CN112904606B - Bistable liquid crystal writing device with quick electric driving display function and method - Google Patents

Bistable liquid crystal writing device with quick electric driving display function and method Download PDF

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Publication number
CN112904606B
CN112904606B CN202110196914.XA CN202110196914A CN112904606B CN 112904606 B CN112904606 B CN 112904606B CN 202110196914 A CN202110196914 A CN 202110196914A CN 112904606 B CN112904606 B CN 112904606B
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display
control
liquid crystal
writing
input
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CN112904606A (en
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李清波
杨猛训
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Shandong Lanbeisite Educational Equipment Group
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Shandong Lanbeisite Educational Equipment Group
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    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/13306—Circuit arrangements or driving methods for the control of single 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
    • G02F1/134309—Electrodes characterised by their geometrical arrangement
    • 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
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/0412—Digitisers structurally integrated in a display
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/0416—Control or interface arrangements specially adapted for digitisers

Abstract

The invention discloses a bistable liquid crystal writing device with a quick electric drive display function and a method thereof, wherein the bistable liquid crystal writing device comprises: a conductive layer, a liquid crystal layer, and a base layer; the base layer includes: the pixel electrodes are arranged in an array shape, and each pixel electrode is correspondingly connected with one switch element group; the switching element group comprises two or more switching elements, wherein each switching element is provided with an input end, an output end and a control end, the output ends of all the switching elements in each switching element group are connected, and the output ends of the switching elements as the switching element group are connected with the pixel electrodes; the control end of each row of pixel electrodes corresponding to the switch element is connected with a control lead; the input end of the switch element corresponding to each row of pixel electrode is connected with two or more than two input leads according to the control requirement and the set rule, and the input ends of different switch elements of each row of single switch element group are connected with different input leads; the invention greatly shortens the display time of the picture and improves the display speed.

