WO2023070469A1 - 液晶手写面板、手写装置及其控制方法 - Google Patents

液晶手写面板、手写装置及其控制方法 Download PDF

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Publication number
WO2023070469A1
WO2023070469A1 PCT/CN2021/127187 CN2021127187W WO2023070469A1 WO 2023070469 A1 WO2023070469 A1 WO 2023070469A1 CN 2021127187 W CN2021127187 W CN 2021127187W WO 2023070469 A1 WO2023070469 A1 WO 2023070469A1
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WIPO (PCT)
Prior art keywords
substrate
liquid crystal
electrode layer
panel
handwriting
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Application number
PCT/CN2021/127187
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English (en)
French (fr)
Inventor
武晓娟
王修亮
王建
赵宇
葛杨
王家星
毕谣
段金帅
袁洪亮
韩天洋
Original Assignee
京东方科技集团股份有限公司
北京京东方光电科技有限公司
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Application filed by 京东方科技集团股份有限公司, 北京京东方光电科技有限公司 filed Critical 京东方科技集团股份有限公司
Priority to PCT/CN2021/127187 priority Critical patent/WO2023070469A1/zh
Priority to CN202180003125.8A priority patent/CN116368425A/zh
Publication of WO2023070469A1 publication Critical patent/WO2023070469A1/zh

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    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods

Definitions

  • the present application relates to the field of display technology, in particular to a liquid crystal handwriting panel, a handwriting device and a control method thereof.
  • a tablet is an electronic device used for writing and drawing.
  • the liquid crystal handwriting panel has the advantages of low power consumption and clear handwriting, and the application of the liquid crystal handwriting panel has become more and more extensive in recent years.
  • an infrared positioning device In order to partially erase the handwriting displayed on the liquid crystal handwriting panel, an infrared positioning device needs to be integrated in the liquid crystal handwriting panel.
  • an erasing tool such as an eraser
  • the position of the erasing tool on the liquid crystal handwriting panel can be determined by an infrared positioning device, so as to determine the position to be erased in the liquid crystal handwriting panel. area.
  • the liquid crystal handwriting panel can control the pixel electrodes in the area to be erased to erase the handwriting in the area to be erased.
  • the overall thickness of the liquid crystal handwriting panel will be relatively large.
  • Embodiments of the present application provide a liquid crystal handwriting panel, a handwriting device and a control method thereof. It can solve the problem that the overall thickness of the liquid crystal handwriting panel integrated with the infrared positioning device in the prior art is relatively large, and the technical scheme is as follows:
  • a liquid crystal handwriting panel comprising: a first substrate and a second substrate oppositely arranged, and a liquid crystal layer located between the first substrate and the second substrate;
  • the first substrate includes: a first substrate, a touch electrode layer on one side of the first substrate and a first driving electrode layer on one side of the first substrate, and the first driving electrodes a layer closer to the liquid crystal layer than the touch electrode layer;
  • the second substrate includes: a second substrate, a second driving electrode layer on one side of the second substrate, and a light shielding layer on one side of the second substrate;
  • one of the first driving electrode layer and the second driving electrode layer includes a plurality of pixel electrodes, and the other includes a common electrode.
  • the touch electrode layer includes: a plurality of touch electrode blocks, an orthographic projection of the touch electrode blocks on the first substrate, and at least one pixel electrode on the first substrate.
  • the orthographic projection on the bottom has overlapping areas;
  • the first substrate further includes: a plurality of touch signal lines, and the plurality of touch signal lines are electrically connected to the plurality of touch electrode blocks in one-to-one correspondence.
  • the first substrate further includes: a plurality of data lines and a plurality of thin film transistors, and the data lines communicate with the plurality of thin film transistors through the thin film transistors.
  • the pixel electrode is electrically connected;
  • the plurality of data lines and the plurality of touch signal lines are arranged on the same layer and made of the same material.
  • the first substrate further includes: a first insulating layer located between the plurality of touch signal lines and the touch electrode layer, the first insulating layer has a plurality of first via holes, The touch signal line is electrically connected to the corresponding touch electrode block through at least one of the first via holes. .
  • the first substrate further includes: a second insulating layer located between the first driving electrode layer and the touch electrode layer, and the touch electrode layer is relatively opposite to the first driving electrode layer. close to the first substrate.
  • the liquid crystal handwriting panel further includes: a spacer between the first substrate and the second substrate, and the spacer is connected to the first substrate and the second substrate. a fixed.
  • the first substrate is a flexible substrate
  • the touch electrode layer and the first driving electrode layer are located on a side of the flexible substrate close to the second substrate.
  • the first substrate is a flexible substrate, and the touch electrode layer and the first driving electrode layer are located on a side of the flexible substrate close to the second substrate;
  • the second substrate is a rigid substrate
  • the first driving electrode layer includes the common electrode
  • the second driving electrode layer includes the plurality of pixel electrodes.
  • a handwriting device comprising any of the liquid crystal handwriting panels described above, and a control assembly electrically connected to the liquid crystal handwriting panel;
  • the control component is configured to: when the liquid crystal handwriting panel is in the erasing mode, determine the position information of the area to be erased through the touch electrode layer, and apply pixel voltage, so that a voltage difference is formed between the pixel electrode in the area to be erased and the common electrode.
  • control component is further configured to: when the liquid crystal handwriting panel is in the writing mode, determine the position information of the handwriting through the touch electrode layer, and generate image information corresponding to the handwriting.
  • control component applies the pixel voltage to the pixel electrode for a duration ranging from 150 milliseconds to 650 milliseconds;
  • the cycle of the control component sensing the touch position through the touch electrode layer is in the range of 2 milliseconds to 40 milliseconds.
  • a method for controlling a handwriting device which is applied to the above-mentioned handwriting device, and the method includes:
  • the control component Based on the position information of the area to be erased, the control component applies a pixel voltage to the pixel electrodes in the area to be erased, so that the pixel electrode in the area to be erased and the common electrode Create a voltage difference.
  • the method also includes:
  • the position information of the handwriting is determined through the touch electrode layer, and image information corresponding to the handwriting is generated.
  • the method also includes:
  • detecting an external object in contact with the first substrate through the touch electrode layer to determine the mode of the liquid crystal handwriting panel includes:
  • a liquid crystal handwriting panel comprising: a first substrate and a second substrate oppositely arranged, and a liquid crystal layer between them.
  • the first substrate in the liquid crystal handwriting panel has a touch electrode layer.
  • the control component can detect the position of the contact area between the erasing tool and the first substrate through the touch electrode layer, and this position is the position of the area to be erased. After pixel voltage is applied to the pixel electrodes in the erasing area, the handwriting device can realize the erasing function of handwriting.
  • the control component can detect the position of the contact area between the writing tool and the first substrate through the touch electrode layer, and this position is the fixed position of the handwriting.
  • the corresponding image information enables the handwriting device to realize the function of saving handwriting.
  • There is no need to install an infrared positioning device in the liquid crystal handwriting panel only the touch electrode layer integrated in the first substrate can realize the function of saving or erasing handwriting, effectively reducing the overall thickness of the liquid crystal handwriting panel, and the liquid crystal
  • the width of the frame of the handwriting panel makes the screen ratio of the liquid crystal handwriting panel higher.
  • Fig. 1 is a cross-sectional view of a liquid crystal handwriting panel provided by the related art
  • Fig. 2 is a schematic diagram of the film layer structure of the liquid crystal panel in the liquid crystal handwriting panel shown in Fig. 1;
  • Fig. 3 is a schematic structural diagram of a liquid crystal handwriting panel provided by an embodiment of the present application.
  • Fig. 4 is a schematic structural diagram of a handwriting device provided by an embodiment of the present application.
  • FIG. 5 is a top view of another liquid crystal handwriting panel provided by the implementation of the present application.
  • Fig. 6 is a schematic diagram of the film layer structure of a first substrate provided by the embodiment of the present application.
  • Fig. 7 is a schematic diagram of the film layer structure of another liquid crystal handwriting panel provided by the embodiment of the present application.
  • Fig. 8 is a top view of the first substrate in the liquid crystal handwriting panel shown in Fig. 7;
  • Fig. 9 is a schematic diagram of the film layer structure at A-A' place in Fig. 8;
  • Fig. 10 is a top view of a second substrate in the liquid crystal handwriting panel shown in Fig. 7;
  • Fig. 11 is a schematic view of the film layer structure at B-B' in Fig. 10;
  • Fig. 12 is another top view of the first substrate in the liquid crystal handwriting panel shown in Fig. 7;
  • Fig. 13 is a schematic view of the film layer structure at C-C' place in Fig. 12;
  • Fig. 14 is a top view of the liquid crystal handwriting panel shown in Fig. 7;
  • Fig. 15 is a schematic diagram of the film layer structure of another liquid crystal handwriting panel provided by the embodiment of the present application.
  • Fig. 16 is a top view of the first substrate in the liquid crystal handwriting panel shown in Fig. 15;
  • Fig. 17 is a schematic diagram of the film layer structure at D-D' of the first substrate shown in Fig. 16;
  • Fig. 18 is a top view of a second substrate in the liquid crystal handwriting panel shown in Fig. 15;
  • Fig. 19 is a schematic diagram of the film layer structure at E-E' of the second substrate shown in Fig. 18;
  • Fig. 20 is another top view of the first substrate in the liquid crystal handwriting panel shown in Fig. 15;
  • FIG. 21 is another top view of the second substrate in the liquid crystal handwriting panel shown in FIG. 15 .
  • FIG. 1 is a cross-sectional view of a liquid crystal handwriting panel provided in the related art
  • FIG. 2 is a schematic diagram of the layer structure of the liquid crystal panel in the liquid crystal handwriting panel shown in FIG. 1
  • the liquid crystal handwriting panel 00 may generally include: a liquid crystal panel 01 and an infrared positioning device 02 .
  • the liquid crystal panel 01 may include: a first substrate 011 and a second substrate 012 disposed opposite to each other, and a liquid crystal layer 013 between them.
  • the first substrate 011 usually has a plurality of pixel electrodes 0111 and a light-shielding layer 0112 (such as a black paint layer or a black aluminum honeycomb board) arranged in an array, and the plurality of pixel electrodes 0111 are closer to the second substrate 012 than the light-shielding layer 0112 .
  • the second substrate 012 has a planar common electrode 0121 .
  • the liquid crystal molecules in the liquid crystal layer 013 may be bistable liquid crystal molecules.
  • the infrared positioning device 02 in the liquid crystal handwriting panel 00 may include: a fixing frame 021 , an infrared emitting unit 022 and an infrared receiving unit 023 .
  • the fixing frame 021 is used for fixing the infrared emitting unit 022 and the infrared receiving unit 023
  • the fixing frame 021 is generally located around the periphery of the liquid crystal panel 01 and is higher than the display surface of the liquid crystal panel 01 . For example, there is a height difference h between the end surface of the fixing frame 021 and the display surface of the liquid crystal panel 01 .
  • the infrared emitting unit 022 can emit infrared light to the infrared receiving unit 023, and the infrared light received by the infrared receiving unit 023 can determine the position of an external object (eg, a writing tool or an erasing tool) on the liquid crystal panel 01 .
  • an external object eg, a writing tool or an erasing tool
  • the writing instrument for example, a writing pen
  • the writing instrument can apply pressure to the liquid crystal panel 01, so that part of the liquid crystal molecules in the liquid crystal layer 013 in the liquid crystal panel 01 are subject to the external pressure and form a focal conic texture. into a planar texture.
  • the liquid crystal molecules transformed into planar texture can reflect light of a certain wavelength (for example, green light) in the incident ambient light, so that the liquid crystal handwriting panel can display handwriting.
  • the moving track of the writing tool can be determined by the infrared positioning device 02, so as to ensure that the liquid crystal handwriting panel can generate image information corresponding to the handwriting based on the moving track.
  • the liquid crystal handwriting panel can send the image information to other display devices (for example, computers or mobile phones), so that other display devices can also display the handwriting on the liquid crystal handwriting panel.
  • the erasing tool for example, blackboard eraser
  • the infrared light that the liquid crystal handwriting panel 00 sent by the infrared positioning device 02 determined that the erasing tool was on the liquid crystal panel 01
  • the position above, and then the area to be erased can be determined in the liquid crystal handwriting panel 00.
  • the liquid crystal handwriting panel can apply a voltage to the pixel electrodes in the area to be erased, so that a voltage difference can be formed between the pixel electrodes in the area to be erased and the common electrode, and then the liquid crystal molecules in the area to be erased Under the action of voltage difference, the liquid crystal molecules can be rearranged from planar texture to focal conic texture. In this way, the liquid crystal molecules transformed into the focal conic texture can transmit the incident ambient light, so that the area to be erased can present the background with the same color as the light-shielding layer 0112, thereby realizing the erasing of the handwriting in the area to be erased. remove.
