TWI668610B - Micro-switch electronic writing board - Google Patents

Abstract

The invention discloses a micro-switch electronic writing board, comprising a micro-switch array module and a cholesteric liquid crystal module. The micro-switch array module has a plurality of micro-switching units, and the transparent conductive layer of each micro-switching unit is disposed on a surface of the first transparent substrate facing away from the light incident surface. The first transparent electrode layer is disposed on the first surface of the second transparent substrate and extends to the second surface of the second transparent substrate via the conductive hole. A surface of the first substrate of the first cholesteric liquid crystal module is provided with a second transparent electrode layer. The micro-switch array module is overlapped with the first cholesteric liquid crystal module by the second transparent substrate, so that the first cholesteric liquid crystal layer is interposed between the first substrate and the second transparent substrate.

Description

Micro-switch electronic tablet

The present invention relates to a microswitch electronic tablet, and more particularly to a microswitch electronic tablet capable of detecting a writing or wiping position.

Cholesteric liquid crystal is a chiral dopant added to a nematic liquid crystal to have a helical arrangement structure, and exhibits two different liquid crystal molecules arranged to reflect and penetrate under different voltage differences. The state is to achieve different light transmittance to achieve the display effect. Wherein, in the planar state, the incident light is reflected and developed; in the focal conic state, the incident light is mostly penetrated and a small portion is scattered; and in the vertical state, the incident light is completely penetrated.

Since the cholesteric liquid crystal is in a stable state in both the planar state and the focal conic state, when the voltage is turned off, the original state and the display screen are maintained, and only when it is changed to another state and display screen, it is required to be applied. Voltage, this low power consumption and memory characteristics, makes cholesterol liquid crystal the first choice for e-books. At the same time, this display mechanism is less affected by the spacing between the upper and lower plates, and has the potential and application to develop into a bistable flexible display. Compared with other types, such as TN type liquid crystal displays, the cholesteric liquid crystal display has the advantages of power saving, color display, dimming, and application to a bistable flexible display, and is widely used.

At present, most of the cholesterol liquid crystal writing boards are physically pressed to perform the transition state. However, when the cholesterol liquid crystal writing board detects the writing position or performs partial wiping, it is necessary to additionally arrange corresponding position sensing elements on the array substrate of the liquid crystal module. However, since the position sensing elements are to be disposed on the array substrate, a very large number of semiconductor mask processes are required. That is to say, in the cholesteric liquid crystal writing board having the position detecting function, the structure of the element responsible for position sensing is relatively complicated, so the manufacturing cost is relatively improved. Also, the yield is low due to the additional semiconductor manufacturing steps.

In view of the above, how to provide a cholesterol liquid crystal writing board that eliminates the semiconductor process and reduces the manufacturing cost, and has the function of detecting the writing position or the wiping position is an important subject.

It is an object of the present invention to provide a micro-switch electronic tablet that has the function of detecting a writing position or a wiping position in addition to the simple structure and low cost.

The invention provides a micro-switch electronic writing board comprising a micro-switch array module and a cholesteric liquid crystal module. The micro-switch array module has a plurality of micro-switch units arranged in an array, each micro-switch unit comprising a first transparent substrate, a transparent conductive layer, a second transparent substrate, a first transparent electrode layer and at least one spacer . The first light transmissive substrate has a light incident surface. The transparent conductive layer is disposed on a surface of the first transparent substrate facing away from the light incident surface. The second transparent substrate has a first surface facing the transparent conductive layer and a second surface opposite to the first surface, and the second transparent substrate has a conductive hole penetrating through the first surface and the second surface. The first transparent electrode layer is disposed on the first surface of the second transparent substrate and extends to the second surface of the second transparent substrate via the conductive hole. The spacer is disposed between the first transparent substrate and the second transparent substrate. The first cholesteric liquid crystal module comprises a first substrate and a first cholesteric liquid crystal layer. A surface of the first substrate is provided with a second transparent electrode layer. The first cholesteric liquid crystal layer is disposed on the second transparent electrode layer. The micro-switch array module is overlapped with the first cholesteric liquid crystal module by the second transparent substrate, so that the first cholesteric liquid crystal layer is interposed between the first substrate and the second transparent substrate.

In one embodiment, the other surface of the first substrate of the first cholesteric liquid crystal module is provided with a third transparent electrode layer disposed at intervals.

In an embodiment, the third transparent electrode layer is electrically connected to the first transparent electrode layer.

In one embodiment, the micro-switch electronic tablet further includes a second cholesteric liquid crystal module, and the second cholesteric liquid crystal module comprises a second substrate and a second cholesteric liquid crystal layer. A fourth transparent electrode layer is disposed on a surface of the second substrate. The second cholesteric liquid crystal layer is disposed on the fourth transparent electrode layer; wherein the second cholesteric liquid crystal module is overlapped with the first cholesteric liquid crystal module by the first substrate, so that the second cholesteric liquid crystal layer is first Between the substrate and the second substrate.

In one embodiment, the micro-switch electronic tablet further includes a second cholesteric liquid crystal module, and the second cholesteric liquid crystal module comprises a second substrate, a second cholesteric liquid crystal layer and a third transparent substrate. A fourth transparent electrode layer is disposed on a surface of the second substrate. The second cholesterol liquid crystal layer is disposed on On the fourth transparent electrode layer. The third transparent substrate is disposed on the second cholesteric liquid crystal layer, and a surface of the second cholesteric liquid crystal layer is disposed with a fifth transparent electrode layer disposed at intervals, wherein the second cholesteric liquid crystal module is provided by the first substrate And the third transparent substrate is overlapped with the first cholesteric liquid crystal module.

In an embodiment, the fifth transparent electrode layer is electrically connected to the first transparent electrode layer.

In an embodiment, the material of the first transparent substrate, the second transparent substrate, or the first substrate is plastic or glass.

In an embodiment, the material of the second substrate is plastic or glass.

In an embodiment, the material of the second substrate or the third transparent substrate is plastic or glass.

In an embodiment, the first transparent substrate is a glass substrate, and the thickness of the glass substrate is between 0.1 mm and 0.35 mm.

In an embodiment, the material of the transparent conductive layer, the first transparent electrode layer, or the second transparent electrode layer is a transparent conductive material or graphene.

In an embodiment, the material of the third transparent electrode layer or the fourth transparent electrode layer is a transparent conductive material or graphene.

In an embodiment, the material of the third transparent electrode layer, or the fourth transparent electrode layer, or the fifth transparent electrode layer is a transparent conductive material or graphene.

