Cholesterol liquid crystal display device

Abstract

The cholesterol liquid crystal display device comprises a liquid crystal module and a touch module. The touch module comprises a first electrode layer, a light filtering side substrate, a second electrode layer, a first optical transparent adhesive layer and a covering substrate. The first electrode layer is connected with the liquid crystal module, the filtering side substrate is connected with the first electrode layer, and the second electrode layer is connected with the filtering side substrate, so that the filtering side substrate is located between the second electrode layer and the first electrode layer. The first optical transparent adhesive layer is connected with the second electrode layer, and the covering substrate is connected with the first optical transparent adhesive layer. Therefore, the loss caused by light penetration can be reduced, and the reflectivity and the contrast ratio of the cholesterol liquid crystal display device can be improved.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to a liquid crystal display device, and in particular to a cholesteric liquid crystal display device with improved reflectivity and contrast ratio. BACKGROUND

[0002] A cholesteric liquid crystal display device (Ch-LCD) is based on the helical structure of cholesteric liquid crystal molecules and controls the arrangement direction of the cholesteric liquid crystal molecules by applying an electric field to achieve display effect by selective reflection. The cholesteric liquid crystal display device has bistability characteristics, i.e. planar state and focal conic state, and can remain stable without an electric field, so the cholesteric liquid crystal display device has the characteristics of low power consumption, can display for a long time and reduce energy consumption.

[0003] However, if the existing cholesteric liquid crystal display device is provided with a touch module, the number of interfaces in the cholesteric liquid crystal display device will increase, thereby affecting the reflectivity and contrast ratio. Please refer to Figure 9 、 Figure 10 and Figure 11 , Figure 9 is a cross-sectional view of an existing cholesteric liquid crystal display device 900, Figure 10 is a partial cross-sectional view of a touch module 920 of Figure 9 in region 10, Figure 11 is a top view of a second electrode layer 925, a second thin film 926 and a third electrode layer 927 of Figure 10 The existing cholesteric liquid crystal display device 900 includes a liquid crystal module 910 and a touch module 920, and the touch module 920 includes, from bottom to top, a first optically transparent adhesive layer 921, a first electrode layer 922, a first thin film 923, a second optically transparent adhesive layer 924, a second electrode layer 925, a second thin film 926, a third electrode layer 927, a third optically transparent adhesive layer 928 and a cover substrate 929. It can be seen from Figures 9 to 11 that the existing cholesteric liquid crystal display device 900 has too many layers of the liquid crystal module 910 and the touch module 920, so that the light transmission loss is high, resulting in a decrease in the optical quality of the cholesteric liquid crystal display device 900.

[0004] Therefore, how to improve the reflectivity and contrast ratio of the cholesteric liquid crystal display device with a touch module has become the goal of the related industry. SUMMARY

[0005] The present disclosure aims to provide a cholesteric liquid crystal display device with improved optical quality by reducing the number of structural layers of a touch module.

[0006] One embodiment of the present disclosure provides a cholesteric liquid crystal display device comprising a liquid crystal module and a touch module. The liquid crystal module comprises a flat layer, and the touch module is disposed on an end surface of the flat layer of the liquid crystal module. The touch module comprises a first electrode layer, a filter-side substrate, a second electrode layer, a first optically transparent adhesive layer, and a cover substrate. The first electrode layer is connected to the flat layer of the liquid crystal module. The filter-side substrate is connected to the first electrode layer, such that the first electrode layer is located between the filter-side substrate and the liquid crystal module. The second electrode layer is connected to the filter-side substrate, such that the filter-side substrate is located between the second electrode layer and the first electrode layer. The first optically transparent adhesive layer is connected to the second electrode layer, such that the second electrode layer is located between the first optically transparent adhesive layer and the filter-side substrate. The cover substrate is connected to the first optically transparent adhesive layer, such that the first optically transparent adhesive layer is located between the cover substrate and the second electrode layer.

