TW202004286A - Micro-switch electronic writing board - Google Patents

Abstract

The invention discloses a micro-switch array module. The micro-switch array module has a plurality of micro-switch units. Each micro-switch unit comprises a first transparent substrate, a transparent conductive layer, a second transparent substrate, a first transparent electrode layer and at least one spacer. The first transparent substrate has a light-entering surface. The transparent conductive layer is disposed on the surface of the first transparent substrate opposing to the light-entering surface. The second transparent substrate has a first surface which faces toward the transparent conductive layer and a second surface opposing to the first surface. The second transparent substrate has a first conductive via which perforates the first surface and the second surface. The first transparent electrode layer is disposed on the first surface of the second transparent substrate and enters into the first conductive via. The spacer is disposed between the first transparent substrate and the second substrate.

Description

Micro switch array module

The invention relates to a micro-switch, in particular to an array-arranged micro-switch module.

Cholesteric liquid crystal (Cholesteric liquid crystal) is to add a chiral dopant to the nematic liquid crystal to make it have a helical arrangement structure, and use two different liquid crystal molecular arrangements that reflect and penetrate under different voltage differences State to achieve different light penetration rates to achieve the display effect. Among them, in the planar state, the incident light is reflected and develops color; in the focal cone state, the incident light penetrates most and a small part is scattered; and in the vertical state, the incident light penetrates completely.

Since the cholesterol liquid crystal is in a flat state and a focal conic state, it belongs to a stable state, so when the voltage is turned off and disappears, it will still maintain the original 來 state and display screen, and only need to be applied when changing to another 狀 state and display screen. Voltage, which has the characteristics of low power consumption and memory, also makes cholesterol liquid crystal the first choice for e-books and writing boards.

At present, most of the cholesterol liquid crystal writing board is pressed by physical force to make the transition. However, when detecting the writing position or performing partial wiping of the cholesterol liquid crystal writing board, it is necessary to additionally configure a corresponding position sensing element on the array substrate of its liquid crystal module. However, because the position sensing element is to be arranged on the array substrate, it requires a lot of semiconductor photomask manufacturing processes. That is to say, in the cholesterol liquid crystal writing board with position detection function, the structure of the element responsible for position sensing is relatively complicated, so the manufacturing cost is relatively increased. In addition, the additional semiconductor process steps may lead to a decrease in yield.

As mentioned above, how to provide a semiconductor process-free and reduce the manufacturing cost of cholesterol liquid crystal writing board is an important issue, and to achieve semiconductor-free process, you must provide another way to sense the user's writing position, And a device that effectively provides voltage to make cholesterol liquid crystals transition.

The object of the present invention is to provide a microswitch array module, which has a relatively simple structure and low manufacturing cost, and can also be applied to a cholesterol liquid crystal writing board, so that it can detect the writing position or the wiping position without a semiconductor manufacturing process.

The invention provides a micro-switch array module. The micro switch array module has a plurality of micro switch units arranged in an array. Each micro-switch unit includes 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-transmitting substrate has a light incident surface. The transparent conductive layer is disposed on the surface of the first light-transmitting 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 has conductive holes penetrating the first surface and the second surface. The first transparent electrode layer is disposed on the first surface of the second light-transmitting substrate and is disposed in the first conductive hole. The spacer is disposed between the first transparent substrate and the second transparent substrate.

In one embodiment, the first transparent electrode layer is extended to the second surface of the second light-transmissive substrate through the conductive hole.

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

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

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

In one embodiment, the material of the transparent conductive layer is transparent conductive material or graphene.

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

As mentioned above, in the microswitch array module of the present invention, it has a plurality of microswitch units arranged in an array. The transparent conductive layer of each micro-switch unit is disposed on the surface of the first light-transmitting substrate facing away from the light incident surface, and the first transparent electrode layer is disposed on the first surface of the second light-transmitting substrate and extends into the first conductive hole. The structure of the micro-switch array module is quite simple, and the manufacturing cost is not high; and the micro-switch array module and the cholesterol liquid crystal module can be superimposed on each other to form a micro-switch electronic with the function of detecting the writing position or wiping the position Writing board, the process is also quite simple. Therefore, the microswitch array module of the present invention has the effects of simple manufacturing process and low manufacturing cost.

The microswitch array module according to various embodiments provided by the present invention will be described below with reference to related drawings. Among them, the same elements will be explained with the same reference symbols.

