CN111458945A - Writing device and display method thereof - Google Patents

Writing device and display method thereof Download PDF

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Publication number
CN111458945A
CN111458945A CN202010407426.4A CN202010407426A CN111458945A CN 111458945 A CN111458945 A CN 111458945A CN 202010407426 A CN202010407426 A CN 202010407426A CN 111458945 A CN111458945 A CN 111458945A
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writing
liquid crystal
display panel
color
electric field
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CN202010407426.4A
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CN111458945B (en
Inventor
武晓娟
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Beijing BOE Optoelectronics Technology Co Ltd
Zhejiang Luyuan Electric Vehicle Co Ltd
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Beijing BOE Optoelectronics Technology Co Ltd
Zhejiang Luyuan Electric Vehicle Co Ltd
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Publication of CN111458945A publication Critical patent/CN111458945A/en
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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
    • 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
    • G02F1/1343—Electrodes
    • 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
    • G02F1/1347—Arrangement of liquid crystal layers or cells in which the final condition of one light beam is achieved by the addition of the effects of two or more layers or cells
    • G02F1/13476—Arrangement of liquid crystal layers or cells in which the final condition of one light beam is achieved by the addition of the effects of two or more layers or cells in which at least one liquid crystal cell or layer assumes a scattering state
    • 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 
    • G02F1/165—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 translational movement of particles in a fluid under the influence of an applied field
    • G02F1/166—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 translational movement of particles in a fluid under the influence of an applied field characterised by the electro-optical or magneto-optical effect
    • G02F1/167—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 translational movement of particles in a fluid under the influence of an applied field characterised by the electro-optical or magneto-optical effect by electrophoresis
    • 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 
    • G02F1/165—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 translational movement of particles in a fluid under the influence of an applied field
    • G02F1/1675—Constructional details
    • G02F1/16757—Microcapsules
    • 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 
    • G02F1/165—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 translational movement of particles in a fluid under the influence of an applied field
    • G02F1/1675—Constructional details
    • G02F1/1676—Electrodes
    • 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
    • G02F1/1347—Arrangement of liquid crystal layers or cells in which the final condition of one light beam is achieved by the addition of the effects of two or more layers or cells
    • G02F1/13478—Arrangement of liquid crystal layers or cells in which the final condition of one light beam is achieved by the addition of the effects of two or more layers or cells based on selective reflection

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  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Mathematical Physics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Molecular Biology (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)

Abstract

The invention discloses a writing device and a display method thereof, the writing device provided by the invention can realize writing handwriting with different colors, the color display is not influenced by the writing position, the writing with different colors is not interfered with each other, the problem of non-uniform color is solved, and the local erasing with different colors is also not interfered with each other; the invention overcomes the defect that the traditional writing equipment can only display a single color, is convenient to add or delete the annotations with different colors at any time in the writing process, and improves the experience degree of users.

Description

Writing device and display method thereof
Technical Field
The invention relates to the technical field of display, in particular to a writing device and a display method thereof.
Background
With the development of liquid crystal display technology, liquid crystal writing boards are applied more and more widely in the fields of education, business application and the like. The liquid crystal writing board on the market at present has the working principle that the bistable characteristic of liquid crystal is utilized to display and/or erase the writing content on the liquid crystal writing board. For example, the cholesteric liquid crystal is used as a writing film, the writing pressure trace of a writing pen is recorded by the pressure acting on a liquid crystal writing board, and the corresponding writing content is displayed; the cholesteric liquid crystal structure is changed by applying an electric field, so that the writing pressure track on the liquid crystal writing board disappears to realize erasing.
Because the cholesteric liquid crystal only reflects visible light with corresponding wavelength matched with the thread pitch of the cholesteric liquid crystal, the existing liquid crystal writing board or liquid crystal blackboard can only display single color, can not display different colors at the same time, and can not meet the requirement that writers need to annotate with handwriting with different colors.
Disclosure of Invention
In view of this, embodiments of the present invention provide a writing device and a display method thereof, which can simultaneously display writing traces with different colors, and the writing of different colors is not interfered with each other.
Therefore, the embodiment of the invention provides a writing device, which comprises a liquid crystal display panel and an electronic ink display panel which are arranged in a stacked mode, and a writing positioning structure, wherein the writing positioning structure is configured to determine writing track information of a writing tool on the surface of the liquid crystal display panel;
the liquid crystal display panel comprises a first substrate and a second substrate which are oppositely arranged, a plurality of first display areas are arranged between the first substrate and the second substrate, and each first display area comprises a first conductive structure and bistable liquid crystal molecules; the bistable liquid crystal molecules are configured to reflect light of a first color under the action of pressure or a first set electric field and are configured to be in a scattering state under the action of a second set electric field; the first conductive structure is configured to generate a first set electric field or a second set electric field in response to a received control signal to control the bistable liquid crystal molecules to switch between reflecting light of a first color and assuming a scattering state;
the electronic ink display panel comprises a third substrate and a fourth substrate which are oppositely arranged, a plurality of second display areas are arranged between the third substrate and the fourth substrate, and each second display area comprises a second conductive structure and an electronic ink structure; at least one microcapsule is distributed in the electronic ink structure, and charged particles of a substrate color and charged particles of a second color are encapsulated in the microcapsule; the second conductive structure is configured to generate a set electric field in response to a received control signal to move charged particles of a set color to a side close to the liquid crystal display panel.
Optionally, in the above writing device provided by the embodiment of the present invention, the first color is different from the base color and the second color.
Optionally, in the writing device provided in an embodiment of the present invention, the first conductive structure includes: a first electrode on a side of the first substrate facing the second substrate, and a second electrode on a side of the second substrate facing the first substrate; the bistable liquid crystal molecules are positioned between the first electrode and the second electrode; each first electrode forms a planar electrode arranged on the whole surface, and each second electrode is independent;
the second conductive structure includes: a third electrode on a side of the third substrate facing the fourth substrate, and a fourth electrode on a side of the fourth substrate facing the third substrate; the electronic ink structure is located between the third electrode and the fourth electrode; each of the third electrodes constitutes a planar electrode provided over the entire surface, and each of the fourth electrodes is independent of each other.