[0007] The cholesteric liquid crystal display device according to the foregoing embodiment, wherein the first electrode layer can comprise a plurality of first conductive strips arranged in parallel with each other, the second electrode layer can comprise a plurality of second conductive strips arranged in parallel with each other, and the first conductive strips and the second conductive strips can be arranged orthogonally.

[0008] The cholesteric liquid crystal display device according to the foregoing embodiment, wherein the touch module further comprises a third electrode layer, a thin film substrate, a fourth electrode layer, and a second optically transparent adhesive layer. The third electrode layer can be connected to the first optically transparent adhesive layer, such that the first optically transparent adhesive layer is located between the third electrode layer and the second electrode layer. The thin film substrate can be connected to the third electrode layer, such that the third electrode layer is located between the thin film substrate and the first optically transparent adhesive layer. The fourth electrode layer can be connected to the thin film substrate, such that the thin film substrate is located between the fourth electrode layer and the third electrode layer. The second optically transparent adhesive layer can be connected to the fourth electrode layer and the cover substrate, such that the fourth electrode layer is located between the second optically transparent adhesive layer and the thin film substrate, and the second optically transparent adhesive layer is located between the cover substrate and the fourth electrode layer.

[0009] The cholesteric liquid crystal display device according to the foregoing embodiment, wherein the third electrode layer can comprise a plurality of third conductive strips arranged in parallel with each other, the fourth electrode layer can comprise a plurality of fourth conductive strips arranged in parallel with each other, and the third conductive strips and the fourth conductive strips can be arranged orthogonally.

[0010] The cholesteric liquid crystal display device according to the foregoing embodiment, wherein at least one of the first electrode layer, the second electrode layer, the third electrode layer, and the fourth electrode layer can have a metal mesh structure.

[0011] The cholesteric liquid crystal display device according to the foregoing embodiment can further comprise a driving electrode, and the driving electrode can be electrically connected to the first electrode layer and the liquid crystal module, respectively.

[0012] The cholesteric liquid crystal display device according to the foregoing embodiment can further comprise an integrated circuit element, and the integrated circuit element can be electrically connected to the first electrode layer and the liquid crystal module, respectively.

[0013] The cholesteric liquid crystal display device according to the foregoing embodiment, wherein the filter-side substrate and the cover substrate can be a glass substrate, a flexible polyester substrate, or a polyimide substrate, respectively.

[0014] The cholesteric liquid crystal display device according to the foregoing embodiment, wherein the filter-side substrate can comprise an active matrix structure or a passive matrix structure.

[0015] Another embodiment of the present disclosure provides a cholesteric liquid crystal display device comprising a liquid crystal module and a touch module. The liquid crystal module comprises a flat layer, and the touch module is disposed on an end surface of the flat layer of the liquid crystal module, and the touch module comprises a filter-side substrate, a first electrode layer, an optically transparent adhesive layer, a second electrode layer, and a cover substrate. The filter-side substrate is connected to the flat layer of the liquid crystal module. The first electrode layer is connected to the filter-side substrate, such that the filter-side substrate is located between the first electrode layer and the liquid crystal module. The optically transparent adhesive layer is connected to the first electrode layer, such that the first electrode layer is located between the optically transparent adhesive layer and the filter-side substrate. The second electrode layer is connected to the optically transparent adhesive layer, such that the optically transparent adhesive layer is located between the second electrode layer and the first electrode layer. The cover substrate is connected to the second electrode layer, such that the second electrode layer is located between the cover substrate and the optically transparent adhesive layer.

[0016] The cholesteric liquid crystal display device according to the foregoing embodiment, wherein the first electrode layer can comprise a plurality of first conductive strips arranged in parallel to each other, the second electrode layer can comprise a plurality of second conductive strips arranged in parallel to each other, and the first conductive strips and the second conductive strips can be arranged orthogonally.

[0017] The cholesteric liquid crystal display device according to the foregoing embodiment, wherein the filter-side substrate and the cover substrate can be a glass substrate, a flexible polyester substrate, or a polyimide substrate, respectively.

[0018] The cholesteric liquid crystal display device according to the foregoing embodiment, wherein the filter-side substrate can comprise an active matrix structure or a passive matrix structure.

