Liquid crystal writing film capable of displaying an auxiliary pattern and method for displaying an auxiliary pattern

Abstract

The application provides a liquid crystal writing film capable of displaying an auxiliary pattern and an auxiliary pattern display method, which comprises a first conductive layer, a liquid crystal layer and a second conductive layer, the first conductive layer is divided into a plurality of mutually insulated conductive areas in a first direction, in at least one conductive area, there is at least one first auxiliary display area with a distance of a set value between two continuous insulation division lines in the first direction; the second conductive layer is divided into a plurality of mutually insulated conductive areas in a second direction, in at least one conductive area, there is at least one second auxiliary display area with a distance of a set value between two continuous insulation division lines in the second direction; the first direction and the second direction are perpendicular, the set value is the line width of the auxiliary pattern, at least one first auxiliary display area and at least one second auxiliary display area are combined to form an auxiliary pattern display area; automatic display of the auxiliary pattern is realized, and the utilization efficiency of teaching time is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of liquid crystal writing film, and particularly relates to a liquid crystal writing film capable of displaying an auxiliary pattern and an auxiliary pattern display method. BACKGROUND

[0002] The statements in this section merely provide background technology related to the present application and do not necessarily constitute prior art.

[0003] The liquid crystal writing film described in the present patent has obvious differences from ordinary liquid crystal display films and plasma display films in terms of liquid crystal components, working principles, application ranges, use modes and the like, especially in terms of writing. Ordinary liquid crystal display films and plasma display films cannot achieve indentation writing and erasing of traces.

[0004] Currently, liquid crystal writing devices on the market mainly include a first conductive layer, a bistable liquid crystal layer and a second conductive layer. The first conductive layer and the second conductive layer both adopt a conductive film structure, such as a PET film. The working principle is to use the bistable characteristics of liquid crystals to display and / or erase the written content on the liquid crystal writing board. For example, taking cholesteric liquid crystals as an example, the writing pressure trajectory of a writing pen is recorded by the pressure acting on the liquid crystal writing board, and then the corresponding written content is displayed. By applying voltages to the upper and lower conductive layers respectively, a set electric field is formed in the bistable liquid crystal layer, so that the cholesteric liquid crystal structure changes, and thus the writing pressure trajectory on the liquid crystal writing board disappears to achieve erasing.

[0005] The prior art discloses a liquid crystal writing device capable of achieving local erasing. The upper and lower conductive layers are respectively divided, the writing plane is divided into a plurality of local erasable regions by dividing the conductive layers, and the voltage difference is formed by the electric field superposition of these regions, so that local erasing can be achieved.

[0006] With the wide application of liquid crystal writing devices in the field of education and teaching, higher requirements are put forward for the functions of the liquid crystal writing devices. For example:

[0007] (1) When students are writing or practicing, they need to refer to certain auxiliary lines, such as grid lines, Chinese pinyin auxiliary lines, and English four-line three-space auxiliary lines; or, when making musical scores, they also need staff auxiliary lines to accurately identify notes. However, most LCD writing tablets on the market do not have any auxiliary line function in the writing area. In specific teaching use, one method is to stick the sticker with auxiliary lines onto the LCD writing tablet. This method easily leads to uneven writing, and the writing is interrupted by the sticker, greatly reducing the writing experience; another method is to draw auxiliary lines manually on the LCD writing tablet. This method will erase the auxiliary lines when erasing the writing, and the auxiliary lines need to be redrawn when using it again, which is time-consuming and laborious, seriously delaying teaching time.

[0008] (2) Existing LCD writing devices do not have a calculator function. Students need to carry an extra calculator when writing, calculating or practicing on the LCD writing board, which is very inconvenient.

[0009] (3) Existing LCD writing devices cannot perform functions such as Sudoku exercises. Students cannot solve exercises independently on the LCD writing board, nor can they know in a timely manner whether the answer is correct. Summary of the Invention

[0010] To address the shortcomings of existing technologies, this invention provides a liquid crystal writing film capable of displaying auxiliary patterns and a method for displaying auxiliary patterns. This enables the automatic display of auxiliary patterns, optimizes the functionality of the liquid crystal writing board, and improves the efficiency of teaching time utilization.

[0011] To achieve the above objectives, the present invention adopts the following technical solution:

[0012] The first aspect of the present invention provides a liquid crystal writing film capable of displaying auxiliary patterns.

[0013] A liquid crystal writing film capable of displaying auxiliary patterns includes a first conductive layer, a liquid crystal layer, and a second conductive layer.

[0014] The first conductive layer is divided into multiple mutually insulated first conductive regions along a first direction. In at least one first conductive region, there is at least one continuous first auxiliary display region. In the first auxiliary display region, the distance between two insulating dividing lines along the first direction is a first preset value.

[0015] The second conductive layer is divided into multiple mutually insulated second conductive regions along the second direction. In at least one second conductive region, there is at least one continuous second auxiliary display region. In the second auxiliary display region, the distance between two insulated dividing lines along the second direction is a second set value.

[0016] The first direction and the second direction are perpendicular, the first set value is a first direction line width of the auxiliary pattern, the second set value is a second direction line width of the auxiliary pattern, and the at least one first auxiliary display area and the at least one second auxiliary display area combine to form an auxiliary pattern display area.

[0017] As an optional implementation, in the first conductive area where the first auxiliary display area exists, the position of the non-first conductive area, the distance between the two insulating division lines along the first direction is a third set value, and the first set value is less than the third set value.

[0018] As an optional implementation, in the second conductive area where the second auxiliary display area exists, the position of the non-second conductive area, the distance between the two insulating division lines along the second direction is a fourth set value, and the second set value is less than the fourth set value.

[0019] As an optional implementation, the auxiliary pattern at least includes four first auxiliary display areas combined to form parallel pinyin lines, and the distances between adjacent pinyin lines are equal.

[0020] As an optional implementation, the auxiliary pattern at least includes three first auxiliary display areas and three second auxiliary display areas combined to form a checkboard, the distances between adjacent first auxiliary display areas are equal, and the distances between adjacent second auxiliary display areas are equal.

[0021] As an optional implementation, the auxiliary pattern at least includes: four first auxiliary display areas combined to form pinyin lines and three first auxiliary display areas and three second auxiliary display areas combined to form a checkboard, and the checkboard is located on the upper side or the lower side of the pinyin lines.

[0022] The second aspect of the present application provides a liquid crystal writing film capable of displaying an auxiliary pattern.