Optionally, in the writing device provided in the embodiment of the present invention, the first substrate is located on a side of the second substrate away from the electronic ink display panel, and the fourth substrate is located on a side of the third substrate away from the liquid crystal display panel;
the first substrate is a flexible substrate, and the second substrate and the third substrate are the same substrate.
Optionally, in the writing device provided in the embodiment of the present invention, the bistable liquid crystal molecules exhibit a focal conic texture under non-pressure and a planar texture under pressure; and the bistable liquid crystal molecules are switched between focal conic texture and planar texture under the action of the first set electric field and the second set electric field;
the charged particles of the base color are black charged particles, and the charged particles of the second color include one or a combination of white charged particles and red charged particles.
Optionally, in the writing device provided in an embodiment of the present invention, the writing positioning structure includes one or a combination of an infrared positioning structure, an inductive positioning structure, an ultrasonic positioning structure, an image positioning structure, or an electromagnetic positioning structure.
Optionally, in the writing device provided in the embodiment of the present invention, a storage structure is further included, where the storage structure is configured to store electronic display content imported in advance or store writing track information of a writing tool on the surface of the liquid crystal display panel.
Optionally, in the writing device provided in an embodiment of the present invention, the first display areas correspond to the second display areas one to one, or one of the second display areas corresponds to a plurality of the first display areas.
Correspondingly, an embodiment of the present invention further provides a display method of the writing device, including:
when the received control signal is used for determining that the electronic ink display panel is in a first color writing mode, controlling to apply a set voltage to all the second conductive structures in the electronic ink display panel to generate a corresponding third set electric field so that the charged particles displaying the substrate color move to the side close to the liquid crystal display panel; responding to a writing track of a writing tool on the surface of the liquid crystal display panel, reflecting light of a first color by the bistable liquid crystal molecules at a position corresponding to the writing track under the action of pressure or a first set electric field, and simultaneously controlling to apply a set voltage to the first conductive structure at a position of a non-writing track to generate a second set electric field so as to enable the bistable liquid crystal molecules at the position of the non-writing track to be in a scattering state;
when the bistable liquid crystal display panel is determined to be in a first color all-erasing mode in response to the received control signal, controlling all the first conductive structures in the liquid crystal display panel to generate a second set electric field so as to control the bistable liquid crystal molecules to be switched to be in a scattering state;
when the writing mode of the writing tool on the surface of the liquid crystal display panel is determined by the writing positioning structure in response to the received control signal, controlling a second conductive structure at a position corresponding to the writing track to generate a set electric field so that the charged particles of the second color in the microcapsule move to a side close to the liquid crystal display panel;
and when the control signal is received to determine that the electronic ink display panel is in a second color all-erasing mode, controlling all the second conductive structures in the electronic ink display panel to generate a third set electric field, so that the charged particles of the base color in the microcapsule move to the side close to the liquid crystal display panel.
Optionally, in the display method provided in the embodiment of the present invention, the method further includes:
and in a second color writing mode, responding to the writing track of the writing tool on the surface of the liquid crystal display panel determined by the writing positioning structure, and simultaneously controlling the first conductive structure at the position corresponding to the writing track to generate a second set electric field so as to keep the bistable liquid crystal molecules in a scattering state.
Optionally, in the display method provided in the embodiment of the present invention, the method further includes:
when the bistable liquid crystal display panel is determined to be in the first color local erasing mode in response to the received control signal, the writing track of a writing tool on the surface of the liquid crystal display panel is determined by the writing positioning structure, and the first conductive structure at the position corresponding to the writing track is controlled to generate a second set electric field so as to control the bistable liquid crystal molecules to be switched to be in the scattering state.
Optionally, in the display method provided in the embodiment of the present invention, the method further includes:
and when the writing positioning structure determines that the writing track of the writing tool on the surface of the liquid crystal display panel is in the second color local erasing mode in response to the received control signal, controlling the second conductive structure at the position corresponding to the writing track to generate a third set electric field so that the charged particles of the base color in the microcapsule move to the side close to the liquid crystal display panel.
Optionally, in the display method provided in the embodiment of the present invention, the method further includes: and under a second color local erasing mode, responding to the writing track of the writing tool on the surface of the liquid crystal display panel determined by the writing positioning structure, and simultaneously controlling the first conductive structure at the position corresponding to the writing track to generate a second set electric field so as to keep the bistable liquid crystal molecules in a scattering state.
Optionally, in the display method provided in the embodiment of the present invention, the method further includes:
and when the control signal is received to determine that the liquid crystal display panel is in the all-color all-erasing mode, controlling all the first conductive structures in the liquid crystal display panel to generate a second set electric field so as to control the bistable liquid crystal molecules to be switched to be in a scattering state, and simultaneously controlling all the second conductive structures in the electronic ink display panel to generate a third set electric field so that the charged particles of the base color in the microcapsule move to a side close to the liquid crystal display panel.
Optionally, in the display method provided in the embodiment of the present invention, the method further includes:
storing writing track information of the writing tool on the surface of the liquid crystal display panel in the storage structure;
and controlling the writing device to display the stored content in response to an instruction for calling the stored content in the storage structure.
The embodiment of the invention has the following beneficial effects:
according to the writing device and the display method thereof provided by the embodiment of the invention, writing chirographs with different colors can be realized, the color display is not influenced by the writing position, the writing with different colors is not interfered with each other, the problem of uneven color is avoided, and meanwhile, the local erasing with different colors is also not interfered with each other; the invention overcomes the defect that the traditional writing equipment can only display a single color, is convenient to add or delete the annotations with different colors at any time in the writing process, and improves the experience degree of users.
