising liquid crystal sealed and sealed between the upper glass substrate and the lower glass substrate, a drive IC for driving the liquid crystal display panel, and an output voltage of the drive IC applied to the liquid crystal display panel. A plurality of drive wirings to be supplied and a plurality of input wirings connected to input terminals of the drive IC are provided at portions of the lower glass substrate protruding from the upper glass substrate, and the plurality of input wirings on the lower glass substrate are provided. Electrically floating dummy terminals are provided on one side of the substrate, and the input wiring and the dummy terminals on the lower glass substrate are formed using an anisotropic conductive film.
A PC is connected, and the FPC is bent and adhered to the back surface of the lower glass substrate.

Further, the liquid crystal display device of the present invention is characterized in that an upper glass substrate, a lower glass substrate which is overlapped with the upper glass substrate and has a portion protruding from the upper glass substrate, and sealed between the upper glass substrate and the lower glass substrate. A liquid crystal display panel comprising sealed liquid crystal; a driving IC for driving the liquid crystal display panel; a plurality of driving wires for supplying an output voltage of the driving IC to the liquid crystal display panel; A plurality of input wirings connected to terminals are provided in a portion of the lower glass substrate protruding from the upper glass substrate, and dummy terminals electrically floating on both sides of the plurality of input wirings on the lower glass substrate are provided, An FPC is connected to the input wiring and the dummy terminal on the lower glass substrate by using an anisotropic conductive film, and the FPC is bent so that the lower glass substrate is bent. Characterized by being adhered to the back surface.

In the liquid crystal display device of the present invention, the driving IC is directly mounted on the glass substrate and TAB is not used.
The reliability can be improved without the risk of cutting the AB lead. Further, since the anisotropic conductive film is used without using TAB and soldering, the wiring pattern does not peel off,
The number of steps can be reduced, and the manufacturing process can be simplified.

In the liquid crystal display device of the present invention, the driving I
Since an electrically floating dummy terminal is provided on one or both sides of the input wiring pattern to C and the wiring pattern for connection between FPCs, the adhesive strength of the FPC to the lower glass substrate is increased. Therefore, even if the FPC is bent and adhered to the back surface of the lower glass substrate, the FP is restored by the restoring force of the FPC
The connection portion of C does not peel from the lower glass substrate.

[0015] Other objects and features of the present invention will become apparent from the following description with reference to the drawings.

[0016]

FIG. 4 is a sectional view of a liquid crystal display of an active matrix type color liquid crystal display according to an embodiment of the present invention, and FIG. 5 is an equivalent circuit diagram of the liquid crystal display.

{Overall Structure of Panel Section} As shown in FIG. 4, the liquid crystal display panel has a thin film transistor TFT1, a transparent pixel electrode ITO1, a protective film PSV1 of the thin film transistor TFT and a liquid crystal on a lower transparent glass substrate SUB1 based on a liquid crystal layer LC. Lower alignment film OR for setting the direction of molecules
A first substrate on which I1 is sequentially provided, and a black matrix BM, a color filter FIL, a protective film PSV2 for the color filter FIL, a common transparent pixel electrode ITO2, and an upper alignment film ORI2 are sequentially provided on an upper transparent glass substrate SUB2. The liquid crystal LC sealed between the second substrate and the respective alignment films ORI1 and ORI2 of the two substrates SUB1 and SUB2.
And a sealing material (sealing member) SL provided around the two substrates and sealing the liquid crystal LC between the two substrates. The thickness of the lower transparent glass substrate SUB1 is, for example, about 1.1 mm.

The center of FIG. 4 shows a cross section of one pixel portion, while the left side shows transparent glass substrates SUB1 and SUB2.
2 shows a cross section of a portion where the external lead-out wiring exists at the left edge portion of FIG. On the right are transparent glass substrates SUB1 and SU
The cross section of the right edge portion of B2 where there is no external lead-out wiring is shown.

