JP2002072243A - Liquid crystal display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the productivity and reduce the production cost by facilitat ing the manufacture of a liquid crystal display device having a laminated struc ture of plural liquid crystal layers. SOLUTION: This is a liquid crystal display device A provided with a liquid crystal panel 1 where plural liquid crystal layers 11C, 11M, 11Y are laminated in the direction of the thickness among plural substrates 10A-10F laminated in the direction of the thickness, and where terminal parts 14C, 14M, 14Y for wiring plural electrodes for applying a voltage to each liquid crystal of the liquid crystal layers 11C, 11M, 11Y are arranged on any side edge parts of plural substrates 10A-10F, and since the side edge parts of the plural substrates 10A-10F are out of place stepwise the plural terminal parts 14C, 14M, 14Y protrude out of the plural substrates 10A-10F, and are also arranged out of place in one direction.

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 having a structure in which a plurality of liquid crystal layers are stacked.

[0002]

2. Description of the Related Art There are various types of reflection type liquid crystal display devices, and a device having a schematic structure as shown in FIG. 11 has been proposed as a device capable of increasing the brightness of a liquid crystal display screen. I have. The liquid crystal display device shown in the figure is a so-called three-layer GH (Gest-Host) mode reflective color liquid crystal display device. The liquid crystal panel of this liquid crystal display device has a structure in which a plurality of transparent substrates 8a to 8d are stacked in the thickness direction thereof, and a predetermined color of two colors is provided between the transparent substrates 8a to 8d. There are provided a cyan liquid crystal layer 9C, a magenta liquid crystal layer 9M, and a yellow liquid crystal layer 9Y in which a sex dye is mixed. Except for some electrodes 90 (90a), the plurality of electrodes 90 are transparent electrodes that can transmit light. The electrode 90 (90a) has three types of liquid crystal layers 9
The electrodes are capable of reflecting light passing through C, 9M, and 9Y to the front of the liquid crystal panel.

According to the liquid crystal display device having such a configuration,
Color display can be performed based on the principle of subtractive color mixing using the function of transmitting or absorbing light of a predetermined color in each of the three types of liquid crystal layers 9C, 9M, and 9Y. Therefore, the liquid crystal display device having the above configuration does not require the use of a color filter or a polarizing plate, which is a factor for weakening light, and is optimal for increasing the brightness of the liquid crystal display screen.

[0004]

In the liquid crystal display having the above structure, it is necessary to individually drive each of the three types of liquid crystal layers 9C, 9M and 9Y. For this reason, conventionally, for example, when a simple matrix system is adopted as the liquid crystal driving system, three types of liquid crystal layers 9C and 9 are used.
M and 9Y electrodes (horizontal electrode and vertical electrode)
90, a horizontal driver 91A and a vertical driver 9
1B were individually connected by wiring.

However, the three types of liquid crystal layers 9
Horizontal driver 91A for each of C, 9M, 9Y
The operation of individually wiring and connecting the vertical drivers 91B is very complicated. Further, the total number of the horizontal or vertical drivers 91A and 91B also increases. Therefore, conventionally, the productivity of the liquid crystal display device having the above structure is poor,
There was a problem that the manufacturing cost was high. The liquid crystal display device having the above structure has an excellent advantage that the brightness of the liquid crystal display screen can be remarkably increased as compared with liquid crystal display devices of other types using a color filter or a polarizing plate, but the manufacturing thereof is complicated. In fact, the practical use has been delayed due to the high manufacturing cost.

The present invention has been conceived in view of such circumstances, and facilitates the manufacture of a liquid crystal display device having a structure in which a plurality of liquid crystal layers are stacked, thereby improving the productivity. The task is to reduce production costs.

[0007]

DISCLOSURE OF THE INVENTION In order to solve the above problems, the present invention employs the following technical means.

In the liquid crystal display device provided by the present invention, a plurality of liquid crystal layers are provided in a stacked manner in the thickness direction between a plurality of substrates stacked in the thickness direction. A liquid crystal display device, comprising: a liquid crystal panel in which terminal portions for wiring a plurality of electrodes for applying a voltage to each liquid crystal are provided on any of a plurality of side edges of the plurality of substrates. Since the side edges of the plurality of substrates are displaced in a stepwise manner, the plurality of terminal portions protrude from between the plurality of substrates and are arranged in an array displaced from each other in a certain direction. It is characterized by having.