Drawings
FIG. 1 is a schematic cross-sectional view of a writing instrument according to an embodiment of the present invention;
FIG. 2 is a second schematic cross-sectional view of a writing instrument according to an embodiment of the present invention;
FIG. 3 is a third schematic cross-sectional view of a writing instrument according to an embodiment of the present invention;
FIG. 4 is a fourth schematic cross-sectional view of a writing instrument according to an embodiment of the present invention;
FIG. 5 is a schematic top view of a writing instrument according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of a writing pen provided in the embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be described in further detail with reference to the accompanying drawings, and it is apparent that the described embodiments are only a part of the embodiments of the present invention, not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The shapes and sizes of the various elements in the drawings are not to scale and are merely intended to illustrate the invention.
The following describes in detail a specific embodiment of a writing instrument and a display method thereof according to an embodiment of the present invention with reference to the drawings.
A writing instrument according to an embodiment of the present invention, as shown in fig. 1 to 4, fig. 1 and 3 are a structure of the writing instrument when no pressure is applied (i.e., during pressure writing), fig. 2 is a structure of the writing instrument when pressure is applied (i.e., during pressure writing), fig. 4 is a structure of the writing instrument when pressure is applied (i.e., during pressure writing) in fig. 1, and fig. 3 is a structure of the writing instrument when pressure is applied (i.e., during pressure writing), the writing instrument including a liquid crystal display panel 10 and an electronic ink display panel 20 which are arranged in a stacked manner, and a writing alignment structure (not shown in fig. 1) configured to determine writing trajectory information of a writing instrument (e.g., a writing pen) on a surface of the liquid crystal display panel 10;
the liquid crystal display panel 10 comprises a first substrate 1 and a second substrate 2 which are oppositely arranged, wherein a plurality of first display areas are arranged between the first substrate 1 and the second substrate 2, and each first display area comprises a first conductive structure 3 and bistable liquid crystal molecules 4;
the bistable liquid crystal molecules 4 are configured to reflect light of a first color under the action of pressure or a first set electric field, for example, when a writing pen performs pressure writing or when a set voltage is applied to the first conductive structure 3 to form a first set electric field, the bistable liquid crystal molecules can reflect light of the first color;
and the bistable liquid crystal molecules 4 are configured to be in a scattering state under the action of a second set electric field, for example, when a set voltage is applied to the first conductive structure 3 to form the second set electric field, the bistable liquid crystal molecules are in the scattering state; of course, when a set voltage is applied to the first conductive structure 3 to form a second set electric field, if a writing pen is used for writing with pressure at the same time, but the writing pressure is small, the bistable liquid crystal molecules can be in a scattering state;
the first conductive structure 3 is configured to generate a first set electric field or a second set electric field in response to a received control signal to control the bistable liquid crystal molecules 4 to switch between reflecting light of the first color and assuming a scattering state; for example, if the control signal received by the first conductive structure 3 is an erasing signal, the application of a set voltage to the first conductive structure 3 corresponding to the erasing position is controlled according to the information of the writing track to be erased to generate a second set electric field, so as to control the bistable liquid crystal molecules 4 to be in a scattering state; if the control signal received by the first conductive structure 3 is a signal for displaying a first color, the first conductive structure 3 corresponding to the writing position is controlled to apply a set voltage to generate a first set electric field according to the writing track information, and the bistable liquid crystal molecules 4 are controlled to reflect light of the first color;
the electronic ink display panel 20 includes a third substrate 5 and a fourth substrate 6 disposed opposite to each other, and a plurality of second display regions (fig. 1 illustrates one second display region as an example) are disposed between the third substrate 5 and the fourth substrate 6, each second display region includes a second conductive structure 7 and an electronic ink structure 8; at least one microcapsule 81 is distributed in the electronic ink structure 8, and the microcapsule 81 is encapsulated with the charged particles 01 of the base color and the charged particles 02 of the second color; the second conductive structure 7 is configured to generate a set electric field in response to a received control signal so as to move the charged particles of a set color to a side close to the liquid crystal display panel 10, and if the control signal received by the second conductive structure 7 indicates a base color for the writing when the writing is intended to indicate the base color, the second conductive structure 7 is controlled to apply a set voltage to generate a third set electric field so as to move the charged particles (01, described later) of the base color to a side close to the liquid crystal display panel 10; if the writing is supposed to display a second color (e.g., white and red, described later), the second conductive structure 7 receives a control signal to display the second color for the writing, and the second conductive structure 7 is controlled to apply a set voltage to generate a fourth set electric field or a fifth set electric field, so that the charged particles (02 and 03, described later) of the second color move to a side close to the liquid crystal display panel 10.
The writing device provided by the embodiment of the invention can realize writing of handwriting with different colors, the display of the colors is not influenced by the writing positions, the writing of the different colors is not interfered with each other, the problem of uneven colors is avoided, and the local erasing of the different colors is also not interfered with each other; the invention overcomes the defect that the traditional writing equipment can only display a single color, is convenient to add or delete the annotations with different colors at any time in the writing process, and improves the experience degree of users.
The scattering state means that the bistable liquid crystal molecules are in a transparent state, and macroscopically represent the color of the electronic ink display panel below the liquid crystal display panel displayed by the writing device.
In a specific implementation, in the liquid crystal display panel, a first set electric field corresponding to the bistable liquid crystal molecules reflecting light of a first color, a second set electric field corresponding to the bistable liquid crystal molecules in a scattering state and an erasing signal are different, so that the first set electric field or the second set electric field can be generated according to the writing requirement to realize the writing and erasing functions of the first color. In the electronic ink display panel, since the colors of the charged particles have three different colors, namely, a base color (black described below as an example) and a second color (red described below as an example), and the voltages required for the charged particles of the different colors to move to a side close to the display panel are different, that is, the generated electric fields are also different, so that the third electric field for the charged particles of the base color to move to a side close to the liquid crystal display panel, the fourth electric field for the charged particles of the white color to move to a side close to the liquid crystal display panel, and the fifth electric field for the charged particles of the red color to move to a side close to the liquid crystal display panel are different, and thus, a third set electric field, a fourth set electric field, or a fifth set electric field can be generated according to the display color requirements to realize the writing trajectory of the base color, the white color.