In the method for manufacturing a liquid crystal display panel, the first method
And the second substrate are separately formed, and a spacer material (not shown) is interposed between the two substrates so that the alignment films ORI1 and ORI2 of the two substrates face each other. It is assembled by superposing at intervals, sealing the liquid crystal LC between both substrates, and sealing with a sealing material SL provided around both substrates. The backlight BL is arranged on the lower transparent glass substrate SUB1 side.

The sealing materials SL shown on the left and right sides of FIG. 4 are configured to seal the liquid crystal LC.
Transparent glass substrate S excluding liquid crystal filling port (not shown)
Provided along the entire periphery of the edges of UB1 and SUB2,
For example, it is made of an epoxy resin.

The common transparent electrode ITO2 on the side of the upper transparent glass substrate SUB2 is connected to an external lead wire provided on the lower transparent glass substrate SUB1 by a silver paste material SIL at at least one place. This external lead-out wiring is formed of the transparent pixel electrode layer ITO1.

The alignment films ORI1 and ORI2, the transparent pixel electrode ITO1, and the common transparent electrode ITO2 are made of a sealing material SL.
It is provided inside. The polarizing plate POL is provided on the outer surface of each of the lower transparent glass substrate SUB1 and the upper transparent glass substrate SUB2.

The transparent pixel electrode ITO1 and the thin film transistor TFT are provided for each pixel.

{Thin Film Transistor} The thin film transistor TFT of each pixel is divided into three (a plurality) in the pixel, and a thin film transistor (divided thin film transistor)
It is composed of TFT1, TFT2 and TFT3.
Each of the thin film transistors TFT1 to TFT3 has substantially the same dimensions (the same channel length and width). The divided thin film transistors TFT1 to T
Each of FT3 is mainly composed of a gate electrode GT, a gate insulating film GI, an i-type semiconductor layer AS made of an i-type (intrinsic, intrinsic, not doped with a conductivity type determining impurity) amorphous silicon (Si) semiconductor, , And a source electrode SD1 and a drain electrode SD2. It should be understood that the source / drain is originally determined by the bias polarity between them, and the polarity is inverted during the operation in the circuit of the liquid crystal display device, so that the source / drain is switched during the operation. However, in the following explanation, one is a source for convenience,
The other is fixed and expressed as a drain. The source electrode SD1 of the thin film transistor TFT is connected to the transparent pixel electrode ITO1, the drain electrode SD2 is connected to the video signal line DL, and the gate electrode GT is connected to the scanning signal line GL.

{Light shielding film BM} Upper transparent glass substrate SUB
A black matrix BM made of a chrome layer or the like is provided on portions of the substrate SUB2 corresponding to the scanning signal lines GL, the video signal lines DL, and the thin film transistors TFT in order to shield the thin film transistors TFT1 to 3 from the second side. Thereby, the contour of each pixel is made clear by the light shielding film BM, and the contrast is improved. That is, the light shielding film BM
Has two functions of light shielding for the semiconductor layer AS and black matrix.

It should be noted that the backlight may be attached to the SUB2 side and the SUB1 may be the observation side (externally exposed side).

{Common electrode ITO2} Common transparent electrode ITO
Numeral 2 is arranged to face a transparent pixel electrode ITO1 provided for each pixel on the external transparent glass substrate SUB1 side, and is configured to be common to a plurality of pixel electrodes ITO. A common voltage is applied to the common transparent electrode ITO2.

{Equivalent Circuit of Entire Display Panel} FIG. 5 shows an equivalent circuit of this liquid crystal display device. A plurality of pixels of the liquid crystal display section are arranged in the same column direction as the direction in which the scanning signal lines Y1, Y2, ... extend, and the pixel columns XiG, XiB, Xi + 1
R,... Color filter FI
L is formed in a dot shape for each pixel at a position facing the pixel and is dyed separately. iG, Xi + 1G, ...
It is a video signal line DL connected to a pixel on which a green filter G is formed. XiB, Xi + 1B,... Are video signal lines DL connected to the pixels on which the blue filters B are formed. Xi + 1R, Xi + 2R,... Are video signal lines DL connected to the pixels on which the red filter R is formed. These video signal lines DL are selected by video signal drive circuits provided above and below the liquid crystal display panel. Yi is a scanning signal line GL for selecting the pixel column X1 shown in FIG. Similarly, each of Yi + 1, Yi + 2,.
2, X3,... Are scanning signal lines GL for selecting each of the scanning signal lines. These scanning signal lines GL are connected to a vertical scanning circuit provided on the left side of the liquid crystal display panel. On the right side of the LCD panel is a power supply circuit and a host (upper processing unit)
There is provided a circuit for converting the information for CRT from the LCD to the information for TFT liquid crystal display panel.