  • the red positioning device 02 can accurately detect external objects (such as writing tools or erasing tools) in contact with the liquid crystal panel 01, it is necessary to ensure the height between the end surface of the fixing frame 021 and the display surface of the liquid crystal panel 01. Only when the difference h is large, the infrared light emitted by the infrared emitting unit 022 in the red positioning device 02 can be received by the infrared receiving unit 023 . In this way, the overall thickness of the liquid crystal handwriting panel 00 will be thicker.
  • both the infrared emitting unit 022 and the infrared receiving unit 023 need to be fixed by the fixing frame 021 , and the fixing frame 021 is located around the periphery of the liquid crystal panel 01 . Therefore, the borders W1 and W2 of the liquid crystal handwriting panel 00 are generally larger, resulting in a lower screen-to-body ratio of the liquid crystal handwriting panel 00 .
  • FIG. 3 is a schematic structural diagram of a liquid crystal handwriting panel provided in an embodiment of the present application.
  • the liquid crystal handwriting panel 000 may include: a first substrate 100 and a second substrate 200 disposed opposite to each other, and a liquid crystal layer 300 located between the first substrate 100 and the second substrate 200 .
  • the first substrate 100 in the liquid crystal handwriting panel 000 may include: a first substrate 101 , a touch electrode layer 102 located on one side of the first substrate 101 , and a first driving electrode layer 103 displaced from the first substrate 101 .
  • both the touch electrode layer 102 and the first driving electrode layer 103 may be located on a side of the first substrate 101 close to the second substrate 200 .
  • the first driving electrode layer 103 is closer to the liquid crystal layer 300 than the touch electrode layer 102 .
  • the second substrate 200 in the liquid crystal handwriting panel 000 may include: a second substrate 201 , a second driving electrode layer 202 on one side of the second substrate 201 , and a light shielding layer 203 on one side of the second substrate 201 .
  • the light-shielding layer 203 is generally a black film layer, which ensures that all light from the light-transmitting first substrate 100 and the second substrate 200 can be absorbed by the light-shielding layer 203, so that the liquid crystal handwriting panel as a whole can present a black background.
  • the second driving electrode layer 202 may be located on the side of the second substrate 201 close to the first substrate 100
  • the light shielding layer 203 may be located on the side of the second substrate 201 away from the first substrate 100
  • the light shielding layer 203 may also be located on the side of the second substrate 201 away from the first substrate 100.
  • both the second driving electrode layer 202 and the light shielding layer 203 are located on the side of the second substrate 201 close to the first substrate 100, the second driving electrode layer 202 is closer to the liquid crystal layer 300 than the light shielding layer 203, And there is an insulating layer between the second driving electrode layer 202 and the light-shielding layer 203 to insulate the second driving electrode layer 202 from the light-shielding layer 203 to prevent the conductive light-shielding layer 203 from affecting the second driving electrode layer 202. electric signal.
  • one of the first driving electrode layer 103 and the second driving electrode layer 202 includes a plurality of pixel electrodes 400 (not marked in FIG. 3 , but marked in subsequent drawings), and the other includes The common electrode 500 (not marked in FIG. 3 , but marked in subsequent figures). That is, when the first driving electrode layer 103 is a plurality of pixel electrodes 400, the second driving electrode layer 202 is the common electrode 500; when the first driving electrode layer 103 is the common electrode 500, the second driving electrode layer 202 is A plurality of pixel electrodes 400 .
  • the plurality of pixel electrodes 400 are block-shaped, and the plurality of pixel electrodes 400 can be arranged in an array in the liquid crystal handwriting panel 000, and the common electrode 500 can be a planar electrode.
  • the liquid crystal layer 300 in the liquid crystal handwriting panel 000 may be a layer of bistable liquid crystal molecules, that is, the liquid crystal molecules in the liquid crystal layer 300 are bistable liquid crystal molecules.
  • FIG. 4 is a schematic structural diagram of a handwriting device provided in an embodiment of the present application.
  • the handwriting device 001 may include: LCD handwriting panel 000 and control component 010.
  • the liquid crystal handwriting panel 000 may be the liquid crystal handwriting panel shown in FIG. 3
  • the control component 010 may be electrically connected with the liquid crystal handwriting panel 000 .
  • the control component 010 in the handwriting device 001 It is electrically connected with the first substrate 100 .
  • the control component 010 can be electrically connected to the touch electrode layer 102 and the plurality of pixel electrodes 400 in the first substrate 100 .
  • the control component in the handwriting device 001 010 are electrically connected to the first substrate 100 and the second substrate 200 respectively.
  • the control component 010 may be electrically connected to the touch electrode layer 102 and the common electrode 500 in the first substrate 100 and the plurality of pixel electrodes 400 in the second substrate 200 .
  • control component 010 can be configured to: when the liquid crystal handwriting panel 000 is in the erasing mode, determine the position information of the area to be erased through the touch electrode layer 102, and apply a pixel voltage to the pixel electrode 400 in the area to be erased , so that a voltage difference is formed between the pixel electrode 400 and the common electrode 500 in the area to be erased.
  • control component 010 can also be configured to: when the liquid crystal handwriting panel 000 is in the writing mode, the position information of the handwriting can be determined through the touch electrode layer 102, and the image information corresponding to the handwriting can be generated.
  • the capacitance value in the contact area between the external object and the first substrate 100 will change.
  • the touch electrode layer 102 in a substrate 100 can sense the area where the capacitance value changes, and then can determine the position of the contact area between the external object and the first substrate 100 .
  • the bistable liquid crystal molecules in the liquid crystal layer 300 in the liquid crystal handwriting panel 000 changes from the focal conic texture to the planar texture under the action of external pressure.
  • the bistable liquid crystal molecules with a planar texture can reflect light of a certain wavelength (for example, green light) in the ambient light irradiated on the liquid crystal handwriting panel 000, so that the liquid crystal handwriting panel 000 can display corresponding writing handwriting.
  • the control component 010 can determine the position information of the writing instrument in contact with the first substrate 100 through the touch electrode layer 102, so as to determine the position information of the handwriting, and generate an image corresponding to the handwriting information. Therefore, the handwriting device can realize the function of saving handwriting. Subsequently, the control component 010 can send the image information to other display devices (for example, computers or mobile phones), so that other display devices can also display handwriting on the liquid crystal handwriting panel 000 .
  • other display devices for example, computers or mobile phones
  • the control component 010 can determine the position information of the area to be erased through the touch electrode layer 102 .
  • the control component 010 can apply a voltage to the pixel electrode 400 in the area to be erased according to the position information of the area to be erased, so that a voltage difference can be formed between the pixel electrode 400 in the area to be erased and the common electrode 500 .
  • the molecules of the liquid crystal layer in the area to be erased in the liquid crystal handwriting panel 000 are rearranged under the action of the voltage difference, that is, the liquid crystal molecules can change from a planar texture to a focal conic texture. In this way, the liquid crystal molecules transformed into the focal conic texture can transmit the incident ambient light, so that the area to be erased can present a black background with the same color as the light shielding layer 203 .
  • the handwriting device can realize the function of erasing handwriting in a local area.
  • the touch electrode layer 102 provided in the first substrate 100 can be used to determine the position of the contact area between the external object (erasing tool or writing tool) and the first substrate 100, so that the handwriting device can realize Save or erase function for handwriting.
  • the handwriting device can realize Save or erase function for handwriting.
  • There is no need to install an infrared positioning device in the liquid crystal handwriting panel 000 which effectively reduces the overall thickness of the liquid crystal handwriting panel 000 and increases the screen ratio of the liquid crystal handwriting panel 000 .
  • the liquid crystal handwriting panel provided by the embodiment of the present application includes: a first substrate and a second substrate oppositely arranged, and a liquid crystal layer between them.
  • the first substrate in the liquid crystal handwriting panel has a touch electrode layer.
  • the control component can detect the position of the contact area between the erasing tool and the first substrate through the touch electrode layer, and this position is the position of the area to be erased. After pixel voltage is applied to the pixel electrodes in the erasing area, the handwriting device can realize the erasing function of handwriting.
  • the control component can detect the position of the contact area between the writing tool and the first substrate through the touch electrode layer, and this position is the fixed position of the handwriting.
  • the corresponding image information enables the handwriting device to realize the function of saving handwriting.
  • There is no need to install an infrared positioning device in the liquid crystal handwriting panel only the touch electrode layer integrated in the first substrate can realize the function of saving or erasing handwriting, effectively reducing the overall thickness of the liquid crystal handwriting panel, and the liquid crystal
  • the width of the frame of the handwriting panel makes the screen ratio of the liquid crystal handwriting panel higher.
  • the control component 010 can detect external objects in contact with the first substrate 100 through the touch electrode layer 102 to determine the mode of the liquid crystal handwriting panel 000 .
  • the control component 010 determines that the liquid crystal handwriting panel 000 is in the erasing mode
  • the position information of the contact of the foreign object with the first substrate 100 is determined as the position information of the area to be erased;
  • the position information of the contact of the external object with the first substrate 100 is determined as the position information of the handwriting.
  • control component 010 detects external objects in contact with the first substrate 100 through the touch electrode layer 102, and determines the mode of the liquid crystal handwriting panel 000.
  • control component 010 detects external objects in contact with the first substrate 100 through the touch electrode layer 102, and determines the mode of the liquid crystal handwriting panel 000.
  • the embodiment of the present application uses the following three The optional implementation mode is taken as an example for schematic illustration:
  • the control component 010 can detect the size of the contact area between the external object and the first substrate 100 through the touch electrode layer 102 to distinguish between the writing mode and the erasing mode. For example, when the area of the contact area between the foreign object and the first substrate 100 is large, the control component 010 may determine that the liquid crystal handwriting panel 000 is in the erasing mode, thus, the foreign object is regarded as an erasing tool. When the area of the contact area between the external object and the first substrate 100 is small, the control component 010 can determine that the liquid crystal handwriting panel 000 is in the writing mode, thus, the external object is regarded as a writing tool.
  • the capacitance values in the areas of the first substrate 100 that are in contact with foreign objects of different materials vary in different amounts, and The variation of the capacitance value can be sensed through the touch electrode layer 102 , and then it can be obtained which material of the foreign object is in contact with the first substrate 100 .
  • the writing tool and the erasing tool can be made of different materials, and the control component 010 can detect the capacitance change after the contact between the external object and the first substrate 100 through the touch electrode layer 102, so as to compare the writing mode and the erasing mode. Make a distinction.
  • the control component 010 can determine that the liquid crystal handwriting The panel 000 is in the erasing mode; when the amount of capacitance change generated after the contact between the foreign object and the first substrate 100 is within the range of the capacitance change generated after the contact between the writing instrument and the first substrate 100, the control component 010 can determine The LCD handwriting panel 000 is in writing mode.
  • the handwriting device 001 can simultaneously detect the area of the contact area between the external object and the first substrate 100 and the area of the external object through the touch electrode layer 200.
  • the capacitance change amount after contact with the first substrate 100 determines the mode of the liquid crystal handwriting panel 000 .
  • the control component 010 can determine that the liquid crystal handwriting panel 000 is in the erasing mode after the contact between the external object and the first substrate 100, when the ratio of the capacitance change to the contact area is within the threshold range corresponding to the writing tool, the control component 010 can determine that the liquid crystal handwriting panel 000 is in the writing mode.
  • the handwriting device can also determine the mode of the liquid crystal handwriting panel 000 by interacting with an erasing tool (such as an eraser) (for example, the eraser instructs the liquid crystal handwriting panel to enter the erasing mode or writing mode).
  • an erasing tool such as an eraser
  • the handwriting device can also determine the mode of the liquid crystal handwriting panel 000 through an external command.
  • FIG. 5 is a top view of another liquid crystal handwriting panel provided in the implementation of the present application.
  • the touch electrode layer 102 in the liquid crystal handwriting panel 000 may include: a plurality of touch electrode blocks 102a.
  • the orthographic projection of the touch electrode block 102 a in the touch electrode layer 102 on the first substrate 101 overlaps with the orthographic projection of at least one pixel electrode 400 on the first substrate 101 .
  • each touch electrode block 102a may correspond to at least one pixel electrode 400, and the orthographic projection of each pixel electrode 400 on the first substrate 101 is located on the corresponding touch electrode block 102a on the first substrate 101. In orthographic projection.
  • the number of pixel electrodes 400 corresponding to each touch electrode block 102a may be the same, so as to ensure the effect of erasing handwriting on the liquid crystal handwriting panel 000 .
  • the number of pixel electrodes 400 may be an integer multiple of the number of touch electrode blocks 102 a in the touch electrode layer 102 .
  • each touch electrode block 102 a may correspond to four pixel electrodes 400 , and the four pixel electrodes 400 are arranged in two rows and two columns.
  • the area where the four pixel electrodes 400 corresponding to each touch electrode block 102a can form a minimum erasing area.
  • the touch electrode block 102a corresponding to the four pixel electrodes 400 senses the capacitance change, the handwriting displayed in the smallest erasing area composed of the areas where the four pixel electrodes 400 are located can be erased.
  • the size of the smallest touch unit (that is, the size of a single touch electrode block 102a) is the same as the size of the smallest erasing area.
  • the size of the minimum erasing area can be regulated.
  • the first substrate 100 in the liquid crystal handwriting panel 000 may further include: a plurality of touch signal lines Tx.
