WO2019127640A1 - 一种可局部擦拭液晶手写装置 - Google Patents

一种可局部擦拭液晶手写装置 Download PDF

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Publication number
WO2019127640A1
WO2019127640A1 PCT/CN2018/071495 CN2018071495W WO2019127640A1 WO 2019127640 A1 WO2019127640 A1 WO 2019127640A1 CN 2018071495 W CN2018071495 W CN 2018071495W WO 2019127640 A1 WO2019127640 A1 WO 2019127640A1
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Prior art keywords
liquid crystal
crystal layer
crystal handwriting
unit
panel unit
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PCT/CN2018/071495
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English (en)
French (fr)
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梁雁扬
江宗宪
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深圳市睿帘智造科技有限公司
佛山市南海区瑞联胶粘制品有限公司
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Publication of WO2019127640A1 publication Critical patent/WO2019127640A1/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
    • G02F1/137—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 characterised by the electro-optical or magneto-optical effect, e.g. field-induced phase transition, orientation effect, guest-host interaction or dynamic scattering
    • G02F1/139—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 characterised by the electro-optical or magneto-optical effect, e.g. field-induced phase transition, orientation effect, guest-host interaction or dynamic scattering based on orientation effects in which the liquid crystal remains transparent
    • G02F1/1391—Bistable or multi-stable liquid crystal cells