Specifically, since the first conductive structure and the second conductive structure in the liquid crystal display panel and the electronic ink display panel are independently disposed, the voltage applied by the first conductive structure and the voltage applied by the second conductive structure may be the same or different. For example, the first set electric field may be the same as any of the third set electric field, the fourth set electric field, or the fifth set electric field, and the second set electric field may be the same as any of the third set electric field, the fourth set electric field, or the fifth set electric field.
Specifically, under the action of an electric field, bistable liquid crystal molecules present a focal conic texture, scatter incident light and present a scattering state, and handwriting shows the color of an electronic ink display panel below the liquid crystal display panel; when pressure writing is carried out under the action of pressure, bistable liquid crystal molecules are converted from focal conic texture into planar texture, and under the condition of incident light, visible light with a certain wavelength can be reflected, so that the color (such as green) is displayed, and the liquid crystal display panel displays writing. If the writing handwriting is not required to be displayed or erased, only a set voltage is required to be applied to the first conductive structure to generate an electric field with a set size on the bistable liquid crystal molecules (if a set voltage is applied to all the second conductive structures to generate a second set electric field, the bistable liquid crystal molecules are completely erased, if a set voltage is applied to the second conductive structures corresponding to the writing positions to generate a second set electric field, the bistable liquid crystal molecules are partially erased), and at the moment, the bistable liquid crystal molecules are changed from a plane texture to a focal conic texture, so that the writing handwriting cannot be displayed; namely, the bistable liquid crystal molecules are switched between focal conic texture and planar texture under the action of a set electric field generated by the first conductive structure.
Specifically, under the action of an electric field, the bistable liquid crystal molecules are in a scattering state (the liquid crystal molecules are in a focal conic texture); when the electric field is removed, the bistable liquid crystal molecules still maintain a scattering state; the bistable liquid crystal molecules in a scattering state are converted into a plane texture from a focal conic texture under the action of pressure; when the pressure is removed, the bistable liquid crystal molecules still maintain a plane texture; the bistable liquid crystal molecules with plane texture are converted into focal conic texture under the action of electric field.
In order to display more writing traces with different colors in specific implementation, in the above writing device provided by the embodiment of the present invention, the first color is different from the base color and the second color.
In practical implementation, in the writing device provided in the embodiment of the present invention, the first color may be green, and the base color may be black, as shown in fig. 1 to 4, the charged particles of the base color are black charged particles 01; the second color may be white or red, and as shown in fig. 1-4, the charged particles of the second color include one or a combination of white charged particles 02 and red charged particles 03; fig. 1 and 2 are illustrations of an example in which black charged particles 01 and white charged particles 02 of a base color are encapsulated in each microcapsule 81; fig. 3 and 4 are illustrations of each microcapsule 81 in which black charged particles 01 of a base color, white charged particles 02 of a second color, and red charged particles 03 are encapsulated; of course, the first color, the base color, and the second color are not limited thereto.
In specific implementation, as shown in fig. 1 and 3, when no pressure is applied, i.e., when no pressure writing is performed, the bistable liquid crystal molecules exhibit a focal conic texture, scatter incident light, and exhibit a color of an electronic ink display panel below the liquid crystal display panel; when pressure writing is performed, as shown in the writing area B of fig. 2 and 4, the bistable liquid crystal molecules are transformed from focal conic texture to planar texture, and can reflect a certain wavelength of visible light, thereby displaying a first color (e.g., green) and displaying the writing content. When the color displayed by the liquid crystal display panel is to be erased completely, the set voltage is controlled to be applied to all the first conductive structures to generate a second set electric field, so that the first color is erased completely; when the color displayed by the liquid crystal display panel is required to be erased locally, the set voltage is controlled to be applied to the first conductive structure corresponding to the writing position to generate a second set electric field, so that the first color is erased locally.
As shown in fig. 1 and 3, when the electronic ink display panel 20 is in a non-writing state, a third set electric field is generated by applying a set voltage to all the second conductive structures 7, so that the charged black particles 01 are positioned on the side close to the liquid crystal display panel 10, and black is displayed as a ground color. As shown in fig. 2, when the electronic ink display panel 20 is in a writing state, such as the writing region C, a set voltage is applied to the second conductive structure 7 corresponding to the writing region C to generate a fourth set electric field, so that the white charged particles 02 move closer to the liquid crystal display panel 10, thereby displaying white. As shown in fig. 4, when the electronic ink display panel 20 is in a writing state, such as the writing region C, a set voltage is applied to the second conductive structure 7 corresponding to the writing region C to generate a fifth set electric field, so that the red charged particles 03 move to be close to the liquid crystal display panel 10 side, thereby displaying red; as in the writing region D, applying a set voltage to the second conductive structure 7 corresponding to the writing region D generates a fourth set electric field, so that the white charged particles 02 move closer to the liquid crystal display panel 10 side, thereby displaying white. Therefore, the writing device provided by the embodiment of the invention can be realized by controlling the application of the set voltage to the conductive structure corresponding to the writing position to generate the set electric field according to the color to be displayed at the writing position, and can realize local erasing.
In practical implementation, in the writing device provided in the embodiment of the present invention, as shown in fig. 1 to 4, the first conductive structure 3 includes: a first electrode 31 on a side of the first substrate 1 facing the second substrate 2, and a second electrode 32 on a side of the second substrate 2 facing the first substrate 1; the bistable liquid crystal molecules 4 are located between the first electrode 31 and the second electrode 32; each first electrode 31 constitutes a planar electrode provided over the entire surface, and each second electrode 32 is independent of each other; since the second electrodes 32 are independent of each other, the liquid crystal display panel according to the embodiment of the invention can locally erase the writing traces on the liquid crystal display panel.