  • the plurality of touch signal lines Tx may be electrically connected to the plurality of touch electrode blocks 102a in one-to-one correspondence.
  • each touch signal line Tx in the liquid crystal handwriting panel 000 can be electrically connected to the control component 010, and the control component 010 can apply touch signals to multiple touch signal lines Tx simultaneously.
  • the control component 010 can apply touch signals to multiple touch signal lines Tx simultaneously.
  • the capacitance value between the external object and the touch electrode block 102a in the contact area of the first substrate 100 will change, so that the contact with the touch electrode block 102a in the contact area
  • the touch signal loaded on the touch signal line Tx connected to the electrode block 102a will change, and the control component can realize the contact between the external object and the first substrate 100 by sensing the touch signal line Tx where the touch signal changes. location of the region.
  • the orthographic projection of the pixel electrode 400 on the first substrate 101 does not coincide with the orthographic projection of the touch signal line Tx on the first substrate 101, so as to ensure that the touch signal loaded on the touch signal line Tx will not affect
  • the pixel voltage loaded on the pixel electrode 400 interferes, and it can also ensure that the ambient light reflected from the bistable liquid crystal molecules in the area where the pixel electrode 400 is located will not be blocked by the touch signal line Tx, so that the liquid crystal
  • the handwriting displayed on the handwriting panel 000 has a better display effect.
  • a plurality of pixel electrodes 400 in the liquid crystal handwriting panel 000 may be arranged in an array, and at least one touch signal line Tx may be arranged between two columns of adjacent pixel electrodes 400 .
  • the orthographic projections of the touch signal lines Tx on the first substrate 101 are evenly or regularly distributed.
  • the number of touch signal lines Tx arranged between every two columns of pixel electrodes 400 is the same, or adjacent touch signal lines Tx include the same number of columns of pixel electrodes 400 . In this way, it can be ensured that the touch signal lines Tx are evenly or substantially evenly distributed in the first substrate 100 , and the display effect of handwriting displayed on the liquid crystal handwriting panel 000 can be further improved.
  • FIG. 6 is a schematic diagram of a film layer structure of a first substrate provided in the embodiment of the present application.
  • the first substrate 100 in the liquid crystal handwriting panel 000 may further include: a first insulating layer 104 located between the plurality of touch signal lines Tx and the touch electrode layer 102 .
  • the first insulating layer 104 has a plurality of first via holes V1, and the touch signal line Tx is electrically connected to the corresponding touch electrode block 102a through at least one first via hole V1.
  • FIG. 5 schematically illustrates each touch signal line Tx in the first substrate 100 being electrically connected to the corresponding touch electrode block 102 a through a first via hole V1 .
  • each touch signal line Tx can also be electrically connected to the corresponding touch electrode block 102a through a plurality of first via holes V1, for connecting each touch signal line Tx to the corresponding touch electrode block 102a.
  • the number of the first vias V1 of the touch electrode blocks 102a may be the same. In this way, it can be ensured that the plurality of first via holes V1 that can be arranged in the first insulating layer 104 are evenly arranged, further improving the display effect of handwriting displayed on the liquid crystal handwriting panel 000 .
  • the touch signal line Tx is electrically connected to the corresponding touch electrode block 102a through a plurality of first via holes V1
  • the voltage at each position of the touch electrode block 102 a is relatively uniform, thereby improving the accuracy of the touch electrode layer 102 in positioning the contact area between the external object and the first substrate 100 .
  • the first substrate 100 in the liquid crystal handwriting panel 000 further includes: a second insulating layer 105 located between the first driving electrode layer 103 and the touch electrode layer 102, wherein the touch electrode layer 102 is located opposite to the second A driving electrode layer 103 is close to one side of the first substrate 101 .
  • the position information of the contact area between the external object and the first substrate 100 can be determined through the touch electrode layer 102 .
  • the second insulating layer 105 between the touch electrode layer 102 and the first driving electrode layer 103 when a voltage (pixel voltage or common voltage) is applied to the first driving electrode layer 103, Disturbing the touch electrode layer 102 ensures that the touch electrode layer 102 can work normally.
  • the control component 010 when the liquid crystal handwriting panel 000 is in the erasing mode, the control component 010 needs to apply a pixel voltage to the pixel electrode 400 in the area to be erased.
  • the refresh rate of the liquid crystal handwriting panel 000 is usually low, so the duration of the control component 010 applying the pixel voltage to the pixel electrode 400 is usually longer, so as to ensure that the duration of the voltage difference between the pixel electrode 400 and the common electrode 500 is longer.
  • Erase the handwriting in the area to be erased so that the erasing effect in the area to be erased is better.
  • the duration is generally in the range of 150 milliseconds to 650 milliseconds.
  • the duration is in the range of 200 milliseconds to 600 milliseconds.
  • the period for the control component 010 to sense the touch position through the touch electrode layer 102 is in the range of 2 milliseconds to 40 milliseconds. Preferably, the period is in the range of 5 milliseconds to 20 milliseconds.
  • the first substrate 101 in the first substrate 100 may be a flexible substrate. In this way, it can be ensured that the external pressure can control the bistable liquid crystal molecules to change from the focal conic texture to the planar texture.
  • the first substrate 101 may be a polyethylene terephthalate (English: Polyethylene Terephthalate; PET for short) substrate.
  • the second substrate 201 in the second substrate 200 may be a rigid substrate. In this way, it can be ensured that the overall rigidity of the liquid crystal handwriting panel 000 is better.
  • the second substrate 201 may be a glass substrate.
  • the materials of the touch electrode layer 102, the first driving electrode layer 103 and the second driving electrode layer 202 in the liquid crystal handwriting panel 000 can all include: indium tin oxide (English: Indium Tin Oxide; abbreviation: ITO) or indium zinc oxide ( English: Indium Zinc Oxide; Abbreviation: IZO) and other transparent conductive materials.
  • indium tin oxide English: Indium Tin Oxide; abbreviation: ITO
  • indium zinc oxide English: Indium Zinc Oxide; Abbreviation: IZO
  • other transparent conductive materials can all include: indium tin oxide (English: Indium Tin Oxide; abbreviation: ITO) or indium zinc oxide ( English: Indium Zinc Oxide; Abbreviation: IZO) and other transparent conductive materials.
  • one of the first driving electrode layer 103 in the first substrate 100 and the second driving electrode layer 202 in the second substrate 200 may include a plurality of pixel electrodes 400, the other may include a common electrode 500. Therefore, the embodiment of the present application will take the following two exemplary implementation manners as examples for schematic description:
  • FIG. 7 is a schematic diagram of the film layer structure of another liquid crystal handwriting panel provided by the embodiment of the present application.
  • the first driving electrode layer 103 in the first substrate 100 includes a plurality of pixel electrodes 400
  • the second driving electrode layer 203 in the second substrate 200 includes a common electrode 500 .
  • Figure 8 is a top view of the first substrate in the liquid crystal handwriting panel shown in Figure 7, and Figure 9 is a schematic diagram of the film layer structure at A-A' in Figure 8.
  • the first substrate 100 may further include: a plurality of data lines D and a plurality of thin film transistors T, and the data lines D may be electrically connected to the pixel electrodes 400 through the thin film transistors T.
  • the first substrate 100 may further include: a plurality of gate lines G, and the gate lines G may also be electrically connected to the pixel electrodes 400 through thin film transistors T. Referring to FIG.
  • a plurality of data lines D are arranged in parallel, and a plurality of gate lines G are also arranged in parallel, and the extending direction of the data lines D may be perpendicular to the extending direction of the gate lines G.
  • any two adjacent data lines D and any two adjacent gate lines G can form a pixel area, and a pixel electrode 400 and a thin film transistor T can be distributed in each pixel area.
  • each data line D can be electrically connected with the first electrode of each thin film transistor T in the pixel area of the same column, and the second electrode of the thin film transistor T in each pixel area can be connected with the pixel electrode in this pixel area.
  • each gate line G may be electrically connected to the gates of the thin film transistors T in the same row of pixel regions.
  • the first pole of the thin film transistor T may be one of the source and the drain, and the second pole may be the other of the source and the drain.
  • each thin film transistor T in the embodiments of the present application is schematically illustrated by taking a bottom-gate thin film transistor as an example. In other optional implementation manners, the thin film transistor may also be a top-gate thin film transistor, which is not limited in this embodiment of the present application.
  • the multiple data lines D and the multiple touch signal lines Tx are arranged in the same layer and made of the same material. That is, the data line D and the touch signal line Tx are formed by the same patterning process.
  • the one patterning process here and the one patterning process in the following embodiments all include: photoresist coating, exposure, development, etching and photoresist stripping.
  • the touch signal line Tx can be integrated in the first driving electrode layer 103 without setting additional conductive patterns, which effectively reduces the manufacturing cost of the liquid crystal handwriting panel 000 .
  • a storage capacitor Cst can be formed between the touch electrode layer 102 and the pixel electrode 400 .
  • the storage capacitor Cst can be used to maintain the pixel voltage of the pixel electrode 400 .
  • the auxiliary electrode line which is arranged on the same layer as the gate line G and is used to form a storage capacity with the pixel electrode 400. In this way, the bistable liquid crystal molecules in a plane texture can be guaranteed The ambient light reflected back is not blocked by the auxiliary electrode wire.
  • the liquid crystal handwriting panel 000 further includes: a spacer 600 located between the first substrate 100 and the second substrate 200, and the spacer 600 is connected to the first substrate 100 and the second substrate 200. One of the substrates 200 is fixed.
  • the spacer 600 in the liquid crystal handwriting panel 000 is made of elastic material, which can provide elastic deformation when the liquid crystal handwriting panel 000 is subjected to external pressure, and the spacer 400 can act on the first substrate 100 and the second substrate 200
  • the supporting function avoids the problem that the arrangement of the liquid crystal molecules in the liquid crystal layer 300 is affected when the liquid crystal handwriting panel 000 is pressed, and ensures the display effect of the liquid crystal handwriting panel 000 .
  • FIG. 10 is a top view of the second substrate in the liquid crystal handwriting panel shown in FIG. 7,
  • FIG. 10 is a schematic diagram of the film layer structure at BB' in FIG. 9 .
  • the spacers 600 in the liquid crystal handwriting panel 000 may be formed on the side of the common electrode 500 away from the second substrate 201 .
  • one end of the spacer 600 in the liquid crystal handwriting panel 000 is fixed to the second substrate 200 , and the other end can be in contact with the first substrate 100 . In this way, it can be ensured that the spacer 600 can support the first substrate 100 and the second substrate 200 .
  • Fig. 11 is another example of the first substrate in the liquid crystal handwriting panel shown in Fig. 7
  • Fig. 13 is a schematic view of the film layer structure at CC' in Fig. 12.
  • Spacers in the liquid crystal handwriting panel 000 may be formed on a side of the plurality of pixel electrodes 400 away from the first substrate 101 .
  • one end of the spacer 600 in the liquid crystal handwriting panel 000 is fixed to the first substrate 100, and the other end can be in contact with the second substrate 200. In this way, it can be ensured that the spacer 600 can support the first substrate 100 and the second substrate 200 .
  • the pixel electrodes 400 in the liquid crystal handwriting panel 000 can be arranged corresponding to the spacers 600 .
  • the liquid crystal handwriting panel 000 can set the spacer 600 in the liquid crystal handwriting panel 000 according to the size of the pixel electrode 400 in the liquid crystal handwriting panel 000 and the pressure applied on the liquid crystal handwriting panel 000, so as to ensure that the spacer 600 in the liquid crystal handwriting panel 000 The same pressure can be applied everywhere.
  • three rows and three columns of spacers 600 may be arranged on one pixel electrode 400 , and the same number of spacers 600 may be arranged on each pixel electrode 400 in the liquid crystal handwriting panel 000 . In this way, the plurality of spacers 600 and the plurality of pixel electrodes 400 in the liquid crystal handwriting panel 000 are evenly distributed, which effectively improves the stability of the liquid crystal handwriting panel 000 .
  • the first substrate 101 in the first substrate 100 is a flexible substrate
  • the second substrate 201 in the second substrate 200 is a rigid substrate. Therefore, when the spacer 600 is fixed to the second substrate 200 , the spacer 600 is formed on a rigid substrate instead of a flexible substrate, which can reduce the manufacturing difficulty of the liquid crystal handwriting panel 000 .
  • the control component 010 in the liquid crystal handwriting panel 000 may include: a first driving circuit board 0101 and a control circuit board 0102 .
  • the first driving circuit board 0101 may be electrically connected to the first substrate 100 and the control circuit board 0102 respectively.
  • the first driving circuit board 0101 may be a flexible circuit board or a chip-on-chip with a driving chip.
  • the first driving circuit board 0101 is used to drive the liquid crystal handwriting panel 000 to work
  • the control circuit board 0102 is used to control the first driving circuit board 0101 to work.
  • the control circuit board 0102 can determine the position of the area to be erased according to the touch electrode layer 102 , and apply a pixel voltage to the pixel electrodes in the area to be erased through the first driving circuit board 0101 .