FIG. 1 is an exploded perspective view of a liquid crystal display device according to an embodiment of the present invention, and FIG.
FIG. 3 is a partially enlarged perspective view of FIG. 1 showing a PC, a driving IC and the like, and FIG.

1 is an upper shield case, 2 is a holding spacer made of rubber or the like, 3 is a caulking projection integrally formed with the upper shield case 1, 4 is a liquid crystal display panel, 5 is an upper transparent glass substrate, 6 Is a lower transparent glass substrate. An upper transparent glass substrate 5 is overlaid on the lower transparent glass substrate 6, and a liquid crystal (not shown) is sealed and sealed between the two substrates. The size of the lower transparent glass substrate 6 is larger than that of the upper transparent glass substrate 5, and the outer peripheral portions of the four sides of the upper transparent glass substrate 5 become drive wiring regions of the liquid crystal display panel 4. 7
Is a drive IC, 8 is a drive wiring pattern formed on the lower transparent glass substrate 6, 9 is an input wiring pattern of the drive IC 7, 10a, 10b, 10c, and 10d are provided around four sides of the lower transparent glass substrate 6. FPC, 11 is a controller for converting a video signal into a TFT driving signal, 12 is a chip component such as a capacitor, a resistive element, or a passive element, and 13 is a connector into which a connector for receiving data from a personal computer or the like is inserted. Part, 14 is FPC10
Adhesive tape for attaching a to 10d to the lower transparent glass substrate 6, 15 is a lower shield case, 16 is a swaged hole formed in the lower shield case 15 for inserting the caulking projection 3, and 17 is a shield case. Earth, 18
Is an insulating vinyl sheet, and 19 is the ground of the FPC.
In FIG. 2, reference numeral 20 denotes a wiring pattern for connecting the FPCs 10a to 10d, and in FIG.
Anisotropic conductive film provided between 10a to 10d and wiring patterns 9 and 20 of lower transparent glass substrate 6, 22 is a bonding wire for connecting drive IC 7 and wiring patterns 8 and 9, and 23 is a driving wire. A mold resin for protecting and fixing the bonding wire 22 connected to the IC 7; 24, an IC adhesive for bonding the drive IC 7 to the lower transparent glass substrate 6; 25, a caulking portion of the caulking convex portion 3; Is a polarizing plate provided on the outer surface of the upper transparent glass substrate 5 and the lower transparent glass substrate 6. Although not shown, a diffusion plate for diffusing backlight light can also be attached to the lower shield case 15 with an adhesive or the like.

Next, a method of mounting the liquid crystal display device will be described. As shown in FIGS. 1 and 2, first, the driving IC 7 is positioned and bonded on the lower transparent glass substrate 6 using the IC adhesive 24, and is bonded to the wiring patterns 8 and 9 by the bonding wires 22. Wiring pattern 8,
The bonding side of No. 9 was made of Al / Cr or Al having good connectivity. Next, as shown in FIG. 3, the drive IC 7, the bonding wires 22, and the bonding portions are coated with resin to secure reliability (the mold resin 2).
3) COG mounting of the driving IC 7 is completed. During wire bonding, the number of wires is 10 VDT (10 inches).
About 2000 at the Visual Display Terminal)
Because it is a book, parallel bonding was adopted and the process was shortened.

Next, the FPCs 10 a to 10 d on which the controller 11 and the chip component 12 are mounted in advance are positioned on the wiring pattern 9, and are connected using the anisotropic conductive film 21. At this time, the FPC connection wiring patterns 20 for connecting the FPCs 10a to 10d to each other are also connected by the anisotropic conductive film 21 at the same time. The wiring areas 9 and 20 were designed to have as large an adhesion area as possible in consideration of the current margin of the anisotropic conductive film. The material of the wiring patterns 9 and 20 at the connection with the FPCs 10a to 10d was ITO (Nesa film) / Cr.

