Cholesteric display module, its manufacturing method, and cholesteric display device

Abstract

This utility model provides a cholesteric display module, a manufacturing method thereof, and a cholesteric display device. The cholesteric display module includes at least one glass substrate having a display area substrate and a driving circuit area substrate, a plurality of first driving circuits, an insulating layer, and a plurality of second driving circuits. The driving circuit area substrate is provided with a first driving circuit which is a metal circuit and a second driving circuit which is an ITO circuit. In addition, the cholesteric display module is constructed by stacking three layers, and the first driving circuit, the second driving circuit, and the electric signals are collected on a flexible printed circuit board, so that the flexible printed circuit board can be easily bent and connected to a component mounting board installed on the back side of the cholesteric display module. The required dimensions of the flexible printed circuit board can also be reduced compared to the conventional technology, which can reduce costs and shorten the production man-hours on the production line.

Description

[Technical field]

[0001] The present invention relates to a cholesteric display device, especially to a cholesteric display module and its manufacturing method. Through the improvement of the manufacturing method and innovative structure, a cholesteric liquid crystal display device is provided which effectively improves the manufacturing efficiency and cost of the prior art. [Background technology]

[0002] Traditionally, the manufacturing process of cholesteric displays is complicated and requires a large number of flexible printed circuit boards, which not only increases the material cost but also makes the flexible printed circuit boards bulky and difficult to assemble.

[0003] As shown in Figure 1, in the conventional technology, a first driving circuit 3, a second driving circuit 5, and multiple driver ICs 6 that connect electrodes are mounted on a flexible printed circuit board 7 on a glass substrate 2. Since a large number of first driving circuits 3, second driving circuits 5, and driver ICs 6 can be mounted, the flexible printed circuit board must be manufactured larger. As shown in Figure 1, the flexible printed circuit board 7 is divided into two parts, the right side and the bottom side, so two connectors are required for connection, and the material cost and assembly work are doubled compared to using only one flexible printed circuit board.

[0004] SUMMARY OF THE PRESENT EMBODIMENTS Accordingly, the present invention provides a cholesteric display module and a manufacturing method thereof that can effectively reduce the manufacturing cost, shorten the manufacturing steps, and save the assembly space of the required cholesteric display device. Summary of the Invention [Problem to be solved by the invention]

[0005] The present invention provides a cholesteric display module and a manufacturing method thereof, which can effectively solve the problems of reducing materials and improving manufacturing man-hours by facilitating the assembly of the cholesteric display device. [Means for solving the problem]

[0006] The present invention relates to a cholesteric display module having a display area with a number of cholesteric liquid crystals.

[0007] In order to achieve at least one advantage of the present invention, a first preferred embodiment put forward by the present invention is a cholesteric display module, which includes at least one glass substrate, a plurality of first driving circuits, an insulating layer, and a plurality of second driving circuits.

[0008] At least one glass substrate is provided with a display area substrate, in which a plurality of cholesteric liquid crystals are sandwiched in a space corresponding to the display area, and a driving circuit area substrate, which is integrally extended from the display area substrate. That is, the driving circuit substrate and the display area are located at different positions on the glass substrate, so that the display area and the driving circuit area substrate do not overlap when viewed from the viewing angle of the cholesteric display module.

[0009] A plurality of first driving circuits are arranged on the driving circuit area substrate, and the first driving circuits can be metal circuits. The surfaces of the driving circuit substrate between the plurality of first driving circuits and the gaps between the driving circuits are covered with an insulating layer, and then an electrically conductive through hole is formed in the insulating layer to connect electricity. By providing a plurality of second driving circuits on the surface opposite to the first driving circuits, it is possible to design the second driving circuit as a visually transparent ITO circuit. By providing an electrically conductive through hole, an electrical signal can be conducted from the metal circuit of the first driving circuit through the insulating layer to the ITO circuit of the second driving circuit.

[0010] By providing metal circuits and ITO circuits on both the display area substrate and the driving circuit substrate, the manufacturing process can be performed simultaneously, shortening the processing time and improving production efficiency. In addition, since the display area substrate and the driving circuit substrate are integrated glass substrates, the impact on costs is not large even if the glass substrate size is slightly increased. Compared to the conventional technology that uses a glass substrate and a large-area flexible printed circuit board, this invention has the advantage of eliminating secondary processing costs by using a single material.

[0011] Further, the cholesteric display module includes a plurality of driver ICs mounted on a drive circuit area substrate adjacent to the display area substrate, each driver IC being connected to electrodes of a first drive circuit and a second drive circuit, respectively.