In one embodiment, the micro-switch electronic tablet further includes a voltage control circuit electrically connected to the transparent conductive layer and the second transparent electrode layer, respectively.

In one embodiment, the micro-switch electronic tablet further includes a voltage control circuit electrically connected to the transparent conductive layer, the second transparent electrode layer and the fourth transparent electrode layer, respectively.

As described above, in the micro-switch electronic tablet of the present invention, a micro-switch array module and a cholesteric liquid crystal module are included. The micro-switching array module has a plurality of micro-switching units arranged in an array. The transparent conductive layer of each micro-switching unit is disposed on a surface of the first transparent substrate facing away from the light incident surface, and the first transparent electrode layer is disposed on the second transparent substrate. The first surface is extended to the second surface of the second transparent substrate via the conductive hole; wherein the micro-switch array module is overlapped with the cholesteric liquid crystal module by the second transparent substrate, so that The cholesteric liquid crystal layer is interposed between the first substrate and the second transparent substrate. Therefore, since the structure of the micro-switch array module and the cholesteric liquid crystal module is relatively simple and the manufacturing cost is not high; and the micro-switch array module and the cholesteric liquid crystal module are superposed on each other, the detected writing position or Wipe position The function of the micro-switch electronic tablet is quite simple. Therefore, the micro-switch electronic writing board of the present invention has the advantages of simple manufacturing process and low manufacturing cost, and at the same time has the function of detecting the writing position or the wiping position.

E‧‧‧Micro Switch Electronic Writing Board

1‧‧‧Micro Switch Array Module

10‧‧‧Micro Switch Unit

11‧‧‧First transparent substrate

111‧‧‧Light incident surface

112, 211, 212, 311, 312, 341‧‧‧ surface

12‧‧‧Transparent conductive layer

13‧‧‧Second transparent substrate

131‧‧‧ first surface

132‧‧‧ second surface

133‧‧‧Electrical hole

14‧‧‧First transparent electrode layer

15‧‧‧ spacers

2‧‧‧First Cholesterol LCD Module

21‧‧‧First substrate

22‧‧‧Second transparent electrode layer

23‧‧‧First Cholesterol Liquid Crystal Layer

231, 331‧‧‧ LCD control area

24‧‧‧ third transparent electrode layer

3‧‧‧Second Cholesterol LCD Module

31‧‧‧second substrate

32‧‧‧fourth transparent electrode layer

33‧‧‧Second Cholesterol Liquid Crystal Layer

34‧‧‧ Third transparent substrate

35‧‧‧ fifth transparent electrode layer

4‧‧‧Voltage control circuit

5‧‧‧ Backplane

A-A‧‧‧ Straight line

P‧‧‧ writing pen

T‧‧‧ writing track

V1‧‧‧ first voltage

V2‧‧‧second voltage

V3‧‧‧ third voltage

1 is a schematic view showing the application of a micro-switch electronic tablet according to an embodiment of the present invention.

2 is a partially exploded perspective view of an embodiment of a microswitch electronic tablet of the present invention.

3A is a cross-sectional, exploded view of the microswitch electronic tablet of FIG. 2 taken along line A-A.

FIG. 3B is a schematic view showing the structure of the micro-switch electronic tablet shown in FIG. 3A after being combined and pressed. FIG.

FIG. 3C is a schematic structural view of the micro-switch electronic tablet shown in FIG. 3A or FIG. 3B provided with a back plate. FIG.

4A and 4B are schematic structural views of another embodiment of the micro-switch electronic tablet provided by the present invention.

5A and FIG. 5B are schematic diagrams showing the structure of still another embodiment of the micro-switch electronic tablet provided by the present invention.

Hereinafter, a micro-switch electronic tablet according to various embodiments of the present invention will be described with reference to the related drawings, wherein like elements will be described with the same reference numerals.

It should be noted that all directional indications (such as up, down, left, right, front, back, ...) in the embodiments of the present invention are only used to explain in a certain posture (as shown in the attached drawings). The relative positional relationship between the components, the motion situation, etc., if the specific posture changes, the directional indication will also change accordingly.

The microswitch electronic tablet of the following embodiment is exemplified by a large-sized electronic blackboard (or whiteboard) applied to an interactive writing system such as a conference or a teaching, but the present invention is not limited thereto. The micro-switch electronic tablet provided by each embodiment of the present invention utilizes the characteristics of cholesteric liquid crystal, and thus is a bistable display device. When the micro-switch electronic tablet displays an image or a picture, no additional input is required. The power supply, this image or picture will always be retained, and only need to input additional power when changing to another state or display, so the micro-switch electronic tablet is a relatively power-saving electronic device.

The micro-switch electronic tablet provided by the following embodiments of the present invention utilizes the characteristics of cholesteric liquid crystal, and thus is a bistable display device. When the micro-switch electronic tablet displays an image or a picture, no additional input is required. The power supply, this image or picture will be retained all the time, and only need to input additional power when changing to another state or display, so the micro-switch electronic tablet is a low-cost and power-saving electronic device.

1 is a schematic view showing the application of a micro-switch electronic tablet according to an embodiment of the present invention. 2 is a partially exploded perspective view of an embodiment of the microswitch electronic tablet of the present invention, and FIG. 3A is a cross-sectional exploded view of the microswitch electronic tablet shown in FIG. 2 along a line AA, and FIG. 3A shows the structure of the micro-switch electronic tablet after being combined and pressed. The microswitch electronic tablet of the present invention is, for example but not limited to, a cell phone, a tablet, or an electronic whiteboard, or other display device capable of displaying an image. As shown in FIG. 1, the micro-switch electronic tablet E of the present embodiment is exemplified by a large-sized electronic blackboard (or whiteboard) applied to a conference or teaching system, but the present invention is not limited thereto. It is particularly worth mentioning that, for convenience of explanation, the microswitch electronic tablet E of the following embodiments has different compositions depending on the embodiments. The microswitch electronic tablet E of FIG. 1 displays a writing track T on its light incident surface 111.

As shown in FIG. 2, the micro-switch electronic tablet E of the embodiment includes a micro-switch array module 1 and a first cholesterol liquid crystal module 2. The micro-switch array module 1 has a plurality of micro-switch units 10 arranged in an array, which are arranged in a two-dimensional array manner, but the present invention is not limited to the two-dimensional array method.

As shown in FIG. 3A , each micro-switch unit 10 includes a first transparent substrate 11 , a transparent conductive layer 12 , a second transparent substrate 13 , a first transparent electrode layer 14 , and at least one spacer 15 .