The second conductive structure 7 includes: a third electrode 71 on the side of the third substrate 5 facing the fourth substrate 6, and a fourth electrode 72 on the side of the fourth substrate 6 facing the third substrate 5; the electronic ink structure 8 is located between the third electrode 71 and the fourth electrode 72; each third electrode 71 constitutes a planar electrode provided over the entire surface, and each fourth electrode 72 is independent of each other. Since the third electrodes 71 are independent of each other, the electronic ink display panel according to the embodiment of the invention can implement partial erasing and partial display of a writing trace of a specific color.
In the embodiment of the present invention, the planar electrodes provided over the entire surface are constituted by the first electrodes, the second electrodes are independent of each other, the planar electrodes provided over the entire surface are constituted by the third electrodes, and the planar electrodes provided over the entire surface are independent of each other.
Certainly, in specific implementation, the first electrode and the second electrode may also be both strip-shaped electrodes, and the first electrode and the second electrode are arranged in a crossed manner to form a conductive region; the third electrode and the fourth electrode can be strip electrodes, and the third electrode and the fourth electrode are arranged in a crossed mode to form a conductive area; all falling within the scope of protection of the present invention.
In a specific implementation manner, in the writing device provided in the embodiment of the present invention, the first conductive structure and the second conductive structure are respectively electrically connected to a voltage generating circuit, and the voltage generating circuit is configured to apply voltages to the corresponding first conductive structure and the second conductive structure, respectively, so as to form a set electric field (the first set electric field and the second set electric field) on the film layer where the bistable liquid crystal molecules are located, where the set electric field can implement writing of a first color or erasing of handwriting on the liquid crystal display panel; and forming a set electric field (such as the third set electric field, the fourth set electric field, and the fifth set electric field) on the film layer where the electronic ink structure is located, wherein the set electric field can move the charged particles with the set color to a side close to the display panel. Specifically, the voltage generating circuit may be in a form of a circuit known to those skilled in the art, and may be, for example, a passively controlled voltage generating circuit or an actively TFT controlled voltage generating circuit, which is not limited herein.
In a specific implementation, in the writing device provided in the embodiment of the present invention, as shown in fig. 5, the writing device further includes: the writing pen is provided with a key for controlling the on and off of each voltage generating circuit, and the writing pen is in wired or wireless communication with a control device on the writing device so as to control the on and off of the voltage generating circuits. Specifically, the writing pen can write and can send signals to control the formation of erasing electric fields on the liquid crystal display panel and the electronic ink display panel, so that the voltage generating circuit electrically connected with the first conductive structure and the voltage generating circuit electrically connected with the second conductive structure can be switched to be switched on at any time according to the required displayed handwriting color, and time and labor are saved. For example, keys corresponding to different voltage signals of the electronic ink display panel may be added to the writing pen, for example, a voltage signal key 001 capable of generating a voltage signal corresponding to a third set electric field, a voltage signal key 002 capable of generating a voltage signal corresponding to a fourth set electric field, and a voltage signal key 003 capable of generating a voltage signal corresponding to a fifth set electric field are disposed on the writing pen shown in fig. 5, so that voltage signals at positioning positions can be switched by the keys during writing, thereby displaying colors of different particles; a voltage signal for controlling writing of the first color or erasing of the first color on the liquid crystal display panel may be added to the writing pen, for example, a voltage signal button 004 capable of generating a voltage signal corresponding to a first set electric field and a voltage signal button 005 capable of generating a voltage signal corresponding to a second set electric field are arranged on the writing pen shown in fig. 5, so that when writing or erasing is performed, the voltage signal at the positioning position can be switched by the button, and writing or erasing of the color on the liquid crystal display panel can be realized.
In practical implementation, in the writing device provided in the embodiment of the present invention, as shown in fig. 1 to 4, the first substrate 1 is located on a side of the second substrate 2 away from the electronic ink display panel 20, and the fourth substrate 6 is located on a side of the third substrate 5 away from the liquid crystal display panel 10;
the first substrate 1 is a flexible substrate and can realize press writing; the second substrate 2 and the third substrate 5 may be the same substrate, which may save the manufacturing of one substrate and reduce the thickness of the writing device. Of course, in practice, the second substrate 2 and the third substrate 5 may be separately provided.
In a specific implementation manner, in the writing device provided in the embodiment of the present invention, the first substrate, the second substrate, the third substrate, and the fourth substrate are all transparent substrates, and the first electrode, the second electrode, the third electrode, and the fourth electrode are all transparent conductive films.
In a specific implementation manner, in the writing device provided in the embodiment of the present invention, the writing positioning structure may include one or a combination of an infrared positioning structure, an inductive positioning structure, an ultrasonic positioning structure, an image positioning structure, or an electromagnetic positioning structure. The writing positioning structure can be used for positioning the writing track position and the writing track local erasing position. For example, when the color of the electronic ink display panel needs to be displayed, the thinner infrared handwriting can be used for positioning; when the color of the electronic ink display panel needs to be erased, infrared positioning with a larger area can be used.
Specifically, taking the writing positioning structure as an infrared positioning structure as an example, as shown in fig. 6, the writing device includes a writing area AA and a non-writing area BB surrounding the writing area AA, and fig. 1 to 4 of the present invention are structures located in the writing area AA; the infrared positioning structure comprises a plurality of transmitting units 100 and a plurality of receiving units 200 which are arranged in a non-writing area BB, the transmitting units 100 and the receiving units 200 are correspondingly arranged around a writing area AA, and the transmitting units 100 and the receiving units 200 are in one-to-one correspondence. The method for calculating the relative position of the pen in the writing area AA is the same as the prior art and will not be described in detail here.