[0012] In addition, in the cholesteric display module, the flexible printed circuit board connecting the multiple first start circuits and the multiple second start circuits is bonded to the periphery of the glass substrate, which has the advantage of making the flexible printed circuit board smaller in size and fewer in number. In addition, since there is a component mounting board under the cholesteric display module, the flexible printed circuit board connecting the multiple first start circuits and the multiple second start circuits can be bent and inserted into the component mounting board connector. The size of the flexible printed circuit board can be reduced compared to the conventional technology, and the material cost and the production man-hours can be reduced. In addition, the miniaturization and standardization of the flexible printed circuit board can reduce the cost of mold manufacturing or allow the purchase of market standard products to be considered.

[0013] Since the cholesteric display module has two glass substrates, the glass substrates are located under a plurality of cholesteric liquid crystals, and the structure combining a plurality of first driving circuits, an insulating layer and a plurality of second driving circuits can also be formed on the upper surface of the glass substrate, so that the flexible printed circuit board connecting the ITO circuit and the metal circuit is folded and inserted into the connector of the component mounting board at the bottom of the glass substrate.

[0014] The present invention relates to a cholesteric display module including a glass substrate having at least one display area having multiple cholesteric layers, multiple first driving circuits, an insulating layer, multiple second driving circuits and a flexible printed circuit board, and relates to a cholesteric display device including three stacked cholesteric display modules and a component mounting substrate.

[0015] At least one glass substrate is provided with a display area substrate, in which a plurality of cholesteric liquid crystals are sandwiched in a space corresponding to the display area, and a driving circuit area substrate, which is integrally extended from the display area substrate. That is, the driving circuit substrate and the display area are located at different positions on the glass substrate, so that the display area and the driving circuit area substrate do not overlap when viewed from the viewing angle of the cholesteric display module.

[0016] A plurality of first driving circuits are arranged on the driving circuit area substrate, and the first driving circuits can be metal circuits. The surfaces of the driving circuit substrate between the plurality of first driving circuits and the gaps between the driving circuits are covered with an insulating layer, and then an electrically conductive through hole is formed in the insulating layer to connect electricity. By providing a plurality of second driving circuits on the surface opposite to the first driving circuits, it is possible to design the second driving circuit as a visually transparent ITO circuit. By providing an electrically conductive through hole, an electrical signal can be conducted from the metal circuit of the first driving circuit through the insulating layer to the ITO circuit of the second driving circuit.

[0017] In addition, in the cholesteric display module, the flexible printed circuit board connecting the multiple first start circuits and the multiple second start circuits is bonded to the periphery of the glass substrate, which has the advantage of making the flexible printed circuit board smaller in size and fewer in number. In addition, since there is a component mounting board under the cholesteric display module, the flexible printed circuit board connecting the multiple first start circuits and the multiple second start circuits can be bent and inserted into the component mounting board connector. The size of the flexible printed circuit board can be reduced compared to the conventional technology, and the material cost and the production man-hours can be reduced. In addition, the miniaturization and standardization of the flexible printed circuit board can reduce the cost of mold manufacturing or allow the purchase of market standard products to be considered.

[0018] To explain in more detail, from the viewing angle direction looking down on the display area, the three flexible printed circuit boards of the three cholesteric display modules are on the same side as the three glass substrates, and can also be offset, so that three connectors for inserting the flexible printed circuit boards are arranged side by side on the component mounting board.

[0019] When viewed from above at the viewing angle of the display area, the three flexible printed circuit boards of the three cholesteric display modules can be arranged so that they overlap on the same side as the three glass substrates, so that three connectors for inserting the flexible printed circuit boards into the component mounting board are arranged in a stacked manner.

[0020] The present invention relates to a cholesteric display module, which includes a glass substrate having a display area, a display area substrate corresponding to the display area, and an integrated driving circuit area substrate extending from the display area substrate. The manufacturing method of the present invention will be described below.

[0021] (Step 1) Through the processes of applying photoresist, exposing, developing, etching, and washing, multiple metal circuits are simultaneously formed on the glass substrate, the display area substrate, and the drive circuit area substrate.

[0022] (Step 2) After the processes of applying photoresist, exposing it to light, developing it, etching it, and washing it, an insulating layer is applied to the surfaces of multiple metal circuits and to the surface of the drive circuit board in the gaps between the metal circuits so that through-holes can be secured.