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

First embodiment

FIG. 1 is a three-dimensional schematic diagram of a microswitch array module according to an embodiment of the invention. FIG. 2A is a schematic structural view of the microswitch array module shown in FIG. 1 along the A-A cutting plane line.

As shown in FIGS. 1 and 2A, the microswitch array module 1 has a plurality of microswitch units 10 arranged in an array. The micro switch unit 10 of this embodiment is exemplified by being arranged in a two-dimensional array. Each micro-switch unit 10 includes a first light-transmitting substrate 11, a second light-transmitting substrate 13, a transparent conductive layer 12, a first transparent electrode layer 14 and at least one spacer 15.

The first transparent substrate 11 has a light incident surface 111. The light incident surface 111 of this embodiment is the upper surface of the first light-transmitting substrate 11 and is also the surface of the microswitch array module 1 facing the user, which may also be referred to as a writing surface or a display surface. After the micro-switch electronic writing board E composed of the cholesterol liquid crystal module (see FIG. 2B and subsequent paragraphs for details), in some embodiments, a protective film layer or protection may be further provided on the light incident surface 111 The base material is used to protect the micro switch array module 1 and the micro switch electronic writing board E.

In each micro-switch unit 10, the transparent conductive layer 12 is provided on the surface 112 of the first light-transmitting substrate 11 facing away from the light incident surface 111. As shown in FIG. 2A, the transparent conductive layer 12 is disposed on the lower surface of the first light-transmitting substrate 11 facing the second light-transmitting substrate 13. The second light-transmitting 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 light-transmitting substrate 13 has a first surface penetrating the first surface 131 and the second surface 132 One conductive hole 133. As the name suggests, the purpose of the first conductive hole 133 is for electrical conduction. In some embodiments, a laser can be used to make holes in the second light-transmissive substrate 13 to obtain first conductive holes 133 penetrating 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 into the first conductive hole 133. Here, in each micro-switch unit 10, the transparent conductive layer 12, the first conductive hole 133 and the first transparent electrode layer 14 have a one-to-one correspondence.

In addition, at least one spacer 15 is disposed between the first transparent substrate 11 and the second transparent substrate 13 so that there is a gap between the first transparent substrate 11 and the second transparent substrate 13, thereby making the transparent conductive layer 12 There is a gap with the first transparent electrode layer 14 on the first surface 131 of the second light-transmitting substrate 13. Specifically, the spacer 15 of the present embodiment surrounds the periphery and/or inside of the micro-switch unit 10 so that there is a gap between the transparent conductive layer 12 and the first transparent electrode layer 14 to form the micro-switch unit 10. In different embodiments, the spacer 15 may also be disposed inside the transparent conductive layer 12 and the first transparent electrode layer 14.

Please refer to FIG. 2B again, which is a schematic structural diagram of a micro-switch electronic writing board composed of the micro-switch array module and the cholesterol liquid crystal module shown in FIG. 2A. It should be noted that the micro-switch electronic writing board E mentioned in this embodiment may be, for example but not limited to, a mobile phone, a tablet, or an electronic whiteboard, or other display devices that can display images. When the microswitch electronic writing board E is an electronic whiteboard or an electronic blackboard, it can be used as a large-sized electronic blackboard (or whiteboard) used in interactive writing systems such as conferences or teaching, but the present invention is not limited thereto. The micro-switching electronic writing board mentioned in this embodiment utilizes the characteristics of cholesterol liquid crystal, so it is a bistable display device. When the micro-switching electronic writing board displays images or screens, 不 requires additional power supply This image or screen will always be preserved. Only when it is changed to another state or display screen, additional power needs to be input. Therefore, the micro-switch electronic writing board is a very power-saving electronic device. That is to say, when an image or screen is displayed on the micro-switch electronic writing board, 不 need to input additional power, this image or screen will always be protected 留, only when changing to another 狀 state or display screen, additional power is required, so its It has the characteristics of low cost and power saving.

