JP2002072929A - Display device and method of manufacturing for the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a display device which consists of simple constitution, can be manufactured at a low cost and can be made as thin as possible in spite of a type laminated with plural display panels and a method of manufacturing for the same. SOLUTION: This liquid crystal display device is formed by laminating liquid crystal display panels R, G and B having scanning electrodes and signal electrodes for matrix driving of the liquid crystals held between a pair of substrates. The scanning electrodes are connected in series by flexible printed circuit boards 25a and 25b and the connecting segments are bent toward arrows (1) and (2), by which the respective panels are laminated. In this lamination state, scanning drive circuits 27 connected to the respective scanning electrodes and signal drive circuits 17R, 17G and 17B connected to the respective signal electrodes of the respective panels are so arranged as not to overlap on each other.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a display device and a method of manufacturing the same, and more particularly to a display device in which a plurality of display panels are stacked and each pixel is driven in a matrix, and a method of manufacturing the same.

[0002]

2. Description of the Related Art In recent years, various display devices for displaying digitized information such as characters and images as visible information have been researched and developed. In particular, small and thin, energy-saving portable display terminals have been developed. The demand is strong, and good reproducibility of full color is also required.

As such a display device, for example, a reflection type liquid crystal display device utilizing selective reflection of a cholesteric liquid crystal or a chiral nematic liquid crystal is known. In this type of liquid crystal display device, full-color display can be realized by stacking three liquid crystal display panels for red display, green display, and blue display.

As described above, there is a demand for a liquid crystal display device including a multi-layer liquid crystal display element formed by laminating a plurality of display panels, which is also required to be smaller and thinner. However, a conventional liquid crystal display device including a multilayer liquid crystal display element necessarily includes a large number of driving circuit components such as a driving IC for driving each liquid crystal display panel, and is not sufficiently reduced in size and thickness. Met.

Accordingly, an object of the present invention is to provide a display device which has a simple structure, can be manufactured at a low cost, and can achieve a thickness as small as possible even if it is a type in which a plurality of display panels are stacked, and a method of manufacturing the same. It is in.

[0006]

In order to achieve the above object, a first display device according to the present invention comprises a plurality of display panels each having a first electrode and a second electrode, wherein the first electrodes are connected in series. A plurality of display panels are stacked by being connected and the connection portion is bent, and a first drive circuit connected to a first electrode of any one of the display panels and a display electrode on a second electrode of each of the display panels A plurality of second drive circuits connected to each panel, and the second drive circuits are arranged at positions not overlapping with each other.

In a second display device according to the present invention, the first electrodes of a plurality of display panels each having a first electrode and a second electrode are connected in series, and the connection portion is bent to form a plurality of display panels. Display panels are stacked, including a first drive circuit connected to a first electrode of any of the display panels, and at least one second drive circuit connected to a second electrode of each of the display panels, The first driving circuit and the second driving circuit are arranged at positions not overlapping each other.

In the first and second display devices having the above configuration, the first electrodes of each display panel are connected in series and are commonly driven by the first drive circuit, so that the configuration is simplified. And the manufacturing cost is reduced. In particular, in the first display device, since a plurality of second driving circuits are arranged so as not to overlap with each other, a thin structure can be realized even in a stacked type. In the second display device,
Since the first drive circuit and the second drive circuit are arranged so as not to overlap with each other, even a stacked type can be configured to be thin. Further, in the second display device, a plurality of second drive circuits are provided, each second drive circuit is connected to each second electrode of each display panel, and the second drive circuits are arranged at positions not overlapping with each other. May be.

In the first and second display devices,
If the first electrode is a scanning electrode and the second electrode is a signal electrode, the first electrode of each display panel can be commonly driven by a single first driving circuit. In addition, if the connection portion of each display panel is formed of a flexible wiring board, bending is easy, and reliability of electrical contact can be secured.

Further, three or more display panels may be stacked as a display device, or two display panels may be stacked.