In the liquid crystal display device having such a configuration, the plurality of terminals protrude from between the plurality of substrates and are displaced in a certain direction.
The wiring member can be easily brought into contact with each of the plurality of terminal portions. Therefore, the wiring connection work of the driver to the plurality of terminal portions becomes easy. Further, in the present invention, it is also possible to connect one wiring member to each of the plurality of terminal portions, or collectively connect one wiring to the plurality of terminal portions to perform wiring connection. Also, it is possible to reduce the total number of wiring members and the total number of drivers. As a result, according to the present invention, the manufacturing operation of the liquid crystal display device is facilitated, and the manufacturing cost can be reduced.

[0010] In a preferred embodiment of the present invention, there is provided light reflecting means for reflecting light transmitted through the plurality of liquid crystal layers from the front of the liquid crystal panel toward the front of the liquid crystal panel, The plurality of liquid crystal layers include a cyan liquid crystal layer mixed with a dichroic dye, a magenta liquid crystal layer, and a yellow liquid crystal layer, or a red liquid crystal layer, a green liquid crystal layer, and a blue liquid crystal layer. There is.

According to this structure, the liquid crystal display device according to the present invention can be a reflection type liquid crystal display device capable of full color display without using a color filter or a polarizing plate. Can have a very high brightness.

In another preferred embodiment of the present invention, the plurality of liquid crystal layers further include a black liquid crystal layer.

According to such a configuration, the use of the black liquid crystal layer makes it possible to clearly express a black image.

In another preferred embodiment of the present invention, a driver for driving the plurality of liquid crystal layers includes:
A flexible cable having a wiring pattern on which the driver is mounted and having conduction with the driver;
And the flexible cable is bent into a shape corresponding to the stepped side edge of the plurality of substrates, so that the plurality of terminals provided on the side edge are provided. It is conductive to the part.

According to such a configuration, it is possible to easily establish an electrical connection between the driver and the plurality of terminals via the flexible cable, and the wiring connection work of the driver is further facilitated. Is done.

In another preferred embodiment of the present invention, the plurality of terminal portions include a plurality of common wiring terminal portions for switching voltage application to the plurality of electrodes in a scanning line arrangement direction. And a plurality of terminal portions for segment wiring for switching voltage application to the plurality of electrodes in a direction in which the scanning lines extend, and the plurality of terminal portions for common wiring have a common terminal. One driver is electrically connected.

According to such a configuration, the control of switching the voltage application to each liquid crystal of the plurality of liquid crystal layers in the scanning line arrangement direction is performed simultaneously by one driver, and the control is remarkably performed. It will be easier. Also, the number of drivers is reduced, which is more preferable in reducing the manufacturing cost of the liquid crystal display device.

In another preferred embodiment of the present invention, a common driver is electrically connected to the plurality of terminal portions for the segment wiring.
Further, the driver is configured to switch and control the voltage application to each electrode of the plurality of liquid crystal layers in the direction in which the scanning lines extend.

According to such a configuration, the control of switching the voltage application to each liquid crystal of the plurality of liquid crystal layers in the direction in which the scanning line extends can be collectively performed by one driver. Therefore, the total number of drivers can be reduced, and reduction in manufacturing cost can be further promoted.

In another preferred embodiment of the present invention, of the plurality of substrates, the two substrates located on the outermost layers on the front and back sides are arranged.
One substrate has a greater thickness than the other substrates located between them.

According to such a configuration, the mechanical strength of the liquid crystal panel can be ensured by increasing the thickness of the two outermost substrates. On the other hand, since the thickness of the other substrate located between the two substrates is reduced, it is possible to bring the plurality of liquid crystal layers in a stacked state closer to each other in the thickness direction of the liquid crystal panel. In this way, when the liquid crystal panel is viewed from an oblique direction, the mutually corresponding pixels of the liquid crystal display screen displayed by the plurality of liquid crystal layers do not appear to be displaced from each other, and the image quality can be improved. it can.

In another preferred embodiment of the present invention, among the plurality of electrodes, the electrode provided on the backmost substrate is a light reflecting electrode capable of reflecting received light. .

According to such a configuration, the light transmitted through the plurality of liquid crystal layers is reflected by the light reflecting electrode. When the electrode provided on the substrate on the bottom layer is, for example, a transparent electrode, loss of light occurs when light passes through this electrode, but if this electrode is a light reflecting electrode, , Such light loss can be prevented.

In another preferred embodiment of the present invention, a white light-reflecting layer is provided on the back surface of the backmost substrate.

According to such a configuration, the light transmitted through the gap between the light reflecting electrodes can be reflected by the light reflecting layer. Since the light reflecting layer is white, the light reflectance of the light reflecting layer can be increased. Accordingly, it is possible to increase the amount of light transmitted through a plurality of liquid crystal layers and then reflected on the front of the plurality of liquid crystal layers, which is more preferable for increasing the brightness of the liquid crystal display screen.