Definitions

  • the present invention relates to the technical field of liquid crystal devices, and in particular, to a partial wiping liquid crystal handwriting device.
  • a general liquid crystal handwriting device can be written in any solid object that can be pressed, and a specific pressure is applied to the liquid crystal handwriting device to cause deformation of the liquid crystal layer of the pressing region, thereby, the original partially transparent liquid crystal layer. It is converted into a reflective liquid crystal layer, and by this method, the effect of handwritten characters or patterns is achieved.
  • the present invention is achieved by a method for partially wiping a liquid crystal handwriting device, including:
  • the sliding partial wiping unit being disposed on an upper side of the liquid crystal handwriting panel unit;
  • the sliding partial wiping unit covers the area under the area by applying a specific first pulse voltage to the sliding partial wiping unit and moving the sliding partial wiping unit above the reflective liquid crystal layer
  • the reflective liquid crystal layer is converted into the transparent liquid crystal layer.
  • the partially wipeable liquid crystal handwriting device further comprises a sliding partial wiping support slide rail, wherein the sliding partial wiping unit is disposed on the sliding partial wiping support slide rail, the sliding partial wiping support The slide rail is disposed around the liquid crystal handwriting panel unit.
  • the partially wipeable liquid crystal handwriting device further comprises a hand-held partial wiping unit disposed on an upper side of the liquid crystal handwriting panel unit, by applying the hand-held partial wiping unit And a specific second pulse voltage, the handheld partial wiping unit is moved above the reflective liquid crystal layer to convert the reflective liquid crystal layer of the coverage area into a transparent liquid crystal layer.
  • the sliding type partial wiping unit comprises a sliding strip-shaped insulating substrate and a first conductive layer, and the first conductive layer is disposed between the sliding strip-shaped insulating substrate and the liquid crystal handwriting panel unit.
  • the first conductive layer has a first wide width
  • the liquid crystal handwriting panel unit has a second wide width
  • the first wide width is greater than or equal to 1 mm, and less than or equal to one tenth of the first Two wide.
  • the body resistance value of the first conductive layer is less than or equal to.
  • the hand-held partial wiping unit comprises a hand-held columnar insulating substrate and a second conductive layer, and the second conductive layer is disposed between the hand-held columnar insulating substrate and the liquid crystal handwriting panel unit.
  • the second conductive layer has a third wide width
  • the liquid crystal handwriting panel unit has a second wide width
  • the third wide width is greater than or equal to 1 mm, and is less than or equal to one tenth The second wide.
  • the second conductive layer has a bulk resistance value less than or equal to.
  • the liquid crystal handwriting panel unit comprises a first transparent conductive film, a second transparent insulating substrate and a bistable liquid crystal layer, wherein the bistable liquid crystal layer is disposed on the first transparent conductive film and Between the second transparent insulating substrates; the bistable liquid crystal layer exhibits a transparent state in a power-off state without any pressure deformation, and at this time, the bistable The liquid crystal layer is the transparent liquid crystal layer; in a power-off state, applying a specific pressure to the liquid crystal handwriting panel unit causes deformation of the bistable liquid crystal layer, and the bistable liquid crystal layer is converted into light that can be reflected.
  • the bistable liquid crystal layer is the reflective liquid crystal layer.
  • the partially wipeable liquid crystal handwriting device Compared with the prior art, the partially wipeable liquid crystal handwriting device provided by the present invention has the following beneficial effects: the sliding partial wiping unit is disposed on the upper side of a liquid crystal handwriting panel unit, and is pulsed by the sliding partial wiping unit.
  • the voltage mode causes the liquid crystal handwriting panel unit to generate a change in liquid crystal characteristics from a reflective liquid crystal layer to a transparent liquid crystal layer, and provides partial wiping effects such as patterns and characters written on the liquid crystal handwriting panel unit.
  • FIG. 1 is a schematic structural diagram of a general liquid crystal handwriting device provided by the prior art
  • FIG. 2 is a schematic diagram of a principle of a partially wiping liquid crystal handwriting device according to an embodiment of the present invention
  • FIG. 3 is a schematic diagram of another principle of a partially wiping liquid crystal handwriting device according to an embodiment of the present invention
  • FIG. 4 is a schematic diagram of another principle of partially wiping a liquid crystal handwriting device according to an embodiment of the present invention.