The first light transmissive substrate 11 has a light incident surface 111. The light incident surface 111 of the present embodiment is the upper surface of the first transparent substrate 11 and is also the surface of the micro-switched electronic tablet E facing the user, and may also be referred to as a writing surface or a display surface on which the user can write To generate a writing track T. It should be noted that the user can directly write (press) on the light incident surface (writing surface) 111 to generate the writing track T; or, the light incident surface 111 can be provided with other film layers, which can be used by the user. Writing (pressing) above the layer produces a writing track T. In some embodiments, a protective film layer or a protective substrate may be further disposed on the light incident surface 111 to protect the microswitch electronic tablet E.

In each of the micro-switch units 10, the transparent conductive layer 12 is disposed on the surface 112 of the first light-transmitting substrate 11 facing away from the light incident surface 111. Here, the surface 112 is the other surface of the first light-transmitting substrate 11. The second transparent substrate 13 has a first surface 131 facing the transparent conductive layer 12 and a second surface 132 opposite to the first surface 131 , and the second transparent substrate 13 has a first surface 131 and a second surface 132 . One of the conductive holes 133. As the name implies, the purpose of the conductive vias 133 is for electrical conduction. In this embodiment, if the second transparent substrate 13 is made of glass, the second transparent substrate 13 can be opened by laser. If the second transparent substrate 13 is plastic, etching can be utilized. The process is etched to obtain conductive holes 133 extending through the first surface 131 and the second surface 132. The first transparent electrode layer 14 is disposed on the first surface 131 of the second transparent substrate 13 and extends to the second surface 132 of the second transparent substrate 13 via the conductive hole 133 to be on the second surface 132. The first transparent electrode layer 14 is formed in a spaced arrangement. Here, in each of the microswitch units 10, the transparent conductive layer 12, the conductive vias 133, and the first transparent electrode layer 14 have a one-to-one correspondence relationship. In addition, at least one spacer 15 is disposed between the first transparent substrate 11 and the second transparent substrate 13 such that a gap is formed between the first transparent substrate 11 and the second transparent substrate 13 to further form the transparent conductive layer 12 . There is a gap between the first transparent electrode layer 14 on the first surface 131 of the second transparent substrate 13. Specifically, the spacer 15 of the embodiment is disposed on the outer side of the micro-switch unit 10 such that a gap is formed between the transparent conductive layer 12 and the first transparent electrode layer 14 to form the micro-switch unit 10. In various embodiments, the spacer 15 may also be disposed inside the transparent conductive layer 12 and the first transparent electrode layer 14.

As shown in FIG. 3A, the first cholesteric liquid crystal module 2 includes a first substrate 21, a second transparent electrode layer 22, and a first cholesteric liquid crystal layer 23. The second transparent electrode layer 22 is disposed on a surface of the first substrate 21 facing the first cholesteric liquid crystal layer 23. The second transparent electrode layer 22 can be disposed on the surface 211 of the first substrate 21 facing the first cholesteric liquid crystal layer 23, and the first cholesteric liquid crystal layer 23 is disposed on the second transparent electrode layer 22 and located at The second transparent electrode layer 22 is between the first transparent electrode layer 14. The aforementioned "comprehensiveness" means that the second transparent electrode layer 22 includes a common electrode of the entire surface, and the common electrode covers the majority of the surface of the first substrate 21 facing the first cholesteric liquid crystal layer 23. In different embodiments, the second transparent electrode layer 22 may be disposed on the surface of the first substrate 21 facing the first cholesteric liquid crystal layer 23 at intervals, and the invention is not limited thereto.

As shown in FIG. 3B, the micro-switch array module 1 of the present embodiment overlaps with the first cholesteric liquid crystal module 2 by the second transparent substrate 13 so that the first cholesteric liquid crystal layer 23 is first. Between the substrate 21 and the second transparent substrate 13. In some embodiments, the microswitch array module 1 and the first biliary The sterol liquid crystal module 2 can be re-adhered with an adhesive material to enhance the structural stability. When the transparent conductive layer 12 is pressed down toward the first transparent electrode layer 14 and contacts the first transparent electrode layer 14, the micro-switch unit 10 is turned on, and the electrical signal can be transmitted through the transparent conductive layer 12 of the micro-switch unit 10. The first transparent electrode layer 14 is transferred to the first transparent electrode layer 14 via the conductive holes 133 to the first transparent electrode layer 14 on the second surface 132 of the second transparent substrate 13.

In FIG. 3B, the second transparent substrate 13 is disposed opposite to the first substrate 21. The first cholesteric liquid crystal layer 23 has a plurality of cholesteric liquid crystal molecules (not shown) which are filled and disposed between the second transparent substrate 13 and the first substrate 21. In addition, the micro-switch electronic tablet E can further include a sealing layer (not shown), and the sealing layer can be a frame glue, and is disposed between the second transparent substrate 13 and the first substrate 21 to seal the second light transmission. The outer periphery of the substrate 13 and the first substrate 21 has a gap between the second transparent substrate 13 and the first substrate 21. An accommodating space can be formed by the second transparent substrate 13 and the first substrate 21 and the sealing layer, so that cholesteric liquid crystal molecules can be filled in the accommodating space to form the first cholesteric liquid crystal layer 23. The first cholesteric liquid crystal layer 23 of the present embodiment includes a plurality of liquid crystal control regions 231, and each of the liquid crystal control regions 231 is disposed corresponding to each of the micro-switch units 10. In other words, the range of each liquid crystal control region 231 is defined by each micro-switch unit 10, and the cholesteric liquid crystal molecules of the corresponding liquid crystal control region 231 can be controlled by the micro-switch unit 10. When the voltage signal is transmitted between the first transparent electrode layer 14 and the second transparent electrode layer 22 corresponding to the micro-switch unit 10 and a voltage difference is generated to generate an electric field, the liquid crystal molecules of the corresponding liquid crystal control region 231 can be controlled to rotate. The material of the transparent conductive layer 12, the first transparent electrode layer 14, or the second transparent electrode layer 22 of the present embodiment may be a transparent conductive material (for example, ITO or IZO) or graphene, and is not limited.