Further, various forms can be adopted for bending a plurality of display panels connected in series. For example, the display panel may be folded so that the display panel at one end is located inside, or each connection portion may be sequentially folded in the opposite direction and stacked. In addition, the second drive circuit may be disposed at the same side end of each display panel, or at least one second drive circuit may be located at a different end of the display panel from the other second drive circuits. May be arranged.

On the other hand, a first manufacturing method of a display device according to the present invention is characterized in that a connecting portion of a plurality of display panels each having a first electrode and a second electrode and having the first electrode connected in series is bent. Stacking display panels, connecting a first drive circuit to a first electrode of one of the liquid crystal display panels, and connecting a plurality of second drive circuits to a second electrode of each display panel. Arranging the second drive circuits at positions not overlapping each other.

In a second method of manufacturing a display device according to the present invention, a plurality of display panels each including a first electrode and a second electrode and bending a connection portion of a plurality of display panels having the first electrode connected in series are provided. Stacking display panels, connecting a first drive circuit to a first electrode of one of the display panels, connecting at least one second drive circuit to each display panel, Arranging the circuit and the second drive circuit at positions that do not overlap each other.

In the first and second manufacturing methods having the above-described structure, the driving circuit for the first electrode of each display panel is shared, and the connection portion is bent and laminated, so that the production is easy. Therefore, cost reduction is achieved. In particular, in the first manufacturing method, the plurality of second drive circuits are arranged so as not to overlap with each other, so that even a stacked type can be configured to be thin. In the second manufacturing method, the first drive circuit and the plurality of second drive circuits are arranged so as not to overlap with each other. Further, in the second manufacturing method, the plurality of second drive circuits are respectively connected to the second electrodes of each display panel, and the first drive circuit and each of the second drive circuits are connected.
The drive circuits may be arranged at positions not overlapping each other.

In the manufacturing method according to the present invention, the connection portion may be bent before connecting the first and / or second drive circuit, or alternatively, the first and / or second drive circuit may be connected.
After connecting the drive circuit, the connection portion may be bent.
Further, if the first and second drive circuits are respectively connected by a flexible wiring board, and the wiring board is bent to the rear side of the display panel after the connection, the reliability of the electrical contact can be secured, and the bending step can be performed. Easy.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of a display device and a method of manufacturing the same according to the present invention will be described with reference to the accompanying drawings.

Hereinafter, a reflection type liquid crystal display device using cholesteric liquid crystal will be described as an example of a display device driven by simple matrix driving.

(Basic Configuration of Liquid Crystal Display Element, See FIG. 1) FIG. 1 shows a basic configuration of a multilayer liquid crystal display element used in the liquid crystal display device according to the present embodiment. In this multilayer liquid crystal display element, a red display panel R for performing display by switching between a red selective reflection and a transparent state is disposed on the light absorbing layer 50, and a green selective reflection and a transparent state are switched thereon. A green display panel G for performing display is stacked, and a blue display panel B for performing display by switching between blue selective reflection and a transparent state is further stacked thereon.

Each of the display panels R, G, and B has a liquid crystal 51 sandwiched between transparent substrates 11 and 21 on which transparent electrodes 12 and 22 are formed, respectively. The display panel R has a cholesteric liquid crystal 51 _R for red display, the display panel G has a cholesteric liquid crystal 51 _G for green display, and the display panel B
Cholesteric liquid crystal 51 _B for blue display is held on. The electrodes 12, 22 and the substrates 11, 21 are also given subscripts _B , _G , _R for each of the display panels R, G, B.

A seal wall 23 for sealing the liquid crystal 51 is provided between the substrates 11 and 21. Although not shown, a spacer for determining a gap between the substrates 11 and 21 is arranged.

As the substrates 11 and 21, for example, a transparent resin film can be used. Examples of the material of the transparent resin film include polyarylate resin, polyether sulfone resin, polycarbonate resin, norbornene resin, amorphous polyolefin resin, and modified acrylate resin.