[0023] (Step 3) After the processes of applying photoresist, exposing, developing, etching, and washing, multiple ITO circuits are formed simultaneously so that the ITO circuits can be bonded to the through-holes. The ITO circuits and metal circuits are connected through the through-holes, and are then connected to the first and second driving circuits and electrodes.

[0024] The manufacturing method further includes the following steps:

[0025] A plurality of driver ICs are disposed on a driver circuit area substrate adjacent to the display area substrate, and each driver IC is electrically connected to one metal circuit and one ITO circuit, respectively.

[0026] A plurality of metal circuits and a plurality of ITO circuits are electrically bonded to a flexible printed circuit board located on the periphery of the driver circuit area substrate. Effect of the Invention

[0027] Therefore, the cholesteric display module and its manufacturing method, and the cholesteric display device provided by the present invention can reduce the number of connectors by reducing the use of flexible printed circuit boards, and the circuits of the display area substrate and the driving circuit area substrate can be manufactured simultaneously using the same material, and the manufacturing labor can be reduced, thereby improving production efficiency compared to the conventional technology.

[0028] In order to make the technical means of the present invention more clearly understood and to enable the present invention to be implemented in accordance with the contents of this specification, and to make the above and other objects, features and advantages of the present invention more apparent, preferred embodiments will be described in detail in conjunction with the drawings. [Brief description of the drawings]

[0029] In order to make the technical means of the present invention more clearly understood and to enable the present invention to be implemented in accordance with the contents of this specification, and to make the above and other objects, features and advantages of the present invention more apparent, preferred embodiments will be described in detail in conjunction with the drawings. [Figure 1] FIG. [Diagram 2] 1 is a side view of a cholesteric display module according to a preferred embodiment of the present invention; [Diagram 3] 1 is a perspective view of a cholesteric display module according to a preferred embodiment of the present invention; [Figure 4] 1 is an enlarged partial cross-sectional view of a cholesteric display module according to a preferred embodiment of the present invention; [Diagram 5] 1 is a schematic diagram of a cholesteric display device according to a preferred embodiment of the present invention; [Figure 6] 1 is a perspective view of a first embodiment of a cholesteric display device according to the present invention; [Figure 7] 2 is a second embodiment of the cholesteric display device of the present invention. [Figure 8] 3 is a flow chart of a manufacturing method for a cholesteric display module according to the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0030] The specific structural and functional details disclosed herein are merely representative and are used for the purpose of describing exemplary embodiments of the invention, however, the invention may be embodied in many alternative forms and should not be construed as being limited to only the embodiments described herein.

[0031] In the description of the invention, the orientation or positional relationship indicated by terms such as "center", "lateral", "up", "down", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., is based on the orientation or positional relationship shown in the drawings, and is for convenience and simplification of the description of the invention, and does not imply that the devices or components referred to have a particular orientation and must be constructed and operated in a particular direction, and therefore should not be construed as limiting the invention. In addition, the terms "first" and "second" are used for descriptive purposes only, and should not be understood as indicating or implying a relative importance or implying a number of the technical features shown. Thus, features defined as "first" and "second" can explicitly or implicitly include one or more of these features. In the description of the invention, unless otherwise specified, "plurality" means two or more. Furthermore, the term "comprises" and variations thereof are intended to cover a non-exclusive inclusion.

[0032] In describing the present invention, terms such as "installed", "coupled" and "connected" should be interpreted broadly unless otherwise clearly specified and limited, such as fixed connection, detachable connection, integral connection, mechanical connection, electrical connection, direct connection, indirect connection, connection inside two components, etc. Those skilled in the art can specifically understand the specific meaning of the above terms in the present invention.

[0033] The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments. Unless expressly indicated otherwise, the singular forms "a", "an" and "an" as used herein are intended to include the plural. Additionally, the terms "comprise" and / or "contain" as used herein specify the presence of stated features, integers, steps, operations, units and / or components, but do not exclude the presence or addition of one or more other features, integers, steps, operations, units, components and / or combinations thereof.

[0034] SUMMARY OF THE PRESENT DISCLOSURE The present invention provides a cholesteric display module, a manufacturing method thereof, and a cholesteric display device, which can reduce the materials and man-hours required for producing a cholesteric display device.

[0035] As shown in Figures 2-3, Figure 2 is a side view of a cholesteric display module 100 according to a preferred embodiment of the present invention, and Figure 3 is a top view of the cholesteric display module 100 according to a preferred embodiment of the present invention. The cholesteric display module 100 has a display area 23 composed of a plurality of cholesteric liquid crystals. The cholesteric display module 100 is a cholesteric display module including two glass substrates 20, a plurality of first driving circuits 30, an insulating layer 40, a through hole 42, a plurality of second driving circuits, a driver IC 60, and a flexible printed circuit board 70.