  • the peripheral area of the first substrate 100 has a bonding structure
  • the first driving circuit board 0101 can be electrically connected to the bonding structure of the first substrate 100 through a bonding process.
  • the binding structure can be electrically connected to the data line D, the gate line G and the touch signal line Tx in the first substrate 100 respectively, so that after the first driving circuit board 0101 is electrically connected to the binding structure, the first driving The circuit board 0101 can provide corresponding electrical signals for the data line D, the gate line G and the touch signal line Tx.
  • the common electrode 500 in the second substrate 200 can be electrically connected to the control circuit board 0102 through the conductive glue and the first driving circuit board 0101 .
  • the common electrode 500 can be electrically connected to a reference voltage terminal in the control circuit board 0102, so that the reference voltage terminal can always provide a common voltage to the common electrode 500.
  • the control circuit board 0102 in the liquid crystal handwriting panel 000 can control the first driving circuit board 0101, so that the first driving circuit board 0101 outputs touch signals to a plurality of touch signal lines Tx, and then The control circuit board 0102 may be able to locate the position of the contact area between the external object and the first substrate 100 .
  • the control circuit board 0102 can output gate signals to a plurality of gate lines G through the first drive circuit board 0101, and output gate signals to a plurality of data lines G.
  • D outputs a data signal, so that the pixel voltage can be applied to the pixel electrode 400 in the area to be erased.
  • FIG. 14 is a top view of the first substrate in the liquid crystal handwriting panel shown in FIG. 7 .
  • the peripheral area of the first substrate 100 in the liquid crystal handwriting panel 000 is provided with an array gate drive (English: Gate driver On Array, referred to as: GOA) circuit 010a, and the GOA circuit 010a can be connected with the gate line G and the first drive circuit board respectively. 0101 electrical connections.
  • the first driving circuit board 0101 can be electrically connected to the gate line G through the GOA circuit 010a.
  • the first driving circuit board 0101 may include: a source driving circuit board 010b and a touch driving circuit board 010c.
  • the source driving circuit board 010b can be electrically connected to a plurality of data lines D;
  • the touch driving circuit board 010c can be electrically connected to a plurality of touch signal lines Tx.
  • the above embodiment is schematically illustrated by taking a plurality of data lines D connected to the source driving circuit board 010b and a plurality of touch signal lines Tx connected to the touch driving circuit board 010c as an example.
  • the first driving circuit board 0101 may not be divided into the source driving circuit board 010b and the touch driving circuit board 010c, so that the multiple data lines D and the multiple touch signal lines Tx can be connected with electrically connected to the same circuit board.
  • the number of chips in the liquid crystal handwriting panel 000 is effectively reduced, and the integration degree of the liquid crystal handwriting panel 000 is improved.
  • FIG. 15 is a schematic diagram of the film layer structure of another liquid crystal handwriting panel provided by the embodiment of the present application.
  • the first driving electrode layer 103 in the first substrate 100 includes a common electrode 500
  • the second driving electrode layer 203 in the second substrate 200 includes a plurality of pixel electrodes 400 .
  • Figure 16 is a top view of the first substrate in the liquid crystal handwriting panel shown in Figure 15, and Figure 17 is the film layer structure of the first substrate shown in Figure 16 at DD' schematic diagram.
  • a plurality of touch signal lines Tx in the first substrate 100 can be disposed on the first substrate 100 .
  • Figure 18 is a top view of the second substrate in the liquid crystal handwriting panel shown in Figure 15, and Figure 19 is the film layer structure of the second substrate shown in Figure 18 at EE' schematic diagram.
  • the second substrate 200 may further include: a plurality of data lines D, a plurality of gate lines and a plurality of thin film transistors T.
  • a plurality of data lines D may be further included in the structure of multiple data lines D, multiple gate lines and multiple thin film transistors T.
  • FIG. It should be noted that, for the structure of multiple data lines D, multiple gate lines and multiple thin film transistors T, reference may be made to the corresponding content in the above-mentioned first exemplary implementation manner, and details are not described here in this embodiment of the present application.
  • the extending direction of the data lines D may be the same as the extending direction of the touch signal lines Tx. parallel to, or perpendicular to the extending direction of the touch signal line Tx.
  • the first substrate 101 in the first substrate 100 is a flexible substrate
  • the second substrate 201 in the second substrate 200 is a rigid substrate. Therefore, when the first driving electrode layer 103 includes the common electrode 500 and the second driving electrode layer 203 includes a plurality of pixel electrodes 400, it is only necessary to form the common electrode 500 and the touch electrode layer 102 on the flexible substrate, and the pixel Both the electrode 400 and the thin film transistor T can be formed on a rigid substrate. In this way, there are fewer structures to be formed on the flexible substrate, which can reduce the manufacturing difficulty of the first substrate 100 , and further reduce the manufacturing difficulty of the liquid crystal handwriting panel 000 .
  • the second substrate 200 may further include: an auxiliary signal line L disposed on the same layer as the gate line G.
  • an auxiliary signal line L disposed on the same layer as the gate line G.
  • a storage capacitor Cst may be formed between the auxiliary signal line L and the pixel electrode 400 .
  • the storage capacitor Cst can be used to maintain the pixel voltage of the pixel electrode 400 .
  • the auxiliary signal line L since the auxiliary signal line L is on the second substrate 200 , the auxiliary signal line L does not block the ambient light reflected by the bistable liquid crystal molecules in planar texture.
  • the liquid crystal handwriting panel 000 further includes: a spacer 600 located between the first substrate 100 and the second substrate 200, and the spacer 600 is connected to the first substrate 100 and the second substrate 200.
  • a spacer 600 located between the first substrate 100 and the second substrate 200, and the spacer 600 is connected to the first substrate 100 and the second substrate 200.
  • One of the substrates 200 is fixed. It should be noted that, for the structure and principle of the spacer 600 , reference may be made to the corresponding part in the above-mentioned first exemplary implementation manner, which will not be repeated in this embodiment of the present application.
  • the control assembly 010 in the liquid crystal handwriting panel 000 may further include: a first driving circuit board 0101 , a second driving circuit board 0103 and a control circuit board 0102 .
  • the control circuit board 0102 is electrically connected to the first driving circuit board 0101 and the second driving circuit board 0103 respectively, and the first driving circuit board 0101 can be electrically connected to the first substrate 100, and the second driving circuit board 0103 can be connected to the second substrate 200 electrical connection.
  • both the first driving circuit board 0101 and the second driving circuit board 0103 can be flexible circuit boards or chip-on-chips with driving chips.
  • the first driving circuit board 0101 is used to determine the contact position between the external object and the first substrate through the touch electrode layer 102
  • the second driving circuit board 0102 is used to apply the pixel voltage to the pixel electrode
  • the control circuit board 0103 is used to control the first substrate.
  • a driving circuit board 0101 and a second driving circuit board 0102 work.
  • the control circuit board 0102 can determine the position of the area to be erased through the first driving circuit board 0101 , and apply the pixel voltage to the pixel electrodes in the area to be erased through the second driving circuit board 0102 .
  • the peripheral area of the first substrate 100 has a bonding structure, and the first driving circuit board 0101 can be electrically connected to the bonding structure of the first substrate 100 through a bonding process.
  • the binding structure of the first substrate 100 can be electrically connected with the touch signal line Tx in the first substrate 100, so that after the first driving circuit board 0101 is electrically connected with the binding structure of the first substrate 100, the first The driving circuit board 0101 can provide corresponding electrical signals for the touch signal lines Tx.
  • the peripheral area of the second substrate 200 has a bonding structure, and the second driving circuit board 0103 can be electrically connected to the bonding structure of the second substrate 200 through a bonding process.
  • the binding structure of the second substrate 200 can be electrically connected to the data line D and the gate line G in the second substrate 200 respectively, so that after the second driving circuit board 0103 is electrically connected to the binding structure of the second substrate 200 , the second driving circuit board 0103 can provide corresponding electrical signals for the data line D and the gate line G.
  • the common electrode 500 in the first substrate 100 can be electrically connected to the control circuit board 0102 through the conductive glue and the second driving circuit board 0103 .
  • the common electrode 500 can be electrically connected to a reference voltage terminal in the control circuit board 0102 , so that the reference voltage terminal can always provide a common voltage to the common electrode 500 .
  • Figure 20 is another top view of the first substrate in the liquid crystal handwriting panel shown in Figure 15
  • Figure 21 is the second substrate in the liquid crystal handwriting panel shown in Figure 15
  • the first driving circuit board 0101 in the liquid crystal handwriting panel 000 may include: a touch driving circuit board 010c.
  • the second driving circuit board 0103 in the liquid crystal handwriting panel 000 may include: a source driving circuit board 010b. Wherein, the source driving circuit board 010b can be electrically connected to a plurality of data lines D; the touch driving circuit board 010c can be electrically connected to a plurality of touch signal lines Tx.
  • a GOA circuit 010a is provided in the peripheral area of the first substrate 100 in the liquid crystal handwriting panel 000, and the GOA circuit 010a can be electrically connected to the gate line G and the second driving circuit board 0103 respectively. In this way, the second driving circuit board 0103 can be electrically connected to the gate line G through the GOA circuit 010a.
  • the duration of the second driving circuit board 0103 applying the pixel voltage to the pixel electrode is in the range of 150 milliseconds to 650 milliseconds; the period of the first driving circuit board 0101 sensing the touch position through the touch electrode layer In the range of 2 milliseconds to 40 milliseconds, the signal applied by the second driving circuit board 0103 is not closely combined with the signal applied by the first driving circuit board 0101 . Therefore, there is no need to combine the second driving circuit board 0103 with the first driving circuit board 0101, the second driving circuit board 0103 only needs to be bound with the second substrate 200, and the first driving circuit board 0101 only needs to be bound with the second substrate 200. The first substrate 100 only needs to be bound, which further reduces the manufacturing difficulty of the handwriting device.
  • the liquid crystal handwriting panel provided by the embodiment of the present application includes: a first substrate and a second substrate oppositely arranged, and a liquid crystal layer between them.
  • the first substrate in the liquid crystal handwriting panel has a touch electrode layer.
  • the control component can detect the position of the contact area between the erasing tool and the first substrate through the touch electrode layer, and this position is the position of the area to be erased. After pixel voltage is applied to the pixel electrodes in the erasing area, the handwriting device can realize the erasing function of handwriting.
  • the control component can detect the position of the contact area between the writing tool and the first substrate through the touch electrode layer, and this position is the fixed position of the handwriting.
  • the corresponding image information enables the handwriting device to realize the function of saving handwriting.
  • There is no need to install an infrared positioning device in the liquid crystal handwriting panel only the touch electrode layer integrated in the first substrate can realize the function of saving or erasing handwriting, effectively reducing the overall thickness of the liquid crystal handwriting panel, and the liquid crystal
  • the width of the frame of the handwriting panel makes the screen ratio of the liquid crystal handwriting panel higher.
  • the embodiment of the present application also provides a method for controlling a handwriting device, which is applied to the liquid crystal handwriting panel in the above embodiment.
  • the liquid crystal handwriting panel is the liquid crystal handwriting panel shown in FIG. 4 , FIG. 7 or FIG. 15 .
  • the control method of the handwriting device may include:
  • Step S1 when the liquid crystal handwriting panel is in the erasing mode, determine the position information of the area to be erased through the touch electrode layer;
  • Step S2 based on the location information of the area to be erased, apply a pixel voltage to the pixel electrodes in the area to be erased through the control component, so that a voltage difference is formed between the pixel electrodes in the area to be erased and the common electrode.
  • control method of the handwriting device may also include:
  • the position information of the handwriting is determined through the touch electrode layer, and image information corresponding to the handwriting is generated.
  • control method of the handwriting device may also include:
  • the position information of the contact of the external object with the first substrate is determined as the position information of the handwriting.
  • the external objects in contact with the first substrate are detected through the touch electrode layer to determine the mode of the liquid crystal handwriting panel, including:
  • the area of the contact area between the external object and the first substrate is detected through the touch electrode layer, and/or the capacitance change after the external object contacts the first substrate is detected to determine the mode of the liquid crystal handwriting panel.