Next, as shown in FIG.
Od is adhered to the back surface of the lower transparent glass substrate 6 by using an adhesive tape 14 to complete an assembly as shown in FIG. The polarizing plate 26 is usually adhered when assembling the liquid crystal display panel itself. However, since the polarizing plate 26 may be damaged by heating when the mold resin 23 is cured, the assembly shown in FIG. 2 is completed. Later, it is better to paste.

Next, the assembly shown in FIG. 2 is housed in the shield cases 1 and 15, and the shield cases 1 and 15 are assembled. The shield cases 1 and 15 are caulked and fixed by the caulking projections 3 and the caulking holes 16 as shown in the caulking portion 25 in FIG. At this time, a spacer 2 made of rubber or the like is interposed between the upper shield case 1 and the assembly of FIG. 2 to provide between the FPCs 10a to 10d and the wiring patterns 9 and 20 of the lower transparent glass substrate 6. Since the connection portion of the anisotropic conductive film 21 is strongly pressed by the upper shield case 1 and the spacer 2, the reliability of the connection portion is improved. The ground 17 of the shield case shown in FIG. 1 is connected to the ground 19 of the FPC by soldering. Further, in order to ensure insulation of the drive wiring portion, an insulating vinyl sheet 18 is interposed between the lower shield case 15 and the assembly of FIG.

FIG. 6 is a partial plan view of the lower transparent glass substrate of the liquid crystal display panel. In this embodiment, the FPC 10 is provided on one side (or both sides) of the input wiring pattern 9 to the drive IC 7 and the wiring pattern 20 for connection between the FPCs 10a to 10d.
A plurality of dummy terminals 27 are provided in order to increase the adhesive strength of a to 10d to the lower transparent glass substrate 6. The dummy terminal 27 is not normally used. That is, the terminal is a terminal from which the display circuit is electrically disconnected, and is an electrically floating (floating) terminal.

In the liquid crystal display device of this embodiment, the driving IC 7
Is mounted on the lower transparent glass substrate 6 and the TAB is not used, so that there is no fear of cutting the lead of the TAB and the reliability can be improved. Further, since no TAB is used, the number of steps can be reduced and the manufacturing cost can be reduced. Further, the wiring patterns 9, 20 and the FPC 10a are formed by using the anisotropic conductive film 21 having a low connection time and a short heating time without using TAB.
Since 10d to 10d are connected, peeling of the wiring pattern does not occur, the number of steps can be reduced, the manufacturing process can be simplified, and the manufacturing cost can be reduced. The FPCs 10a to 10d are connected to each other by connecting the FPC to the connection wiring pattern 20 formed on the lower transparent glass substrate 6 via the anisotropic conductive film 21, so that a connection component such as an FPC for connection between FPCs is used. Is unnecessary, so that man-hours and manufacturing costs can be reduced. Further, the size of the wiring pattern at the portion connected by the anisotropic conductive film 21 can be increased because the spacer in the wiring formation region is wide, and the current capacity can be sufficiently satisfied. Therefore, in this embodiment, a lightweight, small, and inexpensive liquid crystal display device can be provided.

Further, the input wiring pattern to the drive IC and F
Since a plurality of dummy terminals are provided on one side or both sides of the inter-PC connection wiring pattern, the adhesive strength of the connection portion of the FPC to the lower glass substrate is increased.

Therefore, even if the FPC is bent and adhered to the back surface of the lower glass substrate, the connecting portion of the FPC does not peel from the lower glass substrate due to the restoring force of the FPC.

The embodiments of the present invention have been described above.
The present invention is not limited to the above-described embodiment, and it is needless to say that various changes can be made without departing from the scope of the present invention. For example, in the above embodiment, the FPCs 10a to
The FPC connection wiring pattern 20 provided on the lower transparent glass substrate 6 was used to connect the 10d members, but the FPC connection wiring pattern 2 was provided on the lower transparent glass substrate 6.
Instead of providing 0, the FPCs 10a to 10d may be partially overlapped with each other, and connection terminals may be provided and connected at the overlapping portions.