In this embodiment, the first transparent substrate 11 is a flexible transparent substrate, and the first transparent substrate 11 and the second transparent substrate 13 are respectively light transmissive substrates, but the first substrate 21 is a light reflective substrate or A light absorbing substrate that reflects or absorbs incoming light. In addition, the materials of the first transparent substrate 11, the second transparent substrate 13, or the first substrate 21 may be plastic or glass, respectively. When the first transparent substrate 11 is a glass substrate, the thickness thereof may be between 0.1 mm and 0.35 mm (0.1 mm ≦ d ≦ 0.35 mm), so that the first transparent substrate 11 has a bendable property. Specifically, generally, a thick glass substrate (for example, 0.5 mm to 1.5 mm) has a high hardness and is difficult to be bent or deformed by pressing, but the first transparent substrate 11 has a thickness of only 0.1 mm and 0.35 mm. Glass, it can be flexible and has Press and write functions. In some embodiments, the first light transmissive substrate 11 can be, for example but not limited to, a thinned thickness between 0.1 mm and 0.35 mm using a Chemical Mechanical Planarization (CMP) process. In some embodiments, if the second transparent substrate 13 and the first substrate 21 are also flexible, the micro-switch electronic tablet E can be fabricated into a curved writing board or a display.

The first cholesteric liquid crystal module 2 can display a color correspondingly. Specifically, the micro-switching electronic tablet E can be formulated with different amounts of optically active agents in the first cholesteric liquid crystal layer 23 of the first cholesteric liquid crystal module 2 to formulate, for example, red (R), green (G) or Blue (B) and other colors. Here, the color corresponding to the display of the first cholesteric liquid crystal module 2 may be selected from, for example, but not limited to, one of red, green, and blue, or the color of other visible light. Since the cholesteric liquid crystal achieves a special arrangement by adding an optically active agent to the nematic liquid crystal, and using the cholesteric liquid crystal molecules, it can exhibit at least a Focal conic state under different voltage differences, physical pressures, and/or temperatures. Several different steady-state or transient states, such as the planar state and the homeotropic state, to achieve display or clearing effects. Therefore, the reflected portion of the light and/or part of the light can pass through the cholesteric liquid crystal by changing the axial direction of the helical structure of the cholesteric liquid crystal. That is, the display, writing, and even wiping function of the micro-switching electronic tablet E can be achieved by different light reflectance or transmittance of the cholesteric liquid crystal molecules in different states.

The micro-switch electronic tablet E of the embodiment further includes a voltage control circuit 4 electrically connected to the micro-switch array module 1 and the first cholesteric liquid crystal module 2, respectively. The voltage control circuit 4 is electrically connected to the transparent conductive layer 12 of each micro-switch unit 10 and the second transparent electrode layer 22 of the first cholesteric liquid crystal module 2 . When the micro-switch unit 10 is pressed (FIG. 3B) to bring the transparent conductive layer 12 into contact with the first transparent electrode layer 14, thereby making the micro-switch unit 10 conductive, the voltage control circuit 4 can pass through the transparent conductive layer of the micro-switch unit 10. 12 transmits the first voltage V1 to the first transparent electrode layer 14, and turns the cholesteric liquid crystal molecules of the corresponding first cholesteric liquid crystal layer 23 into a state, thereby displaying the writing trajectory T or wiping the writing trajectory T.

If the user wants to write text or draw a pattern on the micro-switch electronic tablet E, the writing mode can be selected, and the finger, the writing pen P (Fig. 3B) or other hard objects are written on the micro-switching electronic writing board E, At this time, the micro-switch unit 10 corresponding to the writing portion (pressing portion) will be brought into contact with the first transparent electrode layer 14 by pressing, and the voltage control circuit 4 can be turned on. The transparent conductive layer 12 of the switching unit 10 transmits the first voltage V1 to the first transparent electrode layer 14, and then transmits the first transparent electrode layer 14 to the lower surface of the second transparent substrate 13 via the conductive hole 133, and the voltage control circuit 4 also The second voltage V2 (for example, a common voltage, such as but not limited to 0 volts) is transmitted to the second transparent electrode layer 22, and the voltage difference between the first transparent electrode layer 14 and the second transparent electrode layer 22 (V1 - V2) The generated electric field will force the cholesteric liquid crystal molecules of the corresponding first cholesteric liquid crystal layer 23 to be shifted from the focal conic state to the planar state, whereby the writing trajectory T can be displayed. Here, the first voltage V1 minus the second voltage V2 is equal to the writing voltage.

For example, in the micro-switch electronic tablet E of the embodiment, when the micro-switch unit 10 is not pressed and the first transparent electrode layer 14 and the second transparent electrode layer 22 do not generate a voltage difference, the first cholesterol liquid crystal layer The cholesterol liquid crystal molecules of 23 are in a focal conic state arrangement. At this time, most of the incident light can pass through the first transparent substrate 11 and the second transparent substrate 13 and penetrate the first cholesteric liquid crystal layer 23, and a small portion of the incident light will be scattered, so that the user can see the micro-switching electrons. The background color of the writing board E, such as black. When the user writes on the micro-switch electronic tablet E with a finger, a writing pen P or other hard object to turn on the corresponding micro-switch unit 10, the first voltage V1 will be transmitted to the first transparent via the turned-on micro-switch unit 10. The electrode layer 14 is such that an electric field generated by a voltage difference (V1 - V2) between the first transparent electrode layer 14 and the second transparent electrode layer 22 causes the corresponding cholesteric liquid crystal molecules to be in a plane from the original focal conic state. State arrangement. At this time, at the pressing place (that is, the recess of the first transparent substrate 11), part of the incident light rays are Bragg reflected, and the reflected light rays (having a specific wavelength) are emitted from the light incident surface 111. At the same time, the micro-switching electronic tablet E will display the color of the reflected light at the pressing position, thereby displaying the writing track T (Fig. 1), and the writing track T will present the color corresponding to the first cholesterol liquid crystal module 2 ( For example red). Therefore, if the user writes a text or draws a pattern on the micro-switch electronic tablet E to generate a writing track T, the writing track T will present a color corresponding to the reflected light, that is, the color of the micro-switched electronic tablet E corresponding to the display.

On the other hand, if the user wants to wipe the writing track T on the micro-switch electronic tablet E, the wiping mode (which can be partially or completely wiped) can be selected. Here, the first voltage V1 supplied from the voltage control circuit 4 minus the second voltage V2 is equal to the wiping voltage. When the user presses (back and forth) on the writing track T to be wiped by the writing pen P or other wiping tool, the micro-switching unit 10 corresponding to the wiping position at this time will cause the transparent conductive layer 12 of the micro-switching unit 10 to be pressed. And the first transparent electrode layer 14 Contact and conduction. At this time, the first voltage V1 transmitted by the voltage control circuit 4 to the transparent conductive layer 12 will be conducted to the first transparent electrode layer 14 via the turned-on micro-switch unit 10, and then transferred to the second transparent substrate 13 via the conductive via 133. The first transparent electrode layer 14 of the surface. At this time, the electric field generated by the voltage difference (V1 - V2) between the first transparent electrode layer 14 and the second transparent electrode layer 22 will force the corresponding cholesteric liquid crystal molecules to change from a planar state to a focal conic state. Clear (wipe) the corresponding writing track T. Here, the difference between the first voltage V1 and the second voltage V2 is the wiping voltage.