In practical implementation, the writing device provided by the embodiment of the invention further comprises a storage structure, and the storage structure is configured to store electronic display contents imported in advance or store writing track information of the writing tool on the surface of the liquid crystal display panel. For example, the electronic display content imported in advance may be a pattern of a black-background green word to be displayed, and when it is determined that a specific display area needs to display the electronic display content imported in advance, the second electrode structure corresponding to the display area is controlled to apply a voltage to generate a third set electric field, so that the black charged particles corresponding to the display area move to a side close to the liquid crystal display panel, and the first electrode structure corresponding to the display area is controlled to apply a voltage to generate a first set electric field, so that the liquid crystal display panel displays green. The writing trace information of the writing tool on the surface of the liquid crystal display panel is stored, for example, when writing, the writing trace information is directly recorded and stored according to the position of the writing trace.
In a specific implementation, in the writing device provided in the embodiment of the present invention, the resolution of the liquid crystal display panel may be the same as or different from the resolution of the electronic ink display panel. When the resolution ratio of the liquid crystal display panel is the same as that of the electronic ink display panel, the first display area corresponds to the second display area one by one; when the resolution of the liquid crystal display panel is different from that of the electronic ink display panel, since the liquid crystal display panel is mainly used for writing and the electronic ink display panel is mainly used as a mark, the resolution of the electronic ink display panel can be smaller than that of the liquid crystal display panel, that is, one second display region corresponds to a plurality of first display regions.
In specific implementation, the writing device provided by the embodiment of the invention can be: the writing board, the light energy liquid crystal writing board, the light energy large liquid crystal writing blackboard, the light energy dust-free writing board, the light energy portable blackboard, the electronic drawing board, the electronic writing board, the electronic notepad, the doodle board, the children writing board, the children doodle drawing board, the eraser function sketch board, the liquid crystal electronic drawing board, the color liquid crystal writing board and the like.
The following describes in detail the display principle of the writing instrument provided by the embodiment of the present invention by the display method of the writing instrument provided by the embodiment of the present invention:
based on the same inventive concept, an embodiment of the present invention further provides a display method of the writing apparatus, including:
when the received control signal determines that the electronic ink display panel is in the first color writing mode, for example, when the writing track is supposed to present green reflected by the liquid crystal display panel, the control unit is configured to apply a set voltage to all the second conductive structures in the electronic ink display panel to generate a corresponding third set electric field, that is, the set voltage is applied to all the second conductive structures to generate the third set electric field so that the black charged particles move to a side close to the liquid crystal display panel, so that the charged particles (black charged particles) displaying the base color move to a side close to the liquid crystal display panel, and the electronic ink display panel displays black; at this time, in response to the writing track of the writing tool on the surface of the liquid crystal display panel, that is, the position of the writing track is determined, the bistable liquid crystal molecules at the position corresponding to the writing track are controlled to reflect light of a first color under the action of pressure or a first set electric field, for example, pressure writing is performed at the position corresponding to the writing track or a set voltage is applied to a first conductive structure corresponding to the position corresponding to the writing track to generate a first set electric field to realize the color reflected by the liquid crystal display panel at the writing track, and meanwhile, the set voltage is applied to a first conductive structure corresponding to the position not corresponding to the writing track to generate a second set electric field to make the bistable liquid crystal molecules at the position not corresponding to the writing track in a scattering state, that is, black is displayed at the;
when the received control signal is responded to determine that the color display panel is in a first color all-erasing mode, namely when the color reflected by the liquid crystal display panel is wanted to be erased completely, all first conductive structures in the liquid crystal display panel are controlled to generate a second set electric field, namely set voltage is applied to all the first conductive structures to generate a second set electric field so as to control bistable liquid crystal molecules to be switched to be in a scattering state and realize the color reflected by the liquid crystal display panel to be erased completely;
when the writing track is determined to be in the second color writing mode in response to the received control signal, for example, when the writing track is intended to present the color of the electronic ink display panel, the writing track of the writing tool on the surface of the liquid crystal display panel is determined in response to the writing positioning structure, that is, the position of the writing track is determined by the writing positioning structure, and the second conductive structure at the position corresponding to the writing track is controlled to generate a set electric field, so that the charged particles of the second color in the microcapsule move to the side close to the liquid crystal display panel; for example, when the writing track is made to appear red on the electronic ink display panel, a fifth set electric field is generated by applying a set voltage to the second conductive structure at a position corresponding to the writing track, so that the red charged particles in the microcapsule move to a side close to the liquid crystal display panel; for example, when the writing track is supposed to be white of the electronic ink display panel, a fourth set electric field is generated by applying a set voltage to the second conductive structure at the position corresponding to the writing track, so that the white charged particles in the microcapsule move to the side close to the liquid crystal display panel;
when the control signal is received to determine that the electronic ink display panel is in the second color all-erasing mode, all the second conductive structures in the electronic ink display panel are controlled to generate a set electric field, so that the charged particles of the base color in the microcapsules move to the side close to the liquid crystal display panel; for example, when the red and white displayed on the electronic ink display panel are to be erased completely, a third set electric field is generated by applying a set voltage to all the second conductive structures in the electronic ink display panel, so that all the black charged particles move to the side close to the liquid crystal display panel.
The display method of the writing device provided by the embodiment of the invention can realize writing handwriting with different colors, the display of the colors is not influenced by writing positions, the writing with different colors is not interfered with each other, the problem of uneven colors is avoided, and the local erasing with different colors is also not interfered with each other; the invention overcomes the defect that the traditional writing equipment can only display a single color, is convenient to add or delete the annotations with different colors at any time in the writing process, and improves the experience degree of users.
In specific implementation, in the display method provided in the embodiment of the present invention, the method further includes:
in a second color writing mode, namely only the color displayed by the electronic ink display panel is displayed, when a writing tool writes on the liquid crystal display panel by pressure, the color reflected by the liquid crystal display panel is displayed at the same time, so that the writing track position of the writing tool on the surface of the liquid crystal display panel is determined in response to the writing positioning structure, and meanwhile, the first conductive structure at the position corresponding to the writing track is controlled to generate a set electric field, namely, a set voltage is applied to the first conductive structure in the liquid crystal display panel corresponding to the determined writing track position to generate a second set electric field, so that the bistable liquid crystal molecules are kept in a scattering state, namely, the color on the liquid crystal display panel is locally erased.