As shown in FIG. 2B, the micro-switch array module 1 shown in FIG. 2A and a first cholesterol liquid crystal module 2 form a micro-switch electronic writing board E. The first cholesterol liquid crystal module 2 includes a first cholesterol liquid crystal layer 23, a second transparent electrode layer 22, a first substrate 21, a third transparent electrode layer 25 and a third transparent substrate 24. The second transparent electrode layer 22 is provided on the surface 211 of the first substrate 21 facing the first cholesteric liquid crystal layer 23. Here, the second transparent electrode layer 22 can be comprehensively disposed on the surface of the first substrate 21 facing the first cholesterol liquid crystal layer 23, and the first cholesterol liquid crystal layer 23 is disposed on the second transparent electrode layer 22 and is disposed on Between the third transparent substrate 24 and the second transparent electrode layer 22. The material of the third transparent substrate 24 may be plastic or glass, and has a plurality of second conductive holes 241 penetrating through the third transparent substrate 24. In addition, the aforementioned “comprehensiveness” means that the second transparent electrode layer 22 includes a common electrode on the entire surface, and this common electrode covers most of the surface of the first substrate 21 facing the first cholesterol liquid crystal layer 23. In different embodiments, the second transparent electrode layer 22 may also be arranged on the surface of the first substrate 21 facing the first cholesteric liquid crystal layer 23 at intervals, which is not limited in the present invention. At this time, the user can directly write (press) on the light incident surface (writing surface) 111 of the microswitch array module 1 to generate a writing trajectory. Alternatively, another film layer may be provided on the light incident surface 111, and the user may write (press) on this film layer to generate a writing track.

In addition, the material of the third transparent electrode layer 25 may be a transparent conductive material or graphene, and is disposed on the surface of the third transparent substrate 24 facing the first cholesteric liquid crystal layer 23 and extends into the second conductive hole 241, The second conductive hole 241 is corresponding to the first conductive hole 133. In this way, when the micro-switch array module 1 and the first cholesterol liquid crystal module 2 are superimposed on each other through the second transparent substrate 13 and the third transparent substrate 24, and electrically connected, the third transparent electrode layer 25 can The second conductive hole 241 and the corresponding first conductive hole 133 are electrically connected to the corresponding first transparent electrode layer 14. In some embodiments, the first conductive hole 133 can be electrically connected to the corresponding second conductive hole 241 through an electrical connection pad (not shown), so that the microswitch array module 1 and the first cholesterol liquid crystal can also be connected After the modules 2 are overlapped with each other, the microswitch array module 1 is used to control the display of the first cholesterol liquid crystal module 2. In some embodiments, the micro-switch array module 1 and the first cholesteric liquid crystal module 2 can be further adhered with an adhesive material to enhance the stability of the structure.

In FIG. 2B, the third transparent substrate 24 is disposed opposite to the first substrate 21, and the first cholesterol liquid crystal layer 23 has a plurality of cholesterol liquid crystal molecules (not shown), which can be filled and disposed on the third transparent substrate 24 and the first substrate 21. In addition, the microswitch electronic writing board E may further include a sealing layer (not shown). The sealing layer may be a sealant and is disposed between the third light-transmitting substrate 24 and the first substrate 21 to seal the third light-transmitting The outer periphery of the substrate 24 and the first substrate 21 has a gap between the third light-transmitting substrate 24 and the first substrate 21. That is, an accommodation space can be formed by the third light-transmitting substrate 24, the first substrate 21, and the sealing layer, so that cholesterol liquid crystal molecules can be filled in the accommodation space to form the first cholesterol liquid crystal layer 23. The first cholesterol liquid crystal layer 23 of this embodiment includes a plurality of liquid crystal control regions 231, and each liquid crystal control region 231 is provided corresponding to each micro switch unit 10, respectively. In other words, the range of each liquid crystal control area 231 is defined by each micro switch unit 10, and the cholesterol liquid crystal molecules of the corresponding liquid crystal control area 231 can be controlled by the micro switch unit 10. When a 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 formed to generate an electric field, the cholesterol liquid crystal molecules of the corresponding liquid crystal control area 231 can be controlled to rotate. The materials of the transparent conductive layer 12, the first transparent electrode layer 14 and/or the second transparent electrode layer 22 of this embodiment may be transparent conductive materials (such as ITO or IZO) or graphene, and the invention is not limited thereto.