In other words, in the micro-switch electronic tablet E of the present embodiment, when the user sees the colored writing track T on the light incident surface 111, if the user selects the wiping mode and uses the writing pen P (or the wiping pen) Wiping on the writing track T to turn on the corresponding micro-switch unit 10, at which time the first voltage V1 transmitted by the voltage control circuit 4 will be transmitted to the first transparent electrode layer 14 via the micro-switch unit 10, so that the first transparent electrode layer The electric field generated by the voltage difference (V1 - V2) between the 14 and the second transparent electrode layer 22 allows the corresponding cholesteric liquid crystal molecules to be in a focal conic state from the original planar state. At this time, at the wiping place (ie, the recess of the first transparent substrate 11), most of the incident light may pass through the first transparent substrate 11 and the second transparent substrate 13 and penetrate the first cholesteric liquid crystal layer 23, thus The user can see the background color of the micro-switch electronic tablet E at the wiping place, thereby clearing the writing track T of the wiping place.

In addition, in some embodiments, the voltage control circuit 4 can also be directly electrically connected to all of the first transparent electrode layers 14. In this way, when the user switches the micro-switch electronic tablet E to a full-clear mode by pressing a full clear button (virtual or physical button, not shown) on the micro-switch electronic tablet E, the voltage The control circuit 4 can directly transmit a clear voltage to all of the first transparent electrode layers 14 (without passing through the micro-switch unit 10), thereby driving the cholesteric liquid crystals of all the liquid crystal control regions 231 to the focal conic state. Clear all writing tracks T on the entire screen. Of course, the voltage control circuit 4 can also directly send another type of clear voltage to the second transparent electrode layer 22, thereby clearing all the writing tracks T on the entire screen.

In the micro-switch electronic tablet E of the embodiment, the structure of the micro-switch array module 1 and the first cholesteric liquid crystal module 2 is relatively simple, and the manufacturing cost is relatively low. Moreover, the micro-switch array module 1 and the first cholesteric liquid crystal module 2 of the embodiment need only be superimposed on each other without precise positioning, and the micro-switch array module 1 can control the display of the first cholesteric liquid crystal module 2, and The process is also quite simple. In other words, when the micro-switch unit 10 is pressed to make the transparent conductive layer 12 and the first transparent electrode When the layer 14 is in contact, and the micro-switch unit 10 is turned on, the voltage control circuit 4 can transmit the control voltage (the first voltage V1) to the first transparent electrode layer 14 via the transparent conductive layer 12 of the micro-switch unit 10, so that the corresponding The cholesteric liquid crystal molecules of a cholesteric liquid crystal layer 23 are in a state of transition, whereby the writing trajectory T or the wiping writing trajectory T can be displayed. Therefore, the micro-switch electronic tablet E having the function of detecting the writing position or the wiping position of the embodiment has a relatively simple structure, a relatively low manufacturing cost, and a relatively simple manufacturing process.

Referring to FIG. 3C, the micro-switch electronic tablet E of the present embodiment has substantially the same component composition and connection relationship as the micro-switch electronic tablet of the foregoing embodiment. The difference is that the first substrate 21 of the embodiment is a light-transmitting substrate, and the micro-switching electronic tablet E can further include a backing plate 5 disposed on the first substrate 21 facing away from the first cholesteric liquid crystal layer 23 s surface. Here, the back plate 5 is disposed on the surface 212 of the first substrate 21. The backing plate 5 may be a black light absorbing plate or a light absorbing layer containing the light absorbing layer, or the backing plate 5 may also be white or include a light reflecting layer. When the backing plate 5 is a black light absorbing plate or contains a light absorbing layer, it absorbs light passing through the surface 212, making the microswitch electronic tablet E a blackboard. In some embodiments, the material of the black light absorbing plate (or light absorbing film) may be the same as the material of the black matrix of the liquid crystal display device. In addition, when the back sheet 5 is a white light reflecting plate or contains a light reflecting layer, it reflects light passing through the surface 212, so that the microswitch electronic tablet E becomes a white board. In some embodiments, the material of the white light reflecting plate (or white light reflecting film) may include, for example, a metal, a metal oxide, a high reflective paint (white paint), or a combination thereof, which is not limited in the present invention. Alternatively, in different embodiments, the color of the back sheet 5 is not limited to black or white, and may be other colors or a combination of colors, and is not limited.

Please refer to FIG. 4A and FIG. 4B , which are respectively schematic structural diagrams of another embodiment of the micro-switch electronic tablet provided by the present invention. The micro-switch electronic tablet E of the present embodiment has substantially the same component composition and connection relationship as the micro-switch electronic tablet E of the foregoing embodiment. The difference is that the micro-switch electronic tablet E of the embodiment is further on the other surface 212 of the first substrate 21 of the first cholesteric liquid crystal module 2 except for the first cholesteric liquid crystal module 2 of the foregoing embodiment. A third transparent electrode layer 24 having a spaced arrangement is disposed, and the third transparent electrode layer 24 is electrically connected to the first transparent electrode layer 14 (FIG. 4B).

In addition, the micro-switch electronic tablet E of the embodiment further includes a second cholesterol. The liquid crystal module 3 and the second cholesteric liquid crystal module 3 are disposed to overlap with the first cholesteric liquid crystal module 2. The second cholesteric liquid crystal module 3 is disposed on a side of the first cholesteric liquid crystal module 2 away from the micro-switch array module 1, and the color corresponding to the first cholesteric liquid crystal module 2 and the second cholesteric liquid crystal module 3 is displayed. different. Here, it is assumed that the color corresponding to the first cholesteric liquid crystal module 2 is red, and the color corresponding to the second cholesteric liquid crystal module 3 is green. As shown in FIG. 4A and FIG. 4B, the second cholesteric liquid crystal module 3 includes a second substrate 31, a fourth transparent electrode layer 32, and a second cholesteric liquid crystal layer 33. Here, the fourth transparent electrode layer 32 is a common electrode, and is disposed integrally on the surface 311 of the second substrate 31 facing the second cholesteric liquid crystal layer 33, and the second cholesteric liquid crystal layer 33 is disposed on the fourth transparent electrode layer. 32. In addition, since the first substrate 21 faces the third transparent electrode layer 24 disposed on the surface 212 of the second cholesteric liquid crystal layer 33, the second cholesteric liquid crystal layer 33 is sandwiched between the third transparent electrode layer 24 and the fourth transparent layer. Between the electrode layers 32. Here, the second cholesteric liquid crystal module 3 is overlapped with the first cholesteric liquid crystal module 2 by the first substrate 21 such that the second cholesteric liquid crystal layer 33 is interposed between the first substrate 21 and the second substrate 31. between. In addition, the second cholesteric liquid crystal layer 33 may include a plurality of liquid crystal control regions 331, and each of the liquid crystal control regions 331 and each of the micro-switching units 10, the transparent conductive layers 12, the first transparent electrode layers 14, and the respective spacers The three transparent electrode layers 24 are correspondingly disposed.