Other features and advantages of the present invention will become more apparent from the following description of embodiments of the present invention.

[0027]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be specifically described below with reference to the drawings.

FIGS. 1 to 7 show an example of a liquid crystal display device according to the present invention. Liquid crystal display device A of the present embodiment
Is configured as a three-layer GH (Gest-Host) mode reflective color liquid crystal display device. 1, the liquid crystal display device A includes a liquid crystal panel 1, first and second flexible cables 2A and 2B, and first and second driver IC chips 3A and 3B. It is provided and comprised.

2 and FIG. 3, the liquid crystal panel 1 includes a plurality of rectangular transparent substrates 10A to 10F stacked in the thickness direction and three liquid crystal layers 11
C, 11M, and 11Y. The plurality of substrates 10A to 10F are made of glass or synthetic resin having high transparency, and the uppermost and lowermost substrates 10A to 10F are provided.
A and 10F are thicker than each of the substrates 10B to 10E between them. Specifically, each of substrates 10A and 10F has a thickness of, for example, about 0.5 mm, while each of substrates 10B to 10E has a thickness of, for example, about 50 μm (however, in the drawings, such a case is assumed). Not shown in the ratio). Note that the substrates 10B, 10
C and each of the substrates 10D and 10E can be configured as one substrate, and such a configuration may be employed in the present invention.

Each of the liquid crystal layers 11C, 11M and 11Y is of a guest-host type constituted by using liquid crystal mixed with a dichroic dye, and comprises a plurality of substrates 10A to 10F.
In the thickness direction. Liquid crystal layer 11C
Is a cyan liquid crystal layer, and a nematic type liquid crystal in which a dye that mainly absorbs red light is mixed is used for the substrate 10A and the substrate 1A.
0B. The liquid crystal layer 11M is a magenta liquid crystal layer, and is formed of a nematic liquid crystal mixed with a dye that mainly absorbs green light.
It is configured by being enclosed between C and the substrate 10D. The liquid crystal layer 11Y is a yellow liquid crystal layer, and is configured by sealing a nematic liquid crystal mixed with a dye that mainly absorbs blue light between the substrate 10E and the substrate 10F. A sealing member 19 is used for enclosing the liquid crystal. The three types of liquid crystal layers in the present embodiment are:
Cyan, magenta, and yellow are arranged in order from the outermost layer to the lowermost layer, but the present invention is not limited to this.
The order of lamination of these liquid crystal layers can be freely changed in various ways.

As a driving method of the liquid crystal panel 1, a simple matrix method is adopted, and a plurality of substrates 10A, 1
A plurality of horizontal electrodes (common electrodes) 12C, 12M, and 12Y are formed on the downward surface of OC and 10E. A plurality of vertical electrodes (segment electrodes) 13C, 13M, and 13Y are provided on the upward surfaces of the substrates 10B, 10D, and 10F. These electrodes are the lowermost electrode 1
Except for 3Y, it is a transparent electrode made of, for example, an ITO film. The electrode 13Y is a light reflection electrode made of a metal film having a high light reflectance such as aluminum or silver. In addition, a light reflection layer 18 made of a white sheet material or a coating film is provided on the back surface of the substrate 10F. Liquid crystal layers 11C, 11M, 11Y are provided on the plurality of substrates 10A to 10F.
An alignment film 17 for imparting a twist to each liquid crystal molecule is also provided.

As shown in FIG. 4, the plurality of vertical electrodes 13C have a band shape extending in a predetermined direction and arranged in parallel, and one end in the longitudinal direction thereof is connected to the liquid crystal display screen area ( It is drawn out from the liquid crystal enclosing area (S). The extended portion is the terminal portion 14C for the segment wiring, and the plurality of terminal portions 14C correspond to the substrate 10 corresponding to a part of the first side edge 1a of the liquid crystal panel 1.
B is provided on the side edge portion 10Ba. Other vertical electrode 13
M and 13Y have the same configuration as that of the vertical electrode 13C, and the terminal portions 14M and 14Y for segment wiring, which are formed by drawing one end in the longitudinal direction outside the liquid crystal display screen area S, It is provided on each of the side edges 10Da and 10Fa of the substrates 10D and 10F corresponding to a part of the first side edge 1a of the liquid crystal panel 1.