  • the embodiment provides a partial wiping liquid crystal handwriting device, comprising a liquid crystal handwriting panel unit, a sliding partial wiping unit, a sliding partial wiping support sliding rail and a hand-held partial wiping unit.
  • the liquid crystal handwriting panel unit converts a transparent liquid crystal layer of the local area into a reflective liquid crystal layer by applying a specific pressure to any partial area of the surface of the liquid crystal handwriting panel unit. After the specific pressure applied is eliminated, the local portion is removed. The region is still maintained in a state in which the liquid crystal layer can be reflected;
  • the sliding partial wiping unit is disposed on the upper side of the liquid crystal handwriting panel unit and is fixed to the sliding partial wiping support sliding rail, and the sliding partial wiping supporting sliding rail is disposed around the liquid crystal handwriting panel unit.
  • the above-mentioned partially wipeable liquid crystal handwriting device has the following beneficial effects: the sliding partial wiping unit is disposed on the upper side of a liquid crystal handwriting panel unit, and the liquid crystal handwriting panel unit is applied by applying a pulse voltage method to the sliding partial wiping unit.
  • the change in the liquid crystal characteristics from a reflective liquid crystal layer to a transparent liquid crystal layer is provided, providing a local wiping effect of patterns and characters written on the liquid crystal handwriting panel unit.
  • the sliding partial wiping unit comprises a sliding strip-shaped insulating substrate and a first conductive layer, the first conductive layer is disposed between the sliding strip-shaped insulating substrate and the liquid crystal handwriting panel unit; the first conductive layer has a first wide width, and the liquid crystal The handwriting panel unit has a second wide width, the first wide width is greater than or equal to 1 mm, and is less than or equal to one tenth of the second wide width; the first conductive layer has a volume resistance value less than or equal to.
  • the reflective liquid crystal under the coverage area of the sliding partial wiping unit can be The layer is converted into a transparent liquid crystal layer.
  • the hand-held partial wiping unit is disposed on the upper peripheral area of the liquid crystal handwriting panel unit.
  • the original transparent liquid crystal layer is transformed into a reflective liquid crystal in the local area.
  • the layer remains in the state of the reflective liquid crystal layer after the specific pressure applied is removed.
  • the hand-held partial wiping unit comprises a hand-held columnar insulating substrate and a second conductive layer, and the second conductive layer is disposed between the hand-held columnar insulating substrate and the liquid crystal handwriting panel unit.
  • the second conductive layer has a third wide width, and the liquid crystal handwriting panel unit has a second wide width, the third wide width is greater than or equal to 1 mm, and is less than or equal to one tenth of the second wide width; the body of the second conductive layer The resistance value is less than or equal to.
  • the sliding partial wiping support slide rail is disposed on the sliding partial wiping support slide rail, and the sliding partial wiping support slide rail is disposed around the liquid crystal handwriting panel unit.
  • a hand-held partial wiping unit the hand-held partial wiping unit is disposed on the upper side of the liquid crystal handwriting panel unit, by applying a specific second pulse voltage to the hand-held partial wiping unit, and moving the hand-held partial wiping unit to the reflective liquid crystal layer Above, the reflective liquid crystal layer of the cover area can be converted into a transparent liquid crystal layer.
  • the user may choose to apply a specific first pulse voltage by the fixed partial wiping unit, or select a specific second pulse voltage by the hand-held partial wiping unit to move either one to the reflective liquid crystal layer.
  • the reflective liquid crystal layer can be converted into a transparent liquid crystal layer to achieve partial wiping.
  • the liquid crystal handwriting panel unit comprises a first transparent conductive film, a second transparent insulating substrate and a bistable liquid crystal layer, and the bistable liquid crystal layer is disposed between the first transparent conductive film and the second transparent insulating substrate, wherein When the bistable liquid crystal layer is de-energized without any pressure deformation, the bistable liquid crystal layer will exhibit a transparent state. At this time, the bistable liquid crystal layer is a transparent liquid crystal layer; Applying a specific pressure to the liquid crystal handwriting panel unit causes deformation of the bistable liquid crystal layer, and the bistable liquid crystal layer is transformed into a state in which light can be reflected. At this time, the bistable liquid crystal layer is a reflective liquid crystal layer.