Description

Bistable liquid crystal writing device with quick electric driving display function and method
Technical Field
The invention relates to the technical field of bistable liquid crystal writing boards, in particular to a bistable liquid crystal writing device with a quick electric drive display function and a method thereof.
Background
Currently, in the field of liquid crystal writing display, there are four conventional technologies:
the first is a touch display screen (LCD or LED or OLED, etc.), which can realize writing/displaying function only when being powered on, and can not write/display when being powered off; the display of the device depends on the backlight or the self-luminous device arranged in the device, so that the device has certain harm to the eyesight of a user and is easy to cause visual fatigue after being used for a long time; an input signal pressure detection device and a track detection device are additionally added for writing, and an electromagnetic pen or a capacitive pen or a finger of a capacitive screen is relied on, and the writing pressure of the electromagnetic pen or the capacitive pen or the contact area of the finger and the screen is detected to generate an electric signal to drive the change of the display state of liquid crystal molecules so as to realize simulated writing; the handwriting is not written by pressure, and the real writing feeling and writing effect cannot be restored;
the second one is electronic paper/electronic ink, the interior of which is polar material, and the writing display is realized by reflecting external light source, and the writing can be still maintained after power off; however, writing can be realized only in a power-on state, and the writing of the pen is not realized by pressure, so that the real writing feeling and writing effect cannot be restored; meanwhile, an input signal pressure detection device and a track detection device are additionally added for writing, and an electromagnetic pen or a capacitive pen or a finger of a capacitive screen is used for detecting the writing pressure of the electromagnetic pen or the capacitive pen or the contact area of the finger and the screen to generate an electric signal so as to drive the change of the display state of liquid crystal molecules to realize simulated writing; the real writing feeling and writing effect cannot be restored without using pressure for writing;
the third is a bistable liquid crystal display device, which has a conventional driving method including:
(1) according to the content to be displayed, the liquid crystal state corresponding to the pixel electrode is set to be a display state in a line-by-line scanning mode, and the content is displayed; however, due to the slow response speed of the bistable liquid crystal, the time required for realizing display in the driving mode is too long, the updating speed of display content is slow, and particularly, when a dynamic image is displayed, the time delay phenomenon is obvious and the visual experience is poor;
(2) driving areas corresponding to all pixel electrodes into a display state through voltage, and then driving the areas corresponding to the set pixel electrodes into an erasing state through voltage in a progressive scanning mode according to contents to be displayed so as to display the contents; although this method is improved in the display content update speed compared with the method (1), the display effect is affected by all the previous erasures, which brings about a bad visual experience;
(3) driving liquid crystals corresponding to a single row or multiple rows of pixel electrodes into a display state by voltage, and driving the liquid crystals corresponding to the set pixel electrodes into an erasing state by voltage in a progressive scanning mode according to contents to be displayed to realize the display of the contents; this method requires a time between the methods (1) and (2), but still does not satisfy the requirement of the bistable liquid crystal writing device for fast display.
The fourth is a bistable liquid crystal pressure writing device, which comprises a first PET conductive layer, a liquid crystal layer and a second PET conductive layer which are arranged in sequence; the working principle is that the bistable characteristic of liquid crystal is utilized to realize pressure writing display; for example, cholesteric liquid crystal is used as a liquid crystal layer, the liquid crystal state of a pressed part is changed by applying pressure to a writing area, and a writing pressure track is recorded, so that corresponding writing content is displayed, the real writing feeling and writing effect can be restored, images can be stored without power consumption, and more power is saved; the high-quality image still kept under direct sunlight can be used under strong light; and the visual angle is wide, so that the user can see the picture from any angle. However, the liquid crystal writing device can present writing contents only by pressure writing as a writing interface, and cannot realize electric signal driving display.
Disclosure of Invention
In order to solve the problems, the invention provides a bistable liquid crystal writing device with a rapid electric driving display function and a method thereof, which can realize pressure writing display, simultaneously have a voltage driving display function, and simultaneously have short time required by the display process, thereby improving the display effect and the visual experience.
In order to achieve the above object, according to a first aspect of the present invention, there is disclosed an electrically-driven liquid crystal writing display device comprising: a conductive layer, a liquid crystal layer, and a base layer; the base layer includes:
the pixel electrodes are arranged in an array shape, and each pixel electrode is correspondingly connected with one switch element group;
the switch element group comprises at least two switch elements, wherein each switch element is provided with an input end, an output end and a control end, and the output ends of all the switch elements in each switch element group are connected to be used as the output ends of the switch element group;
the control end of each row of pixel electrodes corresponding to the switch element is connected with a control lead; the input end of the switch element corresponding to each row of pixel electrode is connected with two or more than two input leads according to the control requirement and the set rule, and the input ends of different switch elements of each row of single switch element group are connected with different input leads;
the rows and columns may be interchanged.
According to a second aspect of the present invention, there is disclosed an electrically driven liquid crystal writing display device, comprising: a conductive layer, a liquid crystal layer, and a base layer; the base layer includes:
the pixel electrodes are arranged in an array shape, and each pixel electrode is correspondingly connected with one switch element group;
the switching element group comprises two or more switching elements, wherein each switching element is provided with an input end, an output end and a control end, the output ends of all the switching elements in each switching element group are connected, and the output ends of the switching elements as the switching element group are connected with the pixel electrodes;
the control end of each row of pixel electrodes corresponding to the switch element is connected with two or more than two control leads according to the control requirement and the set rule, and the switch elements in each row of single switch element group are respectively connected with different control leads; the input end of the switch element corresponding to each row of pixel electrode is connected with two or more than two input leads according to the control requirement and the set rule, and different switch elements in each row of single switch element group are connected with different input leads;
the rows and columns may be interchanged.
According to a third aspect of the present invention, there is disclosed an electrically driven liquid crystal writing display method comprising:
the control unit is configured to control the voltages input to the control lead and the input lead so as to simultaneously control the set areas corresponding to the at least two rows of pixel electrodes to be in a display state and realize quick display;
alternatively, the first and second electrodes may be,