Reference numeral 52 denotes a resin structure provided as needed, which is adhered to the upper and lower substrates 11 and 21 to prevent the gap between the substrates 11 and 21 from widening. In addition, a thin film such as an alignment control film or an insulating film may be provided on the electrode forming surfaces of the substrates 11 and 21 as needed.

The electrodes 12 and 22 provided on each of the display panels R, G and B are composed of a plurality of strip electrodes arranged in parallel at predetermined intervals, and the directions of the strip electrodes are perpendicular to each other. They face each other in the direction.
The display is performed by applying a voltage to the liquid crystal by these upper and lower strip electrodes.

In the multi-layer liquid crystal display device shown in FIG. 1, the electrode 12 is a signal electrode and the electrode 22 is a scanning electrode, and display is performed on each signal electrode while a selection voltage is applied to a predetermined scanning electrode. By applying a signal voltage corresponding to the image data to be displayed, each pixel arranged on the scanning electrode is displayed. Then, display is performed by applying a voltage to each signal electrode while sequentially applying a selection voltage to each scanning electrode (matrix driving).

The liquid crystal 51 contained in each of the liquid crystal display panels R, G, and B is prepared so as to exhibit a cholesteric phase at room temperature by itself or to exhibit a cholesteric phase at room temperature by adding a chiral material to a nematic liquid crystal. A chiral nematic liquid crystal that selectively reflects visible light of a specific wavelength from a transparent state (focal conic state) that transmits visible light in response to a voltage applied between the upper and lower electrodes 12 and 22. The state is switched from the selective reflection state to the transparent state, or vice versa.

For example, by setting the display panel B and the display panel G in a transparent state and the display panel R in a selective reflection state, a red display can be performed. In addition, yellow display can be performed by setting the display panel B to the transparent state and setting the display panel B and the display panel R to the selective reflection state. Similarly, the state of each of the display panels R, G, and B is changed to red or red by appropriately selecting the transparent state and the selective reflection state.
Green, blue, white, cyan, magenta, yellow, and black can be displayed. Further, by selecting a state in which the focal conic state and the planar state are mixed as the state of each of the display panels R, G, and B, a halftone is displayed. Therefore, full-color display can be performed.

When each of the display panels R, G, and B can be driven by the same or substantially the same voltage, one of the electrodes can be shared by the display panels. Therefore, in this multilayer display element, the scanning electrode 2 of each display panel is used.
2 are electrically connected to share a common scanning electrode (FIG. 1).
Dotted line). As a result, as described later, the scan electrodes 22 _R , 22 _G , and 22 _B of each of the display panels R, G, and B are connected to one common scan drive circuit.

In order to make the driving voltage values of the display panels R, G, B close, the composition of the liquid crystal composition, the thickness of the liquid crystal layer,
What is necessary is just to change the kind and thickness of a thin film, such as an insulating film and an orientation control film.

(Example 1 of connection panel production, see FIGS. 2 to 5)
First, as shown in FIG. 2, a large number of signal electrodes 12 are formed in parallel on the surface of an upper substrate 11 made of a transparent resin sheet. The signal electrode 12 is a transparent electrode such as an ITO or Nesa film, is formed by a sputtering method, a vacuum evaporation method, or the like, and is formed at predetermined intervals by etching.

On the other hand, the lower substrate 2 made of a transparent resin sheet
A large number of scanning electrodes 22 are formed in parallel on one surface. The scanning electrode 22 is also a transparent electrode similar to the signal electrode 12,
Both are formed in directions crossing each other. Thereafter, if necessary, an insulating film, an orientation control film, and the like are formed on the electrode surface of the substrate. Further, a resin sealing wall 23 is formed on the lower substrate 21 so as to form an endless rectangular wall portion for sealing the liquid crystal material. Then, spacers are sprayed on at least one of the substrates. Further, a resin structure is provided on at least one substrate as required.