[0019] Accordingly, the cholesteric liquid crystal display device of the present disclosure can effectively combine the liquid crystal module and the touch module by reducing the total number of layers of the touch module, and reduce the loss of light due to penetration of multiple layers of structure, thereby improving the reflectivity and contrast of the cholesteric liquid crystal display device, and further improving the optical quality of the cholesteric liquid crystal display device. Attached Figure Description

[0020] Figure 1 This is a cross-sectional schematic diagram of the cholesterol liquid crystal display device according to the first embodiment of the present disclosure;

[0021] Figure 2 for Figure 1 A partial cross-sectional view of the touch module in region 2;

[0022] Figure 3 for Figure 2 A top view of the first electrode layer, the filter-side substrate, and the second electrode layer;

[0023] Figure 4 This is a cross-sectional schematic diagram of the cholesterol liquid crystal display device according to the second embodiment of the present disclosure;

[0024] Figure 5 for Figure 4 A partial cross-sectional view of the touch module in region 5;

[0025] Figure 6 This is a cross-sectional schematic diagram of the cholesterol liquid crystal display device according to the third embodiment of this disclosure;

[0026] Figure 7 for Figure 6 A partial cross-sectional view of the touch module in area 7;

[0027] Figure 8 for Figure 7 A three-dimensional schematic diagram of the filter-side substrate, the first electrode layer, the optically transparent adhesive layer, the second electrode layer, and the cover substrate;

[0028] Figure 9 A cross-sectional schematic diagram of an existing cholesterol liquid crystal display device;

[0029] Figure 10 for Figure 9 A partial cross-sectional view of the touch module in region 10; and

[0030] Figure 11 for Figure 10 A top view of the second electrode layer, the second thin film, and the third electrode layer.

[0031] The reference numerals in the attached figures are explained as follows:

[0032] 100, 200, 300, 900: Cholesterol LCD display device

[0033] 110, 210, 310, 910: LCD modules

[0034] 111,311: Planarization layer

[0035] 112a, 112b, 112c: complex layer structure

[0036] 113a, 113b, 113c: lower substrate

[0037] 114a, 114b, 114c: pixel layer

[0038] 115a, 115b: upper substrate

[0039] 116a, 116b, 116c: seal

[0040] 120, 220, 320, 920: touch module

[0041] 121, 221, 321, 922: first electrode layer

[0042] 121a, 321a: first conductive strip

[0043] 122, 222, 322: filter side substrate

[0044] 123, 223, 323, 925: second electrode layer

[0045] 123a, 323a: second conductive strip

[0046] 124, 224, 921: first optically transparent adhesive layer

[0047] 125, 225, 325, 929: cover substrate

[0048] 226, 927: third electrode layer

[0049] 227: thin film substrate

[0050] 228: fourth electrode layer

[0051] 229, 924: second optically transparent adhesive layer

[0052] 324: optically transparent adhesive layer

[0053] 923: first thin film

[0054] 926: second thin film

[0055] 928: third optically transparent adhesive layer

[0056] 2, 5, 7, 10: region DETAILED DESCRIPTION

[0057] The various embodiments of the present disclosure will be discussed in more detail below. However, the embodiments can be applied to various disclosed concepts and can be specifically implemented in various different specific fields. The specific embodiments are merely for illustration purposes and do not limit the scope of the disclosure. In addition, for the sake of simplicity of the drawings, some conventional structures and elements will be shown in the drawings in a simplified manner and repeated elements can be denoted by the same reference numerals or similar reference numerals.

[0058] In the present disclosure, when a certain element (or mechanism or module, etc.) is "connected" or "disposed" to another element, it can mean that the element is directly connected or directly disposed to another element, or it can mean that the element is indirectly connected or indirectly disposed to another element, that is, there are other elements between the element and another element. However, when it is explicitly stated that a certain element is "directly connected" or "directly disposed" to another element, it means that there are no other elements between the element and another element.

[0059] Please refer to Figure 1 , Figure 1 A cross-sectional schematic view of a cholesteric liquid crystal display device 100 according to a first embodiment of the present disclosure is shown in FIG. 1. The cholesteric liquid crystal display device 100 includes a liquid crystal module 110 and a touch module 120.