[0023] A liquid crystal writing film capable of displaying an auxiliary pattern, comprising a first conductive layer, a liquid crystal layer and a second conductive layer.

[0024] The first conductive layer is divided into a plurality of mutually insulated first conductive areas along the first direction, and in at least one first conductive area, there is at least one continuous first auxiliary display area, and in the first auxiliary display area, the distance between the two insulating division lines along the first direction is a first set value.

[0025] The at least one first auxiliary display area forms a display area of the auxiliary pattern.

[0026] As an optional implementation, the auxiliary pattern at least includes four first auxiliary display areas combined to form parallel pinyin lines, and the distances between adjacent pinyin lines are equal.

[0027] The third aspect of the present application provides a liquid crystal writing film capable of displaying an auxiliary pattern.

[0028] A liquid crystal writing film capable of displaying an auxiliary pattern, comprising a first conductive layer, a liquid crystal layer and a second conductive layer.

[0029] The first conductive layer or the second conductive layer is divided into a plurality of mutually insulated second conductive regions along the second direction, and at least one of the second conductive regions has at least one continuous second auxiliary display region, and the distance between two insulation division lines along the second direction in the second auxiliary display region is a second set value.

[0030] The at least one second auxiliary display region forms a display region of the auxiliary pattern.

[0031] As an optional implementation, a plurality of auxiliary pattern display regions are arranged on the liquid crystal writing film along the second direction.

[0032] As an optional implementation, the insulation division line is generated on the liquid crystal writing film by water washing etching and laser etching.

[0033] The fourth aspect of the present application provides a display method of an auxiliary pattern.

[0034] A display method of an auxiliary pattern, using the liquid crystal writing film capable of displaying an auxiliary pattern of the first aspect or the second aspect or the third aspect, comprising the following processes:

[0035] An auxiliary pattern display region is driven by electricity to display a to-be-displayed auxiliary pattern.

[0036] When erasing a writing trace, the auxiliary pattern in the area where the eraser is located is completely erased, and after a set time or after receiving a re-display instruction, the erased auxiliary pattern is re-displayed.

[0037] As an optional implementation, when the to-be-displayed auxiliary pattern is a pinyin line and a field pattern, the control is to display only the pinyin line in the auxiliary pattern or only the field pattern in the auxiliary pattern.

[0038] As an optional implementation, the control is realized by two buttons, one button is pressed to re-display the erased auxiliary pattern, and the other button is pressed to stop displaying the auxiliary pattern.

[0039] As an optional implementation, the control is realized by one button, when the button is pressed for a first continuous time, the auxiliary pattern is not displayed, and when the button is pressed for more than a second continuous time, the auxiliary pattern is displayed.

[0040] The fifth aspect of the present application provides a liquid crystal writing film capable of displaying an auxiliary pattern, comprising a first conductive layer, a bistable liquid crystal layer and a second conductive layer arranged in sequence, the first conductive layer is divided into two or more mutually insulated first conductive regions; the second conductive layer is divided into two or more mutually insulated second conductive regions; the first conductive regions are distributed along a first direction, and the second conductive regions are distributed along a second direction, the first direction and the second direction are perpendicular to each other in space;

[0041] There is at least one first region, the first conductive regions in the first region include first width w1 conductive regions and second width w2 conductive regions; there is at least one second width w2 conductive region between two adjacent first width w1 conductive regions; the second conductive regions in the first region include third width w3 conductive regions and fourth width w4 conductive regions; there is at least one fourth width w4 conductive region between two adjacent third width w3 conductive regions; wherein w1, w2, w3 and w4 are set values;

[0042] The first width w1 conductive regions and / or the third width w3 conductive regions are controlled to be in a display state to display an auxiliary pattern in the first region.

[0043] The sixth aspect of the present application provides a liquid crystal writing film capable of displaying an auxiliary pattern, comprising a first conductive layer, a bistable liquid crystal layer and a second conductive layer arranged in sequence, the first conductive layer is divided into two or more mutually insulated first conductive regions; the second conductive layer is divided into two or more mutually insulated second conductive regions; the first conductive regions are distributed along a first direction, and the second conductive regions are distributed along a second direction, the first direction and the second direction are perpendicular to each other in space;

[0044] Further comprising: at least one second region, a control unit, a positioning unit and a number, symbol and / or letter display region arranged at a set position on the writing film;

[0045] The positioning unit can position the region where the selected number or letter is located and send it to the control unit, and the control unit can display the number, symbol or letter corresponding to the positioning position in the second region based on the positioning position.

[0046] The seventh aspect of the present application provides a liquid crystal writing board comprising the above-mentioned liquid crystal writing film capable of displaying an auxiliary pattern.

[0047] Compared with the prior art, the present application has the following beneficial effects:

[0048] 1. The liquid crystal writing film capable of displaying an auxiliary pattern and the auxiliary pattern display method can realize automatic display of the auxiliary pattern, avoid the cumbersome process of pasting auxiliary line patterns and temporarily drawing auxiliary line patterns, and improve the utilization efficiency of teaching time.

[0049] 2. The liquid crystal writing film capable of displaying an auxiliary pattern and the auxiliary pattern display method can realize automatic display of the auxiliary pattern, avoid the cumbersome process of pasting auxiliary line patterns and temporarily drawing auxiliary line patterns, and improve the utilization efficiency of teaching time.

[0050] 3. The liquid crystal writing film capable of displaying an auxiliary pattern and the auxiliary pattern display method can realize automatic display of a plurality of patterns, such as pinyin lines, staff lines, and checkboard patterns, and has a wide range of applications.

[0051] 4. The liquid crystal writing film capable of displaying an auxiliary pattern and the auxiliary pattern display method can meet the writing needs of teachers and students of different heights, and has strong applicability.

[0052] 5. The insulating partitioning mode of the conductive layer can realize free display and switching of auxiliary patterns such as checkboard patterns and pinyin lines, and users can select as needed. Meanwhile, the liquid crystal writing board with the local erasing function is additionally provided with functions such as calculators, answerers, Sudoku exercises, and mathematical exercises, so as to optimize the functions of the writing board, increase the use rate of the writing board, and improve the quality and efficiency of education and teaching.

[0053] 6. The insulating partitioning mode is optimized when the calculator function is realized, so as to solve the problem that the decimal point display is too small to be easily seen. BRIEF DESCRIPTION OF DRAWINGS

[0054] The drawings constituting a part of the specification of the present application are used to provide a further understanding of the present application, and the illustrative embodiments of the present application and the description thereof are used to explain the present application, and do not constitute an improper limitation on the present application.