[0036] 3, there are two glass substrates 20, the lower glass substrate 20 includes a display area substrate 22 and a driving circuit area substrate 24, and a number of cholesteric liquid crystals 10 are sandwiched between the corresponding display area substrates 22 in the display area 23. The driving circuit area substrate 24 is an integral type extended from the display area substrate, that is, the driving circuit area substrate 24 on the glass substrate 20 is not within the range of the display area 23, and does not overlap with the driving circuit area.

[0037] A plurality of first driving circuits 30 are arranged on the driving circuit area substrate 24, and the first driving circuits 30 can be metal circuits, so that the metal circuits of the display area substrate 22 corresponding to the display area 23 can be molded together in the manufacturing process. The surface of the driving circuit area substrate 24 in the gaps between the plurality of first driving circuits 30 and the driving circuits is covered with an insulating layer 40, and then through holes 42 are provided in the insulating layer 40. A plurality of second driving circuits 50 are arranged on the surface of the insulating layer 40 on the opposite side to the first driving circuits 30, and the conductivity of the second driving circuits 50 in the portion is connected to the through holes 42, so that it can be conducted to the ITO circuit. The second driving circuits 50 can be designed as an ITO circuit that is visually transparent. The ITO circuit of the display area 23 can be molded together in the manufacturing process, and finally, an insulating material is applied between the plurality of second driving circuits 50. Electrically conductive through holes 42 allow electrical signals to be coupled from the metal circuitry of the first drive circuit 30 through the insulating layer 40 to the ITO circuitry of the second drive circuit 50 in the subsection.

[0038] Furthermore, a plurality of driver ICs 60 are arranged on the drive circuit area substrate 24 adjacent to the display area substrate 22, and each driver IC 60 is electrically connected to an end of one first drive circuit 30 and one second drive circuit 50, respectively. The electrical signals of the plurality of first drive circuits 30 and the plurality of second drive circuits 50 are inserted into a connector of the component mounting substrate 80 on the back surface of the cholesteric display module 100 through a flexible printed circuit board 70.

[0039] Please continue to refer to Figures 2 and 4. Both the display area substrate 22 and the driving circuit area substrate 24 contain metal circuits and ITO circuits, so they can be molded simultaneously in the manufacturing process, shortening the processing time and improving production efficiency. In addition, compared to the combination of a glass substrate 20 and a flexible printed circuit board in the prior art, the display area substrate 22 and the driving circuit area substrate 24 in this invention are the same glass substrate 20, so there is no increase in cost due to secondary processing due to the single material.

[0040] The cholesteric display module 100 has two glass substrates 20 stacked vertically with a plurality of cholesteric liquid crystals 10 sandwiched therebetween. A combination structure of a plurality of first driving circuits 30, an insulating layer 40, and a plurality of second driving circuits 50 is sequentially disposed on the upper surface of the lower glass substrate 20. The flexible printed circuit board 70 is connected or partially connected to the driving circuits on the glass substrate 20, which facilitates the insertion process into the engagement substrate 80 on the rear surface of the lower glass substrate 20. The size of the flexible printed circuit board 70 is smaller than that of the conventional technology, which requires a reduction in material costs. The miniaturization of the flexible printed circuit board 70 makes the manufacturing process easier, and the use of standard parts can further reduce the cost of molds.

[0041] Please continue to refer to Figure 5 and Figure 3. The present invention relates to a technology for a cholesteric display device 100A including three cholesteric display modules 100 arranged in a stacked manner and a component mounting substrate 8. Each cholesteric display module 100 includes a display area 23, a number of cholesteric liquid crystals 10, two glass substrates 20, a number of first driving circuits 30, an insulating layer 40, a number of second driving circuits 50, and a flexible printed circuit board 70.

[0042] A glass substrate 20 includes a display area substrate 22 and a driving circuit area substrate 24, and a number of cholesteric liquid crystals 10 are sandwiched between the corresponding display area substrate 22 of the display area 23. The driving circuit area substrate 24 is an integral type extended from the display area substrate, that is, the driving circuit area substrate 24 on the glass substrate 20 is not within the range of the display area 23, so it does not overlap with the driving circuit area.