[0060] In detail, the liquid crystal module 110 includes a planar layer 111, and the liquid crystal module 110 can further include three stacked layer structures 112a, 112b, 112c. The layer structures 112a, 112b at the bottom and middle layers can include a lower substrate 113a, 113b, a pixel layer 114a, 114b, an upper substrate 115a, 115b, and a sealing member 116a, 116b, the pixel layer 114a, 114b is connected to the lower substrate 113a, 113b respectively, the upper substrate 115a, 115b is connected to the pixel layer 114a, 114b respectively, so that the pixel layer 114a, 114b is located between the upper substrate 115a, 115b and the lower substrate 113a, 113b respectively, and the sealing member 116a, 116b is disposed between the upper substrate 115a, 115b and the lower substrate 113a, 113b respectively and surrounds the pixel layer 114a, 114b. The layer structure 112c at the top layer can include a lower substrate 113c, a pixel layer 114c, and a sealing member 116c, the pixel layer 114c and the sealing member 116c are connected to the lower substrate 113c respectively, and the sealing member 116c surrounds the pixel layer 114c. The planar layer 111 can be connected to the pixel layer 114c of the layer structure 112c at the top layer, and the above-mentioned connection relationship can be achieved by disposing a transparent optical adhesive layer or a colored optical adhesive layer. If a colored optical adhesive layer is used, the effect of absorbing or filtering stray light can be further achieved.

[0061] Furthermore, the pixel layer 114a of the bottommost multi-layer structure 112a can be a red pixel layer, the pixel layer 114b of the middle multi-layer structure 112b can be a green pixel layer, and the pixel layer 114c of the topmost multi-layer structure 112c can be a blue pixel layer, so as to achieve a good display effect. When the pixel layers 114a, 114b, 114c of the three multi-layer structures 112a, 112b, 112c are configured in the above colors, a pink optical adhesive layer can be arranged between the bottommost multi-layer structure 112a and the middle multi-layer structure 112b, and a yellow optical adhesive layer can be arranged between the middle multi-layer structure 112b and the topmost multi-layer structure 112c, so as to filter out stray light of a specific color. It should be particularly pointed out that the number of multi-layer structures of the liquid crystal module 110 can also be one, and the pixel layer of the one multi-layer structure can be a red pixel layer, a green pixel layer, or a blue pixel layer, so the present disclosure is not limited by the number of multi-layer structures or the color of the pixel layer thereof.

[0062] Referring to Figure 2 , Figure 2 is Figure 1 a partial cross-sectional view of the touch module 120 in region 2. The touch module 120 is arranged on an end surface (not labeled separately) of the flat layer 111 of the liquid crystal module 110, and the touch module 120 comprises a first electrode layer 121, a light filtering side substrate 122, a second electrode layer 123, a first optically transparent adhesive layer 124, and a cover substrate 125. The first electrode layer 121 is connected to the flat layer 111 of the liquid crystal module 110. The light filtering side substrate 122 is connected to the first electrode layer 121, so that the first electrode layer 121 is located between the light filtering side substrate 122 and the liquid crystal module 110. The second electrode layer 123 is connected to the light filtering side substrate 122, so that the light filtering side substrate 122 is located between the second electrode layer 123 and the first electrode layer 121. The first optically transparent adhesive layer 124 is connected to the second electrode layer 123, so that the second electrode layer 123 is located between the first optically transparent adhesive layer 124 and the light filtering side substrate 122. The cover substrate 125 is connected to the first optically transparent adhesive layer 124, so that the first optically transparent adhesive layer 124 is located between the cover substrate 125 and the second electrode layer 123. In this way, the total number of layers of the touch module 120 can be reduced, and when external light is incident on the cholesteric liquid crystal display device 100, the loss of light caused by penetration can be reduced, thereby improving the reflectivity and contrast of the cholesteric liquid crystal display device 100.