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  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Liquid Crystal (AREA)

Abstract

一种可局部擦拭液晶手写装置，包含一液晶手写面板单元、一滑动式局部擦拭单元、一滑动式局部擦拭支撑滑轨与一手持式局部擦拭单元；用户对液晶手写面板单元表面任意局部区域施以特定压力时，会造成这个局部区域原来一透明液晶层变换成一可反射液晶层，在施以的特定压力消除后，这个局部区域仍维持在可反射液晶层状态。用户可以选择以固定式局部擦拭单元通过施以特定一第一脉冲电压，或者选择以手持式局部擦拭单元通过施以特定一第二脉冲电压，将两者任选一个移至可反射液晶层的上方，便可以将可反射液晶层转换成透明液晶层，达到可局部擦拭的功效。

Description

一种可局部擦拭液晶手写装置 技术领域
本发明涉及液晶设备的技术领域，尤其涉及一种可局部擦拭液晶手写装置。
 背景技术
请参阅图1，一般液晶手写装置的书写方式可以使用任何可以施压的固体对象，施以特定压力在该液晶手写装置上，造成该按压区的液晶层变形，从而，原先的部分透明液晶层转换成可反射液晶层，藉由此方法，达到手写文字或图纹的效果。
现有技术的这种液晶手写装置，如果要使用擦拭的功能时，只有一种功能选择，也就是全面擦拭掉，无法提供局部擦拭的功能。
 技术问题
本发明的目的在于提供一种可局部擦拭液晶手写装置，旨在解决现有技术中的液晶书写装置无法提供局部擦拭功能的问题。
 技术解决方案
本发明是这样实现的，一种可局部擦拭液晶手写装置，包括：
一液晶手写面板单元，通过对所述液晶手写面板单元表面任意局部区域施以特定压力时，会造成这个局部区域原来的一透明液晶层变换成一可反射液晶层，在施以的特定压力消除后，这个局部区域仍维持在可反射液晶层的状态；
一滑动式局部擦拭单元，所述滑动式局部擦拭单元配置在所述液晶手写面板单元的上侧；
通过在所述滑动式局部擦拭单元施以特定的一第一脉冲电压，并将所述滑动式局部擦拭单元移至所述可反射液晶层的上方，将所述滑动式局部擦拭单元覆盖区域下的所述可反射液晶层转换成所述透明液晶层。
进一步的，所述可局部擦拭液晶手写装置还包含一滑动式局部擦拭支撑滑轨，所述滑动式局部擦拭单元被配置在所述滑动式局部擦拭支撑滑轨上，所述滑动式局部擦拭支撑滑轨配置在所述液晶手写面板单元的周围。
进一步的，所述可局部擦拭液晶手写装置还包含一手持式局部擦拭单元，所述手持式局部擦拭单元配置在所述液晶手写面板单元的上侧，通过对所述手持式局部擦拭单元施以特定一第二脉冲电压，将所述手持式局部擦拭单元移至所述可反射液晶层的上方，将覆盖区域的所述可反射液晶层转换成透明液晶层。
进一步的，所述滑动式局部擦拭单元包含一滑动带状绝缘基板与一第一导电层，所述第一导电层配置在所述滑动带状绝缘基板与所述液晶手写面板单元之间。
进一步的，所述第一导电层具有一第一宽幅，所述液晶手写面板单元具有一第二宽幅，所述第一宽幅大于或等于1mm，且小于等于十分之一所述第二宽幅。
进一步的，所述第一导电层的体电阻值小于或等于。
进一步的，所述手持式局部擦拭单元包括一手持柱状绝缘基板与一第二导电层，所述第二导电层配置在所述手持柱状绝缘基板与所述液晶手写面板单元之间。
进一步的，所述第二导电层具有一第三宽幅，所述液晶手写面板单元具有一第二宽幅，所述第三宽幅大于或等于1mm，且小于或等于十分之一所述第二宽幅。
进一步的，所述第二导电层的体电阻值小于或等于。
进一步的，所述液晶手写面板单元包含一第一透明导电膜、一第二透明绝缘基材与一双稳态液晶层，所述双稳态液晶层配置在所述第一透明导电膜与所述第二透明绝缘基材之间；所述双稳态液晶层在断电状态且无任何施压形变的情况下，所述双稳态液晶层呈现透明的样态，此时，所述双稳态液晶层为所述透明液晶层；在断电状态下，对所述液晶手写面板单元施以特定压力造成所述双稳态液晶层产生形变，所述双稳态液晶层变换成可以反射光的样态，此时，所述双稳态液晶层为所述可反射液晶层。
 有益效果
与现有技术相比，本发明提供的可局部擦拭液晶手写装置，具有以下的有益效果：滑动式局部擦拭单元配置在一液晶手写面板单元之上侧，通过在滑动式局部擦拭单元施以脉冲电压方式，使液晶手写面板单元产生液晶特性从一可反射液晶层转换为一透明液晶层的变化，提供局部擦拭被书写在液晶手写面板单元上的图纹与文字等效果。