In the first side edge portion 1a of the liquid crystal panel 1, one side edge portion of the plurality of substrates 10A to 10F is structured to be displaced in a total of four steps. More specifically, as is well shown in FIGS. 2 and 5, in the first side edge 1a of the liquid crystal panel 1, the side edges of the substrates 10B and 10C are larger than those of the substrate 10A. Suitable dimensions L
Only one protrudes outward. In addition, these substrates 10B,
The side edges of the boards 10D and 10E protrude outward by an appropriate dimension L2 than the boards 10D and 10C, and the side edges of the board 10F have an appropriate dimension L3 than the boards 10D and 10E. It protrudes further outward. With such a structure, the terminal portions 14C for the segment wiring,
14M and 14Y are sequentially displaced in a certain direction,
In addition, the plurality of substrates 10A to 10F are arranged in an upwardly extending state protruding outside.

As is clearly shown in FIG. 4, the plurality of horizontal electrodes 12C extend in a direction perpendicular to the vertical electrodes 13C, 13M, and 13Y, and are arranged in parallel. It is drawn out of the liquid crystal display screen area S. The extended portion is a terminal portion 15C for common wiring, and the plurality of terminal portions 15C correspond to a part of the second side edge portion 1b of the liquid crystal panel 1.
0A is provided on the side edge 10Ab. Other horizontal electrode 1
The 2M and 12Y also have the same configuration as the horizontal electrode 12C, and are formed by drawing one end in the longitudinal direction of the liquid crystal display screen region S outside as shown in FIG. Terminal part 15M, 1 for common wiring
5Y is provided on the side edges 10Cb and 10Eb of the substrates 10C and 10E corresponding to the second side edges 1b of the liquid crystal panel 1, respectively.

The second side edge 1b of the liquid crystal panel 1 also has a structure in which the side edges of the substrates 10A to 10F are displaced in a total of four steps. However, the form of the displacement is different from that of the first side edge 1a of the liquid crystal panel 1. More specifically, as best seen in FIGS. 3 and 5, the second
At the side edge 1b of the substrate 10A,
The side edges of B and 10C are located closer to the inside of the liquid crystal panel 1 by an appropriate dimension L4. In addition, the substrates 10D and 10E have their side edges positioned closer to the inside of the liquid crystal panel 1 by an appropriate dimension L5 than the substrates 10B and 10C, and the substrate 10F has a smaller edge than the substrates 10D and 10E. On the other hand, the side edge portion is located further inward of the liquid crystal panel 1 by an appropriate dimension L6. With such a structure, the terminal portions 15C, 15M, 1
5Y are sequentially displaced in a certain direction, and are arranged in a downward state protruding outside between each of the plurality of substrates 10A to 10F.

In FIG. 1 and FIG. 2, the first flexible cable 2A is formed by forming a wiring pattern 20A made of copper foil or the like on a thin film of an electrically insulating material such as polyimide or other resin. It is rich in flexibility. This first flexible cable 2
A first driver IC chip 3 is provided on one side (downward side) of A.
A is mounted, and the wiring pattern 20A is electrically connected to a plurality of electrodes (not shown) of the driver IC chip 3A. As is well shown in FIG.
A is composed of three types of wiring portions 21a to 21c.
These three types of wiring portions 21a to 21c have different lengths, and have terminal portions 22a at their tips.
22c are arranged corresponding to the arrangement of the terminal portions 14C, 14M, and 14Y for the segment wiring of the liquid crystal panel 1. In the present embodiment, the terminal portions 14C, 14M, and 14Y for the segment wiring and the wiring pattern 2
The terminal portions 22a to 22c of 0A are connected to the wiring portions 21a to 21a.
It is offset by a predetermined dimension in a direction orthogonal to the direction in which 21c extends.

As best shown in FIG. 2, the distal end of the first flexible cable 2A is bent stepwise corresponding to the first side edge 1a of the liquid crystal panel 1. Thus, the plurality of terminal portions 22a to 22c face the segment portions 14C, 14M, and 14Y for the segment wiring, and are electrically connected to these. The conductive connection uses an anisotropic conductive member 4A. The anisotropic conductive member 4A enables electrical conduction in the thickness direction of the anisotropic conductive member 4A, but disables electrical conduction in a direction perpendicular to the thickness direction. By using this anisotropic conductive member 4A, it is possible to prevent an electric short circuit from occurring between adjacent terminal portions.

The first driver IC chip 3A has a built-in circuit for controlling the application of voltages to the plurality of vertical electrodes 13C, 13M, and 13Y, and is a one-chip device. Of course, a driver may be configured by combining a plurality of IC chips. The first driver IC chip 3A is capable of serially switching and controlling the voltage application to the plurality of wiring portions 21a to 21c shown in FIG. 6 in a certain order. , N1 in FIG.
Voltage application control is performed in the order of n2, n3, and n4.