[0055] Figure 1 The first auxiliary display area schematic diagram provided for the embodiment 1 of the present application.

[0056] Figure 2 The second auxiliary display area schematic diagram provided for the embodiment 1 of the present application.

[0057] Figure 3 The auxiliary pattern schematic diagram provided for the embodiment 1 of the present application.

[0058] Figure 4A second auxiliary display area provided for the embodiment 1 of the present application.

[0059] Figure 5 A specific auxiliary pattern to be displayed provided for the embodiment 1 of the present application.

[0060] Figure 6 A plurality of positions where the auxiliary pattern to be displayed can be provided on the liquid crystal writing film provided for the embodiment 1 of the present application.

[0061] Figure 7 At least one normal second conductive area 9 is further provided between the second conductive area 13 and the second conductive area 14 provided for the embodiment 1 of the present application.

[0062] Figure 8 A first conductive layer provided for the embodiment 4 of the present application.

[0063] Figure 9 A second conductive layer provided for the embodiment 4 of the present application.

[0064] Figure 10 A first conductive area in the first area provided for the embodiment 6 of the present application.

[0065] Fig. 11(a)-(c) are respectively schematic diagrams of a number, a symbol, and a letter displayed by laser etching provided for the embodiment 6 of the present application.

[0066] Fig. 12(a)-(b) are respectively schematic diagrams of the division of the first conductive area and the second conductive area in the second area provided for the embodiment 6 of the present application.

[0067] Wherein, 1-first conductive area; 2-first conductive area; 3-insulating division line; 4-first auxiliary display area; 5-second conductive area; 6-second conductive area; 7-insulating division line; 8-second auxiliary display area; 9-second conductive area; 10-pinyin line; 11-checkerboard; 12-liquid crystal writing film; 13-second conductive area; 14-second conductive area. DETAILED DESCRIPTION

[0068] The present application will be further described below in conjunction with the accompanying drawings and embodiments.

[0069] It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the present application. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the present application belongs.

[0070] It is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and / or "comprising," when used in this specification, specify the presence of stated features, steps, operations, elements, components, and / or groups thereof, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and / or groups thereof.

[0071] The embodiments in the present application and the features in the embodiments can be combined with each other in the case of no conflict.

[0072] Embodiment 1

[0073] The embodiment 1 of the present application provides a liquid crystal writing film capable of displaying an auxiliary pattern, comprising a first conductive layer, a liquid crystal layer and a second conductive layer.

[0074] The first conductive layer is divided into a plurality of first conductive regions along a first direction and insulated from each other, and in at least one of the first conductive regions, there is at least one continuous first auxiliary display region, and in the first auxiliary display region, the distance between two insulation division lines along the first direction is a first set value d1.

[0075] The second conductive layer is divided into a plurality of second conductive regions along a second direction and insulated from each other, and in at least one of the second conductive regions, there is at least one continuous second auxiliary display region, and in the second auxiliary display region, the distance between two insulation division lines along the second direction is a second set value d2.

[0076] The first direction and the second direction are perpendicular, the first set value is the first direction line width of the auxiliary pattern, the second set value is the second direction line width of the auxiliary pattern, and the at least one first auxiliary display region and the at least one second auxiliary display region combine to form an auxiliary pattern display region.

[0077] In the present embodiment, in the first conductive region where the first auxiliary display region exists, the distance between the two insulation division lines along the first direction at the position other than the first conductive region is a third set value D1, and the first set value d1 is less than the third set value D1.

[0078] In the present embodiment, in the second conductive region where the second auxiliary display region exists, the distance between the two insulation division lines along the second direction at the position other than the second conductive region is a fourth set value D2, and the second set value d2 is less than the fourth set value D2.

[0079] It can be understood that in other embodiments, when the distribution of the division lines is relatively dense, the first set value can be greater than the third set value, and the second set value can be greater than the fourth set value. Those skilled in the art can set the first set value and the second set value according to the size of the liquid crystal writing film and the width of the auxiliary line to be displayed. Here, the first set value and the second set value can also be set artificially according to preferences. Here, the details are not repeated.

[0080] Specifically, as shown in Figure 1 , in the first conductive region 1 in the first conductive layer, there is a first auxiliary display region 4 with a distance of a set value between two insulating division lines 3 continuous at one end. The adjacent conductive region of the first conductive region 1 is the first conductive region 2. The width of the first auxiliary display region 4 is constant and is a set value. That is, the first auxiliary display region 4 is displayed as a horizontal line (i.e. a line in the first direction) of the auxiliary pattern to be displayed.

[0081] It can be understood that in other embodiments, in the first conductive region 1, a plurality of first auxiliary display regions 4 can also be provided, as shown in Figure 2 , which is a case of two first auxiliary display regions 4. Those skilled in the art can set three, four or more segments according to specific working conditions.

[0082] As shown in Figure 3 , in the second conductive region 5 in the second conductive layer, there is a second auxiliary display region 8 with a distance of a set value between two insulating division lines 7 continuous at one end. The adjacent conductive region of the second conductive region 5 is the second conductive region 6. The width of the second auxiliary display region 8 is constant and is a set value. That is, the second auxiliary display region 8 is displayed as a vertical line (i.e. a line in the second direction) of the auxiliary pattern to be displayed.

[0083] It can be understood that in other embodiments, in the second conductive region 5, a plurality of second auxiliary display regions 8 can also be provided, as shown in Figure 4 , which is a case of two second auxiliary display regions 8. Those skilled in the art can set three, four or more segments according to specific working conditions.

[0084] As shown in Figure 5 , for a specific auxiliary pattern to be displayed, the horizontal lines and vertical lines are combined in the above-mentioned manner to realize the display of 4 pinyin lines 10 and four checkers 11. It can be understood that in other embodiments, the number of checkers 11 can be selected according to specific working conditions. Here, the details are not repeated.

[0085] It can be understood that in other embodiments, the auxiliary pattern to be displayed can be provided at multiple positions of the liquid crystal writing film, as shown in Figure 6As shown, the auxiliary display pattern is arranged in the upper part, the middle part and the lower part of the liquid crystal writing film 12 respectively; or only one auxiliary display pattern can be arranged in the middle part of the liquid crystal writing film, and the person skilled in the art can select according to the specific working condition, which will not be described here.

[0086] It can be understood that the functions of the first conductive layer and the second conductive layer in the embodiment can be interchangeable, that is, the first conductive layer displays vertical lines and the second conductive layer displays horizontal lines, and the person skilled in the art can select according to the specific working condition, which will not be described here.