[0063] Referring to Figure 3 , Figure 3 is Figure 2A top view of the first electrode layer 121, the filter-side substrate 122, and the second electrode layer 123. The first electrode layer 121 may include a plurality of first conductive strips 121a, which are arranged in parallel with each other. The second electrode layer 123 may include a plurality of second conductive strips 123a, which are arranged in parallel with each other. The first conductive strips 121a and the second conductive strips 123a may be orthogonally arranged. The first electrode layer 121 may be an emission electrode (Tx) layer, and the second electrode layer 123 may be a receiving electrode (Rx) layer.

[0064] The cholesterol liquid crystal display device 100 may further include a driving electrode, which may be electrically connected to the first electrode layer 121 and the liquid crystal module 110, respectively. When the first electrode layer 121 and the liquid crystal module 110 share the same driving electrode, the driving periods of the first electrode layer 121 and the liquid crystal module 110 may not overlap. Furthermore, the cholesterol liquid crystal display device 100 may further include an integrated circuit element, which may be electrically connected to the first electrode layer 121 and the liquid crystal module 110, respectively. That is, the circuitry of the first electrode layer 121 and the circuitry of the liquid crystal module 110 may be integrated into the same integrated circuit element.

[0065] The filter-side substrate 122 and the cover substrate 125 can be a glass substrate, a flexible polyester substrate, or a polyimide substrate, respectively, and the filter-side substrate 122 can include an active matrix structure or a passive matrix structure. This allows for adjustments to the materials or configurations of the filter-side substrate 122 and the cover substrate 125 to meet different application requirements.

[0066] Please refer to Figure 4 and Figure 5 , Figure 4 This is a cross-sectional schematic diagram of the cholesterol liquid crystal display device 200 according to the second embodiment of this disclosure. Figure 5 for Figure 4 A partial cross-sectional view of the touch module 220 in region 5 is shown. The cholesteric liquid crystal display device 200 includes a liquid crystal module 210 and a touch module 220. The touch module 220 includes a first electrode layer 221, a filter-side substrate 222, a second electrode layer 223, a first optically transparent adhesive layer 224, a cover substrate 225, a third electrode layer 226, a thin film substrate 227, a fourth electrode layer 228, and a second optically transparent adhesive layer 229. The first electrode layer 221, filter-side substrate 222, second electrode layer 223, first optically transparent adhesive layer 224, and cover substrate 225 of the second embodiment are the same as or similar to the first electrode layer 121, filter-side substrate 122, second electrode layer 123, first optically transparent adhesive layer 124, and cover substrate 125 of the first embodiment. The similarities will not be described again here.

[0067] The third electrode layer 226 can be connected to the first optically transparent adhesive layer 224, such that the first optically transparent adhesive layer 224 is located between the third electrode layer 226 and the second electrode layer 223. The thin film substrate 227 can be connected to the third electrode layer 226, such that the third electrode layer 226 is located between the thin film substrate 227 and the first optically transparent adhesive layer 224. The fourth electrode layer 228 can be connected to the thin film substrate 227, such that the thin film substrate 227 is located between the fourth electrode layer 228 and the third electrode layer 226. The second optically transparent adhesive layer 229 can be connected to the fourth electrode layer 228 and the cover substrate 225, such that the fourth electrode layer 228 is located between the second optically transparent adhesive layer 229 and the thin film substrate 227, and the second optically transparent adhesive layer 229 is located between the cover substrate 225 and the fourth electrode layer 228. In this way, a shielding structure can be formed, which reduces interference and improves the resolution of the touch module 220.

[0068] The third electrode layer 226 can include a plurality of third conductive strips arranged in parallel to each other, and the fourth electrode layer 228 can include a plurality of fourth conductive strips arranged in parallel to each other, and the third conductive strips and the fourth conductive strips can be arranged orthogonally, wherein the third electrode layer 226 can be an emitting electrode layer, and the fourth electrode layer 228 can be a receiving electrode layer, such that the cholesteric liquid crystal display device 200 of the second embodiment can be applied to an existing driving mode. The third conductive strips and the fourth conductive strips of the second embodiment can be arranged in the same or similar manner as the first conductive strips 121a and the second conductive strips 123a of the first embodiment, and thus will not be described here.