In this embodiment, the first light-transmitting substrate 11 may be a soft light-transmitting substrate, and the first light-transmitting substrate 11, the second light-transmitting substrate 13 and the first substrate 21 may be light-transmitting substrates, and their materials may be respectively For plastic or glass. When the first light-transmitting substrate 11 is a glass substrate, its thickness may be between 0.1 mm and 0.35 mm (0.1 mm≦d≦0.35 mm), so that the first light-transmitting substrate 11 has a bendable characteristic. Specifically, generally thicker glass substrates (such as 0.5 mm to 1.5 mm) have higher hardness and are difficult to be bent or deformed by pressing, but the thickness of the first light-transmitting substrate 11 is only between 0.1 mm and 0.35 mm If the glass is used, it can exhibit flexible characteristics and can be pressed and written. In some embodiments, the first light-transmissive substrate 11 may be polished and reduced to a thickness between 0.1 mm and 0.35 mm using, for example, but not limited to, a chemical mechanical planarization (CMP) process. In some embodiments, if the second light-transmitting substrate 13, the third light-transmitting substrate 24, and the first substrate 21 are also flexible, the micro-switch electronic writing board E can be made into a curved writing board or display.

In this embodiment, the first substrate 21 may be a transparent substrate or an opaque substrate. When the first substrate 21 is an opaque substrate, it will absorb or reflect the light entering the surface 111 to pass through the micro-switch array module 1, the third transparent substrate 24, the third transparent electrode layer 25, the first cholesterol The light incident on the liquid crystal layer 23 and the second transparent electrode layer 22. When the first substrate 21 can be a light-transmitting substrate, a back plate can be provided on the light exit surface 212 of the first substrate 21, which can be a black light absorption plate or include a light absorption layer, or a white light reflection plate Or include a light reflective layer. In this way, the microswitch electronic writing board E becomes a blackboard or a whiteboard.

The first cholesterol liquid crystal module 2 can correspondingly display a color. Specifically, the microswitch electronic writing board E can be formulated with red (R), green (G), or the like by adding different amounts of optically active agents to the first cholesterol liquid crystal layer 23 of the first cholesterol liquid crystal module 2 Blue (B) and other colors. Here, the corresponding display color of the first cholesterol liquid crystal module 2 may be selected from, for example, but not limited to one of red, green, and blue, or other visible light colors. Cholesterol liquid crystal is achieved by adding an optically active agent to the nematic liquid crystal to achieve a special arrangement structure, and using cholesterol liquid crystal molecules can exhibit at least a focal conic state (Focal conic state) under different voltage differences, physical pressures and/or temperatures , Plane state (planar state) and vertical state (homeotropic state) and several different steady states or transient states to achieve the display or clear effect. Therefore, by changing the axial direction of the spiral structure of the cholesterol liquid crystal, part of the reflected light and/or part of the light can pass through the cholesterol liquid crystal. That is, the display, writing, and even wiping functions of the microswitch electronic writing board E can be achieved by the different light reflectance or transmittance of the cholesterol liquid crystal molecules in different states.

To achieve display control, a voltage control circuit 4 may be further provided in the micro-switch electronic writing board E, which is electrically connected to the micro-switch array module 1 and the first cholesterol liquid crystal module 2 respectively. In detail, 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 cholesterol liquid crystal module 2 respectively. When the micro-switch unit 10 is pressed by the stylus P (or the user's finger) to make the transparent conductive layer 12 contact the first transparent electrode layer 14 and thereby make the micro-switch unit 10 conductive, the voltage control circuit 4 controls the micro-switch unit The first voltage V1 transmitted by the transparent conductive layer 12 of 10 can be transmitted to the first transparent electrode layer 14 to change the cholesterol liquid crystal molecules of the corresponding first cholesterol liquid crystal layer 23, thereby displaying the writing track or wiping Write track. The following is a brief description of the display writing trajectory (writing mode) and wiping the writing trajectory (wiping mode) of the microswitch electronic writing board E, respectively. The switching between the writing mode and the wiping mode (and/or full-clear mode) can be performed by the user by pressing a switching button (not shown) on the micro-switch electronic writing board E.

For example, if the user wants to write on the microswitch electronic writing board E to generate a writing track, he can select the writing mode.

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 cholesterol liquid crystal molecules of the first cholesterol liquid crystal layer 23 are arranged in a focal conic state. At this time, most of the incident light can pass through the first light-transmitting substrate 11 and the second light-transmitting substrate 13 and penetrate the first cholesteric liquid crystal layer 23. A small part of the incident light will be scattered, so the user will see the micro-switch electronics The background color of the writing board E, for example, black.