[0087] It can be understood that in other embodiments, the auxiliary display pattern can also be only one horizontal line as a reticle, or only one vertical line as a reticle, and the person skilled in the art can select according to the specific working condition, which will not be described here.

[0088] It can be understood that in other embodiments, as shown in FIG. 1C, the auxiliary display pattern can be a horizontal line and a vertical line. Figure 7 As shown, at least one normal fifth conductive region 9 is arranged between the second conductive region 13 and the second conductive region 14, for realizing the display of thick lines or for realizing the spacing between the vertical lines.

[0089] It can be understood that the insulating partition line can be arranged on the first conductive layer and the second conductive layer by means of water washing etching and laser etching.

[0090] Embodiment 2:

[0091] The embodiment 2 of the present application provides a liquid crystal writing film capable of displaying an auxiliary pattern, comprising a first conductive layer, a liquid crystal layer and a second conductive layer.

[0092] The first conductive layer is divided into a plurality of mutually insulated first conductive regions along a first direction, and in at least one first conductive region, there is at least one continuous first auxiliary display region, and in the first auxiliary display region, the distance between two insulating partition lines along the first direction is a first set value.

[0093] The at least one first auxiliary display region forms a display region of the auxiliary pattern.

[0094] That is, only the auxiliary pattern is arranged on the first conductive layer, and the auxiliary pattern at least includes four first auxiliary display regions combined to form mutually parallel pinyin lines, and the spacing between adjacent pinyin lines is equal.

[0095] Embodiment 3:

[0096] The embodiment 3 of the present application provides a liquid crystal writing film capable of displaying an auxiliary pattern, comprising a first conductive layer, a liquid crystal layer and a second conductive layer.

[0097] The first conductive layer or the second conductive layer is divided into a plurality of mutually insulated second conductive regions along the second direction, and in at least one of the second conductive regions, there is at least one continuous second auxiliary display region, and in the second auxiliary display region, the distance between two insulation division lines along the second direction is a second set value;

[0098] The at least one second auxiliary display region forms a display region of an auxiliary pattern.

[0099] That is, only the auxiliary pattern is arranged on the first conductive layer, and the auxiliary pattern at least includes vertical lines combined by four second auxiliary display regions, the vertical distance between adjacent vertical lines is equal, and the vertical lines are used as a mark line for writing.

[0100] Embodiment 4:

[0101] As shown in FIGS. 4A and 4B, the embodiment 4 of the present application provides a liquid crystal writing film capable of displaying an auxiliary pattern, which includes a first conductive layer, a liquid crystal layer, and a second conductive layer. Figure 8 Figure 9 The first conductive layer is divided into a plurality of mutually insulated first conductive regions along the first direction, and in at least one of the first conductive regions, the distance between two insulation division lines along the first direction is a first set value d3, and this first conductive region is a first auxiliary display region.

[0102] The second conductive layer is divided into a plurality of mutually insulated second conductive regions along the second direction, and in at least one of the second conductive regions, the distance between two insulation division lines along the second direction is a second set value d4, and this second conductive region is a second auxiliary display region.

[0103] The second conductive layer is divided into a plurality of mutually insulated second conductive regions along the second direction, and in at least one of the second conductive regions, the distance between two insulation division lines along the second direction is a second set value d4, and this second conductive region is a second auxiliary display region.

[0104] In this embodiment, the distance between two insulation division lines along the first direction of the first conductive region not used for auxiliary pattern display is D3, and d3D3; and the distance between two insulation division lines along the second direction of the second conductive region not used for auxiliary pattern display is D4, and d4D4.

[0105] It can be understood that in other embodiments, the value of d3 can also be greater than D3, and the value of d4 can also be greater than D4, and those skilled in the art can set them according to the interval between the insulation division lines of each conductive region and the line width preference of the auxiliary line, which will not be described here.

[0106] The first direction and the second direction are perpendicular, the first set value is the first direction line width of the auxiliary pattern, the second set value is the second direction line width of the auxiliary pattern, and the at least one first auxiliary display region and the at least one second auxiliary display region combine to form an auxiliary pattern display region.

[0107] ​It can be understood that in other embodiments, only the at least one first auxiliary display area or only the at least one second auxiliary display area can be provided; when only the first auxiliary display area is provided, the at least one first auxiliary display area forms the auxiliary pattern display area; and when only the second auxiliary display area is provided, the at least one second auxiliary display area forms the auxiliary pattern display area.

[0108] Embodiment 5

[0109] Embodiment 5 of the present application provides a display method of an auxiliary pattern, which utilizes the liquid crystal writing film capable of displaying the auxiliary pattern as described in Embodiment 1 or Embodiment 2 or Embodiment 3 or Embodiment 4, and includes the following processes:

[0110] The auxiliary pattern display area is driven by electricity to display the auxiliary pattern to be displayed.

[0111] When erasing the writing traces, the auxiliary pattern in the area where the eraser is located is completely erased, and after the writing traces are completely erased, the auxiliary pattern that is erased is displayed again after a set time or after receiving a display instruction.

[0112] Specifically, two buttons can be provided on the frame of the writing device or on the wall outside the writing device, one button is pressed to display the auxiliary pattern that is erased again, and the other button is pressed to stop displaying the auxiliary pattern.

[0113] It can be understood that in other embodiments, only one button can be provided, and when the button is pressed for a first continuous time interval (such as 1 s), the auxiliary pattern is not displayed, and when the button is pressed for a second continuous time interval (such as 2 s), the auxiliary pattern is displayed.

[0114] It can be understood that in other embodiments, the control terminal sends a display instruction of the auxiliary pattern to the controller of the liquid crystal writing film, and the controller of the liquid crystal writing film displays or does not display the auxiliary pattern according to the received instruction.

[0115] In this embodiment, the scheme of electrically driven display adopts the scheme of the prior art, and as long as the specific position of the auxiliary pattern display area can be displayed, the scheme is not described herein.

[0116] In this embodiment, when the auxiliary pattern is displayed, all the conductive areas are powered on to display, in the first direction, the position of the non-auxiliary pattern display area is driven to be erased, in the second direction, the position of the non-auxiliary pattern display area is driven to be erased, and finally only the auxiliary pattern is displayed.

[0117] It can be understood that, for the scheme described in Embodiment 1, when the auxiliary pattern includes the phonetic line and the checkered pattern, the electrically driven control mode can be used to display only the phonetic line, only the checkered pattern, or all of them. The person skilled in the art can select according to the specific working conditions, which will not be described here.