[0043] Through electrically conductive through holes 42 in the insulating layer 40, the electrical signals of the first driving circuit 30 can be connected to a second driving circuit 50 on the opposite side of the insulating layer 40. The first driving circuit 30 is a metal circuit, and the second driving circuit 50 is a visually transparent ITO circuit.

[0044] Since the cholesteric display device 100A includes a flexible printed circuit board 70 connected to the glass substrate 20, the component mounting board 80 at the bottom of the lowest cholesteric display module (100) has three connectors into which the flexible printed circuit boards 70 of the three cholesteric display modules 100 can be inserted and electrically connected to the component mounting board 80. That is, the electrical signals of the ITO circuit and metal circuit of each cholesteric display module 100 flow into the flexible printed circuit board 70 and can be inserted into the connectors of the component mounting board 80 at the bottom through the flexible printed circuit boards 70.

[0045] As shown in Fig. 6, it is a top view of a first embodiment of a cholesteric display device 100A of the present invention. From the viewing angle direction looking down on the display area 23, the flexible printed circuit boards 70 of the three cholesteric display modules 100 are offset on the same side of the three glass substrates 20. The side can be any one of the long side or short side of the cholesteric display device 100A. As shown in the drawing, it is preferable to arrange the three connectors side by side on the long side of the cholesteric display device 100A, so that the component mounting board 80 does not need to be thicker than necessary, and the three flexible printed circuit boards 70 can be unified in length, and the three flexible printed circuit boards 70 are offset from each other to avoid connection interference.

[0046] As shown in Fig. 7, it is a top view of a second embodiment of the cholesteric display device 100A of the present invention. From the viewing angle direction looking down on the display area 23, the flexible printed circuit boards 70 of the three cholesteric display modules 100 are overlapped on the same side of the three glass substrates 20. The side can be any side, either the long side or the short side, of the cholesteric display device 100A. The three connectors are preferably arranged in a stacked manner on the long side of the cholesteric display device 100A, so that the lengths of the three flexible printed circuit boards 70 are different, and the height of the cholesteric display device 100A can be made shorter. Because of the stacked arrangement, the width over which the flexible printed circuit boards 70 can be folded can be narrowed, and the cholesteric display device can be made thinner.

[0047] As shown in Fig. 8, the present invention provides a manufacturing technique for a cholesteric display module 100. The manufacturing method for the cholesteric display module 100 includes a glass substrate 20 having a display region 23, a display area substrate 22 and a driving circuit area substrate 24, a display region 23 corresponding to the display area substrate 22, and a driving circuit substrate 24 integrally extending from the display area substrate 22, and the manufacturing method thereof will be described below.

[0048] Step 1SO1: Form metal circuits of the first driving circuits 30 on the driving circuit area substrate 24 of the glass substrate 20, and also form a metal circuit of the display area substrate 22. That is, the manufacturing process of the first driving circuits 30 can be performed simultaneously with the metal circuit of the display area substrate 22 through the steps of photoresist coating SO101, exposure SO102, development SO103, etching SO104, and cleaning SO105.

[0049] Step 2SO2: An insulating layer 40 is applied to the surfaces of the metal circuits of the multiple first drive circuits 30 and to the surface of the drive circuit area substrate 24 in the gaps between the metal circuits through the processes of photoresist application SO201, exposure SO202, development SO203, etching SO204, and cleaning SO205, so that through holes 42 are simultaneously secured in the metal circuits in the portions corresponding to the metal circuits of the first drive circuits 30.

[0050] Step 3SO3: ITO circuits of a plurality of second driving circuits 50 are formed simultaneously, and the ITO circuits of the parts corresponding to the plurality of ITO circuits are connected to the through holes 42, and the metal circuits of the parts are connected to the electrodes, thereby connecting the first driving circuit 30 and the second driving circuit 50. The ITO circuits of the plurality of second driving circuits 50 can be formed together with the ITO circuits of the display area substrate 22 through the steps of photoresist coating SO301, exposure SO302, development SO303, etching SO304, and cleaning SO305.

[0051] In addition, the manufacturing process also includes: a plurality of driver ICs 60 are disposed on the driver circuit area substrate 24 adjacent to the display area substrate 22, and each driver IC 60 is electrically connected to an end of one first driver circuit 30 and one second driver circuit 50 respectively; and a flexible printed circuit board 70 is provided on the side edge of the driver circuit area substrate 24, so that a plurality of metal circuits and a plurality of ITO circuits flow through the flexible printed circuit board.