Next, the two substrates 11 and 21 are bonded together in a state where the liquid crystal is filled in the portion surrounded by the seal wall 23. FIG. 3A shows a state in which the panels are bonded together, where R is a panel filled with liquid crystal for displaying red, G is a panel filled with liquid crystal for displaying green, and B is a panel filled with liquid crystal. 2 shows a panel filled with liquid crystal. Thereafter, as shown in FIG. 3B, the space between the panels of the upper substrate 11 is cut out to expose the scanning electrodes 22.

Next, as shown in FIG.
1 to cut out the scan electrodes 22 between R and G, and between G and B. Reference numeral 24 denotes a slit formed by punching the lower substrate 21. Further, the substrate 1
4B, the signal electrodes 12 are exposed by cutting the space between the adjacent same color display panels on the lower substrate 21 as shown in FIG. 4B. In addition, since the resin film substrates are used as the substrates 11 and 21, they can be easily cut off.

Next, as shown in FIG. 5A, each of the scanning electrodes 22 exposed by using flexible printed circuit boards (FPC) 25a and 25b, which are strip-shaped flexible wiring boards, is electrically connected. Connection. Thus, the liquid crystal display panels R, G, and B are connected in series. Further, as shown in FIG.
, A set of display panels R, G, B is cut out. In addition, a light absorbing layer is provided in an appropriate step on the rear surface of the liquid crystal display panel (display panel R in this example) located on the rearmost side as viewed from the observation side.

The above panel manufacturing example is composed of three sets of R,
The example where the G and B connected substrates are manufactured by the batch method is shown.
There is no particular limitation on the number of connected substrates manufactured by the batch method.
For example, a multi-cavity configuration of four or more sets may be used. Alternatively, when the thickness of the liquid crystal is different for each of the panels R, G, and B, one panel R, G, and B may be manufactured and connected in series by the FPCs 25a and 25b. The materials of the substrates 11 and 21 and the materials and forming methods of the electrodes 12 and 22 and the seal wall 23 are arbitrary.

(Connection of drive circuit to connection panel and stacking
Form) Here, the signal to the connecting panel manufactured as described above is given.
No. drive circuit, scan drive circuit connection and bending and lamination
And various forms to be completed as a liquid crystal display
explain. In each of the drawings after FIG.
About R, G, B _R,_G,_BIt is indicated by subscripts.

(First bending example, see FIGS. 6 to 9)
Instead, the connection panel shown in FIG. 6 was connected by the FPC 25a.
The lower part of the display panel B, G is indicated by an arrow as shown by the arrow._B,
21_GBend so that they face each other, and then the FPC
The part connected by 25b is indicated by a display panel G as indicated by an arrow.
R upper substrate 11 _G, 11_RFolded so that they face each other
You. When bending, between adjacent display panels
Place an adhesive, adhesive, or adhesive sheet in advance.
And attach each display panel with these
No. Thus, the laminate shown in FIG. 7 is obtained.

In the first bending example, as will be described later with reference to FIG. 8, the connection position of one signal drive circuit is different from the connection position of another signal drive circuit.
Accordingly, the connection panel is formed such that the signal electrode terminal portion of a certain upper substrate (in this example, the upper substrate 11 _B of the display panel B) is formed on the opposite side of the signal electrode terminal portion of the upper substrate of another display panel. To cut out.

Next, as shown in FIG.
7 and the mounting FPC26 bonded to the substrate 21 _B, to electrically connect the scan driving circuit 27 and the scan electrode 22. In addition, F with signal drive circuits 17 _R , 17 _G , and 17 _B attached thereto
The PCs 16 _R , 16 _G , and 16 _B are coupled to the substrates 11 _R , 11 _G , and 11 _B , respectively, and the signal drive circuits 17 _R , 17 _G , and 17 _B and the signal electrodes 12 _R , 12 _G , and 12 _B are electrically connected, respectively. Connect to

Next, as shown in FIG.
Folding the 6 _R, 16 _G, 16 _R and FPC26 the substrate 21 _R side. Thus, it is possible to obtain a stacked type liquid crystal display device including the scanning drive circuit 27 and the signal drive circuits 17 _R , 17 _G , and 17 _B and capable of full-color display. In the stacked state, the signal drive circuits 17 _R , 17 _G , and 17 _B are arranged at positions that do not overlap each other, and
It is located in a position that does not overlap with Thus, the thickness can be reduced as much as possible even in the case of the stacked type.
In addition, by folding the three types of connection panels, a laminated liquid crystal display element can be easily manufactured.