The first substrate 21 of the present embodiment is a light-transmitting substrate, but the second substrate 31 is a light-absorbing substrate or a light-reflecting substrate. Of course, in different embodiments, as in FIG. 3C, when the second substrate 31 is a light-transmitting substrate, a back plate may be disposed on the surface 312 of the second substrate 31 away from the second cholesteric liquid crystal layer 33. In addition, each of the first transparent electrode layers 14 of the present embodiment is electrically connected to each of the corresponding third transparent electrode layers 24 (FIG. 4B). Therefore, the voltage transmitted to the first transparent electrode layer 14 can be simultaneously transmitted to the corresponding ones. The third transparent electrode layer 24. In addition, the voltage control circuit 4 of the present embodiment is electrically connected to the transparent conductive layer 12, the second transparent electrode layer 22, and the fourth transparent electrode layer 32, respectively. Here, the first voltage V1 transmitted by the voltage control circuit 4 to the transparent conductive layer 12 may be a writing voltage or a wiping voltage, and the voltage control circuit 4 transmits the second voltage to the second transparent electrode layer 22 and the fourth transparent electrode layer 32. V2 and the third voltage V3 may be a common voltage (for example, 0 volt), a writing voltage, or a wiping voltage, depending on writing or wiping. In addition, the material of the first transparent substrate 11, the second transparent substrate 13, the first substrate 21, or the second substrate 31 of the present embodiment may be plastic or glass, and the transparent conductive layer 12 and the first transparent electrode layer 14 The material of the second transparent electrode layer 22, the third transparent electrode layer 24, or the fourth transparent electrode layer 32 may be a transparent conductive material. Or graphene, no limitation.

As shown in FIG. 4B, in the micro-switch electronic tablet E of the present embodiment, when the micro-switch unit 10 is pressed to turn on the micro-switch unit 10, the voltage control circuit 4 can apply the first voltage V1 via the micro-switch unit 10. Up to the first cholesteric liquid crystal module 2 and/or the second cholesteric liquid crystal module 3, the writing trajectory T or the wiping writing trajectory T is displayed accordingly. Specifically, it is assumed that the user writes on the micro-switch electronic tablet E, and the writing track T is to be red when the first cholesteric liquid crystal module 2 corresponds, and when the stylus pen P is pressed on the light incident surface 111, When the micro-switch unit 10 corresponding to the pressing is turned on, the first voltage V1 can be transmitted to the first transparent electrode layer 14 of the second surface 132 of the second transparent substrate 13 via the transparent conductive layer 12 of the micro-switch unit 10, Thereby, the cholesteric liquid crystal molecules corresponding to the first cholesteric liquid crystal module 2 are controlled to be in a planar state, so that the writing trajectory shows a corresponding red color. Here, the difference between the first voltage V1 and the second voltage V2 is a writing voltage. At this time, the first voltage V1 is also transmitted to the third transparent electrode layer 24 via the first transparent electrode layer 14. In order not to display the green corresponding to the second cholesteric liquid crystal module 3, the voltage control circuit 4 does not transmit the common Voltage, but transmitting the same third voltage V3 as the first voltage V1 to the fourth transparent electrode layer 32 (ie, the third voltage V3 is equal to the first voltage V1), so that the third transparent electrode layer 24 and the fourth corresponding to the pressing portion The voltage difference of the transparent electrode layer 32 is 0, whereby the conduction of the micro-switch unit 10 does not affect the liquid crystal control region 331 of the second cholesteric liquid crystal layer 33 of the corresponding second cholesteric liquid crystal module 3, and therefore, the writing trajectory T is not The green color corresponding to the second cholesterol liquid crystal module 3 is displayed.

Conversely, if the user selects green, although the first voltage V1 can be transmitted to the first transparent electrode layer 14 via the micro-switch unit 10, since the voltage control circuit 4 does not transmit the common voltage, it transmits the first voltage. When the voltage difference between the first transparent electrode layer 14 and the second transparent electrode layer 22 is 0, the writing track T does not present the first cholesteric liquid crystal module 2 Corresponding red; however, the first voltage V1 is transmitted to the third transparent electrode layer 24 via the first transparent electrode layer 14, such that the third transparent electrode layer 24 and the fourth transparent electrode layer 32 (common voltage) have The voltage difference causes the cholesteric liquid crystal molecules corresponding to the second cholesteric liquid crystal layer 33 to be in a planar state, whereby the writing trajectory T shows the green color corresponding to the second cholesteric liquid crystal module 3. In addition, if the cholesteric liquid crystal molecules in the first cholesteric liquid crystal module 2 and the second cholesteric liquid crystal module 3 are in a planar state at the same time, the writing trajectory T will display a mixed color of red and green (blue). This allows the microswitch electronic tablet E to display a colorful writing track T. Similarly, in the wiping mode, the user can also select to wipe the writing track of a certain color according to the above control principle, or select the writing track of the mixed color of the two colors to be wiped off. For the specific control method, refer to the above description. .

In addition, in some embodiments, a third cholesteric liquid crystal module (not shown) may be stacked on the side of the second cholesteric liquid crystal module 3 away from the first cholesteric liquid crystal module 2, and the third cholesterol may be made. The colors of the liquid crystal module, the first cholesteric liquid crystal module 2 and the second cholesteric liquid crystal module 3 are different from each other, thereby making the color of the writing trajectory T more diverse.

5A and FIG. 5B are schematic diagrams showing the structure of still another embodiment of the micro-switch electronic tablet provided by the present invention. As shown in FIGS. 5A and 5B, the micro-switch electronic tablet E of the present embodiment has substantially the same component composition and connection relationship as the micro-switch electronic tablet E of the foregoing embodiment. The difference is that the micro-switch electronic tablet E of the embodiment further includes a second cholesteric liquid crystal module 3, and the second cholesteric liquid crystal module 3 is overlapped with the first cholesteric liquid crystal module 2.