When the user writes on the microswitch electronic writing board E with a finger, a stylus P or other hard objects, the corresponding microswitch unit 10 is pressed to make the transparent conductive layer 12 contact the first transparent electrode layer 14 to conduct. The voltage control circuit 4 can sequentially transmit the first voltage V1 to the first conductive hole 241 through the transparent conductive layer 12, the first transparent electrode layer 14, the first conductive hole 133, and the second conductive hole 241 electrically connected to the first conductive hole 133 The third transparent electrode layer 25 on the lower surface 242 of the three translucent substrates 24. The voltage control circuit 4 may also transmit the second voltage V2 (for example, a common voltage, such as but not limited to 0 volts) to the second transparent electrode layer 22. At this time, the first voltage V1 minus the second voltage V2 is equal to the writing voltage. The electric field generated by the voltage difference (V1-V2) between the third transparent electrode layer 25 and the second transparent electrode layer 22 will force the corresponding cholesterol liquid crystal molecules of the first cholesterol liquid crystal layer 23 to transition from the focal cone state to the planar state. At this time, the incident light at the pressed portion is Bragg reflected, and the reflected light (having a specific wavelength) is emitted from the light incident surface 111. At the same time, the microswitch electronic writing board E will display the color of the reflected light at the pressed position, and accordingly display the writing track. The writing track will show the color corresponding to the first cholesterol liquid crystal module 2 (such as the aforementioned red or green). That is, if the user writes text or draws a pattern on the microswitch electronic writing board E, the microswitch electronic writing board E will display a writing track with a corresponding color.

On the other hand, if the user wants to wipe the existing writing track on the microswitch electronic writing board E, he can select the wiping mode (which can be wiped partially or completely). Here, the first voltage V1 supplied by 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 to be wiped with a writing pen P or other wiping tool, the micro-switch unit 10 corresponding to the wiping place will press the transparent conductive layer 12 of the micro-switch unit 10 The first transparent electrode layer 14 contacts and conducts. At this time, the voltage control circuit 4 similarly sequentially transmits the first voltage V1 transmitted by the transparent conductive layer 12 through the transparent conductive layer 12, the first transparent electrode layer 14, the first conductive hole 133, and the first conductive hole 133 The second conductive hole 241 is transmitted to the third transparent electrode layer 25 on the lower surface 242 of the third light-transmitting substrate 24. At this time, the electric field generated by the pressure difference (V1-V2) between the third transparent electrode layer 25 and the second transparent electrode layer 22 will force the corresponding cholesterol liquid crystal molecules to transition from the planar state to the focal conic state. At this time, most of the incident light can pass through the first light-transmitting substrate 11, the second light-transmitting substrate 13, and the third light-transmitting substrate 24 and penetrate the first cholesterol liquid crystal layer 23 at the wiping place, so the user is at the wiping place You will see the background color of the microswitch electronic writing board E, thereby clearing the writing track at the wipe.

As mentioned above, since the structure of the microswitch array module 1 is quite simple, the manufacturing cost is relatively low. Moreover, if it is to be made into a microswitch electronic writing board E, the microswitch array module 1 and the first cholesterol liquid crystal module 2 of this embodiment only need to overlap each other without precise positioning, and it can control the first For the display of the cholesterol liquid crystal module 2, the manufacturing process is also quite simple. Therefore, the micro-switch array module 1 of this embodiment has a relatively simple structure, relatively low manufacturing cost, and is convenient to be manufactured on other electronic display devices such as electronic writing boards.

Second embodiment

In addition, please refer to FIG. 3A and FIG. 3B, which are schematic structural diagrams of a micro-switch array module according to another embodiment of the present invention, and are composed of the micro-switch array module and the cholesterol liquid crystal module shown in FIG. 3A. Schematic diagram of the microswitch electronic writing board.

The micro-switch array module 1 of this embodiment is substantially the same as the micro-switch array module described in the previous embodiment. The main difference is that, as shown in FIG. 3A, in the micro-switch array module 1 of this embodiment, the first transparent electrode layer 14 is disposed on the first surface 131 of the second light-transmitting substrate 13 and passes through the A conductive hole 133 is extended to the second surface 132 of the second light-transmissive substrate 13 to form corresponding and spaced-apart first transparent electrode layers 14 on the second surface 132. Therefore, when the transparent conductive layer 12 is pressed down against 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 pass through the transparent conductive layer of the micro-switch unit 10 12 is transferred to the first transparent electrode layer 14 and is transferred to the first transparent electrode layer 14 on the second surface 132 of the second light-transmitting substrate 13 through the first conductive hole 133.

