A handwriting pad with switchable reference lines and a driving method thereof

Abstract

The application relates to a handwriting board with switchable reference lines, which comprises an upper substrate, an upper electrode, a reflective medium layer, a lower electrode and a lower substrate arranged in parallel from top to bottom; the upper electrode, the reflective medium layer and the lower electrode overlap to form a touch display area; the lower electrode and the reflective medium layer are provided with a plurality of closed areas to divide the lower electrode into a plurality of pattern electrodes, and the closed areas are combined to form a reference line pattern; the upper electrode overlaps with the reference line pattern to form a reference line display area; and the above technical scheme can freely select the application requirement of required reference lines or no reference lines.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of display, in particular to a handwriting board with switchable reference lines and a driving method thereof. BACKGROUND

[0002] The cholesteric liquid crystal handwriting screen or the electromagnetic handwriting screen does not need backlight, so there is no radiation problem, and the eyes will not be tired, reading is comfortable, power is saved, and compared with the traditional blackboard teaching application, it also has no dust, can be reused, and has a real writing feeling and writing effect; it meets the needs of reducing the blue light of digital electronic products to harm the eyes and environmental protection to reduce paper use and save energy; the handwriting screen product application has gradually expanded the product market application from children graffiti, message board, notebook, education blackboard, conference interactive board and the like. For educators, primary school students or calligraphy practitioners, musicians and the like, a certain auxiliary line needs to be referred to for large-scale writing, such as the reference line of the Tianzi grid, the pinyin line, the English four-line and the like.

[0003] In the prior art, an electronic paper handwriting board with patent No. CN109166396A discloses an auxiliary line in an ink silk screen printing, ink jet printing and laser printing manner arranged in a writing area of the liquid crystal panel, or the auxiliary line is printed on a transparent film, and the transparent film is arranged in the writing area of the liquid crystal panel, but the reference line will be worn or fallen off with the increase of the use times, and the reference line will cause the problem of incoherent handwriting, affecting the writing effect; a handwriting board, a writing board and a blackboard with switchable reference lines with patent No. CN202010071953.2 disclose that a plurality of closed areas are etched on the electrodes of the handwriting board by using an etching process, and the closed areas are spliced into the reference line, which can avoid the problems of wear or falling off of the reference line and incoherent writing, but this process cannot freely select the required reference line or cancel the application requirement of the reference line. SUMMARY

[0004] In view of the deficiencies of the prior art, the present application provides a handwriting board with switchable reference lines which can freely select the required reference line or cancel the application requirement of the reference line.

[0005] The handwriting board with switchable reference lines comprises an upper substrate, an upper electrode, a reflective dielectric layer, a lower electrode and a lower substrate which are sequentially and parallelly arranged from top to bottom; the upper electrode, the reflective dielectric layer and the lower electrode overlap to form a touch display area; the lower electrode and the reflective dielectric layer are provided with a plurality of corresponding closed areas to divide the lower electrode into a plurality of pattern electrodes, the closed areas are connected and combined to form a set reference line pattern, and the upper electrode overlaps with the reference line pattern to form a reference line display area.

[0006] Further, the pattern electrode is provided with a concave or convex extension at the connecting edge of the closed area.

[0007] Further, the ratio of the distance between the pattern electrodes and the pattern electrodes is less than or equal to 1:1.

[0008] Further, the reference line pattern includes one or a combination of a square grid, a Chinese character grid, a rice character grid, a rice character back palace grid, a back palace grid, an English four-line three-grid, a four-line pinyin grid, a mathematical writing auxiliary line, or a five-line music auxiliary line.

[0009] Further, the closed area is formed by printing or etching.

[0010] Further, the upper substrate and the lower substrate are formed of PET or PI soft material.

[0011] A handwriting board driving method of a switchable reference line is applied to the above-mentioned handwriting board with switchable reference lines, and is driven by any one or a combination of both of the voltage driving circuit and the timing control circuit.

[0012] Further, the voltage driving circuit includes a full-area clearing voltage, a reset voltage, and a display voltage, the anode of the full-area clearing voltage, the reset voltage, and the display voltage is connected to the upper electrode, and the cathode of the full-area clearing voltage, the reset voltage, and the display voltage is connected to the lower electrode; the display voltage includes one or more groups of reference line pattern voltages; and the method includes the following steps:

[0013] S1, the full-area clearing voltage clears the writing area of the handwriting board;

[0014] S2, the reset voltage is switched to display all reference line patterns of the handwriting board;

[0015] S3, the display voltage is switched to select one or more groups of reference line pattern voltages to provide for display of the handwriting board.