[0069] At least one of the first electrode layer 221, the second electrode layer 223, the third electrode layer 226, and the fourth electrode layer 228 can have a metal mesh structure. In this way, the conductivity, transparency, and flexibility of the electrodes can be improved, and the electrodes can be applied to large-area touch panels.

[0070] Please refer to Figure 6 , Figure 6 is a cross-sectional schematic view of a cholesteric liquid crystal display device 300 of a third embodiment of the present disclosure. The cholesteric liquid crystal display device 300 includes a liquid crystal module 310 and a touch module 320. The liquid crystal module 310 of the third embodiment is the same as or similar to the liquid crystal module 110 of the first embodiment, and thus will not be described here.

[0071] Please refer to Figure 7 , Figure 7 is Figure 6Figure 7 is a partial cross-sectional view of the touch module 320 in the area 7. The touch module 320 is disposed on one end surface of the flat layer 311 of the liquid crystal module 310, and the touch module 320 includes a filter side substrate 322, a first electrode layer 321, an optically transparent adhesive layer 324, a second electrode layer 323, and a cover substrate 325. The filter side substrate 322 is connected to the flat layer 311 of the liquid crystal module 310. The first electrode layer 321 is connected to the filter side substrate 322, such that the filter side substrate 322 is located between the first electrode layer 321 and the liquid crystal module 310. The optically transparent adhesive layer 324 is connected to the first electrode layer 321, such that the first electrode layer 321 is located between the optically transparent adhesive layer 324 and the filter side substrate 322. The second electrode layer 323 is connected to the optically transparent adhesive layer 324, such that the optically transparent adhesive layer 324 is located between the second electrode layer 323 and the first electrode layer 321. The cover substrate 325 is connected to the second electrode layer 323, such that the second electrode layer 323 is located between the cover substrate 325 and the optically transparent adhesive layer 324. In this way, the total number of layers of the touch module 320 can be reduced, and the loss of light due to penetration can be reduced when external light is incident on the cholesteric liquid crystal display device 300, thereby improving the reflectivity and contrast of the cholesteric liquid crystal display device 300.

[0072] Please refer to Figure 8 , Figure 8 for Figure 7 the filter side substrate 322, the first electrode layer 321, the optically transparent adhesive layer 324, the second electrode layer 323, and the cover substrate 325. The first electrode layer 321 can include a plurality of first conductive strips 321a arranged parallel to each other, the second electrode layer 323 can include a plurality of second conductive strips 323a arranged parallel to each other, and the first conductive strips 321a and the second conductive strips 323a can be arranged orthogonally, wherein the first electrode layer 321 can be a receiving electrode layer, and the second electrode layer 323 can be a transmitting electrode layer, such that the cholesteric liquid crystal display device 300 of the third embodiment can be adapted to the existing driving mode.

[0073] In summary, the cholesteric liquid crystal display device of the present disclosure can effectively combine the liquid crystal module and the touch module by reducing the total number of layers of the touch module, and can reduce the loss of light due to penetration of multiple layers of structures, thereby improving the reflectivity and contrast of the cholesteric liquid crystal display device, and further improving the optical quality of the cholesteric liquid crystal display device.

[0074] Although the present disclosure has been disclosed as above with the embodiments, it is not intended to limit the present disclosure, and any person skilled in the art can make various modifications and decorations without departing from the concept and scope of the present disclosure, and therefore the protection scope of the present disclosure shall be subject to the definition of the claims.

Claims

1. A cholesteric liquid crystal display device, characterized by comprising: Comprising: a liquid crystal module comprising a flat layer; and a touch module disposed on an end surface of the flat layer of the liquid crystal module, and the touch module comprising: a first electrode layer connected to the flat layer of the liquid crystal module; a filter side substrate connected to the first electrode layer, such that the first electrode layer is located between the filter side substrate and the liquid crystal module; a second electrode layer connected to the filter side substrate, such that the filter side substrate is located between the second electrode layer and the first electrode layer; a first optically transparent adhesive layer connected to the second electrode layer, such that the second electrode layer is located between the first optically transparent adhesive layer and the filter side substrate; and a cover substrate connected to the first optically transparent adhesive layer, such that the first optically transparent adhesive layer is located between the cover substrate and the second electrode layer.