In addition, the composition of the other elements of the microswitch array module 1 of this embodiment, the connection relationship of the other elements, and the changes are the same as those in the previous embodiment, and will not be repeated here.

Please refer to FIG. 3B again, which is a schematic structural diagram of a microswitch electronic writing board composed of the microswitch array module and the cholesterol liquid crystal module shown in FIG. 3A. As shown in FIG. 3B, the micro-switch array module 1 and a first cholesterol liquid crystal module 2 form a micro-switch electronic writing board E. The composition and operation of the micro-switch electronic writing board E and the first cholesterol liquid crystal module 2 mentioned in this embodiment are substantially the same as those in the previous embodiment. The difference is that, as shown in FIG. 3B, the first cholesterol liquid crystal module 2 includes only the first cholesterol liquid crystal layer 23, the second transparent electrode layer 22 and the first substrate 21. In addition, the second transparent substrate 13 is disposed opposite to the first substrate 21, and the first cholesteric liquid crystal layer 23 is filled and disposed between the second transparent substrate 13 and the first substrate 21.

Similarly, when the micro-switch unit 10 is pressed by the stylus P (or the user's finger) to make the transparent conductive layer 12 contact the first transparent electrode layer 14 and thereby make the micro-switch unit 10 conductive, the voltage control circuit 4 pairs The first voltage V1 transmitted by the transparent conductive layer 12 of the micro-switching unit 10 can be transmitted to the first transparent electrode layer 14 so as to transform the corresponding cholesterol liquid crystal molecules of the first cholesterol liquid crystal layer 23, according to which Trace or wipe the writing trace.

The following is a brief description of the display writing trajectory (writing mode) and wiping the writing trajectory (wiping mode) of the microswitch electronic writing board E, respectively. The switching between the writing mode and the wiping mode (and/or full-clear mode) can be performed by the user by pressing a switching button (not shown) on the micro-switch electronic writing board E.

In the writing mode, when the user writes on the micro-switch electronic writing board E with a finger, a stylus P, or other hard objects, the corresponding micro-switch unit 10 presses the transparent conductive layer 12 and the first transparent electrode layer 14 contacts and conducts. The voltage control circuit 4 can transmit the first voltage V1 to the first transparent electrode layer 14 of the lower surface 132 of the second transparent substrate 13 through the transparent conductive layer 12, the first transparent electrode layer 14 and the first conductive hole 133 in this order . The voltage control circuit 4 may also transmit the second voltage V2 (for example, a common voltage, such as but not limited to 0 volts) to the second transparent electrode layer 22. At this time, the first voltage V1 minus the second voltage V2 is equal to the writing voltage. 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 cholesterol liquid crystal molecules of the first cholesterol liquid crystal layer 23 to transition from the focal cone state to the planar state. At this time, the incident light at the pressed portion is Bragg reflected, and the reflected light (having a specific wavelength) is emitted from the light incident surface 111. At the same time, the microswitch electronic writing board E will display the color of the reflected light at the pressed position, and accordingly display the writing track. The writing track will show the color corresponding to the first cholesterol liquid crystal module 2 (such as the aforementioned red or green). That is, if the user writes text or draws a pattern on the microswitch electronic writing board E, the microswitch electronic writing board E will display a writing track with a corresponding color.

On the other hand, if the user wants to wipe the existing writing track on the micro-switch electronic writing pad E, the user can select the wiping mode (partial or complete wiping). Here, the first voltage V1 supplied by 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 to be wiped with a writing pen P or other wiping tool, the micro-switch unit 10 corresponding to the wiping place will press the transparent conductive layer 12 of the micro-switch unit 10 The first transparent electrode layer 14 contacts and conducts. At this time, the voltage control circuit 4 similarly transmits the first voltage V1 transmitted by the transparent conductive layer 12 to the second transparent substrate 13 through the transparent conductive layer 12, the first transparent electrode layer 14 and the first conductive hole 133 in this order The first transparent electrode layer 14 of the second surface 132. At this time, the electric field generated by the pressure difference (V1-V2) between the first transparent electrode layer 14 and the second transparent electrode layer 22 will force the corresponding cholesterol liquid crystal molecules to align from the planar state to the focal cone state. 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 at the wiping place, so the user will see the electronic writing of the microswitch at the wiping place The background color of the board E, thereby clearing the writing track at the wipe.