 附图说明
图1是现有技术提供的一般液晶手写装置的原理结构示意图；
图2是本发明实施例提供的一种可局部擦拭液晶手写装置的原理示意图；
图3是本发明实施例提供的另一种可局部擦拭液晶手写装置的原理示意图；图4是本发明实施例提供的另一种可局部擦拭液晶手写装置的原理示意图。
 本发明的实施方式
为了使本发明的目的、技术方案及优点更加清楚明白，以下结合附图及实施例，对本发明进行进一步详细说明。应当理解，此处所描述的具体实施例仅仅用以解释本发明，并不用于限定本发明。
以下结合具体实施例对本发明的实现进行详细的描述。
在本说明书的描述中，需要说明的是，除非另有明确的规定和限定，术语“设置”、“相连”及“连接”应做广义理解，例如，可以是固定连接，也可以是可拆卸连接，或一体地连接；可以是直接相连，也可以通过中间媒介间接相连，可以是两个元件内部的连通。对于本领域的普通技术人员而言，可以具体情况理解上述术语在本发明中的具体含义。
参照图2-4所示，为本发明提供的较佳实施例。
本实施例提供一种可局部擦拭液晶手写装置，包含一液晶手写面板单元、一滑动式局部擦拭单元、一滑动式局部擦拭支撑滑轨与一手持式局部擦拭单元。
液晶手写面板单元，通过对液晶手写面板单元表面任意局部区域施以特定压力时，会造成这个局部区域原来的一透明液晶层变换成一可反射液晶层，在施以的特定压力消除后，这个局部区域仍维持在可反射液晶层的状态；
滑动式局部擦拭单元配置在液晶手写面板单元之上侧，并固定于滑动式局部擦拭支撑滑轨，滑动式局部擦拭支撑滑轨配置在液晶手写面板单元之周围。
上述提供的可局部擦拭液晶手写装置，具有以下的有益效果：滑动式局部擦拭单元配置在一液晶手写面板单元的上侧，通过在滑动式局部擦拭单元施以脉冲电压方式，使液晶手写面板单元产生液晶特性从一可反射液晶层转换为一透明液晶层的变化，提供局部擦拭被书写在液晶手写面板单元上的图纹与文字等效果。
滑动式局部擦拭单元包含一滑动带状绝缘基板与一第一导电层，第一导电层配置在滑动带状绝缘基板与液晶手写面板单元之间；第一导电层具有一第一宽幅，液晶手写面板单元具有一第二宽幅，第一宽幅大于或等于1mm，且小于或等于十分之一所述第二宽幅；第一导电层的体电阻值小于或等于。
其中，通过在滑动式局部擦拭单元施以特定的一第一脉冲电压，并将滑动式局部擦拭单元移至可反射液晶层的上方，便可将滑动式局部擦拭单元覆盖区域下的可反射液晶层转换成透明液晶层。
手持式局部擦拭单元配置在液晶手写面板单元之上侧周边区域，其中，用户对液晶手写面板单元表面任意局部区域施以特定压力时，会造成这个局部区域原来一透明液晶层变换成一可反射液晶层，在施以的特定压力消除后，这个局部区域仍维持在可反射液晶层状态。
手持式局部擦拭单元包含一手持柱状绝缘基板与一第二导电层，第二导电层配置于手持柱状绝缘基板与液晶手写面板单元之间。
第二导电层具有一第三宽幅，液晶手写面板单元具有一第二宽幅，第三宽幅大于或等于1mm，且小于或等于十分之一第二宽幅；第二导电层的体电阻值小于或等于。
滑动式局部擦拭支撑滑轨，滑动式局部擦拭单元被配置于滑动式局部擦拭支撑滑轨之上，滑动式局部擦拭支撑滑轨配置于液晶手写面板单元之周围。
手持式局部擦拭单元，手持式局部擦拭单元配置在液晶手写面板单元之上侧，通过在手持式局部擦拭单元施以特定一第二脉冲电压，并将手持式局部擦拭单元移至可反射液晶层的上方，便可将覆盖区域可反射液晶层转换成透明液晶层。
用户可以选择以固定式局部擦拭单元通过施以特定一第一脉冲电压，或者选择以手持式局部擦拭单元通过施以特定一第二脉冲电压，将两者任选一个移至可反射液晶层的上方，便可以将可反射液晶层转换成透明液晶层，达到可局部擦拭的功效。
液晶手写面板单元包含一第一透明导电膜、一第二透明绝缘基材与一双稳态液晶层，双稳态液晶层配置于第一透明导电膜与第二透明绝缘基材之间，其中，双稳态液晶层在断电下且无任何施压形变的情况下，则双稳态液晶层会呈现透明的样态，此时，双稳态液晶层为透明液晶层；在断电下，对液晶手写面板单元施以特定压力造成双稳态液晶层产生形变，双稳态液晶层会变换成可以反射光的样态，此时，双稳态液晶层为可反射液晶层。
以上所述仅为本发明的较佳实施例而已，并不用以限制本发明，凡在本发明的精神和原则之内所作的任何修改、等同替换和改进等，均应包含在本发明的保护范围之内。