In FIGS. 1 and 3, the second flexible cable 2B is the first flexible cable 2A.
It is made of the same material and has high flexibility, and has a wiring pattern 20B. A second driver IC is provided on one surface (upward surface) of the second flexible cable 2B.
The chip 3B is mounted, and the wiring pattern 20B is electrically connected to a plurality of electrodes (not shown) of the driver IC chip 3B. As is often shown in FIG. 7, the plurality of wiring portions 23 constituting the wiring pattern 20 </ b> B are linearly extending in a layout corresponding to the common wiring terminal portions 15 </ b> C, 15 </ b> M, and 15 </ b> Y of the liquid crystal panel 1. Terminal portion 23a.

As shown in FIG. 3, the distal end of the second flexible cable 2 B is bent stepwise corresponding to the second side edge 1 b of the liquid crystal panel 1. Thus, the plurality of terminal portions 23a are opposed to the common wiring terminal portions 15C, 15M, and 15Y, and are conductively connected to these terminal portions via the anisotropic conductive member 4B. In this connection, three common wiring terminals 15C, 15M, and 15Y corresponding to each other are electrically connected to one terminal 23a.
The anisotropic conductive member 4B is the same as the anisotropic conductive member 4 described above.
It is the same as A.

The second driver IC chip 3B has a built-in circuit for controlling the application of voltages to the plurality of horizontal electrodes 12C, 12M, and 12Y, and is a one-chip device. This second driver IC chip 3B
A voltage is applied to each of the plurality of horizontal electrodes 12C, 12M, and 12Y in a fixed order. For example, reference numerals n10 and n11 are applied to the plurality of wiring portions 23 shown in FIG. , N12, and n13 are applied in this order.

Next, the operation of the liquid crystal display device A will be described.

First, when driving the liquid crystal display device A, a voltage is sequentially applied to each of the plurality of horizontal electrodes 12C, 12M, and 12Y under the control of the second driver IC chip 3B. . At this time, the control of the first driver IC chip 3A causes the plurality of vertical electrodes 13C,
A voltage is selectively applied to each of 13M and 13Y. Thereby, the three types of liquid crystal layers 11C, 1
1M and 11Y can be driven simultaneously. For example, three types of liquid crystal layers 11C, 11M, 11Y
When only the cyan liquid crystal layer 11C of the portion corresponding to one pixel is driven (voltage applied state), the cyan liquid crystal layer 11C has a complementary color of cyan of the light traveling from the front of the liquid crystal panel 1. Transmits certain red light. On the other hand, magenta and yellow liquid crystal layers 11M and 11Y
Absorb light of their complementary colors, green and blue, because no voltage is applied. As a result, the light reflected on the front of the liquid crystal panel 1 becomes red light. With such a principle, the liquid crystal display device A can display a full-color image, and as described above, does not require a polarizing plate or a color filter, so that the brightness of the display image can be increased. .

Light transmitted through the three types of liquid crystal layers 11C, 11M, and 11Y is reflected by the electrode 13Y to the front of the liquid crystal panel 1. If the electrode 13Y is assumed to be a transparent electrode, light will reciprocate through the electrode 13Y, causing a loss of light at that time. If the light is reflected by the electrode 13Y, such a light is lost. Light loss can be prevented. Further, light transmitted through a portion where the electrode 13 </ b> Y is not formed is appropriately reflected by the light reflection layer 18 to the front of the liquid crystal panel 1. Light reflection layer 1
8 is white, so that its light reflectance can be high. Therefore, the brightness of the display image can be further increased. Unlike the present embodiment, when a white light reflecting layer is used in a liquid crystal display device using a polarizing plate, a problem occurs in that the light oscillation direction is disturbed by scattering and reflection of light by the light reflecting layer. In the liquid crystal display device A of the present embodiment that does not use the same, there is no problem even if the white light reflecting layer 18 is used.

As described above, in the liquid crystal display device A, the thicknesses of the substrates 10B to 10E that partition the three types of liquid crystal layers 11C, 11M, and 11Y in the thickness direction thereof are reduced. Therefore, when a color image is displayed on the liquid crystal panel 1 and viewed from obliquely forward of the liquid crystal panel 1, the pixels displayed by the three types of liquid crystal layers 11C, 11M, and 11Y appear to be displaced from each other. It is possible to make it not. Therefore, it is preferable to improve the quality of the display image. On the other hand, the liquid crystal panel 1
Since the thicknesses of the outermost and backmost substrates 10A and 10F are increased, the mechanical strength of the entire liquid crystal panel 1 can be appropriately secured.
Can be prevented from easily occurring.