As mentioned above, since the structure of the microswitch array module is quite simple, the manufacturing cost is relatively low. Moreover, if it is to be made into a micro-switch electronic writing board, the micro-switch array module and the first cholesterol liquid crystal module of this embodiment only need to overlap each other without precise positioning, and it can control the first cholesterol liquid crystal module The display of the group and the manufacturing process are also quite simple. Therefore, the micro-switch array module of this embodiment has a relatively simple structure, relatively low manufacturing cost, and is convenient to be manufactured on other electronic display devices such as electronic writing boards.

The above is only exemplary, and not restrictive. Any equivalent modifications or changes made without departing from the spirit and scope of the present invention shall be included in the scope of the attached patent application.

1‧‧‧Microswitch array module 10‧‧‧Microswitch unit 11‧‧‧First light-transmitting substrate 111‧‧‧Light incident surface 112‧‧‧(The first light-transmitting substrate) surface 12‧‧‧Transparent Conductive layer 13‧‧‧Second translucent substrate 131‧‧‧First surface 132‧‧‧Second surface 133‧‧‧First conductive hole 14‧‧‧First transparent electrode layer 15‧‧‧Spacer 2‧ ‧‧First cholesterol liquid crystal module 21‧‧‧First substrate 211‧‧‧(first substrate) surface 212‧‧‧Light exit surface 22‧‧‧Second transparent electrode layer 23‧‧‧First cholesterol liquid crystal Layer 231‧‧‧ Liquid crystal control area 24‧‧‧ Third transparent substrate 241‧‧‧Second conductive hole 242‧‧‧(The third transparent substrate) Lower surface 25‧‧‧ Third transparent electrode layer 4‧ ‧‧Voltage control circuit AA‧‧‧Cutted wire E‧‧‧Microswitch electronic writing board P‧‧‧ Writing pen V1‧‧‧First voltage V2‧‧‧Second voltage

FIG. 1 is a three-dimensional schematic diagram of a microswitch array module according to an embodiment of the invention. FIG. 2A is a schematic structural view of the microswitch array module shown in FIG. 1 along the A-A cutting plane line. 2B is a schematic structural diagram of a micro-switch electronic writing board composed of the micro-switch array module and the cholesterol liquid crystal module shown in FIG. 2A. FIG. 3A is a schematic structural diagram of a microswitch array module according to another embodiment of the invention. 3B is a schematic structural diagram of a microswitch electronic writing board composed of the microswitch array module and the cholesterol liquid crystal module shown in FIG. 3A.

1‧‧‧Micro switch array module

10‧‧‧Micro switch unit

11‧‧‧The first transparent substrate

111‧‧‧Light incident surface

112‧‧‧(the first transparent substrate) surface

12‧‧‧Transparent conductive layer

13‧‧‧Second translucent substrate

131‧‧‧ First surface

132‧‧‧Second surface

133‧‧‧First conductive hole

14‧‧‧First transparent electrode layer

15‧‧‧ spacer

Claims (7)

A micro-switch array module has a plurality of micro-switch units arranged in an array, and each of the micro-switch units includes: a first light-transmitting substrate having a light incident surface; and a transparent conductive layer disposed on the first light-transmitting substrate A surface facing away from the light incident surface; a second transparent substrate having a first surface facing the transparent conductive layer and a second surface opposite to the first surface, the second transparent substrate having a A first conductive hole on a surface and the second surface; a first transparent electrode layer disposed on the first surface of the second transparent substrate and extending into the first conductive hole; and at least a gap The piece is disposed between the first light-transmitting substrate and the second light-transmitting substrate. The micro-switch array module as described in item 1 of the patent application range, wherein the first transparent electrode layer is extended to the second surface of the second light-transmitting substrate through the first conductive hole. The micro-switch array module as described in item 1 or 2 of the patent application range, wherein the material of the first light-transmitting substrate is plastic or glass. The micro-switch array module as described in item 1 or 2 of the patent application range, wherein the material of the second light-transmitting substrate is plastic or glass. The micro-switch array module as described in item 1 or 2 of the patent application range, wherein the first light-transmitting substrate is a glass substrate, and the thickness of the glass substrate is between 0.1 mm and 0.35 mm. The microswitch array module as described in item 1 or 2 of the patent application range, wherein the material of the transparent conductive layer is a transparent conductive material or graphene. The microswitch array module as described in item 1 or 2 of the patent application range, wherein the material of the first transparent electrode layer is a transparent conductive material or graphene.

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