[0016] Further, the timing control circuit has a pulse width modulation timing driving signal, which includes a full-area clearing period, a reset period, and a display period, the display period includes a pulse driving period, and a plurality of groups of driving signals provided by the driving signal setting are used to display one or more groups of reference line patterns, the full-area clearing period first clears the writing area of the handwriting board, then the reset period displays all reference line patterns of the handwriting board, and the display period provides one or more groups of reference line patterns to the handwriting board for display through the plurality of groups of driving signals.

[0017] Compared with the prior art, the present application has the following advantages:

[0018] 1. The lower electrode is divided into a plurality of patterned electrodes by a plurality of closed patterned areas, and the spacing between the patterned electrodes is used to generate the required reference line pattern by controlling the electric field, electromagnetic or capacitive effect, so that the user can freely select the auxiliary line pattern and position during writing, and the timeliness is good, which improves the writing efficiency; the simple and easy assembly process reduces the cost and improves the quality yield, and the splicing module can meet the product size and high resolution product demand;

[0019] 2. The electrode inside the liquid crystal writing film is etched in a closed area, and the closed area can display the same color as the writing trace, so that the visual experience of the writing trace is not continuous during writing; in addition, since the closed area cannot be powered, the color in the area is always displayed, and the pattern composed of auxiliary lines is always displayed, which facilitates the user to play an auxiliary reference role during writing;

[0020] 3. A concave or convex extension is designed on the edge of the patterned electrode by etching, printing and other processes, which improves the control force of the edge patterned electrode and accurately controls the electric field, electromagnetic or capacitive effect between the electrodes to generate the required reference line pattern;

[0021] 4. The spacing between the patterned electrodes and the patterned electrodes should be less than or equal to 1:1, so that the required reference line pattern can be generated by controlling the electrode spacing through the patterned electrodes;

[0022] 5. Different patterned electrodes are designed to match different electrode spacings to achieve multiple functional auxiliary line patterns;

[0023] 6. Any one or both of the voltage driving circuit and the timing control circuit are used to drive the spacing between the patterned electrodes to generate the required reference line pattern by controlling the electric field, electromagnetic or capacitive effect between the patterned electrodes; of course, the difference in the visual effect of the reference line can be converted and adjusted by the voltage level of the feedback voltage output by the voltage driving circuit, or it can be adjusted by the input timing difference of the timing control circuit. BRIEF DESCRIPTION OF DRAWINGS

[0024] The drawings described herein are used to provide a further understanding of the present application, and in the drawings:

[0025] Figure 1 is a perspective structural schematic diagram of the first embodiment of the present application;

[0026] Figure 2 is Figure 1 is a sectional view at A-A in FIG. 1;

[0027] Figure 3 is a voltage driving flowchart of the present application;

[0028] Figure 4 An auxiliary wire drive schematic diagram is generated for the timing control of the present application;

[0029] Figure 5 A cross-sectional view of embodiment two;

[0030] Figure 6 A cross-sectional view of embodiment three. DETAILED DESCRIPTION

[0031] Referring to Figures 1-4 One of the embodiments of a switchable reference line tablet, which comprises an upper substrate 1, an upper electrode 2, a reflective dielectric layer 3, a lower electrode 4 and a lower substrate 5 arranged in parallel from top to bottom; the upper electrode 2, the reflective dielectric layer 3 and the lower electrode 4 overlap to form a touch display area; the lower electrode 4 and the reflective dielectric layer 3 are provided with a plurality of closed areas 6 by printing or etching to divide the lower electrode 4 into a plurality of pattern electrodes 41, and the closed areas 6 are connected and combined to form a set of reference line patterns; the upper electrode 2 overlaps with the reference line patterns to form a reference line display area; of course, the reference line patterns include one or more combinations of square, Chinese character grid, rice character grid, rice character back palace grid, back palace grid, English four-line three-grid, four-line pinyin grid, mathematical writing auxiliary line or five-line auxiliary line, and this embodiment takes square as an example.

[0032] Further, the ratio of the spacing between the pattern electrodes 41 and the pattern electrodes 41 is less than or equal to 1:1.

[0033] Further, the upper substrate 1 and the lower substrate 5 are made of PET or PI soft material.

[0034] A switchable reference line tablet drive method is applied to the above-mentioned switchable reference line tablet, which is driven by any one or a combination of both of the voltage drive circuit and the timing control circuit.