[0040]

As described above, according to the liquid crystal display device of the present invention, the driving IC is mounted directly on the glass substrate.
Since the TAB is not used, there is no fear of cutting the lead of the TAB, and the reliability can be improved. Further, since the anisotropic conductive film is used without using TAB and soldering, the wiring pattern does not peel off, the number of steps can be reduced, and the manufacturing process can be simplified, so that the manufacturing cost can be reduced.

The input wiring pattern to the drive IC and F
An electrically floating dummy terminal is provided on one or both sides of the PC-to-PC connection wiring pattern.
Has an increased adhesive strength to the lower glass substrate.

Therefore, even when the FPC is bent and adhered to the back surface of the lower glass substrate, the connecting portion of the FPC does not peel off from the lower glass substrate due to the restoring force of the FPC.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of a liquid crystal display device according to an embodiment of the present invention.

FIG. 2 is a partially enlarged view of FIG. 1 showing a liquid crystal display panel, a wiring pattern, an FPC, a driving IC, and the like.

FIG. 3 is a partial cross-sectional view of a liquid crystal display panel, an FPC, and the like near a controller.

FIG. 4 is a sectional view of a liquid crystal display section of an active matrix type color liquid crystal display device according to an embodiment of the present invention.

FIG. 5 is an equivalent circuit diagram of a liquid crystal display unit.

FIG. 6 is a partial plan view of a lower transparent glass substrate of the liquid crystal display panel.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Upper shield case 2 ... Spacer for holding down 3 ... Protrusion for caulking 4 ... Liquid crystal display panel 5 ... Upper transparent glass substrate 6 ... Lower transparent glass substrate 7 ... Drive IC 8 ... Drive wiring pattern 9 ... Input wiring pattern of drive IC 10a, 10b, 10c, 10d FPC 11 Controller 12 Chip part 13 Connector part 14 Adhesive tape 15 Lower shield case 16 Caulking hole 17 Ground of shield case 18 Vinyl sheet for insulation 19 Earth of FPC DESCRIPTION OF SYMBOLS 20 ... Wiring pattern for connection between FPC 21 ... Anisotropic conductive film 22 ... Bonding wire 23 ... Mold resin 24 ... Adhesive for IC 25 ... Caulking part 26 ... Polarizing plate 27 ... Dummy terminal

Claims (2)

[Claims] An upper glass substrate, a lower glass substrate having a portion that is overlapped with the upper glass substrate and protrudes from the upper glass substrate, and a liquid crystal sealed and sealed between the upper glass substrate and the lower glass substrate. A liquid crystal display panel; a driving IC for driving the liquid crystal display panel;
A plurality of drive wirings for supplying an output voltage of C to the liquid crystal display panel and a plurality of input wirings connected to input terminals of the drive IC are provided at portions of the lower glass substrate protruding from the upper glass substrate; An electrically floating dummy terminal is provided on one side of the plurality of input wirings on the lower glass substrate, and an FPC is connected to the input wiring and the dummy terminal on the lower glass substrate using an anisotropic conductive film, A liquid crystal display device wherein the FPC is bent and adhered to the back surface of the lower glass substrate. 2. An upper glass substrate, a lower glass substrate which is overlapped with the upper glass substrate and has a portion protruding from the upper glass substrate, and a liquid crystal sealed and sealed between the upper glass substrate and the lower glass substrate. A liquid crystal display panel; a driving IC for driving the liquid crystal display panel;
A plurality of drive wirings for supplying an output voltage of C to the liquid crystal display panel and a plurality of input wirings connected to input terminals of the drive IC are provided at portions of the lower glass substrate protruding from the upper glass substrate; Providing electrically floating dummy terminals on both sides of the plurality of input wirings on the lower glass substrate, connecting an FPC to the input wirings and the dummy terminals on the lower glass substrate using an anisotropic conductive film, A liquid crystal display device wherein the FPC is bent and adhered to the back surface of the lower glass substrate.