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Abstract

本申请公开了一种液晶手写面板、手写装置及其控制方法，属于显示技术领域。液晶手写面板包括：相对设置的第一基板和第二基板，以及控制组件。通过在第一基板中设置触控电极层，可以确定外界物体与第一基板的接触区域的位置。无需在液晶手写面板中设置红外定位装置，仅需要在第一基板内集成的触控电极层便能够让液晶手写面板实现对书写笔迹的保存或擦除功能，有效的降低了液晶手写面板的整体厚度，以及液晶手写面板的边框的宽度，使得液晶手写面板的屏占比较高。

Description

液晶手写面板、手写装置及其控制方法 技术领域
本申请涉及显示技术领域，特别涉及一种液晶手写面板、手写装置及其控制方法。
背景技术
手写板是一种用于实现文字书写和绘画的电子设备。其中，液晶手写面板具有功耗低且笔迹清晰的优势，近年来液晶手写面板的应用越来越广泛。
为了能够对液晶手写面板所显示的书写笔迹进行局部擦除，需要在液晶手写面板中集成红外定位装置。在采用擦除工具(例如，板擦)对液晶手写面板显示的书写笔迹进行擦除时，可以通过红外定位装置确定擦除工具在液晶手写面板上的位置，以在液晶手写面板中确定待擦除区域。之后，液晶手写面板可以对待擦除区域内的像素电极进行控制，以擦除待擦除区域内的书写笔迹。
但是，在液晶手写面板中集成红外定位装置后，会导致液晶手写面板的整体厚度较大。
发明内容
本申请实施例提供了一种液晶手写面板、手写装置及其控制方法。可以解决现有技术中集成红外定位装置的液晶手写面板的整体厚度较大的问题，所述技术方案如下：
一方面，提供了一种液晶手写面板，包括：相对设置的第一基板和第二基板，位于所述第一基板和所述第二基板之间的液晶层；
所述第一基板包括：第一衬底，以及位于所述第一衬底一侧的触控电极层和位于所述第一衬底一侧的第一驱动电极层，所述第一驱动电极层相比于所述触控电极层更靠近所述液晶层；
所述第二基板包括：第二衬底，以及位于所述第二衬底一侧的第二驱动电极层和位于所述第二衬底一侧的遮光层；
其中，所述第一驱动电极层和所述第二驱动电极层中的一个包括多个像素电极，另一个包括公共电极。
可选的，所述触控电极层包括：多个触控电极块，所述触控电极块在所述第一衬底上的正投影，与至少一个所述像素电极在所述第一衬底上的正投影存在交叠区域；
所述第一基板还包括：多条触控信号线，所述多条触控信号线与所述多个触控电极块一一对应电连接。
可选的，当所述第一驱动电极层包括所述多个像素电极时，所述第一基板还包括：多条数据线和多个薄膜晶体管，所述数据线通过所述薄膜晶体管与所述像素电极电连接；
其中，所述多条数据线和所述多条触控信号线同层设置，且材料相同。
可选的，所述第一基板还包括：位于所述多条触控信号线与所述触控电极层之间的第一绝缘层，所述第一绝缘层具有多个第一过孔，所述触控信号线通过至少一个所述第一过孔与对应的触控电极块电连接。。
可选的，所述第一基板还包括：位于所述第一驱动电极层与所述触控电极层之间的第二绝缘层，所述触控电极层相对于所述第一驱动电极层靠近所述第一衬底。
可选的，所述液晶手写面板还包括：位于所述第一基板和所述第二基板之间的隔垫物，所述隔垫物与所述第一基板和所述第二基板中的一个固定。
可选的，所述第一衬底为柔性衬底，所述触控电极层和所述第一驱动电极层均位于所述柔性衬底靠近所述第二基板的一侧。
可选的，所述第一衬底为柔性衬底，所述触控电极层和所述第一驱动电极层均位于所述柔性衬底靠近所述第二基板的一侧；
所述第二衬底为刚性衬底，所述第一驱动电极层包括所述公共电极，所述第二驱动电极层包括所述多个像素电极。
另一方面，提供了一种手写装置，包括上述任一所述的液晶手写面板，以及与所述液晶手写面板电连接的控制组件；
所述控制组件被配置为：在所述液晶手写面板处于擦除模式时，通过所述触控电极层确定待擦除区域的位置信息，并向所述待擦除区域内的像素电极施加像素电压，以使所述待擦除区域内的像素电极与所述公共电极之间形成电压 差。
可选的，所述控制组件还被配置为：在所述液晶手写面板处于书写模式时，通过所述触控电极层确定书写笔迹的位置信息，并生成与所述书写笔迹对应的图像信息。
可选的，所述控制组件向所述像素电极施加所述像素电压的持续时长在150毫秒至650毫秒的范围内；
所述控制组件通过所述触控电极层感测触控位置的周期在2毫秒至40毫秒的范围内。
又一方面，提供了一种手写装置的控制方法，应用于上述所述的手写装置，所述方法包括：
在所述液晶手写面板处于擦除模式时，通过所述触控电极层确定待擦除区域的位置信息；
基于所述待擦除区域的位置信息，通过所述控制组件向所述待擦除区域内的像素电极施加像素电压，以使所述待擦除区域内的像素电极与所述公共电极之间形成电压差。
可选的，所述方法还包括：
在所述液晶手写面板处于书写模式时，通过所述触控电极层确定书写笔迹的位置信息，并生成与所述书写笔迹对应的图像信息。
可选的，所述方法还包括：
通过所述触控电极层对与所述第一基板接触的外界物体进行检测，确定所述液晶手写面板所处模式；
在确定出所述液晶手写面板处于所述擦除模式后，将所述外界物体与所述第一基板接触的位置信息确定为所述待擦除的区域的位置信息；
在确定出所述液晶手写面板处于所述书写模式后，将所述外界物体与所述第一基板接触的位置信息确定为所述书写笔迹的位置信息。
可选的，通过所述触控电极层对与所述第一基板接触的外界物体进行检测，确定所述液晶手写面板所处模式，包括：
通过所述触控电极层检测外界物体与所述第一基板的接触区域的面积，和/或，检测外界物体与所述第一基板接触后的电容变化量，确定所述液晶手写面板所处模式。
本申请实施例提供的技术方案带来的有益效果至少包括：
一种液晶手写面板，包括：相对设置的第一基板和第二基板，以及位于二者之间的液晶层。液晶手写面板中的第一基板具有触控电极层。通过在第一基板中设置触控电极层，可以确定外界物体与第一基板的接触区域的位置。例如，在液晶手写面板处于擦除模式时，控制组件可以通过触控电极层检测擦除工具与第一基板的接触区域的位置，该位置即为待擦除区域的位置，在控制组件对待擦除区域内的像素电极施加像素电压后，便能够让手写装置实现书写笔迹的擦除功能。又例如，在液晶手写面板处于书写模式时，控制组件可以通过触控电极层检测书写工具与第一基板的接触区域的位置，该位置即为书写笔迹定位置，在控制组件生成与该书写笔迹对应的图像信息，便能够让手写装置实现对书写笔迹的保存功能。无需在液晶手写面板中设置红外定位装置，仅需要在第一基板内集成的触控电极层变能够实现对书写笔迹的保存或擦除功能，有效的降低了液晶手写面板的整体厚度，以及液晶手写面板的边框的宽度，使得液晶手写面板的屏占比较高。
附图说明
为了更清楚地说明本申请实施例中的技术方案，下面将对实施例描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本申请的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。
图1是相关技术提供的一种液晶手写面板的截面图；
图2是图1示出的液晶手写面板中液晶面板的膜层结构示意图；
图3是本申请实施例提供的一种液晶手写面板的结构示意图；
图4是本申请实施例提供的一种手写装置的结构示意图；
图5是本申请实施提供的另一种液晶手写面板的俯视图；
图6是本申请实施例提供的一种第一基板的膜层结构示意图；
图7是本申请实施例提供的又一种液晶手写面板的膜层结构示意图；
图8是图7示出的液晶手写面板中的第一基板的俯视图；
图9是图8在A-A’处的膜层结构示意图；
图10是图7示出的液晶手写面板中的第二基板的俯视图；
图11是图10在B-B’处的膜层结构示意图；
图12是图7示出的液晶手写面板中的第一基板的又一种俯视图；
图13是图12在C-C’处的膜层结构示意图；
图14是图7示出的液晶手写面板的俯视图；
图15是本申请实施例提供的再一种液晶手写面板的膜层结构示意图；
图16是图15示出的液晶手写面板中的第一基板的俯视图；
图17是图16示出的第一基板在D-D’处的膜层结构示意图；
图18是图15示出的液晶手写面板中的第二基板的俯视图；
图19是图18示出的第二基板在E-E’处的膜层结构示意图；
图20是图15示出的液晶手写面板中的第一基板的另一种俯视图；
图21是图15示出的液晶手写面板中的第二基板的另一种俯视图。
具体实施方式
为使本申请的目的、技术方案和优点更加清楚，下面将结合附图对本申请实施方式作进一步地详细描述。
在相关技术中，请参考图1和图2，图1是相关技术提供的一种液晶手写面板的截面图，图2是图1示出的液晶手写面板中液晶面板的膜层结构示意图。液晶手写面板00通常可以包括：液晶面板01和红外定位装置02。
其中，液晶面板01可以包括：相对设置的第一基板011和第二基板012，以及位于二者之间的液晶层013。第一基板011通常具有阵列排布的多个像素电极0111和遮光层0112(例如为黑色涂料层或者黑色铝蜂窝板)，该多个像素电极0111相对于遮光层0112更靠近第二基板012。第二基板012具有面状的公共电极0121。液晶层013中的液晶分子可以为双稳态液晶分子。
液晶手写面板00中的红外定位装置02可以包括：固定架021、红外发射单元022和红外接收单元023。其中，固定架021用于固定红外发射单元022和红外接收单元023，该固定架021一般位于液晶面板01外围一圈，并且高于液晶面板01的显示面。例如，固定架021的端面与液晶面板01的显示面之间存在高度差h。红外发射单元022可以向红外接收单元023发射红外光线，通过红外接收单元023接收的红外光线可以确定出液晶面板01上的外界物体(例如，书写工具或擦除工具)的位置。
当液晶手写面板00处于书写模式时，书写工具(例如，书写笔)可以向液晶面板01施加压力，使得液晶面板01中的液晶层013内的部分液晶分子受外部压力的作用由焦锥织构转变为平面织构。这样，转变为平面织构的液晶分子能够对射入的环境光线中的一定波长的光线(例如，绿色光线)进行反射，使得液晶手写面板可以显示书写笔迹。并且，在书写工具书写的过程中，可以通过红外定位装置02确定出书写工具的移动轨迹，以保证液晶手写面板能够基于该移动轨迹生成与书写笔迹对应的图像信息。后续，液晶手写面板可以将该图像信息发送到其他的显示设备(例如，电脑或手机)，以使其他的显示设备也能够显示出液晶手写面板上的书写笔迹。
当液晶手写面板00处于擦除模式时，擦除工具(例如，板擦)在液晶手写面板00上进行移动，液晶手写面板00通过红外定位装置02发出的红外光，确定擦除工具在液晶面板01上的位置，进而可以在液晶手写面板00中确定待擦除区域。之后，液晶手写面板可以向待擦除区域内的像素电极施加电压，以使待擦除区域内的像素电极与公共电极之间能够形成电压差，进而使得待擦除区域内的液晶分子在该电压差的作用下重新排列，也即液晶分子可以由平面织构转变为焦锥织构。这样，转变为焦锥织构的液晶分子能够对射入的环境光线进行透射，使得待擦除区域可以呈现出与遮光层0112颜色相同的背景，进而实现对待擦除区域内的书写笔迹进行擦除。
然而，为了保证红色定位装置02能够准确的检测出与液晶面板01接触的外界物体(例如，书写工具或擦除工具)，需要保证固定架021的端面与液晶面板01的显示面之间的高度差h较大，才能够让红色定位装置02中的红外发射单元022发出的红外光线，能够被红外接收单元023接收。这样，会导致液晶手写面板00的整体厚度较厚。
并且，由于红外发射单元022和红外接收单元023均需要被固定架021固定，且固定架021位于液晶面板01外围一圈。因此，液晶手写面板00的边框W1和W2通常较大，导致液晶手写面板00的屏占比较低。
请参考图3，图3是本申请实施例提供的一种液晶手写面板的结构示意图。该液晶手写面板000可以包括：相对设置的第一基板100和第二基板200，以及位于第一基板100和第二基板200之间的液晶层300。
液晶手写面板000中的第一基板100可以包括：第一衬底101，以及位于第一衬底101一侧的触控电极层102和位移第一衬底101的第一驱动电极层103。示例的，触控电极层102和第一驱动电极层103可以均位于第一衬底101靠近第二基板200的一侧。其中，第一驱动电极层103相对于触控电极层102更靠近液晶层300。
液晶手写面板000中的第二基板200可以包括：第二衬底201，以及位于第二衬底201一侧的第二驱动电极层202和位于第二衬底201一侧的遮光层203。其中，遮光层203一般为黑色的膜层，保证透光第一基板100和的第二基板200的光线能够全部被遮光层203吸收，使得液晶手写面板整体可以呈现出黑色背景。示例的，第二驱动电极层202可以位于第二衬底201靠近第一基板100的一侧，遮光层203可以位于第二衬底201远离第一基板100的一侧，遮光层203也可以位于第二衬底靠近第一基板100的一侧。需要说明的是，当第二驱动电极层202和遮光层203均位于第二衬底201靠近第一基板100的一侧时，第二驱动电极层202相对于遮光层203更靠近液晶层300，且第二驱动电极层202与遮光层203之间存在绝缘层，以对第二驱动电极层202与遮光层203进行绝缘，防止具有导电性的遮光层203影响第二驱动电极层202上加载的电信号。