[0118] It can be understood that, in other embodiments, after the handwriting to be written is erased, an erasing completion instruction (which can be in the form of a button) is sent to the control terminal of the liquid crystal writing film, and the control terminal controls the auxiliary pattern to be displayed.

[0119] Embodiment 6:

[0120] The embodiment provides a liquid crystal writing film capable of displaying an auxiliary pattern, comprising a first conductive layer, a bistable liquid crystal layer and a second conductive layer arranged in sequence, wherein the first conductive layer is divided into two or more mutually insulated first conductive regions; the second conductive layer is divided into two or more mutually insulated second conductive regions; the first conductive regions are distributed along a first direction, and the second conductive regions are distributed along a second direction; the first direction and the second direction are perpendicular to each other in space; in some embodiments, the first conductive regions are distributed along the horizontal direction, and the second conductive regions are distributed along the vertical direction; or, the first conductive regions are distributed along the vertical direction, and the second conductive regions are distributed along the horizontal direction. The embodiment is described by taking the example that the first conductive regions are distributed along the horizontal direction, and the second conductive regions are distributed along the vertical direction.

[0121] Based on the liquid crystal writing film, a liquid crystal writing device such as a blackboard, a writing board or a drawing board can be formed.

[0122] The part where the first conductive regions and the second conductive regions overlap in space constitutes a region capable of being locally erased or a region capable of being locally electrically driven to display. The method for realizing local erasing / local electrically driven display in the embodiment is that a set voltage is applied to different conductive regions on the first conductive layer and the second conductive layer to form an erasing / display electric field in a set region, so as to drive the liquid crystal at the corresponding position to be in an erasing state / display state.

[0123] The specific implementation mode of the conductive layer being insulated and divided, and the process of realizing local erasing / local electrically driven display are both technologies disclosed in the prior art, which will not be described in detail here.

[0124] In the embodiment, there is at least one first region for displaying an auxiliary pattern such as a phonetic line or a checkered pattern or a square pattern, so as to facilitate the user to write phonetic spelling or English words or Chinese characters for practice; the first region can be the entire writing film region, or a set partial region on the writing film, which can be set by the person skilled in the art as needed.

[0125] Specifically, in combination withFigure 10 The first conductive region in the first area includes a first width w1 conductive region and a second width w2 conductive region; there is at least one second width w2 conductive region between two adjacent first width w1 conductive regions;

[0126] The second conductive region in the first area includes a third width w3 conductive region and a fourth width w4 conductive region; there is at least one fourth width w4 conductive region between two adjacent third width w3 conductive regions.

[0127] The first width w1 conductive region and / or the third width w3 conductive region correspond to the display state of the liquid crystal, so as to display the corresponding auxiliary pattern in the first area; the auxiliary pattern is a pinyin line or a checkered pattern or a square pattern. For example, when only the first width w1 conductive region corresponds to the display state of the liquid crystal, the auxiliary pattern displays a pinyin line; when the first width w1 conductive region and the third width w3 conductive region both correspond to the display state of the liquid crystal, the auxiliary pattern displays a checkered pattern or a square pattern.

[0128] In the embodiment, w1, w2, w3 and w4 are set values, wherein the first width w1 and the third width w3 correspond to the thickness of the line in the auxiliary pattern, such as the thickness of the pinyin line or the thickness of the checkered pattern line; the second width w2 and the fourth width w4 correspond to the interval between two adjacent lines in the auxiliary pattern, such as the interval between two adjacent pinyin lines, or the interval between the upper line and the horizontal middle line in the checkered pattern, etc. The specific values of w1, w2, w3 and w4 can be determined according to actual needs and the size of the entire writing film.

[0129] It should be noted that, since the liquid crystal writing film in the embodiment has a local erasing function, if the auxiliary pattern is also erased during local erasing, the complete auxiliary pattern is displayed again after the writing trace is completely erased, or within a set time after the auxiliary pattern is erased.

[0130] In addition, the liquid crystal writing film or the liquid crystal writing device is also provided with an auxiliary pattern switching button. Pressing the switching button can display one auxiliary pattern, and pressing the switching button again can display another auxiliary pattern.

[0131] Alternatively, a selection button can be provided for each auxiliary pattern. Pressing the corresponding selection button can display the auxiliary pattern corresponding to the button.

[0132] As an optional embodiment, the liquid crystal writing film further includes at least one second area for display; the second area can be arranged at any position of the writing film, and is usually arranged at the top area of the writing film.

[0133] On this basis, further comprising: a control unit, a positioning unit and a digital, symbol and / or letter display area set at a position on the writing film; the positioning unit can position the area where the selected digital or letter is located and send it to the control unit, and the control unit can display the digital, symbol or letter corresponding to the positioning position in the second area; as an example, when the user's finger touches to select a certain digital, symbol or letter, the positioning unit can position the position and send the positioned position to the control unit, and each positioning position corresponds to a digital, symbol or letter, and the control unit can determine the content selected by the user based on the positioning position and display it in the second area.

[0134] The positioning unit of the present embodiment adopts the original positioning device of the liquid crystal writing film, such as infrared positioning, capacitive positioning and electromagnetic positioning.

[0135] In the present embodiment, the digital, symbol and / or letter display area set at a position on the writing film can display the digital, symbol and / or letter by means of silk-screen printing, inkjet printing, laser printing or laser etching; at this time, these digital, symbol and / or letter are shallowly engraved on the writing film, and the user can see these contents, while the digital, symbol and / or letter display area can still be normally written and erased.

[0136] Alternatively, the display of digital, symbol and / or letter can also be realized by driving the liquid crystal in the set area to display, i.e. electrically driven display; it should be noted that when the display is realized by electrically driven display, the displayed digital or letter is in the form of segment code or dot matrix; in this case, in order to avoid accidental erasure, the partial erasing function of the display area can be disabled.

[0137] The setting of the second area and the digital, symbol and / or letter display area of the present embodiment can make the liquid crystal writing film have the functions of calculator, answerer, sudoku practice or mathematical operation practice, etc.; specifically, in combination with FIG. 11(a), the display of digital and symbol can be used to display certain digital and operation symbol, such as displaying the operation digital 0-9 and the basic operation symbols "+", "-", "x", " / ", "·" of the calculator; in combination with FIG. 11(b), the display of letter can be used to display letters, such as "A, B, C, D, E, F" as answer options; of course, in combination with FIG. 11(c), the display of digital and letter can also be used together, and when the liquid crystal writing film is in different working modes, the corresponding contents are displayed, such as: when in the calculator function mode, the selected position displays 1; and when in the answerer mode, the selected position displays A.