Further, according to the above manufacturing method, a plurality of liquid crystal display panels R, G, B can be handled on one plane, and it is not necessary to perform alignment each time, and the manufacturing can be performed efficiently.

The connecting panel is indicated by arrows ',' in FIG.
, That is, the liquid crystal display panels B and G are folded so that the upper substrates 11 _B and 11 _G face each other, and then the liquid crystal display panels G and R are folded so that the lower substrates 21 _G and 21 _R face each other. In this way, a liquid crystal display device of the same laminated type as described above can be obtained. This point is the same in the following second and third bending examples.
However, in this case, B and R are reversed with respect to FIG.
The FPCs 25a and 25b are bent so that each drive circuit is on the B side, that is, on the opposite side to that shown in FIG.

(Second bending example, see FIGS. 10 and 11)
As shown in FIG. 10, the FPC 26 with the scanning drive circuit 27 attached thereto is
1 _R , and electrically connects the scan drive circuit 27 and the scan electrode 22. Further, the signal drive circuits 17 _R , 17 _G , 1
The FPCs 16 _R , 16 _G , and 16 _B with the 7 _B attached are mounted on the substrate 11.
_R , 11 _G , and 11 _B , respectively, and the signal drive circuit 1
7 _R , 17 _G , and 17 _B are electrically connected to the signal electrodes 12 _R , 12 _G , and 12 _B , respectively.

Next, the portion connected by the FPC 25a is
Lower substrate 21 of display panels B and G as indicated by the mark_B, 21_GIs
Bend to fit, then connect with FPC25b
The drawn part is indicated by arrows on the upper substrate 1 of the display panels G and R.
1_G, 11_RFold them so that they face each other. With this,
As shown in FIG. 11, the scanning drive circuit 27 and the signal drive circuit
17_R, 17_G, 17_BProduct with full color display with
A layer type liquid crystal display device can be obtained. Laminated state
In each of the signal driving circuits 17_R, 17_G, 17 _BAre each other
And the scanning drive circuit 27
It is located in a position that does not overlap with With this, lamination
Even if it is of the type, it is possible to achieve as thin as possible.
In addition, it is easy to bend three types of connecting panels.
A stacked liquid crystal display element can be manufactured.

(Modification 1, see FIG. 12) As shown in FIG. 12, the FPC 16 to which the signal drive circuits 17 _R , 17 _G , and 17 _B are attached is connected to the substrates 11 _R , 11 _G , and 11 _B , respectively. Drive circuits 17 _R , 17 _G , 17 _B and signal electrode 1
2 _R , 12 _G , and 12 _B may be electrically connected. In the first modification, the number of the FPC 16 is one,
Notches 16a and 16b are formed to facilitate bending.

Portion Connected by FPC 25a and FPC
16 as a formation portion of the notch 16a arrows of the display panel B, bent so as to face the lower substrate 21 _B, 21 _G of G, then the connection portions and the notch 16b formed portion in FPC25b The display panels G and R are bent such that the upper substrates 11 _G and 11 _R face each other as shown by arrows. As a result, it is possible to obtain a stacked type liquid crystal display device capable of full-color display including the scanning drive circuit 27 and the signal drive circuits 17 _R , 17 _G , and 17 _B similar to those in FIG. In the stacked state, each of the signal drive circuits 17 _R , 17 _G ,
17 _B is disposed in a position that does not overlap with each other, and are disposed at positions that do not overlap with the scan driving circuit 27.