在本申实施例中，第一驱动电极层103和第二驱动电极层202中的一个包括多个像素电极400(图3中未标注，在后续的附图中进行了标记)，另一个包括公共电极500(图3中未标注，在后续的附图中进行了标记)。也即是，当第一驱动电极层103为多个像素电极400时，第二驱动电极层202为公共电极500；当第一驱动电极层103为公共电极500时，第二驱动电极层202为多个像素电极400。其中，多个像素电极400均呈块状，且多个像素电极400可以阵列排布在液晶手写面板000内，公共电极500可以为面状的电极。
液晶手写面板000中的液晶层300可以为双稳态液晶分子层，也即是，该液晶层300内的液晶分子为双稳态液晶分子。
在本申请中，当图3示出的液晶手写面板集成在手写装置内时，请参考图4，图4是本申请实施例提供的一种手写装置的结构示意图，该手写装置001可以包括：液晶手写面板000和控制组件010。其中，液晶手写面板000可以为图3示出的液晶手写面板，控制组件010可以与液晶手写面板000电连接。
例如，若第一基板100中的第一驱动电极层103包括多个像素电极400，第 二基板200中的第二驱动电极层202包括包括公共电极500，则，手写装置001中的控制组件010与第一基板100电连接。在这种情况下，控制组件010可以与第一基板100中的触控电极层102和多个像素电极400电连接。
又例如，若第一基板100中的第一驱动电极层103包括公共电极500，第二基板200中的第二驱动电极层202包括包括多个像素电极400，则，手写装置001中的控制组件010分别与第一基板100和第二基板200电连接。在这种情况下，控制组件010可以与第一基板100中的触控电极层102和公共电极500以及第二基板200中的多个像素电极400电连接。
如此，控制组件010可以被配置为：在液晶手写面板000处于擦除模式时，通过触控电极层102确定待擦除区域的位置信息，并向待擦除区域内的像素电极400施加像素电压，以使待擦除区域内的像素电极400与公共电极500之间形成电压差。
在本申请实施例中，控制组件010还可以被配置为：在液晶手写面板000处于书写模式时，通过触控电极层102可以确定书写笔迹的位置信息，并生成与书写笔迹对应的图像信息。
需要说明的是，在外界物体(书写工具或擦除工具)与液晶手写面板000中的第一基板100接触后，外界物体与第一基板100的接触区域内的电容值会发生变化，通过第一基板100内的触控电极层102能够感测到该电容值发生变化的区域，进而能够确定出外界物体与第一基板100的接触区域的位置。
在这种情况下，在液晶手写面板000处于书写模式时，若书写工具(例如，书写笔或手指)与液晶手写面板000中的第一基板100接触，且向该第一基板100施加一定压力后，则，液晶手写面板000中的液晶层300内的部分双稳态液晶分子受外部压力的作用由焦锥织构转变为平面织构。如此，呈平面织构的双稳态液晶分子能够反射照射在液晶手写面板000上的环境光线中的一定波长的光线(例如，绿色光线)进行反射，以使液晶手写面板000可以显示相应的书写笔迹。并且，在书写工具的书写过程中，控制组件010可以通过触控电极层102确定书写工具与第一基板100接触的位置信息，以确定书写笔迹的位置信息，并生成与该书写笔迹对应的图像信息。从而可以让手写装置可以实现对书写笔迹的保存功能。后续，控制组件010可以将该图像信息发送到其他的显示设备(例如，电脑或手机)，以使其他的显示设备也能够显示出液晶手写面板000 上的书写笔迹。
在液晶手写面板000处于擦除模式时，若擦除工具(例如，板擦或手掌)与液晶手写面板000中的第一基板100接触，则第一基板100与擦除工具的接触区域内的电容值会发生变化。其中，擦除工具与第一基板100的接触区域即为待擦除区域。这样，控制组件010可以通过触控电极层102确定出该待擦除区域的位置信息。之后，控制组件010可以根据待擦除区域的位置信息，向待擦除区域内的像素电极400施加电压，以使待擦除区域内的像素电极400与公共电极500之间能够形成电压差。液晶手写面板000中待擦除区域内的液晶层分子在该电压差的作用下重新排列，也即液晶分子可以由平面织构转变为焦锥织构。这样，转变为焦锥织构的液晶分子能够对射入的环境光线进行透射，使得待擦除区域可以呈现出与遮光层203颜色相同的黑色背景。从而可以实现手写装置对局部区域内的书写笔迹的擦除功能。
在本申请实施例中，通过第一基板100内设置的触控电极层102便能够实现确定外界物体(擦除工具或书写工具)与第一基板100的接触区域的位置，使得手写装置可以实现对书写笔迹的保存或擦除功能。无需在液晶手写面板000中设置红外定位装置，有效的降低了液晶手写面板000的整体厚度，并且提高了液晶手写面板000的屏占比。
综上所述，本申请实施例提供的液晶手写面板，包括：相对设置的第一基板和第二基板，以及位于二者之间的液晶层。液晶手写面板中的第一基板具有触控电极层。通过在第一基板中设置触控电极层，可以确定外界物体与第一基板的接触区域的位置。例如，在液晶手写面板处于擦除模式时，控制组件可以通过触控电极层检测擦除工具与第一基板的接触区域的位置，该位置即为待擦除区域的位置，在控制组件对待擦除区域内的像素电极施加像素电压后，便能够让手写装置实现书写笔迹的擦除功能。又例如，在液晶手写面板处于书写模式时，控制组件可以通过触控电极层检测书写工具与第一基板的接触区域的位置，该位置即为书写笔迹定位置，在控制组件生成与该书写笔迹对应的图像信息，便能够让手写装置实现对书写笔迹的保存功能。无需在液晶手写面板中设置红外定位装置，仅需要在第一基板内集成的触控电极层变能够实现对书写笔迹的保存或擦除功能，有效的降低了液晶手写面板的整体厚度，以及液晶手写面板的边框的宽度，使得液晶手写面板的屏占比较高。
在本申请实施例中，控制组件010可以通过触控电极层102对与第一基板100接触的外界物体进行检测，确定所述液晶手写面板000所处模式。示例的，在控制组件010确定出液晶手写面板000处于擦除模式后，将外界物体与第一基板100接触的位置信息确定为待擦除的区域的位置信息；在控制组件010确定出液晶手写面板000处于书写模式后，将外界物体与第一基板100接触的位置信息确定为书写笔迹的位置信息。
其中，控制组件010通过触控电极层102对与第一基板100接触的外界物体进行检测，确定液晶手写面板000所处模式，有多种可选的实现方式，本申请实施例以以下三种可选的实现方式为例进行示意性的说明：
在第一种可选的实现方式中，在外界物体与第一基板100的接触后，第一基板100中与外界物体接触的区域内的电容值会发生变化，并且通过触控电极层102可以感测到该电容值发生变化的区域的面积大小，进而得到外界物体与第一基板100的接触区域的面积。这样，控制组件010可以通过触控电极层102检测外界物体与第一基板100的接触区域的面积的大小，以对书写模式和擦除模式进行区分。示例的，当外界物体与第一基板100的接触区域的面积较大时，控制组件010可以确定出液晶手写面板000处于擦除模式，如此，外界物体被认为是擦除工具。当外界物体与第一基板100的接触区域的面积较小时，控制组件010可以确定出液晶手写面板000处于书写模式，如此，外界物体被认为是书写工具。
在第二种可选的实现方式中，在不同材质的外界物体与第一基板100的接触后，第一基板100中与不同材质的外界物体接触的区域内的电容值的变化量不同，并且通过触控电极层102可以感测到该电容值的变化量，进而可以得到是哪种材质的外界物体与第一基板100发生了接触。这样，书写工具和擦除工具可以采用不同的材质进行制备，控制组件010可以通过触控电极层102检测外界物体与第一基板100的接触后的电容变化量，以对书写模式和擦除模式进行区分。示例的，当外界物体与第一基板100的接触后产生的电容变化量，位于擦除工具与第一基板100的接触后产生的电容变化量的范围内时，控制组件010可以确定出液晶手写面板000处于擦除模式；当外界物体与第一基板100的接触后产生的电容变化量，位于书写工具与第一基板100的接触后产生的电容变化量的范围内时，控制组件010可以确定出液晶手写面板000处于书写模式。
在第三种可选的实现方式中，在外界物体与第一基板100的接触后，手写装置001可以通过触控电极层200同时检测外界物体与第一基板100的接触区域的面积和外界物体与第一基板100的接触后的电容变化量，来确定液晶手写面板000所处的模式。
示例的，在外界物体与第一基板100的接触后，电容变化量与接触面积的比值，位于与擦除工具对应的阈值范围内时，控制组件010可以确定出液晶手写面板000处于擦除模式；在外界物体与第一基板100的接触后，电容变化量与接触面积的比值，位于与书写工具对应的阈值范围内时，控制组件010可以确定出液晶手写面板000处于书写模式。
在其他的可能的实现方式中，手写装置还可以通过与擦除工具(例如板擦)进行交互(例如，板擦指示液晶手写面板进入擦除模式或书写模式)，确定液晶手写面板000所处模式。手写装置也可以通过外部指令确定液晶手写面板000所处模式。
在本申请实施例中，请参考图5，图5是本申请实施提供的另一种液晶手写面板的俯视图。液晶手写面板000中的触控电极层102可以包括：多个触控电极块102a。触控电极层102中的触控电极块102a在第一衬底101上的正投影，与至少一个像素电极400在第一衬底101上的正投影存在交叠区域。例如，每个触控电极块102a可以与至少一个像素电极400对应，每个像素电极400在第一衬底101上的正投影，位于对应的触控电极块102a在第一衬底101上的正投影内。
在本申请实施例中，每个触控电极块102a所对应的像素电极400的个数可以相同，保证液晶手写面板000在对书写笔迹进行擦除的效果。可选地，像素电极400的个数可以为触控电极层102中的触控电极块102a的个数的整数倍。
示例的，在图5中，每个触控电极块102a可以与四个像素电极400对应，且这四个像素电极400排布为两行和两列。在这种情况下，与每个触控电极块102a对应的四个像素电极400所在区域能够组成一个最小的擦除区域。在与这四个像素电极400所对应的触控电极块102a感测到电容变化后，能够对这四个像素电极400所在区域组成的最小的擦除区域所显示的书写笔迹进行擦除。这样，在该液晶手写面板000内，最小触控单元的大小(也即单个触控电极块102a的大小)与最小擦除区域的大小是相同的，通过调控单个触控电极块102a的大 小，可以对最小擦除区域的大小进行调控。
在本申请实施例中，如图5所示，液晶手写面板000中的第一基板100还可以包括：多条触控信号线Tx。其中，多条触控信号线Tx可以与多个触控电极块102a一一对应电连接。
示例的，液晶手写面板000中的各条触控信号线Tx均可以与控制组件010电连接，控制组件010可以通过向多条触控信号线Tx同时施加触控信号。在外界物体与液晶手写面板000中的第一基板100接触后，外界物体与第一基板100的接触区域内的触控电极块102a之间的电容值会发生变化，使得与接触区域内触控电极块102a连接的触控信号线Tx上加载的触控信号会发生变化，控制组件可以通过感测触控信号发生变化的触控信号线Tx，来实现对外界物体与第一基板100的接触区域的位置进行定位。
示例的，像素电极400在第一衬底101上的正投影与触控信号线Tx在第一衬底101上的正投影不重合，保证触控信号线Tx上加载的触控信号不会对像素电极400上加载的像素电压进行干扰，并且还可以保证从像素电极400所在区域内的呈平面织构的双稳态液晶分子反射的环境光线不会被触控信号线Tx进行遮挡，使得液晶手写面板000所呈现的书写笔迹的显示效果较好。在本申请中，液晶手写面板000中的多个像素电极400可以阵列排布，两列相邻的像素电极400之间可以排布有至少一条触控信号线Tx。
可选的，触控信号线Tx在第一衬底101上的正投影是均匀或规则分布的。例如，每两列像素电极400之间排布的触控信号线Tx的条数相同，或者相邻触控信号线Tx之间包括相同列数的像素电极400。这样，可以保证触控信号线Tx在第一基板100内是均匀或大致均匀分布的，可以进一步的提高液晶手写面板000所呈现的书写笔迹的显示效果。
在本申请实施例中，请参考图5和图6，图6是本申请实施例提供的一种第一基板的膜层结构示意图。液晶手写面板000中的第一基板100还可以包括：位于多条触控信号线Tx与触控电极层102之间的第一绝缘层104。其中，第一绝缘层104具有多个第一过孔V1，触控信号线Tx通过至少一个第一过孔V1与对应的触控电极块102a电连接。