[0138] As a specific application example, the liquid crystal writing film comprises a calculator function mode, when the liquid crystal writing film is in the calculator function mode, the control unit can calculate the corresponding calculation result according to the selected numbers and operation symbols and the selected order, and display the calculation result in the second area.

[0139] When displaying in the second area, the liquid crystal corresponding to the conductive area of the first width w1 and / or the conductive area of the third width w3 is also controlled to be in the display state, so as to realize the display of the set numbers or operation symbols.

[0140] In addition, since the calculation process may involve decimal points, and considering the display of the auxiliary pattern lines, the first width w1 and the third width w3 are often set to be relatively narrow, at this time, the decimal point may be displayed very unobviously; therefore, the embodiment improves the segmentation mode of the conductive area of the second area, so that the decimal point can be normally displayed; the specific method is as follows:

[0141] In combination with FIGS. 12(a)-(b), in the first conductive area in the second area, the width of the conductive area of the first width w1 is increased by wt1, and the width of the conductive area of the second width w2 adjacent to the conductive area of the first width w1 is reduced by wt1; in the second conductive area in the second area, the width of the conductive area of the third width w3 is increased by wt2, and the width of the conductive area of the fourth width w4 adjacent to the conductive area of the third width w3 is reduced by wt2; wherein wt1 and wt2 are set values, which can be equal or not equal, and the specific values can be selected according to actual needs.

[0142] By increasing the width of the conductive area of the first width w1 and the conductive area of the third width w3 in the second area, the displayed content can be thickened to some extent, so that the display of the decimal point becomes more obvious.

[0143] Optionally, a calculator function button is arranged on the liquid crystal writing film or the liquid crystal writing device, and after the calculator function button is pressed, the calculator function mode is entered, at this time, the local erasing function of the button and the display area is disabled.

[0144] As another specific application example, the liquid crystal writing film comprises a test paper function mode, when the liquid crystal writing film is in the test paper function mode, the control unit can display the selected letter options in the second area, and transmit the test paper options to the receiving terminal.

[0145] Specifically, the liquid crystal writing film or the liquid crystal writing device is provided with a test answerer function button and a send / confirm button. After the test answerer function button is pressed, the test answerer function mode is entered. At this time, the button and the partial erasing function of the display area can be disabled. One of the test answer options can be selected, or two or more of the test answer options can be selected in succession. After the selection is completed, the send / confirm button is clicked. The selected answer is sent to the receiving terminal.

[0146] As another specific application example, the liquid crystal writing film includes a Sudoku function mode. When the liquid crystal writing film is in the Sudoku function mode, the control unit can control the display of a Sudoku test question in the second area. At the same time, the control unit can display the selected number in the Sudoku test question at the position selected in the number, symbol and / or letter display area. After the completion of the Sudoku test question, the control unit can judge and feed back whether the test answer is correct.

[0147] Specifically, the liquid crystal writing film or the liquid crystal writing device is provided with a Sudoku function button. The previous question or the next question or the redo or the confirmation or other Sudoku function buttons can also be provided. The control unit has a pre-stored Sudoku question bank and answer. After the Sudoku function button is pressed, the Sudoku function mode is entered. At this time, the button and the partial erasing function of the display area can be disabled. The control unit retrieves the Sudoku test question from the Sudoku question bank and displays it in the second area. The user can use the pressure writing function to make attempts or calculations on the Sudoku test question in advance. After the answer is determined, the corresponding position in the test question is clicked. Then, the answer to be filled in is selected in the number, symbol and / or letter display area. The confirm button is clicked. At this time, the corresponding position in the test question displays the selected number through electric driving. In order to facilitate the distinction, the displayed data font can be different from the original number font in the test question. In this way, after all the positions to be filled in the Sudoku test question are filled in, the system will give a correct or incorrect prompt, such as the color feedback of the indicator light. The error test question can be redone through the redo button. The next question or the previous question or other functions can also be selected.

[0148] As another specific application example, similar to the Sudoku function, the liquid crystal writing film includes a practice question function mode. When the liquid crystal writing film is in the practice question function mode, the control unit can control the display of a mathematical operation practice question in the second area. At the same time, the control unit can display the selected number in the mathematical operation practice question at the corresponding position. After the completion of the mathematical operation practice question, the control unit can judge and feed back whether the test answer is correct.

[0149] Specifically, the practice question function button is arranged on the liquid crystal writing film or the liquid crystal writing device, and a previous question or a next question or a redo or a confirmation or the like practice question function button can also be arranged. The mathematical operation question bank and the answers are pre-stored in the control unit; after the practice question function button is pressed, the practice question function mode is entered, at this time, the key and the partial erasing function of the display area can be disabled; the control unit retrieves the mathematical operation question in the mathematical operation question bank and displays it in the second area; the user can try or calculate on the Sudoku test question in advance through the pressure writing function, and after the answer is determined, the answer to be filled in is selected in the number, symbol and / or letter display area, and the confirmation key is clicked, at this time, the corresponding position in the test question displays the selected number through the electric driving mode, the control unit determines the filled answer through the position signal fed back by the positioning unit, and compares it with the standard answer to judge whether it is correct and give feedback.

[0150] It should be noted that the above calculator function button, answerer function button, Sudoku function button and practice question function button and the like can be a separate function button, or a switching button, that is, one press of the switching button enters a function mode, and another press of the switching button enters another function mode.

[0151] The embodiment further increases the calculator, answerer, Sudoku practice and / or practice question functions on the basis of the display of the auxiliary pattern such as the pinyin line, the Tianzi grid and the square grid, greatly enriches the functions of the liquid crystal writing device, and improves the convenience of education and teaching.

[0152] Embodiment 7:

[0153] The embodiment provides a liquid crystal writing film capable of displaying an auxiliary pattern, comprising a first conductive layer, a bistable liquid crystal layer and a second conductive layer arranged in sequence, wherein the first conductive layer is divided into two or more mutually insulated first conductive areas; the second conductive layer is divided into two or more mutually insulated second conductive areas; the first conductive areas are distributed along a first direction, and the second conductive areas are distributed along a second direction, and the first direction and the second direction are perpendicular to each other in space. The widths of the first conductive areas and the second conductive areas are set according to actual needs, and the widths of the two can be the same or different.