2. The cholesterol liquid crystal display device according to claim 1, wherein The first electrode layer comprises a plurality of first conductive strips arranged in parallel with each other, the second electrode layer comprises a plurality of second conductive strips arranged in parallel with each other, and the plurality of first conductive strips and the plurality of second conductive strips are arranged orthogonally.

3. The cholesterol liquid crystal display device according to claim 1, wherein The touch module further comprises: a third electrode layer connected to the first optically transparent adhesive layer, such that the first optically transparent adhesive layer is located between the third electrode layer and the second electrode layer; a thin film substrate connected to the third electrode layer, such that the third electrode layer is located between the thin film substrate and the first optically transparent adhesive layer; a fourth electrode layer connected to the thin film substrate, such that the thin film substrate is located between the fourth electrode layer and the third electrode layer; and a second optically transparent adhesive layer connected to the fourth electrode layer and the cover substrate, such that the fourth electrode layer is located between the second optically transparent adhesive layer and the thin film substrate, and the second optically transparent adhesive layer is located between the cover substrate and the fourth electrode layer.

4. The cholesterol liquid crystal display device according to claim 3, wherein The third electrode layer comprises a plurality of third conductive strips arranged in parallel with each other, the fourth electrode layer comprises a plurality of fourth conductive strips arranged in parallel with each other, and the plurality of third conductive strips and the plurality of fourth conductive strips are arranged orthogonally.

5. The cholesterol liquid crystal display device according to claim 3, wherein At least one of the first electrode layer, the second electrode layer, the third electrode layer, and the fourth electrode layer has a metal mesh structure.

6. The cholesterol liquid crystal display device according to claim 1, wherein Further comprising a driving electrode, and the driving electrode is electrically connected to the first electrode layer and the liquid crystal module, respectively.

7. The cholesterol liquid crystal display device according to claim 1, wherein Further comprising an integrated circuit element, and the integrated circuit element is electrically connected to the first electrode layer and the liquid crystal module, respectively.

8. The cholesterol liquid crystal display device according to claim 1, wherein The filter side substrate and the cover substrate are a glass substrate, a flexible polyester substrate, or a polyimide substrate, respectively.

9. The cholesterol liquid crystal display device according to claim 1, wherein The filter side substrate comprises an active matrix structure or a passive matrix structure.

10. A cholesteric liquid crystal display device, characterized by comprising: Comprising: a liquid crystal module comprising a flat layer; and a touch module disposed on an end surface of the flat layer of the liquid crystal module, and the touch module comprising: a filter side substrate connected to the flat layer of the liquid crystal module; a first electrode layer connected to the filter side substrate, such that the filter side substrate is located between the first electrode layer and the liquid crystal module; an optically transparent adhesive layer connected to the first electrode layer, such that the first electrode layer is located between the optically transparent adhesive layer and the filter side substrate; and a second electrode layer connected to the optically transparent adhesive layer, such that the optically transparent adhesive layer is between the second electrode layer and the first electrode layer; and a cover substrate connected to the second electrode layer, such that the second electrode layer is between the cover substrate and the optically transparent adhesive layer.

11. The cholesterol liquid crystal display device according to claim 10, wherein The first electrode layer includes a plurality of first conductive strips arranged parallel to each other, the second electrode layer includes a plurality of second conductive strips arranged parallel to each other, and the plurality of first conductive strips and the plurality of second conductive strips are arranged orthogonally.

12. The cholesterol liquid crystal display device according to claim 10, wherein The filter-side substrate and the cover substrate are each a glass substrate, a flexible polyester substrate, or a polyimide substrate.

13. The cholesterol liquid crystal display device according to claim 10, wherein The filter-side substrate includes an active matrix structure or a passive matrix structure. The filter-side substrate includes an active matrix structure or a passive matrix structure.

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