As will be understood from the configuration described above, the liquid crystal display device A of the present embodiment requires, during the assembling work, the terminal portions 14C and 14C for the segment wiring of the liquid crystal panel 1.
14M, 14Y and terminal 15C, 1 for common wiring
First and second driver IC chips 3 on 5M and 15Y
A and 3B need to be connected by wiring. However, this wiring work is performed by the first and second flexible cables 2A,
This can be easily performed by bending 2B stepwise. Also, three types of vertical electrodes 13C, 13
The voltage application to the M and 13Y and the voltage application to the three types of horizontal electrodes 12C, 12M and 12Y are controlled by one driver IC chip 3A and 3B, respectively. Total number is also reduced. Furthermore, two driver ICs
The total number of flexible cables 2A, 2B used for wiring connection between the chips 3A, 3B and the liquid crystal panel 1 is also small. Accordingly, the liquid crystal display device A of the present embodiment is reduced by reducing the cost of parts and facilitating the assembling work.
Can be manufactured at a low cost.

FIGS. 8 to 10 show another embodiment of the present invention. In these drawings, the same or similar elements as those in the above embodiment are denoted by the same reference numerals as those in the above embodiment.

The liquid crystal display device Aa of the embodiment shown in FIG.
Are three types of liquid crystal layers 11C, 11M, and 11 of cyan, magenta, and yellow as liquid crystal layers of the liquid crystal panel 1A.
In addition to Y, the configuration further includes a black liquid crystal layer 11Bk. This black liquid crystal layer 11Bk
The liquid crystal panel 1A is for displaying black pixels.
Liquid crystal mixed with a black dichroic dye is sealed between the substrates 10G and 10H. Also for the black liquid crystal layer 11Bk, a plurality of vertical electrodes 1
3Bk and horizontal electrodes 12Bk are provided correspondingly.

In the liquid crystal display device Aa, as compared with the liquid crystal display device A of the above embodiment, the terminal portion 14B for the segment wiring for the black liquid crystal layer 11Bk is used.
k and a terminal portion (not shown) for common wiring are further added. Therefore, in the liquid crystal display device Aa, for example, the side edge of each substrate corresponding to the first side edge 1a of the liquid crystal panel 1A is one step larger than the liquid crystal display device A of the above-described embodiment, that is, a total of five steps. , The four types of terminal portions 14C, 14M, 14Y, and 14Bk for the segment wiring are displaced in a certain direction with respect to each other, and are exposed to the outside from between the respective substrates. It has been.

Also in this liquid crystal display device Aa, the first flexible cable 2A is bent in a stepwise manner to form four types of terminal portions 14C, 14M, 14Y, 14A.
Bk for each of the first driver IC chips 3A
Can be easily wired and connected. The first driver IC chip 3A in the present embodiment has four types of liquid crystal layers 1A.
1C, 11M, 11Y, and 11Bk, and the first flexible cable 2A has four types of terminal portions 14C, 14M, 14Y, and 14B.
Of course, it has the wiring pattern 20A corresponding to Bk. If the liquid crystal panel 1A is provided with the black liquid crystal layer 11Bk, it is possible to clearly display black pixels using the liquid crystal layer 11Bk. In addition,
The black liquid crystal layer 11Bk does not necessarily need to be provided below the other three types of liquid crystal layers 11C, 11M, and 11Y. As understood from the present embodiment, in the present invention, the specific number of liquid crystal layers is not limited. The present invention, if the liquid crystal layer has a multi-layer structure,
It can be applied regardless of the specific type of the liquid crystal layer.

In the configuration shown in FIG.
B is configured as a so-called two-screen split drive type. In the liquid crystal panel 1B, each vertical electrode 13C is divided into two parts by being divided at the center in the longitudinal direction. Thereby, the liquid crystal panel 1
The display screen of B is divided into two screens Sa and Sb. The terminal portion 14C for the segment wiring is formed by extending one end of each of the divided vertical electrodes 13C, and corresponds to a part of each of the two side edges 1a and 1c of the liquid crystal panel 1B. 10B are provided at two side edges. The vertical electrodes 13M and 13Y provided on the substrates 10D and 10F also have the same configuration as the vertical electrode 13C, and have their terminal portions 14M and 14M for segment wiring.
14Y is provided on the two side edges of the substrates 10D and 10F corresponding to a part of the two side edges 1a and 1c of the liquid crystal panel 1B.