In specific implementation, in the display method provided in the embodiment of the present invention, the method further includes:
when the writing track at the local position on the liquid crystal display panel is determined to be in the first color local erasing mode in response to the received control signal, the writing track of the writing tool on the surface of the liquid crystal display panel determined by the writing positioning structure is responded, only the set voltage applied to the first conductive structure at the position corresponding to the writing track is controlled to generate a second set electric field, so that the bistable liquid crystal molecules are controlled to be switched to be in the scattering state, and the local erasing of the display color of the liquid crystal display panel can be realized.
In specific implementation, in the display method provided in the embodiment of the present invention, the method further includes:
when the writing track at the local position on the electronic ink display panel is erased in response to the received control signal, the second conductive structure at the position corresponding to the writing track is controlled to generate a set electric field in response to the writing track of the writing tool on the surface of the liquid crystal display panel, which is determined by the writing positioning structure, so that the charged particles of the base color in the microcapsule move to the side close to the liquid crystal display panel; for example, when a red writing track on the liquid crystal display panel is to be erased, the second conductive structure corresponding to the writing track position is controlled to apply a set voltage to generate a third set electric field, so that the black charged particles corresponding to the writing track position move to a side close to the liquid crystal display panel to display black, and thus, the local erasing of the second color is realized.
In specific implementation, in the display method provided in the embodiment of the present invention, the method further includes: in the second color local erasing mode, for example, when it is desired to erase red color displayed on the electronic ink display panel, the writing tool performs pressure writing on the surface of the liquid crystal display panel, and therefore, in response to the writing trace of the writing tool on the surface of the liquid crystal display panel determined by the writing positioning structure, it is necessary to simultaneously control the application of a set voltage to the first conductive structure at the position corresponding to the writing trace to generate a second set electric field, so as to maintain the bistable liquid crystal molecules in a scattering state.
In specific implementation, in the display method provided in the embodiment of the present invention, the method further includes:
and when the control signal is responded to determine that the liquid crystal display panel is in an all-color all-erasing mode, namely all colors displayed on the liquid crystal display panel are erased, namely the colors are cleared, the control unit controls to apply a set voltage to all the first conductive structures in the liquid crystal display panel to generate a second set electric field so as to control the bistable liquid crystal molecules to be switched to a scattering state, and controls to apply a set voltage to all the second conductive structures in the electronic ink display panel to generate a third set electric field so as to enable the charged particles (black charged particles) of the base color in the microcapsule to move to the side close to the liquid crystal display panel.
It should be noted that the all-color erase mode may be cleared after the computer is turned on or cleared before the computer is turned off.
In specific implementation, in the display method provided in the embodiment of the present invention, the method further includes:
storing writing track information of a writing tool on the surface of the liquid crystal display panel in a storage structure;
and controlling the writing device to display the stored content in response to the instruction for calling the stored content in the storage structure. For example: when the writing track displaying the first color needs to be called, a set voltage is controlled to be applied to a first conductive structure corresponding to the writing track position in the liquid crystal display panel to generate a first set electric field, so that the writing track information of the first color is called; when the writing track displaying the second color needs to be called, a set voltage is applied to a second conductive structure corresponding to the writing track position in the electronic ink display panel to generate a fourth set electric field or a fifth set electric field, so that the charged particles of the second color in the microcapsule move to one side close to the liquid crystal display panel, and the writing track information of the second color is called; when the writing tracks displaying the first color and the second color need to be called, the preset voltage is controlled to be applied to the first conductive structure corresponding to the writing track position in the liquid crystal display panel to generate a first preset electric field so as to call the writing track information of the first color, and the preset voltage is controlled to be applied to the second conductive structure corresponding to the writing track position in the electronic ink display panel to generate a fourth preset electric field or a fifth preset electric field so that the charged particles of the second color in the microcapsule move to the side close to the liquid crystal display panel so as to call the writing track information of the second color.
According to the writing device and the display method thereof provided by the embodiment of the invention, writing chirographs with different colors can be realized, the color display is not influenced by the writing position, the writing with different colors is not interfered with each other, the problem of uneven color is avoided, and meanwhile, the local erasing with different colors is also not interfered with each other; the invention overcomes the defect that the traditional writing equipment can only display a single color, is convenient to add or delete the annotations with different colors at any time in the writing process, and improves the experience degree of users.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.

Claims (15)

1. A writing device is characterized by comprising a liquid crystal display panel and an electronic ink display panel which are arranged in a stacked mode, and a writing positioning structure, wherein the writing positioning structure is configured to determine writing track information of a writing tool on the surface of the liquid crystal display panel;
the liquid crystal display panel comprises a first substrate and a second substrate which are oppositely arranged, a plurality of first display areas are arranged between the first substrate and the second substrate, and each first display area comprises a first conductive structure and bistable liquid crystal molecules; the bistable liquid crystal molecules are configured to reflect light of a first color under the action of pressure or a first set electric field and are configured to be in a scattering state under the action of a second set electric field; the first conductive structure is configured to generate a first set electric field or a second set electric field in response to a received control signal to control the bistable liquid crystal molecules to switch between reflecting light of a first color and assuming a scattering state;
the electronic ink display panel comprises a third substrate and a fourth substrate which are oppositely arranged, a plurality of second display areas are arranged between the third substrate and the fourth substrate, and each second display area comprises a second conductive structure and an electronic ink structure; at least one microcapsule is distributed in the electronic ink structure, and charged particles of a substrate color and charged particles of a second color are encapsulated in the microcapsule; the second conductive structure is configured to generate a set electric field in response to a received control signal to move charged particles of a set color to a side close to the liquid crystal display panel.