(Refer to Modified Example 2 and FIG. 13) As shown in FIG. 13, B, G,
The R signal drive circuits may be integrated into one place. The signal drive circuit 17 shown in FIG. 13 is divided into three outputs, and is configured as a signal drive circuit for each of the display panels R, G, and B. Although not shown, each display panel R, G,
The signal electrodes of B are routed to corresponding output terminals of the signal drive circuit 17 by the FPC 16. However,
Also in this case, the signal drive circuit 17 and the scan drive circuit 27 are arranged at positions not overlapping each other.

With this arrangement, the number of signal drive circuits can be reduced, and the signal drive circuits do not overlap.

In the embodiment shown in FIG. 13, the signal driving circuit has only one system output, and each of the display panels R, G,
By connecting in parallel to the B signal electrode and simultaneously driving a plurality of display panels (in this case, three display panels) based on the same image data, monochrome display can be performed.

(Third bending example, see FIGS. 14 to 16)
In the third bending example, as shown in FIG. 14, the connection panels are manufactured in a state where they are connected by FPCs 25a and 25b in the order of G, B, and R. Then, the portion connected by the FPC 25a is connected to the lower substrate 2 of the display panels G and B as indicated by arrows.
1 _G and 21 _B are folded to face each other, and then FP
C25b is connected to the display panel G as indicated by the arrow.
Bent over as the lower substrate 21 _R of the substrate 11 _G and the display panel R is facing the. Or, an arrow 'display panel G as, on the substrate 11 _G, 11 folded _B such that face of the B, then the arrow' lower substrate 21 of the display panel G as
_G and may be bent so that the face on the substrate 11 _R of the display panel R. FIG. 15 shows a liquid crystal display device manufactured by bending in the order of. FIG. 16 shows a liquid crystal display device manufactured by bending in the order of ','.

Before bending to the state shown in FIG. 15 or FIG. 16, the FPC 26 to which the scan drive circuit 27 is attached is connected to the substrate 21 _R , and the scan drive circuit 27 and the scan electrode 22 are electrically connected. Further, the signal driving circuits 17 _R , 17 _G ,
FPCs 16 _R , 16 _G , and 16 _B with 17 _B attached to the substrate 1
1 _R , 11 _G , and 11 _B , respectively, and a signal driving circuit 1
7 _R , 17 _G , and 17 _B are electrically connected to the signal electrodes 12 _R , 12 _G , and 12 _B , respectively. The wiring state is not shown.

Then, as described above, or
Fold in order. Thus, it is possible to obtain a stacked type liquid crystal display device including the scanning drive circuit 27 and the signal drive circuits 17 _R , 17 _G , and 17 _B and capable of full-color display. In the stacked state, each of the signal drive circuits 17 _R , 1
7 _G and 17 _B are arranged so as not to overlap each other, and
It is arranged at a position that does not overlap with the scanning drive circuit 27. Thus, the thickness can be reduced as much as possible even in the case of the stacked type. In addition, by folding the three types of connection panels, a laminated liquid crystal display element can be easily manufactured.

(See connection panel manufacturing example 2, FIG. 17) As shown in FIG. 17, display panels B and G were manufactured in the same procedure as in manufacturing example 1 described above, and then display panel R separately manufactured. Connect. The connection of the drive circuit to the connection panel
What is necessary is just to carry out similarly to each bending example demonstrated previously.

By manufacturing a multi-layer liquid crystal display panel as described above, the thickness of the liquid crystal layer of one of the display panels is different from the thickness of the liquid crystal layer of the other display panel. Even if it is difficult to connect the respective display panels, it is possible to easily manufacture a multilayer display element.

In the above example, the number of the liquid crystal display panels to be laminated is three, but is not limited to this, and may be two. FIG. 18 shows an example in which the number of display panels to be stacked is two. In this case, as shown in FIG. 18, after the scanning electrodes of the two display panels are connected on the same substrate, the connection panel is cut out, and the driving circuits 17 and 27 are connected and folded to form a two-layer stack. A type display element is manufactured.

(Other Embodiments) The display device and the method of manufacturing the same according to the present invention are not limited to the above embodiments, but can be variously modified within the scope of the invention. .