In this embodiment, the substrates 10A to 10A are provided at both of the two side edges 1a and 1c of the liquid crystal panel 1B.
The side edge of OF is displaced stepwise. And
In any of these two side edges 1a, 1c, the terminal portions 14C, 14M, 14Y for the segment wiring are displaced in a fixed direction, and are provided so as to protrude outside from between the substrates 10A to 10F. It has been. According to such a configuration, the wiring connection of the driver to the segment wiring terminal portions 14C, 14M, and 14Y separately provided at two places can be easily performed.

In the configuration shown in FIG. 10, the liquid crystal panel 1C is of the active matrix type.
The electrode (common electrode) 12C provided on the substrate 10A of the liquid crystal panel 1C has a rectangular planar shape and shape similar to the liquid crystal display screen. Substrate 10C, 1
OE is also provided with a similar common electrode. On the other hand, the plurality of segment electrodes 13C provided on the substrate 10B have a small rectangular shape corresponding to one pixel, and are arranged in a matrix. Each segment electrode 13C has a thin film transistor (TFT: Thin F) for holding a voltage applied to one liquid crystal cell.
ilm Transister (not shown)) is provided. A terminal portion 14C for segment wiring and a terminal portion 15C for common wiring for selectively applying a voltage to the plurality of segment electrodes 13C are provided on two side edges of the substrate 10B. The segment electrodes provided on the substrates 10D and 10F are the same as the segment electrodes 13C, and the segment wiring terminal portions 14M and 1 corresponding to those electrodes are provided.
4Y and the terminals 15M and 15Y for the common wiring are provided on two side edges of the substrates 10D and 10F.

In this embodiment, the substrate 10 is provided at both of the two side edges 1a and 1b of the liquid crystal panel 1B.
The side edges of A to 10F are displaced stepwise. In both of these two side edges 1a and 1b, the terminal portions 14C, 14M and 14Y for the segment wiring are provided.
And the terminal portions 15C, 15M, and 15Y for common wiring,
It is configured to be displaced in a certain direction and protrude outside from between the substrates 10A to 10F. According to such a configuration, a plurality of terminal portions 14C, 14M, 14Y, 15C, 15M,
The wiring connection of the driver to 15Y can also be easily performed. As described above, the present invention is not limited to the simple matrix type, but can be applied to an active matrix type, and the driving method of the liquid crystal is not limited.

The specific structure of each part of the liquid crystal display device according to the present invention is not limited to the above-described embodiment, and various design changes can be made.

For example, in the embodiment shown in FIGS. 1 to 7, the two side edges of each of the plurality of substrates of the liquid crystal panel 1 are formed in a step-like manner so that the terminal portions 14C and 14M for the segment wiring are formed. , 14Y and terminal 15 for common wiring
Although each of C, 15M, and 15Y protrudes from between the substrates, the present invention is not limited to this. In the present invention, for example, since only one side edge of each of the plurality of substrates of the liquid crystal panel 1 is formed in a stepped shape, the terminal portions 14C, 14M, 1 for the segment wiring are formed.
Only one of the 4Y and the common wiring terminal portions 15C, 15M, and 15Y may be displaced in a certain direction so as to protrude from between the substrates. Even with such a configuration, the wiring connection of the driver to one of the terminal portions 14C, 14M, and 14Y for the segment wiring and the terminal portions 15C, 15M, and 15Y for the common wiring as compared with the conventional configuration. This is because work is facilitated. As described above, in the present invention, at least one side edge of each of the plurality of substrates of the liquid crystal panel is displaced in a stepwise manner, so that a plurality of predetermined terminal portions protrude from between the plurality of substrates. In addition, it is only necessary that the array be displaced in a certain direction.

In the liquid crystal display device according to the present invention,
As a means for connecting the driver to the wiring terminal of the liquid crystal panel, other wiring connection members may be used instead of the flexible cable. Further, as the driver, it is preferable to use a one-chip driver IC chip, but the present invention is not limited to this.

In the present invention, as a means for performing color display, a red-liquid crystal layer, a green liquid crystal layer, and a green liquid crystal layer are used instead of the means using a cyan liquid crystal layer, a magenta liquid crystal layer, and a yellow liquid crystal layer mixed with a dichroic dye. Means using a liquid crystal layer of a liquid crystal layer and a blue liquid crystal layer can also be employed.

[Brief description of the drawings]

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

FIG. 2 is a sectional view taken along line II-II of FIG.

FIG. 3 is a sectional view taken along the line III-III of FIG. 1;

FIG. 4 is an exploded perspective view of a liquid crystal panel included in the liquid crystal display device shown in FIG.