[0154] In some embodiments, the first conductive areas are distributed along the horizontal direction, and the second conductive areas are distributed along the vertical direction; or the first conductive areas are distributed along the vertical direction, and the second conductive areas are distributed along the horizontal direction. The embodiment is described by taking the example that the first conductive areas are distributed along the horizontal direction, and the second conductive areas are distributed along the vertical direction.

[0155] Based on the liquid crystal writing film, a liquid crystal writing device such as a blackboard, a writing board or a drawing board and the like can be formed.

[0156] The part where the first conductive region and the second conductive region overlap in space constitutes a region that can be locally erased or a region that can be locally electrically driven to display. The method for realizing local erasing / local electrically driven display in this embodiment is to apply a set voltage to different conductive regions on the first conductive layer and the second conductive layer to form an erasing / display electric field in the set region, so as to drive the liquid crystal at the corresponding position to the erasing state / display state.

[0157] The specific implementation of the above-mentioned conductive layer being insulated and divided, and the above-mentioned process of realizing local erasing / local electrically driven display are both technologies disclosed in the prior art, and will not be described in detail here.

[0158] In this embodiment, it also includes at least one second region, a control unit, a positioning unit, and a number, symbol, and / or letter display region arranged at a set position on the writing film; the positioning unit can position the region where the selected number or letter is located and send it to the control unit, and the control unit can display the number, symbol, or letter corresponding to the positioning position in the second region based on the positioning position.

[0159] The number, symbol, and / or letter display region is arranged in the same way as in Embodiment 6, and will not be described again.

[0160] As a specific application example, the liquid crystal writing film in this embodiment includes a calculator function mode, and when the liquid crystal writing film is in the calculator function mode, the control unit can calculate the corresponding calculation result according to the selected numbers and symbols and the selected order, and display it in the second region.

[0161] A calculator function button is arranged on the liquid crystal writing film or the liquid crystal writing device, and after the calculator function button is pressed, the calculator function mode is entered, at which time the local erasing function of the button and the display region can be disabled.

[0162] As another specific application example, the liquid crystal writing film in this embodiment includes a test answerer function mode, and when the liquid crystal writing film is in the test answerer function mode, the control unit can display the selected letter option in the second region and transmit the test answer option to the receiving terminal. The specific working process and setting of the test answerer function mode are the same as in Embodiment 6, and will not be described again.

[0163] As another specific application example, the liquid crystal writing film of the embodiment includes a Sudoku function mode. When the liquid crystal writing film is in the Sudoku function mode, the control unit can control the display of a Sudoku test question in the second area. Meanwhile, the control unit can display the selected number in the Sudoku test question at the selected position according to the selected number in the number, symbol and / or letter display area and the selected position in the Sudoku test question. After the completion of a Sudoku test question, the control unit can judge and feedback whether the answer is correct. The specific working process and setting of the Sudoku function mode are the same as those in Embodiment 6, and are not described in detail.

[0164] As another specific application example, the liquid crystal writing film includes a practice question function mode. When the liquid crystal writing film is in the practice question function mode, the control unit can control the display of a mathematical operation practice question in the second area. Meanwhile, the control unit can display the selected number in the mathematical operation practice question at the corresponding position according to the selected number in the number, symbol and / or letter display area. After the completion of a mathematical operation practice question, the control unit can judge and feedback whether the answer is correct. The specific working process and setting of the practice question function mode are the same as those in Embodiment 6, and are not described in detail.

[0165] The embodiment adds a calculator / answerer / Sudoku practice / mathematical practice and the like to the liquid crystal writing film or writing device with the partial erasing function, greatly enriches the functions of the liquid crystal writing device, and improves the convenience of education and teaching.

[0166] Embodiment 8:

[0167] The embodiment discloses a liquid crystal writing board, which includes any one of the liquid crystal writing films capable of displaying auxiliary patterns disclosed in Embodiments 1-7.

[0168] The above only describes the preferred embodiments of the present application and is not used to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement and the like within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A liquid crystal writing film capable of displaying an auxiliary pattern, comprising a first conductive layer, a liquid crystal layer and a second conductive layer, characterized in that, the first conductive layer is divided into a plurality of mutually insulated first conductive regions along a first direction, and at least one of the first conductive regions has at least one continuous first auxiliary display region, and the distance between two insulation division lines along the first direction in the first auxiliary display region is a first set value; the second conductive layer is divided into a plurality of mutually insulated second conductive regions along a second direction, and at least one of the second conductive regions has at least one continuous second auxiliary display region, and the distance between two insulation division lines along the second direction in the second auxiliary display region is a second set value; the first direction and the second direction are perpendicular, the first set value is the first direction line width of the auxiliary pattern, the second set value is the second direction line width of the auxiliary pattern, and at least one first auxiliary display region and at least one second auxiliary display region combine to form an auxiliary pattern display region.

2. The liquid crystal writing film capable of displaying an auxiliary pattern according to claim 1, characterized in that, in the first conductive region having the first auxiliary display region, the distance between two insulation division lines along the first direction at a position other than the first conductive region is a third set value, and the first set value is smaller than the third set value; or, in the second conductive region having the second auxiliary display region, the distance between two insulation division lines along the second direction at a position other than the second conductive region is a fourth set value, and the second set value is smaller than the fourth set value; or, the auxiliary pattern at least includes four first auxiliary display regions combined to form mutually parallel pinyin lines, and the distance between adjacent pinyin lines is equal; or, the auxiliary pattern at least includes a checkered pattern composed of three first auxiliary display regions and three second auxiliary display regions, and the distance between adjacent first auxiliary display regions is equal, and the distance between adjacent second auxiliary display regions is equal; or, the auxiliary pattern at least includes: four first auxiliary display regions combined to form pinyin lines and a checkered pattern composed of three first auxiliary display regions and three second auxiliary display regions, and the checkered pattern is located on the upper side or the lower side of the pinyin lines.

3. A liquid crystal writing film capable of displaying an auxiliary pattern, comprising a first conductive layer, a liquid crystal layer and a second conductive layer, characterized in that, the first conductive layer is divided into a plurality of mutually insulated first conductive regions along a first direction, and at least one of the first conductive regions has at least one continuous first auxiliary display region, and the distance between two insulation division lines along the first direction in the first auxiliary display region is a first set value; at least one first auxiliary display region forms an auxiliary pattern display region.

4. The liquid crystal writing film capable of displaying an auxiliary pattern according to claim 3, characterized in that, the auxiliary pattern at least includes four first auxiliary display regions combined to form mutually parallel pinyin lines, and the distance between adjacent pinyin lines is equal.