In particular, in the above embodiment, the liquid crystal display device using cholesteric liquid crystal has been described as an example, but the present invention is not limited to this. For example, a stacked liquid crystal display device in which a plurality of display panels each including a guest-host type liquid crystal are stacked may be used. Further, any display device having a stacked display panel driven by a matrix may be used, and is not limited to a liquid crystal display device.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing a basic configuration of a multilayer liquid crystal display element.

FIG. 2 is an explanatory view showing a first example of manufacturing a connection panel in the manufacturing method according to the present invention.

FIG. 3 is an explanatory view showing a first example of manufacturing a connection panel in the manufacturing method according to the present invention, and is a continuation of FIG. 2;

FIG. 4 is an explanatory view showing a first example of manufacturing a connection panel in the manufacturing method according to the present invention, and is a continuation of FIG. 3;

FIG. 5 is an explanatory view showing a first example of manufacturing a connection panel in the manufacturing method according to the present invention, and is a continuation of FIG. 4;

FIG. 6 is an explanatory view showing a first bending example of the connection panel in the manufacturing method according to the present invention.

7 is an explanatory view showing a first bending example of the connection panel in the manufacturing method according to the present invention, and is a continuation of FIG. 6;

FIG. 8 is an explanatory view showing a first bending example of the connection panel in the manufacturing method according to the present invention, and is a continuation of FIG. 7;

FIG. 9 is an explanatory view showing a first example of bending the connection panel in the manufacturing method according to the present invention, and is a continuation of FIG. 8;

FIG. 10 is an explanatory view showing a second bending example of the connection panel in the manufacturing method according to the present invention.

FIG. 11 is an explanatory view showing a second example of bending the connection panel in the manufacturing method according to the present invention, and is a continuation of FIG. 10;

FIG. 12 is an explanatory view showing Modification Example 1 of the second bending example of the connection panel in the manufacturing method according to the present invention.

FIG. 13 is an explanatory view showing Modification Example 2 of the second bending example of the connection panel in the manufacturing method according to the present invention.

FIG. 14 is an explanatory view showing a third bending example of the connection panel in the manufacturing method according to the present invention.

FIG. 15 is an explanatory view showing a third bending example of the connection panel in the manufacturing method according to the present invention, and is a continuation of FIG. 14;

FIG. 16 is an explanatory view showing a third example of bending the connection panel in the manufacturing method according to the present invention, and is a continuation of FIG. 14;

FIG. 17 is an explanatory view showing a second example of manufacturing a connection panel in the manufacturing method according to the present invention.

FIG. 18 is an explanatory view showing a third example of manufacturing a connection panel in the manufacturing method according to the present invention.

[Explanation of symbols]

 11, 21 ... substrate 12 ... signal electrode 22 ... scanning electrode 17 ... signal drive circuit 25a, 25b ... flexible printed circuit board 27 ... scan drive circuit R, G, B ... liquid crystal display panel

 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Tsukasa Yagi 2-3-13 Azuchicho, Chuo-ku, Osaka-shi, Osaka F-term in Osaka International Building Minolta Co., Ltd. (Reference) 2H089 HA21 HA27 HA32 KA20 QA11 QA16 RA04 RA11 2H092 GA50 GA51 HA04 NA25 PA06 QA06 QA11 5C094 AA08 AA15 AA22 AA48 BA43 CA19 CA24 DA01 DA03 DA11 DB01 DB02 DB04 DB05 EA04 EA05 EA10 EB02 ED03 FA01 FA02 FB12 FB15 GB01 GB10 5G435 AA04 AA17 EE16 EE13 EB13 EB12 EB12 EB12 BB12 KK03

Claims (21)