Here, the color corresponding to the first cholesteric liquid crystal module 2 is red, and the color corresponding to the second cholesteric liquid crystal module 3 is green. As shown in FIG. 5A and FIG. 5B, the second cholesteric liquid crystal module 3 includes a second substrate 31, a fourth transparent electrode layer 32 and a second cholesteric liquid crystal layer 33, a third transparent substrate 34 and a fifth transparent layer. Electrode layer 35. Here, the fourth transparent electrode layer 32 may be a common electrode, and is disposed integrally on the surface 311 of the second substrate 31 facing the second cholesteric liquid crystal layer 33, and the second cholesteric liquid crystal layer 33 is disposed on the fourth transparent electrode. On layer 32. In addition, the third transparent substrate 34 is disposed on the second cholesteric liquid crystal layer 33, and the third transparent substrate 34 is disposed on a surface 341 of the second luminescent liquid crystal layer 33 with a fifth transparent electrode layer 35 disposed at intervals. Therefore, the second cholesteric liquid crystal layer 33 is interposed between the fifth transparent electrode layer 35 and the fourth transparent electrode layer 32. The second cholesteric liquid crystal module 3 is superposed on the first cholesteric liquid crystal module 2 by the first substrate 21 and the third transparent substrate 34 . In addition, the second cholesteric liquid crystal layer 33 may include a plurality of liquid crystal control regions 331, and each of the liquid crystal control regions 331 and each of the micro-switching units 10, the transparent conductive layers 12, the first transparent electrode layers 14, and the respective intervals The five transparent electrode layers 35 are correspondingly disposed.

The first substrate 21 of the present embodiment is a light-transmitting substrate, but the second substrate 31 is a light-absorbing substrate or a light-reflecting substrate. Of course, in different embodiments, as in FIG. 3C, when the second substrate 31 is a light-transmitting substrate, a back may be disposed on the surface 312 of the second substrate 31 away from the second cholesteric liquid crystal layer 33. board. In addition, the fifth transparent electrode layer 35 of the embodiment is electrically connected to the corresponding first transparent electrode layer 14 . Therefore, the voltage transmitted to the first transparent electrode layer 14 can be simultaneously transmitted to the corresponding fifth transparent electrode layer 35 . . In addition, the voltage control circuit 4 of the present embodiment is electrically connected to the transparent conductive layer 12, the second transparent electrode layer 22, and the fourth transparent electrode layer 32, respectively. Here, the first voltage V1 transmitted by the voltage control circuit 4 to the transparent conductive layer 12 may be a writing voltage or a wiping voltage, and the voltage control circuit 4 transmits the second voltage to the second transparent electrode layer 22 and the fourth transparent electrode layer 32. V2 and the third voltage V3 may be a common voltage (for example, 0 volt), a writing voltage, or a wiping voltage, depending on writing or wiping. In addition, the material of the first transparent substrate 11 , the second transparent substrate 13 , the third transparent substrate 34 , the first substrate 21 , or the second substrate 31 may be plastic or glass material or plastic or The material of the transparent conductive layer 12, the first transparent electrode layer 14, the second transparent electrode layer 22, the third transparent electrode layer 24, the fourth transparent electrode layer 32, or the fifth transparent electrode layer 35 may be a transparent conductive material. Or graphene, no limitation.

As shown in FIG. 5B, in the micro-switch electronic tablet E of the present embodiment, when the micro-switch unit 10 is pressed to turn on the micro-switch unit 10, the voltage control circuit 4 can apply the first voltage V1 via the micro-switch unit 10. Up to the first cholesteric liquid crystal module 2 and/or the second cholesteric liquid crystal module 3, the writing trajectory T or the wiping writing trajectory T is displayed accordingly. Specifically, it is assumed that the user writes on the micro-switch electronic tablet E, and the writing track T is to be red when the first cholesteric liquid crystal module 2 corresponds, and when the stylus pen P is pressed on the light incident surface 111, When the micro-switch unit 10 corresponding to the pressing is turned on, the first voltage V1 can be transmitted to the first transparent electrode layer 14 of the second surface 132 of the second transparent substrate 13 via the transparent conductive layer 12 of the micro-switch unit 10, Thereby, the cholesteric liquid crystal molecules corresponding to the first cholesteric liquid crystal module 2 are controlled to be in a planar state, so that the writing trajectory shows a corresponding red color. At this time, the first voltage V1 is also transmitted to the fifth transparent electrode layer 35 via the first transparent electrode layer 14. In order not to display the green corresponding to the second cholesteric liquid crystal module 3, the voltage control circuit 4 does not transmit the common Voltage, but transmitting the same third voltage V3 to the fourth transparent electrode layer 32 as the first voltage V1, so that the voltage difference between the fifth transparent electrode layer 35 and the fourth transparent electrode layer 32 corresponding to the pressing is 0, thereby The conduction of the micro-switch unit 10 does not affect the liquid crystal control region 331 of the second cholesteric liquid crystal layer 33 of the corresponding second cholesteric liquid crystal module 3, and therefore, the writing trajectory T does not display the corresponding corresponding to the second cholesteric liquid crystal module 3. green.

Conversely, if the user selects green, although the first voltage V1 can be via the micro switch The unit 10 is transferred to the first transparent electrode layer 14, but since the voltage control circuit 4 does not transmit the common voltage, the same second voltage V2 as the first voltage V1 is transmitted to the second transparent electrode layer 22, so that the first transparent When the voltage difference between the electrode layer 14 and the second transparent electrode layer 22 is 0, the writing track T does not present the red color corresponding to the first cholesteric liquid crystal module 2; however, the first voltage V1 passes through the first transparent electrode layer 14 And transmitting to the fifth transparent electrode layer 35 such that the fifth transparent electrode layer 35 and the fourth transparent electrode layer 32 (the third voltage V3 is a common voltage) have a voltage difference and the second cholesteric liquid crystal layer 33 corresponds to the cholesteric liquid crystal The molecular transition state to the planar state, whereby the writing track T shows the green color corresponding to the second cholesteric liquid crystal module 3. In addition, if the cholesteric liquid crystal molecules of the first cholesteric liquid crystal module 2 and the second cholesteric liquid crystal module 3 are in a planar state at the same time, the writing trajectory T will display a mixed color of blue and green (blue), thereby making the micro switch The electronic tablet E can display a colorful writing track T. Similarly, in the wiping mode, the user can also select to wipe the writing track of a certain color according to the above control principle, or select the writing track of the mixed color of the two colors to be wiped off. For the specific control method, refer to the above description. .