[0035] Further, the voltage drive circuit includes full-area clearing voltage (such as 20V), reset voltage (such as -20V) and display voltage (such as 10V, 15V, etc.), the anode of the full-area clearing voltage, the reset voltage and the display voltage is switched to connect the upper electrode 2, and the cathode of the full-area clearing voltage, the reset voltage and the display voltage is switched to connect the lower electrode 4; the display voltage includes one or more groups of reference line pattern voltages; which includes the following steps:

[0036] S1, the full-area clearing voltage clears the writing area of the tablet;

[0037] S2, switch the reset voltage to display all reference line patterns of the tablet;

[0038] S3, switch display voltage, select one or more groups of reference line pattern voltage provided to the tablet display.

[0039] Further, the timing control circuit timing drive signal is pulse width modulation, including full area clear period TO, reset period T1 and display period T2, the display period T2 includes pulse drive period drive signal set of multiple groups of drive signal should be displayed one or more groups of reference line pattern, the full area clear period TO first tablet writing area for full area clear, then the reset period T1 display tablet all reference line pattern, display period T2 again through multiple groups of drive signal should be displayed one or more groups of reference line pattern provided to the tablet display.

[0040] Referring to Figure 5 and Figure 6 As shown, embodiment two and embodiment three are the same as embodiment one except that the edge shape of the pattern electrode 41 is different from that of embodiment one, and the edge of the pattern electrode 41 connected with the closed area 6 is provided with a concave extension 42 or a convex extension 43.

[0041] The working principle of the present application: using several closed pattern areas 6, the lower electrode 4 is divided into several pattern electrodes 41, and the spacing between the pattern electrodes 41 (i.e. the closed pattern area 6) is used as the required reference line pattern style generated by the electric field, electromagnetic or capacitance effect between the pattern electrodes 41, and then through the required reference line pattern style in the voltage drive circuit or the timing control circuit, the auxiliary line style and position can be freely selected during writing.

[0042] Although the embodiments of the present application have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A switchable reference line tablet, comprising an upper substrate, an upper electrode, a reflective dielectric layer, a lower electrode and a lower substrate arranged in parallel from top to bottom; the upper electrode, the reflective dielectric layer and the lower electrode overlap to form a touch display area; characterized in that: The lower electrode and the reflective medium layer are provided with a corresponding number of closed areas to divide the lower electrode into a number of pattern electrodes, and the closed areas are combined to form a reference line pattern; the upper electrode overlaps the reference line pattern to form a reference line display area; and a voltage driving circuit or a time sequence control circuit is used to drive the voltage of the required reference line pattern.

2. A switchable reference line tablet according to claim 1, wherein: The connection edges of the pattern electrodes and the closed areas are provided with concave or convex extensions.

3. A switchable reference line tablet according to claim 1, wherein: The ratio of the spacing between the pattern electrodes to the size of the pattern electrodes is less than or equal to 1:

1.

4. The switchable reference line tablet according to claim 1, wherein: The reference line pattern includes one or a combination of a square grid, a Chinese character grid, a rice character grid, a rice character back palace grid, a back palace grid, an English four-line three-grid, a four-line pinyin grid, a mathematical writing auxiliary line, or a five-line music auxiliary line.

5. The switchable reference line tablet according to claim 1, wherein: The closed areas are formed by printing or etching.

6. The switchable reference line tablet according to claim 1, wherein: The upper substrate and the lower substrate are made of PET or PI soft material.

7. A method for driving a handwriting pad with switchable reference lines, applied to the handwriting pad with switchable reference lines of any one of claims 1-6, characterized in that: The driving is performed by any one or a combination of the voltage driving circuit and the time sequence control circuit.

8. The tablet driving method with switchable reference line according to claim 7, characterized in that: The voltage driving circuit includes a full-area clearing voltage, a reset voltage, and a display voltage, the anode of the full-area clearing voltage, the reset voltage, and the display voltage is connected to the upper electrode, and the cathode of the full-area clearing voltage, the reset voltage, and the display voltage is connected to the lower electrode; the display voltage includes one or more groups of reference line pattern voltages; It includes the following steps: S1, the full-area clearing voltage clears the writing area of the handwriting board; S2, the reset voltage displays all the reference line patterns of the handwriting board; S3, the display voltage selects one or more groups of reference line pattern voltages to provide for display on the handwriting board.

9. The tablet driving method with switchable reference line according to claim 7, characterized in that: The time sequence driving signal of the time sequence control circuit is pulse width modulated, and includes a full-area clearing period, a reset period, and a display period; the display period includes a pulse driving period in which a plurality of groups of driving signals are set to display one or more groups of reference line patterns; the full-area clearing period first clears the writing area of the handwriting board, then the reset period displays all the reference line patterns of the handwriting board, and the display period provides a plurality of groups of driving signals to display one or more groups of reference line patterns on the handwriting board.

Images