Claims (10)

  1. 一种可局部擦拭液晶手写装置，其特征在于，包括：
    一液晶手写面板单元，通过对所述液晶手写面板单元表面任意局部区域施以特定压力时，会造成这个局部区域原来的一透明液晶层变换成一可反射液晶层，在施以的特定压力消除后，这个局部区域仍维持在可反射液晶层的状态；
    一滑动式局部擦拭单元，所述滑动式局部擦拭单元配置在所述液晶手写面板单元的上侧；
    通过在所述滑动式局部擦拭单元施以特定的一第一脉冲电压，并将所述滑动式局部擦拭单元移至所述可反射液晶层的上方，将所述滑动式局部擦拭单元覆盖区域下的所述可反射液晶层转换成所述透明液晶层。
  2. 如权利要求1所述的一种可局部擦拭液晶手写装置，其特征在于，所述可局部擦拭液晶手写装置还包含一滑动式局部擦拭支撑滑轨，所述滑动式局部擦拭单元被配置在所述滑动式局部擦拭支撑滑轨上，所述滑动式局部擦拭支撑滑轨配置在所述液晶手写面板单元的周围。
  3. 如权利要求1所述的一种可局部擦拭液晶手写装置，其特征在于，所述可局部擦拭液晶手写装置还包含一手持式局部擦拭单元，所述手持式局部擦拭单元配置在所述液晶手写面板单元的上侧，通过对所述手持式局部擦拭单元施以特定一第二脉冲电压，将所述手持式局部擦拭单元移至所述可反射液晶层的上方，将覆盖区域的所述可反射液晶层转换成透明液晶层。
  4. 如权利要求1所述的一种可局部擦拭液晶手写装置，其特征在于，所述滑动式局部擦拭单元包含一滑动带状绝缘基板与一第一导电层，所述第一导电层配置在所述滑动带状绝缘基板与所述液晶手写面板单元之间。
  5. 如权利要求4所述的一种可局部擦拭液晶手写装置，其特征在于，所述第一导电层具有一第一宽幅，所述液晶手写面板单元具有一第二宽幅，所述第一宽幅大于或等于1mm，且小于等于十分之一所述第二宽幅。
  6. 如权利要求4所述的一种可局部擦拭液晶手写装置，其特征在于，所述第一导电层的体电阻值小于或等于。。
  7. 如权利要求3所述的一种可局部擦拭液晶手写装置，其特征在于，所述手持式局部擦拭单元包括一手持柱状绝缘基板与一第二导电层，所述第二导电层配置在所述手持柱状绝缘基板与所述液晶手写面板单元之间。
  8. 如权利要求7所述的一种可局部擦拭液晶手写装置，其特征在于，所述第二导电层具有一第三宽幅，所述液晶手写面板单元具有一第二宽幅，所述第三宽幅大于或等于1mm，且小于或等于十分之一所述第二宽幅。
  9. 如权利要求7所述的一种可局部擦拭液晶手写装置，其特征在于，所述第二导电层的体电阻值小于或等于。
  10. 如权利要求7所述的一种可局部擦拭液晶手写装置，其特征在于，所述液晶手写面板单元包含一第一透明导电膜、一第二透明绝缘基材与一双稳态液晶层，所述双稳态液晶层配置在所述第一透明导电膜与所述第二透明绝缘基材之间；所述双稳态液晶层在断电状态且无任何施压形变的情况下，所述双稳态液晶层呈现透明的样态，此时，所述双稳态液晶层为所述透明液晶层；在断电状态下，对所述液晶手写面板单元施以特定压力造成所述双稳态液晶层产生形变，所述双稳态液晶层变换成可以反射光的样态，此时，所述双稳态液晶层为所述可反射液晶层。
PCT/CN2018/071495 2017-12-26 2018-01-05 一种可局部擦拭液晶手写装置 WO2019127640A1 (zh)

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