In addition, in some embodiments, a third cholesteric liquid crystal module (not shown) may be further stacked on the side of the second cholesteric liquid crystal module 3 of the embodiment away from the first cholesteric liquid crystal module 2, and The colors corresponding to the third cholesteric liquid crystal module, the first cholesteric liquid crystal module 2, and the second cholesteric liquid crystal module 3 are different from each other, thereby making the color of the writing trajectory T more diverse.

In summary, in the micro-switch electronic tablet of the present invention, a micro-switch array module and a cholesteric liquid crystal module are included. The micro-switching array module has a plurality of micro-switching units arranged in an array. The transparent conductive layer of each micro-switching unit is disposed on a surface of the first transparent substrate facing away from the light incident surface, and the first transparent electrode layer is disposed on the second transparent substrate. The first surface is extended to the second surface of the second transparent substrate via the conductive hole; wherein the micro-switch array module is overlapped with the cholesteric liquid crystal module by the second transparent substrate, so that The cholesteric liquid crystal layer is interposed between the first substrate and the second transparent substrate. Therefore, since the structure of the micro-switch array module and the cholesteric liquid crystal module is relatively simple and the manufacturing cost is not high; and the micro-switch array module and the cholesteric liquid crystal module are superposed on each other, the detected writing position or The micro-switching electronic writing board that wipes the position function is also quite simple. Therefore, the micro-switch electronic writing board of the present invention has the advantages of simple manufacturing process and low manufacturing cost, and since the voltage of the electrode layers such as the first transparent electrode layer and the second transparent electrode layer is controlled by the voltage control circuit, Invented microswitch The electronic writing board can also simultaneously have the function of detecting the writing position or the wiping position.

The above is intended to be illustrative only and not limiting. Any equivalent modifications or alterations to the spirit and scope of the invention are intended to be included in the scope of the appended claims.

Claims (14)

A micro-switch electronic tablet includes: a micro-switch array module, a plurality of micro-switch units arranged in an array, each of the micro-switch units comprising: a first transparent substrate having a light incident surface; a transparent conductive layer a second transparent substrate having a first surface facing the transparent conductive layer and a second surface opposite to the first surface, wherein the first transparent substrate has a surface facing away from the light incident surface; The second transparent substrate has a conductive hole extending through the first surface and the second surface; a first transparent electrode layer is disposed on the first surface of the second transparent substrate, and is extended through the conductive hole The second surface of the second transparent substrate; and at least one spacer disposed between the first transparent substrate and the second transparent substrate; and a first cholesteric liquid crystal module comprising: a substrate having a second transparent electrode layer disposed on a surface thereof; and a first cholesteric liquid crystal layer disposed on the second transparent electrode layer; wherein the micro-switch array module is formed by the second transparent substrate Liquid crystal with the first cholesterol The groups are superposed on each other such that the first cholesteric liquid crystal layer is interposed between the first substrate and the second transparent substrate; and the other surface of the first substrate of the first cholesteric liquid crystal module is provided with a spacing configuration The third transparent electrode layer. The micro-switch electronic tablet according to claim 1, wherein the third transparent electrode layer is electrically connected to the first transparent electrode layer. The micro-switch electronic tablet according to claim 1, wherein the first transparent substrate, the second transparent substrate, or the first substrate is made of plastic or glass. The micro-switch electronic tablet according to claim 1, wherein the first transparent substrate is a glass substrate, and the thickness of the glass substrate is between 0.1 mm and 0.35 mm. The micro-switch electronic tablet according to claim 1, wherein the transparent conductive layer, the first transparent electrode layer, or the second transparent electrode layer is made of a transparent conductive material or graphene. The micro-switch electronic tablet of claim 1, further comprising: a voltage control circuit electrically connected to the transparent conductive layer and the second transparent electrode layer, respectively. The micro-switch electronic tablet of claim 1, further comprising a second cholesteric liquid crystal module, the second cholesteric liquid crystal module comprising: a second substrate having a fourth transparent electrode layer disposed on a surface thereof And a second cholesteric liquid crystal layer disposed on the fourth transparent electrode layer; wherein the second cholesteric liquid crystal module is overlapped with the first cholesteric liquid crystal module by the first substrate, so that the The second cholesteric liquid crystal layer is interposed between the first substrate and the second substrate. The micro-switch electronic tablet according to claim 7, wherein the material of the second substrate is plastic or glass. The micro-switch electronic tablet according to claim 7, wherein the material of the fourth transparent electrode layer is a transparent conductive material or graphene. A micro-switch electronic tablet includes: a micro-switch array module, a plurality of micro-switch units arranged in an array, each of the micro-switch units comprising: a first transparent substrate having a light incident surface; a transparent conductive layer a second transparent substrate having a first surface facing the transparent conductive layer and a second surface opposite to the first surface, wherein the first transparent substrate has a surface facing away from the light incident surface; The second transparent substrate has a conductive hole extending through the first surface and the second surface; a first transparent electrode layer is disposed on the first surface of the second transparent substrate, and is extended through the conductive hole The second surface of the second transparent substrate; and at least one spacer disposed between the first transparent substrate and the second transparent substrate; a first cholesteric liquid crystal module comprising: a first a substrate having a second transparent electrode layer disposed on a surface thereof; and a first cholesteric liquid crystal layer disposed on the second transparent electrode layer; wherein the micro-switch array module is coupled to the second transparent substrate The first cholesterol liquid crystal module The first cholesteric liquid crystal layer is interposed between the first substrate and the second transparent substrate; and a second cholesteric liquid crystal module comprises: a second substrate, a surface of which is provided with a first surface Four transparent electrode layers; a second cholesteric liquid crystal layer is disposed on the fourth transparent electrode layer; and a third transparent substrate is disposed on the second cholesteric liquid crystal layer, and a surface layer of the second cholesteric liquid crystal layer is disposed The fifth transparent electrode layer is disposed at intervals, wherein the second cholesteric liquid crystal module overlaps the first cholesteric liquid crystal module by the first substrate and the third transparent substrate. The micro-switch electronic tablet of claim 10, wherein the fifth transparent electrode layer is electrically connected to the first transparent electrode layer. The micro-switch electronic tablet according to claim 10, wherein the material of the second substrate or the third transparent substrate is plastic or glass. The micro-switch electronic tablet according to claim 10, wherein the material of the fourth transparent electrode layer or the fifth transparent electrode layer is a transparent conductive material or graphene. The micro-switch electronic tablet according to claim 7 or 10, further comprising: a voltage control circuit respectively electrically connected to the transparent conductive layer, the second transparent electrode layer and the fourth transparent electrode layer connection.