[Claims] 1. A first electrode of a plurality of display panels each having a first electrode and a second electrode are connected in series, and a plurality of display panels are stacked by bending the connection portion. A first driving circuit connected to the first electrode of the display panel, and a plurality of second driving circuits connected to the second electrode of each display panel for each display panel, wherein each of the second driving circuits is A display device, wherein the display devices are arranged so as not to overlap with each other. 2. The display device according to claim 1, wherein the first electrodes of the plurality of display panels each having the first electrode and the second electrode are connected in series, and the connection portion is bent to laminate the plurality of display panels. A first drive circuit connected to the first electrode of the display panel, and at least one second drive circuit connected to the second electrode of each display panel, wherein the first drive circuit and the second drive circuit A display device, wherein the display devices are arranged so as not to overlap with each other. 3. A display device comprising a plurality of the second drive circuits, wherein each of the second drive circuits is connected to each of the second electrodes of each of the display panels, and the second drive circuits are arranged at positions not overlapping with each other. The display device according to claim 2, wherein: 4. The device according to claim 1, wherein said first electrode is a scanning electrode, and said second electrode is a signal electrode.
Or the display device according to claim 3. 5. The display device according to claim 1, wherein the connection portion is formed of a flexible wiring board. 6. The display device according to claim 1, further comprising three or more display panels. 7. A plurality of display panels connected in series,
7. The display device according to claim 6, wherein the display panel at one end is folded and laminated so as to be located inside. 8. A plurality of display panels connected in series,
7. The display device according to claim 6, wherein each connecting portion is sequentially folded in the opposite direction and laminated. 9. The display device according to claim 1, further comprising two display panels. 10. The display device according to claim 1, wherein the second drive circuit is disposed at an end on the same side in each display panel. The display device according to claim 6, claim 7, claim 8, or claim 9. 11. The display device according to claim 1, wherein the second drive circuit includes at least one set of display panels arranged at different ends.
The display device according to claim 4, claim 5, claim 6, claim 7, claim 8, or claim 9. 12. The display panel according to claim 1, wherein each of the display panels has a liquid crystal sandwiched between the first and second electrodes. The display device according to claim 6, claim 7, claim 7, claim 8, claim 9, claim 10, or claim 11. 13. A step of bending a connection portion of a plurality of display panels each having a first electrode and a second electrode and connected in series with the first electrode to laminate a plurality of display panels; Connecting a first drive circuit to the first electrode of the liquid crystal display panel, connecting a plurality of second drive circuits to the second electrode of each liquid crystal display panel, and disposing the second drive circuits at positions not overlapping with each other. A method for manufacturing a liquid crystal display device, comprising: 14. A step of bending a connection portion of a plurality of display panels each including a first electrode and a second electrode and connecting the first electrode in series, and stacking a plurality of display panels; Connecting a first drive circuit to a first electrode of the display panel, connecting at least one second drive circuit to a second electrode of each display panel, and preventing the first drive circuit and the second drive circuit from overlapping each other. A method of manufacturing a display device, comprising the steps of: 15. A step of bending a connection portion of a plurality of display panels each including a first electrode and a second electrode and connecting the first electrode in series, and stacking a plurality of display panels; Connecting a first drive circuit to the first electrode of the display panel; connecting a plurality of second drive circuits to the second electrode of each display panel; and overlapping the first drive circuit and each second drive circuit with each other. A method of manufacturing a display device, comprising: 16. The method for manufacturing a display device according to claim 13, wherein the first and / or second drive circuits are connected after bending the connection portion. 17. The method according to claim 13, wherein the connection portion is bent after connecting the first and / or second drive circuits. 18. The display device according to claim 13, wherein the first and second drive circuits are connected by a flexible wiring board, and after the connection, the wiring board is bent toward the back side of the display panel. Claim 15, Claim 16
A method for manufacturing a display device according to claim 17. 19. The method of manufacturing a display device according to claim 13, wherein three or more display panels are connected. 20. The method for manufacturing a display device according to claim 19, wherein each connection portion is sequentially bent in an opposite direction. 21. The display panel according to claim 19, wherein each of the plurality of display panels connected in series is bent so that the display panel at one end thereof is located inside.
The manufacturing method of the display device according to the above.