[0052] The cholesteric display module 100 and its manufacturing method, and the cholesteric display device 100A provided by the present invention can reduce the cost of using the flexible printed circuit board 70 compared to the prior art. The display area substrate 22 and the driving circuit area substrate 24 are made of the same material, so the molding process can be carried out simultaneously. In addition, the number of connectors can be reduced, so that the production efficiency can be improved by the above three points compared to the prior art.

[0053] The above preferred embodiments are provided to more clearly illustrate the features and spirit of the present invention, and the present invention is not limited by these embodiments. The purpose is to cover various modifications within the scope of the utility model registration claims of the present invention. Any modifications described in the present invention that use the means and technical contents of the present invention without departing from the spirit or essential features of the present invention are obviously still within the scope of the present invention. [Explanation of symbols]

[0054] 10: Cholesteric liquid crystal 2, 20: Glass substrate 22: Display area board 23:Display area 24: Drive circuit area board 3, 30: First drive circuit 40: Insulating layer 42:Through hole 5, 50: Second drive circuit 6, 60: Driver IC 7, 70: Flexible printed circuit board 80: Component mounting board 100: Cholesteric display module 100A: Cholesteric display device

Claims

1. A cholesteric display module (100) comprising a display area (23) having a number of cholesteric liquid crystals (10), There is at least one glass substrate (20) having a display area substrate (22) and a drive circuit area substrate (24), a plurality of cholesteric liquid crystals (10) are sandwiched between the display area (23) and the corresponding display area substrate (22), and the drive circuit area substrate (24) is a substrate extended integrally from the display area substrate (22); A plurality of first driving circuits (30) disposed on a surface of the driving circuit area substrate (24); an insulating layer (40) covering a surface of the drive circuit area substrate (24) between the plurality of first drive circuits (30) and each of the first drive circuits (30); and a plurality of second drive circuits (50) disposed on an opposite surface of the insulating layer (40) on which the first drive circuits (30) are coated.

2. 2. The cholesteric display module (100) of claim 1, wherein the first driving circuit (30) is a metal circuit and the second driving circuit (50) is an ITO circuit.

3. The cholesteric display module (100) according to claim 1, characterized in that a plurality of driver ICs (60) are arranged on the driver circuit area substrate (24) in a position adjacent to the display area substrate (22), and each driver IC (60) is connected to a first driver circuit (30) and a second driver circuit (50), respectively.

4. 2. The cholesteric display module (100) of claim 1, further comprising a flexible printed circuit board (70) connecting the plurality of first driving circuits (30) and the plurality of second driving circuits (50).

5. The cholesteric display module (100) of claim 1, characterized in that the glass substrate (20) is under the plurality of cholesteric liquid crystals (10), and the combined structure of the plurality of first driving circuits (30), the insulating layer (40), and the plurality of second driving circuits (50) is disposed on the upper surface of the glass substrate (20).

6. 1. A cholesteric display device comprising: At least one glass substrate (20) including a display area substrate (22) in which a plurality of cholesteric liquid crystals (10) are sandwiched in a space corresponding to a display region (23), and a drive circuit area substrate (24) integrally extending from the display area substrate (22); A plurality of first driving circuits (30) disposed on a surface of the driving circuit area substrate (24); an insulating layer (40) covering a surface of the drive circuit area substrate (24) between the plurality of first drive circuits (30) and each of the first drive circuits (30); a plurality of second driving circuits (50) disposed on different surfaces of an insulating layer (40) covering the plurality of first driving circuits (30); a flexible printed circuit board (70) connecting the plurality of first drive circuits (30) and the second drive circuit (50); Three cholesteric display modules (100) including the following are stacked: A cholesteric display device characterized in that three connectors are installed on a component mounting substrate (80) located under the three cholesteric display modules (100), and the flexible printed circuit boards (70) of the cholesteric display modules (100) are electrically connected to the component mounting substrate (80) by insertion.

7. 7. A cholesteric display device (100A) according to claim 6, characterized in that, from a viewing angle direction looking down on the display area (23), the flexible printed circuit boards (70) of the three cholesteric display modules (100) are offset on the same side as the glass substrate (20), and the three connectors of the component mounting substrate (80) correspond to the flexible printed circuit boards (70), so that they are arranged side by side.

8. 7. A cholesteric display device (100A) according to claim 6, characterized in that, from a viewing angle direction looking down on the display area (23), the flexible printed circuit boards (70) of the three cholesteric display modules (100) are arranged overlapping on the same side as the three glass substrates (20), and the three connectors of the component mounting board (80) correspond to the flexible printed circuit boards (70), so that they are stacked.

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