FIG. 5 is an exploded perspective view of the liquid crystal display device shown in FIG.

FIG. 6 is a plan view of a principal part showing a configuration of a first flexible cable constituting the liquid crystal display device shown in FIG. 1 and a terminal portion of a liquid crystal panel corresponding thereto.

FIG. 7 is a plan view of a principal part showing a configuration of a second flexible cable constituting the liquid crystal display device shown in FIG. 1 and a terminal portion of the liquid crystal panel corresponding thereto.

FIG. 8 is a sectional view of a main part showing another example of the liquid crystal display device according to the present invention.

FIG. 9 is an exploded perspective view showing another example of the liquid crystal panel constituting the liquid crystal display device according to the present invention.

FIG. 10 is an exploded perspective view showing another example of the liquid crystal panel constituting the liquid crystal display device according to the present invention.

FIG. 11 is an explanatory view schematically showing a conventional technique.

[Explanation of symbols]

 A, Aa Liquid crystal display device 1, 1A to 1C Liquid crystal panel 2A First flexible cable 2B Second flexible cable 3A First driver IC chip (driver) 3B Second driver IC chip (driver) 10A to 10F Substrate 11C , 11M, 11Y, 11Bk Liquid crystal layer 12C, 12M, 12Y Horizontal electrode 13C, 13M, 13Y Vertical electrode 14C, 14M, 14Y Terminal part for segment wiring 15C, 15M, 15Y Terminal part for common wiring

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 2H088 HA12 HA18 HA21 JA06 MA20 2H089 HA31 QA12 RA06 TA12 TA15 TA17 2H091 FA02Y FA08X FA08Z FA14Z HA08 LA30 2H092 GA45 GA50 LA06 NA27 PA08 PA11 QA08

Claims (9)

[Claims] 1. A liquid crystal device comprising: a plurality of liquid crystal layers laminated in a thickness direction between a plurality of substrates laminated in a thickness direction; and a voltage applied to each liquid crystal of the plurality of liquid crystal layers. A liquid crystal display device, comprising: a liquid crystal panel provided with a plurality of electrode wiring terminal portions provided on any of a plurality of side edges of the plurality of substrates; The edge portion is displaced in a stepwise manner, so that the plurality of terminal portions protrude from between the plurality of substrates and are arranged so as to be displaced from each other in a certain direction. Display device. 2. A light reflecting means capable of reflecting light transmitted through the plurality of liquid crystal layers from the front of the liquid crystal panel toward the front of the liquid crystal panel. 2. The liquid crystal display according to claim 1, wherein there are three types of cyan liquid crystal layer, magenta liquid crystal layer and yellow liquid crystal layer mixed with a dichroic dye, or three types of red-liquid crystal layer, green-liquid crystal layer and blue-liquid crystal layer. Liquid crystal display device. 3. The liquid crystal display device according to claim 2, wherein the plurality of liquid crystal layers further include a black liquid crystal layer. 4. It further comprises a driver for driving the plurality of liquid crystal layers, and a flexible cable on which the driver is mounted and which has a wiring pattern for achieving conduction with the driver. Since the flexible cable is bent into a shape corresponding to the stepped side edge of the plurality of substrates, the flexible cable is electrically connected to the plurality of terminals provided on the side edge. The liquid crystal display device according to claim 1, wherein: 5. A plurality of terminal portions for common wiring for switching voltage application to the plurality of electrodes in a scanning line arrangement direction, and a voltage application to the plurality of electrodes. And a plurality of terminal portions for segment wiring for switching the scanning line in the direction in which the scanning lines extend, and a common driver is electrically connected to the plurality of terminal portions for common wiring. The liquid crystal display device according to any one of claims 1 to 4, wherein the liquid crystal display device is configured as described above. 6. A common driver is electrically connected to the plurality of terminal portions for the segment wiring, and the driver applies a voltage to respective electrodes of the plurality of liquid crystal layers. 6. The apparatus according to claim 5, wherein switching control is performed in a direction in which the scanning line extends.
3. The liquid crystal display device according to 1. 7. The substrate according to claim 1, wherein, of the plurality of substrates, two substrates located in the outermost layers on the front and back sides have a thickness greater than other substrates located therebetween. The liquid crystal display device as described in the above. 8. The electrode according to claim 1, wherein an electrode provided on the substrate on the rearmost layer among the plurality of electrodes is a light reflection electrode capable of reflecting received light. The liquid crystal display device as described in the above. 9. The liquid crystal display device according to claim 8, wherein a white light-reflecting layer is provided on a rear surface portion of the rearmost substrate.