2. A writing instrument as in claim 1, wherein said first color is different from said base color and said second color.
3. A writing instrument as recited in claim 1, wherein the first conductive structure comprises: a first electrode on a side of the first substrate facing the second substrate, and a second electrode on a side of the second substrate facing the first substrate; the bistable liquid crystal molecules are positioned between the first electrode and the second electrode; each first electrode forms a planar electrode arranged on the whole surface, and each second electrode is independent;
the second conductive structure includes: a third electrode on a side of the third substrate facing the fourth substrate, and a fourth electrode on a side of the fourth substrate facing the third substrate; the electronic ink structure is located between the third electrode and the fourth electrode; each of the third electrodes constitutes a planar electrode provided over the entire surface, and each of the fourth electrodes is independent of each other.
4. The writing instrument as recited in claim 1, wherein the first substrate is located on a side of the second substrate away from the electronic ink display panel, and the fourth substrate is located on a side of the third substrate away from the liquid crystal display panel;
the first substrate is a flexible substrate, and the second substrate and the third substrate are the same substrate.
5. The writing instrument as recited in claim 1, wherein said bistable liquid crystal molecules are in a focal conic texture under non-pressure and in a planar texture under pressure; and the bistable liquid crystal molecules are switched between focal conic texture and planar texture under the action of the first set electric field and the second set electric field;
the charged particles of the base color are black charged particles, and the charged particles of the second color include one or a combination of white charged particles and red charged particles.
6. The writing instrument of claim 1, wherein the writing positioning structure comprises one or a combination of an infrared positioning structure, an inductive positioning structure, an ultrasonic positioning structure, an image positioning structure, or an electromagnetic positioning structure.
7. The writing apparatus of claim 1, further comprising a storage structure configured to store electronic display content imported in advance or to store writing trajectory information of a writing instrument on the surface of the liquid crystal display panel.
8. The writing apparatus of claim 1, wherein the first display regions correspond to the second display regions one-to-one, or one of the second display regions corresponds to a plurality of the first display regions.
9. A display method of a writing apparatus according to any one of claims 1 to 8, comprising:
when the received control signal is used for determining that the electronic ink display panel is in a first color writing mode, controlling to apply a set voltage to all the second conductive structures in the electronic ink display panel to generate a corresponding third set electric field so that the charged particles displaying the substrate color move to the side close to the liquid crystal display panel; responding to a writing track of a writing tool on the surface of the liquid crystal display panel, reflecting light of a first color by the bistable liquid crystal molecules at a position corresponding to the writing track under the action of pressure or a first set electric field, and simultaneously controlling to apply a set voltage to the first conductive structure at a position of a non-writing track to generate a second set electric field so as to enable the bistable liquid crystal molecules at the position of the non-writing track to be in a scattering state;
when the bistable liquid crystal display panel is determined to be in a first color all-erasing mode in response to the received control signal, controlling all the first conductive structures in the liquid crystal display panel to generate a second set electric field so as to control the bistable liquid crystal molecules to be switched to be in a scattering state;
when the writing mode of the writing tool on the surface of the liquid crystal display panel is determined by the writing positioning structure in response to the received control signal, controlling a second conductive structure at a position corresponding to the writing track to generate a set electric field so that the charged particles of the second color in the microcapsule move to a side close to the liquid crystal display panel;
and when the control signal is received to determine that the electronic ink display panel is in a second color all-erasing mode, controlling all the second conductive structures in the electronic ink display panel to generate a third set electric field, so that the charged particles of the base color in the microcapsule move to the side close to the liquid crystal display panel.
10. The display method as claimed in claim 9, further comprising:
and in a second color writing mode, responding to the writing track of the writing tool on the surface of the liquid crystal display panel determined by the writing positioning structure, and simultaneously controlling the first conductive structure at the position corresponding to the writing track to generate a second set electric field so as to keep the bistable liquid crystal molecules in a scattering state.
11. The display method as claimed in claim 9, further comprising:
when the bistable liquid crystal display panel is determined to be in the first color local erasing mode in response to the received control signal, the writing track of a writing tool on the surface of the liquid crystal display panel is determined by the writing positioning structure, and the first conductive structure at the position corresponding to the writing track is controlled to generate a second set electric field so as to control the bistable liquid crystal molecules to be switched to be in the scattering state.
12. The display method as claimed in claim 9, further comprising:
and when the writing positioning structure determines that the writing track of the writing tool on the surface of the liquid crystal display panel is in the second color local erasing mode in response to the received control signal, controlling the second conductive structure at the position corresponding to the writing track to generate a third set electric field so that the charged particles of the base color in the microcapsule move to the side close to the liquid crystal display panel.
13. The display method as claimed in claim 12, further comprising: and under a second color local erasing mode, responding to the writing track of the writing tool on the surface of the liquid crystal display panel determined by the writing positioning structure, and simultaneously controlling the first conductive structure at the position corresponding to the writing track to generate a second set electric field so as to keep the bistable liquid crystal molecules in a scattering state.
14. The display method as claimed in claim 9, further comprising:
and when the control signal is received to determine that the liquid crystal display panel is in the all-color all-erasing mode, controlling all the first conductive structures in the liquid crystal display panel to generate a second set electric field so as to control the bistable liquid crystal molecules to be switched to be in a scattering state, and simultaneously controlling all the second conductive structures in the electronic ink display panel to generate a third set electric field so that the charged particles of the base color in the microcapsule move to a side close to the liquid crystal display panel.
15. The display method as claimed in claim 9, further comprising:
storing writing track information of the writing tool on the surface of the liquid crystal display panel in the storage structure;
and controlling the writing device to display the stored content in response to an instruction for calling the stored content in the storage structure.
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CN117234011A (en) * 2023-09-21 2023-12-15 北京悦米科技有限公司 Consumable-free maintenance-free liquid crystal handwriting board with self-generating function and use method thereof

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