示例的，图5是以第一基板100中的每条触控信号线Tx通过一个第一过孔V1与对应的触控电极块102a电连接为例进行示意性说明的。
在其他的可能的实现方式中，每条触控信号线Tx还可以通过多个第一过孔V1与对应的触控电极块102a电连接，用于连接各条触控信号线Tx与对应的触控电极块102a的第一过孔V1的个数可以相同。如此，可以保证第一绝缘层104中可以排布的多个第一过孔V1是均匀排布的，进一步的提高液晶手写面板000所呈现的书写笔迹的显示效果。
并且，当触控信号线Tx通过多个第一过孔V1与对应的触控电极块102a电连接时，可以保证触控信号线Tx在向对应的触控电极块102a施加触控信号后，触控电极块102a各个位置处的电压较为均匀，进而可以提高触控电极层102对外界物体与第一基板100的接触区域进行定位的精度。
可选的，液晶手写面板000中的第一基板100还包括：位于第一驱动电极层103与触控电极层102之间的第二绝缘层105，其中，触控电极层102位于相对于第一驱动电极层103靠近第一衬底101的一侧。在这种情况下，通过触控电极层102能够确定出外界物体与第一基板100的接触区域的位置信息。在本申请实施例中，通过触控电极层102与第一驱动电极层103之间的第二绝缘层105，可以避免当第一驱动电极层103上施加电压(像素电压或公共电压)时，对触控电极层102进行干扰，保证了触控电极层102能够正常工作。
在本申请实施例中，在液晶手写面板000处于擦除模式时，控制组件010需要向待擦除区域内的像素电极400施加像素电压。液晶手写面板000刷新率通常较低，这样，控制组件010向像素电极400施加像素电压的持续时长通常较长，保证像素电极400与公共电极500之间形成电压差的持续时长较长，进而可以将待擦除区域内的书写笔迹擦除干净，使得对待擦除区域的擦除效果较好。示例的，该持续时长一般在150毫秒至650毫秒的范围内。优选的，该持续时长在200毫秒至600毫秒的范围内。
可选的，控制组件010通过触控电极层102感测触控位置的周期在2毫秒至40毫秒的范围内。优选的，该周期在5毫秒至20毫秒的范围内。
在本申请实施例中，第一基板100中的第一衬底101可以为柔性衬底。这样，可以保证外界施加的压力能够控制双稳态液晶分子由焦锥织构转变为平面织构。例如，该第一衬底101可以为聚对苯二甲酸乙二醇酯(英文：Polyethylene Terephthalate；简称：PET)基底。
第二基板200中的第二衬底201可以为刚性衬底。这样，可以保证液晶手 写面板000的整体刚性较好。例如，该第二衬底201可以为玻璃基底。
液晶手写面板000中的触控电极层102、第一驱动电极层103和第二驱动电极层202的材料均可以包括：氧化铟锡(英文：Indium Tin Oxide；简称：ITO)或氧化铟锌(英文：Indium Zinc Oxide；简称：IZO)等透明导电材料。
在本申请实施例中，由于第一基板100中的第一驱动电极层103和第二基板200中的第二驱动电极层202中的一个可以包括多个像素电极400，另一个可以包括公共电极500。因此，本申请实施例将以以下两种示例性的实现方式为例进行示意性的说明：
第一种示例性的实现方式，请参考图7，图7是本申请实施例提供的又一种液晶手写面板的膜层结构示意图。第一基板100中的第一驱动电极层103包括多个像素电极400，第二基板200中的第二驱动电极层203包括公共电极500。
请参考图8和图9，图8是图7示出的液晶手写面板中的第一基板的俯视图，图9是图8在A-A’处的膜层结构示意图。第一基板100还可以包括：多条数据线D和多个薄膜晶体管T，数据线D可以通过薄膜晶体管T与像素电极400电连接。在本申请中，第一基板100还可以包括：多条栅线G，栅线G也可以通过薄膜晶体管T与像素电极400电连接。
示例的，多条数据线D是平行排布的，多条栅线G也是平行排布的，且数据线D的延伸方向可以与栅线G的延伸方向垂直。这样，任意两条相邻的数据线D和任意两条相邻的栅线G可以围成一个像素区域，每个像素区域内可以分布有一个像素电极400和一个薄膜晶体管T。
其中，每条数据线D可以与同一列像素区域内的各个薄膜晶体管T中的第一极电连接，每个像素区域内的薄膜晶体管T中的第二极可以与这个像素区域内的像素电极400电连接，每条栅线G可以与同一行像素区域内的各个薄膜晶体管T中的栅极电连接。需要说明的是，薄膜晶体管T中的第一极可以为源极和漏极中的一个，第二极可以为源极和漏极中的另一个。还需要说明的是，本申请实施例中的各个薄膜晶体管T均是以底栅型薄膜晶体管为例进行示意性说明的。在其他的可选的实现方式中，该薄膜晶体管还可以为顶栅型薄膜晶体管，本申请实施例对此不作限定。
在本申请实施例中，多条数据线D和多条触控信号线Tx同层设置，且材料相同。也即是，数据线D与触控信号线Tx是采用同一次构图工艺形成的。需要 说明的是，这里的一次构图工艺，以及下述实施例中的一次构图工艺均包括：光刻胶涂覆、曝光、显影、刻蚀和光刻胶剥离。如此，无需设置额外的导电图案便能够将触控信号线Tx集成在第一驱动电极层103中，有效的降低了液晶手写面板000的制造成本。
在本申请中，由于触控电极层102与像素电极400之间存在第二绝缘层105，因此，触控电极层102与像素电极400之间可以构成的存储电容Cst。该存储电容Cst可以用于保持像素电极400的像素电压。此外，本申请中的第一基板100内无需设置与栅线G同层设置且用于与像素电极400形成存电容的辅助电极线，这样，可以保证被呈平面织构的双稳态液晶分子反射回的环境光线不会被辅助电极线遮挡。
在本申请实施例中，如图7所示，液晶手写面板000还包括：位于第一基板100和第二基板200之间的隔垫物600，隔垫物600与第一基板100和第二基板200中的一个固定。液晶手写面板000中的隔垫物600由弹性材料制成，可以使液晶手写面板000受外部压力时，提供弹性形变，且该隔垫物400可以对第一基板100和第二基板200起到支撑作用，避免出现在按压液晶手写面板000时，液晶层300中的液晶分子的排列方式受到影响的问题，保证了液晶手写面板000的显示效果。
需要说明的是，由于液晶手写面板000中的隔垫物可以与第一基板100固定，也可以与第二基板200固定。因此，本申请实施将以以下两种情况为例进行示意性的说明：
第一种情况，当液晶手写面板000中的隔垫物与第二基板200固定时，请参考图10和图11，图10是图7示出的液晶手写面板中的第二基板的俯视图，图10是图9在B-B’处的膜层结构示意图。液晶手写面板000中的隔垫物600可以在公共电极500远离第二衬底201的一侧形成。这里，液晶手写面板000中的隔垫物600的一端与第二基板200固定，另一端可以与第一基板100接触。如此，可以保证隔垫物600能够对第一基板100和第二基板200起到支撑作用。
第二种情况，当液晶手写面板000中的隔垫物与第一基板100固定时，请参考图12和图13，图11是图7示出的液晶手写面板中的第一基板的另一种俯视图，图13是图12在C-C’处的膜层结构示意图。液晶手写面板000中的隔垫物可以在多个像素电极400远离第一衬底101的一侧形成。这里，液晶手写面 板000中的隔垫物600的一端与第一基板100固定，另一端可以与第二基板200接触。如此，可以保证隔垫物600能够对第一基板100和第二基板200起到支撑作用。
在上述两种情况中，液晶手写面板000中的像素电极400可以与隔垫物600对应设置。一般液晶手写面板000可以根据液晶手写面板000中像素电极400的大小以及液晶手写面板000上施加压力的大小，对液晶手写面板000中的隔垫物600进行设置，以保证液晶手写面板000中的各处上可以施加的压力相同。示例的，一个像素电极400上可以设置三行三列排布的隔垫物600，且液晶手写面板000中的每个像素电极400上排布相同数量。如此，液晶手写面板000中具有的多个隔垫物600与多个像素电极400均是均匀分布的，有效提高了液晶手写面板000的稳定性。
需要说明的是，由于第一基板100中的第一衬底101是柔性衬底，第二基板200中的第二衬底201是刚性衬底。因此，当隔垫物600与第二基板200固定时，隔垫物600是在刚性衬底上形成的，并非在柔性衬底上形成，可以降低液晶手写面板000的制造难度。
可选的，如图7所示，液晶手写面板000中的控制组件010可以包括：第一驱动电路板0101和控制电路板0102。第一驱动电路板0101可以分别与第一基板100和控制电路板0102电连接。其中，第一驱动电路板0101可以为柔性电路板或者带有驱动芯片的覆晶薄膜。这里，第一驱动电路板0101用于驱动液晶手写面板000进行工作，控制电路板0102用于控制第一驱动电路板0101进行工作。例如，控制电路板0102可以根据触控电极层102确定出待擦除区域的位置，并通过第一驱动电路板0101向待擦除区域内的像素电极施加像素电压。
示例的，第一基板100的外围区域具有绑定结构，第一驱动电路板0101可以通过绑定工艺与第一基板100的绑定结构电连接。其中，绑定结构可以分别与第一基板100内的数据线D、栅线G和触控信号线Tx电连接，这样，在第一驱动电路板0101与绑定结构电连接后，第一驱动电路板0101能够为数据线D、栅线G和触控信号线Tx提供相应的电信号。
需要说明的是，在第一基板100与第二基板200对盒后，需要在第一基板100与第二基板200之间涂覆导电胶。这样，第二基板200中的公共电极500可以通过导电胶和第一驱动电路板0101与控制电路板0102电连接。例如，公共 电极500可以与控制电路板0102中的参考电压端电连接，使得该参考电压端可以始终向公共电极500提供公共电压。
在本申请实施例中，液晶手写面板000中的控制电路板0102可以对第一驱动电路板0101进行控制，以让第一驱动电路板0101向多条触控信号线Tx输出触控信号，进而可以让控制电路板0102能够实现对外界物体与第一基板100的接触区域的位置进行定位。在控制电路板0102确定出该接触区域的位置为待擦除区域的位置后，控制电路板0102可以通过第一驱动电路板0101向多条栅线G输出栅极信号，并向多条数据线D输出数据信号，使得待擦除区域内的像素电极400上能够加载像素电压。
可选的，如图14所示，图14是图7示出的液晶手写面板中第一基板的俯视图。液晶手写面板000中的第一基板100的外围区域内设置有阵列栅极驱动(英文：Gate driver On Array，简称：GOA)电路010a，GOA电路010a可以分别与栅线G和第一驱动电路板0101电连接。这样，第一驱动电路板0101可以通过GOA电路010a与栅线G电连接。
第一驱动电路板0101可以包括：源极驱动电路板010b和触控驱动电路板010c。其中，源极驱动电路板010b可以与多条数据线D电连接；触控驱动电路板010c可以与多条触控信号线Tx电连接。
需要说明的是，上述实施例是以多条数据线D与源极驱动电路板010b连接，多条触控信号线Tx与触控驱动电路板010c连接为例进行示意性说明的。在其他的可选实现方式中，第一驱动电路板0101可以不划分为源极驱动电路板010b和触控驱动电路板010c，这样，多条数据线D和多条触控信号线Tx可以与同一个电路板电连接。有效的减小了液晶手写面板000中的芯片的个数，提高了液晶手写面板000的集成度。
第二种示例性的实现方式，请参考图15，图15是本申请实施例提供的再一种液晶手写面板的膜层结构示意图。第一基板100中的第一驱动电极层103包括公共电极500，第二基板200中的第二驱动电极层203包括多个像素电极400。
请参考图16和图17所示，图16是图15示出的液晶手写面板中的第一基板的俯视图，图17是图16示出的第一基板在D-D’处的膜层结构示意图。第一基板100中的多条触控信号线Tx均可以设置的第一衬底100上。
请参考图18和图19所示，图18是图15示出的液晶手写面板中的第二基 板的俯视图，图19是图18示出的第二基板在E-E’处的膜层结构示意图。第二基板200还可以包括：多条数据线D、多条栅线和多个薄膜晶体管T。需要说明的是，多条数据线D、多条栅线和多个薄膜晶体管T的结构可以参考上述第一种示例性的实现方式中的对应内容，本申请实施例在此不做赘述。
还需要说明的是，当多条数据线D位于第二基板200内，多条触控信号线Tx位于第一基板100内时，数据线D的延伸方向可以与触控信号线Tx的延伸方向平行，也可以与触控信号线Tx的延伸方向垂直。
在这种情况下，由于第一基板100中的第一衬底101是柔性衬底，第二基板200中的第二衬底201是刚性衬底。因此，当第一驱动电极层103包括公共电极500，第二驱动电极层203包括多个像素电极400时，仅需要在柔性衬底上形成公共电极500和触控电极层102即可，而像素电极400以及薄膜晶体管T均可以在刚性衬底上形成。这样，柔性衬底上所要形成的结构较少，可以降低第一基板100的制作难度，进而降低液晶手写面板000的制造难度。