5. A liquid crystal writing film capable of displaying an auxiliary pattern, comprising a first conductive layer, a liquid crystal layer and a second conductive layer, characterized in that, The first conductive layer or the second conductive layer is divided into a plurality of mutually insulated second conductive regions along the second direction, and at least one second conductive region has at least one continuous second auxiliary display region, and the distance between two insulation division lines along the second direction in the second auxiliary display region is a second set value; At least one second auxiliary display region forms a display region of an auxiliary pattern.

6. The liquid crystal writing film capable of displaying an auxiliary pattern according to any one of claims 1-5, characterized in that: A plurality of auxiliary pattern display regions are arranged at intervals along the second direction on the liquid crystal writing film; Or, The insulation division line is generated on the liquid crystal writing film in a water washing etching and laser etching manner.

7. An auxiliary pattern display method, characterized in that: The liquid crystal writing film capable of displaying an auxiliary pattern according to any one of claims 1-6 is used, The method comprises the following processes: An auxiliary pattern display region is driven by electricity to display a to-be-displayed auxiliary pattern; When erasing a writing trace, the auxiliary pattern in the area where the eraser is located is completely erased, and after a set time or after receiving a re-display instruction, the erased auxiliary pattern is re-displayed.

8. The auxiliary pattern display method according to claim 7, characterized in that: When the to-be-displayed auxiliary pattern is a pinyin line and a field pattern, only the pinyin line in the auxiliary pattern is displayed, or only the field pattern in the auxiliary pattern is displayed; Or, The auxiliary pattern is controlled by two buttons, one button is pressed to re-display the erased auxiliary pattern, and the other button is pressed to stop displaying the auxiliary pattern; Or, The auxiliary pattern is controlled by one button, when the button is pressed for a first continuous time, the auxiliary pattern is not displayed, and when the button is pressed for more than a second continuous time, the auxiliary pattern is displayed.

9. A liquid crystal writing film capable of displaying an auxiliary pattern, comprising a first conductive layer, a bistable liquid crystal layer and a second conductive layer arranged in sequence, characterized in that, The first conductive layer is divided into two or more mutually insulated first conductive regions; and the second conductive layer is divided into two or more mutually insulated second conductive regions; The first conductive regions are distributed along a first direction, and the second conductive regions are distributed along a second direction, the first direction and the second direction being perpendicular to each other in space; There is at least one first region, the first conductive regions in the first region include first-width w1 conductive regions and second-width w2 conductive regions, at least one second-width w2 conductive region exists between two adjacent first-width w1 conductive regions, the second conductive regions in the first region include third-width w3 conductive regions and fourth-width w4 conductive regions, at least one fourth-width w4 conductive region exists between two adjacent third-width w3 conductive regions, wherein w1, w2, w3 and w4 are set values; The first-width w1 conductive regions and / or the third-width w3 conductive regions are controlled to be in a display state to display an auxiliary pattern in the first region.

10. The liquid crystal writing film capable of displaying an auxiliary pattern according to claim 9, wherein The auxiliary pattern is a pinyin line, a field pattern or a square pattern.

11. The liquid crystal writing film capable of displaying an auxiliary pattern according to claim 10, wherein The required auxiliary pattern to be displayed is selected by switching a key or selecting a key.

12. The liquid crystal writing film capable of displaying an auxiliary pattern according to claim 9, wherein Further comprising: At least one second region, the second region is used for display.

13. The liquid crystal writing film capable of displaying an auxiliary pattern according to claim 9, wherein Further comprising: At least one second area for display; in a first conductive area in the second area, the width of the conductive area of the first width w1 increases by wt1, and the width of the conductive area adjacent thereto of the second width w2 decreases by wt1; in a second conductive area in the second area, the width of the conductive area of the third width w3 increases by wt2, and the width of the conductive area adjacent thereto of the fourth width w4 decreases by wt2; wherein wt1 and wt2 are set values.

14. The liquid crystal writing film capable of displaying an auxiliary pattern according to claim 12 or 13, wherein, Also comprising: a control unit, a positioning unit, and a number, symbol and / or letter display area set at a position on the writing film; The positioning unit can position the area where the selected number, symbol or letter is located and send it to the control unit, and the control unit can display the corresponding number, symbol or letter at the second area based on the positioning position.

15. The liquid crystal writing film capable of displaying an auxiliary pattern according to claim 14, wherein The liquid crystal writing film includes a calculator function mode, when the liquid crystal writing film is in the calculator function mode, the control unit can calculate the corresponding calculation result according to the selected numbers and symbols and the selection order, and display it in the second area.

16. The liquid crystal writing film capable of displaying an auxiliary pattern according to claim 14, wherein The liquid crystal writing film includes a test paper function mode, when the liquid crystal writing film is in the test paper function mode, the control unit can display the selected letter options in the second area, and transmit the test paper options to the receiving terminal.

17. The liquid crystal writing film capable of displaying an auxiliary pattern according to claim 14, wherein The liquid crystal writing film includes a Sudoku function mode, when the liquid crystal writing film is in the Sudoku function mode, the control unit can control to display a Sudoku test question in the second area; at the same time, the control unit can display the selected number in the position of the Sudoku test question according to the selected number in the number, symbol and / or letter display area and the selected position in the Sudoku test question; after a Sudoku test question is completed, the control unit can judge and feedback whether the answer is correct.

18. The liquid crystal writing film capable of displaying an auxiliary pattern according to claim 14, wherein, The liquid crystal writing film includes a practice question function mode, when the liquid crystal writing film is in the practice question function mode, the control unit can control to display a mathematical operation practice question in the second area; at the same time, the control unit can display the selected number in the corresponding position of the mathematical operation practice question according to the selected number in the number, symbol and / or letter display area; after a mathematical operation practice question is completed, the control unit can judge and feedback whether the answer is correct.

19. The liquid crystal writing film capable of displaying an auxiliary pattern according to claim 14, wherein, The number, symbol and / or letter display area is realized by ink silk screen printing, inkjet printing, laser printing or laser etching to display numbers, symbols and / or letters; Or, The number, symbol and / or letter display area is realized by driving the liquid crystal in the set area to display the number, symbol and / or letter.

20. A liquid crystal writing board, characterized by The liquid crystal writing film capable of displaying auxiliary patterns according to any one of claims 1-6, or the liquid crystal writing film capable of displaying auxiliary patterns according to any one of claims 9-19.

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