在本申请中，第二基板200还可以包括：与栅线G同层设置的辅助信号线L。其中，辅助信号线L的条数为多条，每条辅助信号线L在第二衬底201上的正投影与一行像素电极400在第二衬底201上的正投影存在交叠区域。辅助信号线L与像素电极400之间可以构成的存储电容Cst。该存储电容Cst可以用于保持像素电极400的像素电压。此外，由于辅助信号线L在第二基板200上，因此，该辅助信号线L并不糊遮挡被呈平面织构的双稳态液晶分子反射回的环境光线。
在本申请实施例中，如图15所示，液晶手写面板000还包括：位于第一基板100和第二基板200之间的隔垫物600，隔垫物600与第一基板100和第二基板200中的一个固定。需要说明的是，隔垫物600的结构及其原理可以参考上述第一种示例性的实现方式中的对应部分，本申请实施例在此不再赘述。
可选的，如图15所示，液晶手写面板000中的控制组件010还可以包括：第一驱动电路板0101、第二驱动电路板0103和控制电路板0102。控制电路板0102分别与第一驱动电路板0101和第二驱动电路板0103电连接，且第一驱动电路板0101可以与第一基板100电连接，第二驱动电路板0103可以与第二基板200电连接。其中，第一驱动电路板0101和第二驱动电路板0103均可以为柔性电路板或者带有驱动芯片的覆晶薄膜。
这里，第一驱动电路板0101用于通过触控电极层102确定外界物体与第一基板的接触位置，第二驱动电路板0102用于向像素电极施加像素电压，控制电路板0103用于控制第一驱动电路板0101和第二驱动电路板0102进行工作。例如，控制电路板0102可以通过第一驱动电路板0101确定出待擦除区域的位置，并通过第二驱动电路板0102向待擦除区域内的像素电极施加像素电压。
示例的，第一基板100的外围区域具有绑定结构，第一驱动电路板0101可以通过绑定工艺与第一基板100的绑定结构电连接。其中，第一基板100的绑定结构可以与第一基板100内的触控信号线Tx电连接，这样，在第一驱动电路板0101与第一基板100的绑定结构电连接后，第一驱动电路板0101能够为触控信号线Tx提供相应的电信号。
第二基板200的外围区域具有绑定结构，第二驱动电路板0103可以通过绑定工艺与第二基板200的绑定结构电连接。其中，第二基板200的绑定结构可以分别与第二基板200内的数据线D和栅线G电连接，这样，在第二驱动电路板0103与第二基板200的绑定结构电连接后，第二驱动电路板0103能够为数据线D和栅线G提供相应的电信号。
需要说明的是，在第一基板100与第二基板200对盒后，需要在第一基板100与第二基板200之间涂覆导电胶。这样，第一基板100中的公共电极500可以通过导电胶和第二驱动电路板0103与控制电路板0102电连接。例如，公共电极500可以与控制电路板0102中的参考电压端电连接，使得该参考电压端可以始终向公共电极500提供公共电压。
可选的，如图20和图21所示，图20是图15示出的液晶手写面板中的第一基板的另一种俯视图，图21是图15示出的液晶手写面板中的第二基板的另一种俯视图。液晶手写面板000中的第一驱动电路板0101可以包括：触控驱动电路板010c。液晶手写面板000中的第二驱动电路板0103可以包括：源极驱动电路板010b。其中，源极驱动电路板010b可以与多条数据线D电连接；触控驱动电路板010c可以与多条触控信号线Tx电连接。
液晶手写面板000中的第一基板100的外围区域内设置有GOA电路010a，GOA电路010a可以分别与栅线G和第二驱动电路板0103电连接。这样，第二驱动电路板0103可以通过GOA电路010a与栅线G电连接。
需要说明的是，栅极驱动电路板010a、源极驱动电路板010b和触控驱动电 路板010c的工作原理，可以参考上述第一种示例性的实现方式中的对应部分，本申请实施例在此不再赘述。
还需要说明的是，由于第二驱动电路板0103向像素电极施加像素电压的持续时长在150毫秒至650毫秒的范围内；第一驱动电路板0101通过触控电极层感测触控位置的周期在2毫秒至40毫秒的范围内，第二驱动电路板0103施加的信号与第一驱动电路板0101施加的信号之间结合的并不密切。因此，无需将第二驱动电路板0103和第一驱动电路板0101结合在一起，第二驱动电路板0103仅需要与第二基板200进行绑定即可，而第一驱动电路板0101仅需要与第一基板100进行绑定即可，进一步的降低了手写装置的制造难度。
综上所述，本申请实施例提供的液晶手写面板，包括：包括：相对设置的第一基板和第二基板，以及位于二者之间的液晶层。液晶手写面板中的第一基板具有触控电极层。通过在第一基板中设置触控电极层，可以确定外界物体与第一基板的接触区域的位置。例如，在液晶手写面板处于擦除模式时，控制组件可以通过触控电极层检测擦除工具与第一基板的接触区域的位置，该位置即为待擦除区域的位置，在控制组件对待擦除区域内的像素电极施加像素电压后，便能够让手写装置实现书写笔迹的擦除功能。又例如，在液晶手写面板处于书写模式时，控制组件可以通过触控电极层检测书写工具与第一基板的接触区域的位置，该位置即为书写笔迹定位置，在控制组件生成与该书写笔迹对应的图像信息，便能够让手写装置实现对书写笔迹的保存功能。无需在液晶手写面板中设置红外定位装置，仅需要在第一基板内集成的触控电极层变能够实现对书写笔迹的保存或擦除功能，有效的降低了液晶手写面板的整体厚度，以及液晶手写面板的边框的宽度，使得液晶手写面板的屏占比较高。
本申请实施例还提供了一种手写装置的控制方法，应用于上述实施例中的液晶手写面板。示例的，该液晶手写面板为图4、图7或图15示出的液晶手写面板。手写装置的控制方法可以包括：
步骤S1、在液晶手写面板处于擦除模式时，通过触控电极层确定待擦除区域的位置信息；
步骤S2、基于待擦除区域的位置信息，通过控制组件向待擦除区域内的像素电极施加像素电压，以使待擦除区域内的像素电极与公共电极之间形成电压 差。
可选的，手写装置的控制方法还可以包括：
在液晶手写面板处于书写模式时，通过触控电极层确定书写笔迹的位置信息，并生成与书写笔迹对应的图像信息。
可选的，手写装置的控制方法还可以包括：
通过触控电极层对与第一基板接触的外界物体进行检测，确定液晶手写面板所处模式；
在确定出液晶手写面板处于擦除模式后，将外界物体与第一基板接触的位置信息确定为待擦除的区域的位置信息；
在确定出液晶手写面板处于书写模式后，将外界物体与第一基板接触的位置信息确定为书写笔迹的位置信息。
可选的，通过触控电极层对与第一基板接触的外界物体进行检测，确定液晶手写面板所处模式，包括：
通过触控电极层检测外界物体与第一基板的接触区域的面积，和/或，检测外界物体与第一基板接触后的电容变化量，确定液晶手写面板所处模式。
所属领域的技术人员可以清楚地了解到，为描述的方便和简洁，上述描述的手写装置的控制方法的具体工作原理，可以参考前述液晶手写面板的结构实施例中的对应部分，在此不再赘述。
需要指出的是，在附图中，为了图示的清晰可能夸大了层和区域的尺寸。而且可以理解，当元件或层被称为在另一元件或层“上”时，它可以直接在其他元件上，或者可以存在中间的层。另外，可以理解，当元件或层被称为在另一元件或层“下”时，它可以直接在其他元件下，或者可以存在一个以上的中间的层或元件。另外，还可以理解，当层或元件被称为在两层或两个元件“之间”时，它可以为两层或两个元件之间惟一的层，或还可以存在一个以上的中间层或元件。通篇相似的参考标记指示相似的元件。
在本申请中，术语“第一”和“第二”仅用于描述目的，而不能理解为指示或暗示相对重要性。术语“多个”指两个或两个以上，除非另有明确的限定。以上所述仅为本申请的可选的实施例，并不用以限制本申请，凡在本申请的精神和原则之内，所作的任何修改、等同替换、改进等，均应包含在本申请的保 护范围之内。

Claims (15)

  1. 一种液晶手写面板，其特征在于，包括：相对设置的第一基板和第二基板，以及位于所述第一基板和所述第二基板之间的液晶层；
    所述第一基板包括：第一衬底，以及位于所述第一衬底一侧的触控电极层和位于所述第一衬底一侧的第一驱动电极层，所述第一驱动电极层相比于所述触控电极层更靠近所述液晶层；
    所述第二基板包括：第二衬底，以及位于所述第二衬底一侧的第二驱动电极层和位于所述第二衬底一侧的遮光层；
    其中，所述第一驱动电极层和所述第二驱动电极层中的一个包括多个像素电极，另一个包括公共电极。
  2. 根据权利要求1所述的液晶手写面板，其特征在于，所述触控电极层包括：多个触控电极块，所述触控电极块在所述第一衬底上的正投影，与至少一个所述像素电极在所述第一衬底上的正投影存在交叠区域；
    所述第一基板还包括：多条触控信号线，所述多条触控信号线与所述多个触控电极块一一对应电连接。
  3. 根据权利要求2所述的液晶手写面板，其特征在于，当所述第一驱动电极层包括所述多个像素电极时，所述第一基板还包括：多条数据线和多个薄膜晶体管，所述数据线通过所述薄膜晶体管与所述像素电极电连接；
    其中，所述多条数据线和所述多条触控信号线同层设置，且材料相同。
  4. 根据权利要求2所述的液晶手写面板，其特征在于，所述第一基板还包括：位于所述多条触控信号线与所述触控电极层之间的第一绝缘层，所述第一绝缘层具有多个第一过孔，所述触控信号线通过至少一个所述第一过孔与对应的触控电极块电连接。
  5. 根据权利要求2至4任一所述的液晶手写面板，其特征在于，所述第一基板还包括：位于所述第一驱动电极层与所述触控电极层之间的第二绝缘层，所 述触控电极层相对于所述第一驱动电极层靠近所述第一衬底。
  6. 根据权利要求1至4任一所述的液晶手写面板，其特征在于，所述液晶手写面板还包括：位于所述第一基板和所述第二基板之间的隔垫物，所述隔垫物与所述第一基板和所述第二基板中的一个固定。
  7. 根据权利要求1至4任一所述的液晶手写面板，其特征在于，所述第一衬底为柔性衬底，所述触控电极层和所述第一驱动电极层均位于所述柔性衬底靠近所述第二基板的一侧。
  8. 根据权利要求1所述的液晶手写面板，其特征在于，所述第一衬底为柔性衬底，所述触控电极层和所述第一驱动电极层均位于所述柔性衬底靠近所述第二基板的一侧；
    所述第二衬底为刚性衬底，所述第一驱动电极层包括所述公共电极，所述第二驱动电极层包括所述多个像素电极。
  9. 一种手写装置，其特征在于，包括：权利要求1至8任一所述的液晶手写面板，以及与所述液晶手写面板电连接的控制组件；
    所述控制组件被配置为：在所述液晶手写面板处于擦除模式时，通过所述触控电极层确定待擦除区域的位置信息，并向所述待擦除区域内的像素电极施加像素电压，以使所述待擦除区域内的像素电极与所述公共电极之间形成电压差。
  10. 根据权利要求9所述的手写装置，其特征在于，所述控制组件还被配置为：在所述液晶手写面板处于书写模式时，通过所述触控电极层确定书写笔迹的位置信息，并生成与所述书写笔迹对应的图像信息。
  11. 根据权利要求10所述的手写装置，其特征在于，所述控制组件向所述像素电极施加所述像素电压的持续时长在150毫秒至650毫秒的范围内；
    所述控制组件通过所述触控电极层感测触控位置的周期在2毫秒至40毫秒 的范围内。
  12. 一种手写装置的控制方法，其特征在于，应用于权利要求9或10所述的手写装置，所述方法包括：
    在所述液晶手写面板处于擦除模式时，通过所述触控电极层确定待擦除区域的位置信息；
    基于所述待擦除区域的位置信息，通过所述控制组件向所述待擦除区域内的像素电极施加像素电压，以使所述待擦除区域内的像素电极与所述公共电极之间形成电压差。
  13. 根据权利要求12所述的方法，其特征在于，所述方法还包括：
    在所述液晶手写面板处于书写模式时，通过所述触控电极层确定书写笔迹的位置信息，并生成与所述书写笔迹对应的图像信息。
  14. 根据权利要求13所述的方法，其特征在于，所述方法还包括：
    通过所述触控电极层对与所述第一基板接触的外界物体进行检测，确定所述液晶手写面板所处模式；
    在确定出所述液晶手写面板处于所述擦除模式后，将所述外界物体与所述第一基板接触的位置信息确定为所述待擦除的区域的位置信息；
    在确定出所述液晶手写面板处于所述书写模式后，将所述外界物体与所述第一基板接触的位置信息确定为所述书写笔迹的位置信息。
  15. 根据权利要求14所述的方法，其特征在于，通过所述触控电极层对与所述第一基板接触的外界物体进行检测，确定所述液晶手写面板所处模式，包括：
    通过所述触控电极层检测外界物体与所述第一基板的接触区域的面积，和/或，检测外界物体与所述第一基板接触后的电容变化量，确定所述液晶手写面板所处模式。
PCT/CN2021/127187 2021-10-28 2021-10-28 液晶手写面板、手写装置及其控制方法 WO2023070469A1 (zh)

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