further comprising: a control unit configured to control voltages input to the control wire and the input wire to control the set target area to be in a display state; then, simultaneously controlling the set areas corresponding to at least two rows of pixel electrodes in the target area to be in an erasing state every time, and realizing rapid display;
alternatively, the first and second electrodes may be,
further comprising: and the control unit is configured to control the voltages input to the control lead and the input lead so as to control the set first target area to be in a display state and control the set second target area to be in an erasing state at the same time, thereby realizing quick display.
According to a fourth aspect of the present invention, there is disclosed a bistable liquid crystal writing device having a fast electric drive display function, comprising: the electrically-driven liquid crystal writing display device described above; or, the electric-drive liquid crystal writing display method is adopted to realize rapid electric-drive display; the liquid crystal layer is a bistable liquid crystal capable of realizing pressure writing display.
According to a fifth aspect of the present invention, there is disclosed a liquid crystal writing display comprising: the electrically-driven liquid crystal writing display device described above; or, the electric drive liquid crystal writing display method is adopted to realize rapid electric drive display.
According to a sixth aspect of the present invention, there is disclosed an electronic paper/electronic ink having a fast electrically driven display function, comprising: the conductive layer, the polar material layer and the substrate layer are arranged in sequence; the base layer includes:
the pixel electrodes are arranged in an array shape, and each pixel electrode is correspondingly connected with one switch element group;
the switch element group comprises at least two switch elements, wherein each switch element is provided with an input end, an output end and a control end, and the output ends of all the switch elements in each switch element group are connected to be used as the output ends of the switch element group;
the control end of each row of pixel electrodes corresponding to the switch element is connected with a control lead; the input end of the switch element corresponding to each row of pixel electrode is connected with two or more than two input leads according to the control requirement and the set rule, and the input ends of different switch elements of each row of single switch element group are connected with different input leads;
the rows and columns may be interchanged.
Alternatively, an electronic paper/electronic ink having a fast electrically driven display function includes: a conductive layer, a liquid crystal layer, and a base layer; the base layer includes:
the pixel electrodes are arranged in an array shape, and each pixel electrode is correspondingly connected with one switch element group;
the switch element group comprises at least two switch elements, wherein each switch element is provided with an input end, an output end and a control end, and the output ends of all the switch elements in each switch element group are connected to be used as the output ends of the switch element group;
the control end of each row of pixel electrodes corresponding to the switch elements is connected with two or more than two control leads according to the control requirement and the set rule, and the control ends of different switch elements in each row of single switch element group are respectively connected with different control leads; the input end of the switch element corresponding to each row of pixel electrode is connected with two or more than two input leads according to the control requirement and the set rule, and the input ends of different switch elements in each row of single switch element group are connected with different input leads;
the rows and columns may be interchanged.
According to a seventh aspect of the present invention, there is disclosed an electronic schoolbag, comprising: the bistable liquid crystal writing device with the quick electric drive display function; the bistable liquid crystal writing device with the rapid electric drive display function is provided with:
the display control module is configured to select display content and perform electric drive display at a set position of the liquid crystal writing device;
the writing control module is configured to be used for realizing writing at a set position on the liquid crystal writing device;
the erasing control module is configured to erase the content of the set position on the liquid crystal writing device;
the data transmission module is configured to be used for realizing data transmission between the liquid crystal writing device and other terminal equipment;
the data storage module is configured to be used for storing the set writing or display content;
alternatively, the first and second electrodes may be,
including the electronic paper/electronic ink described above;
the electronic paper/electronic ink is provided with:
the display control module is configured to be used for selecting display content and performing electric drive display at a set position of the electronic paper/electronic ink;
the writing control module is configured to be used for realizing writing at a set position on the electronic paper/electronic ink;
the erasing control module is configured to erase the content of the set position on the electronic paper/electronic ink;
the data transmission module is configured to be used for realizing data transmission between the electronic paper/electronic ink and other terminal equipment;
and the data storage module is configured to be used for realizing the storage of the set writing or display content.
According to an eighth aspect of the present invention, there is disclosed a liquid crystal large panel comprising: the bistable liquid crystal writing device with the quick electric drive display function; the bistable liquid crystal writing device with the rapid electric drive display function is provided with:
the display control module is configured to select display content and perform electric drive display at a set position of the liquid crystal writing device;
the writing control module is configured to be used for realizing writing at a set position on the liquid crystal writing device;
the erasing control module is configured to erase the content of the set position on the liquid crystal writing device;
the data transmission module is configured to be used for realizing data transmission between the liquid crystal writing device and other terminal equipment;
the data storage module is configured to be used for storing the set writing or display content;
alternatively, the first and second electrodes may be,
including the electronic paper/electronic ink described above;
the electronic paper/electronic ink is provided with:
the display control module is configured to be used for selecting display content and performing electric drive display at a set position of the electronic paper/electronic ink;
the writing control module is configured to be used for realizing writing at a set position on the electronic paper/electronic ink;
the erasing control module is configured to erase the content of the set position on the electronic paper/electronic ink;
the data transmission module is configured to be used for realizing data transmission between the electronic paper/electronic ink and other terminal equipment;
and the data storage module is configured to be used for realizing the storage of the set writing or display content.
According to a ninth aspect of the present invention, there is disclosed a smart classroom comprising: the electronic schoolbag, the liquid crystal large screen and the teacher terminal are arranged; the electronic schoolbag, the liquid crystal large screen and the teacher terminal are communicated with each other; the display or writing content on the electronic schoolbag can be transmitted and/or displayed on a teacher terminal/a liquid crystal large screen.
Compared with the prior art, the invention has the beneficial effects that:
(1) the liquid crystal writing device can realize writing display through pressure, restore the real writing feeling, fully embody the writing force and the writing track and have more real writing effect; meanwhile, power supply is not needed in the writing process and the static display, and no time delay is caused in writing;
meanwhile, the invention can also realize the voltage drive display of the set content in a voltage drive mode; therefore, a user can directly display some complex contents such as formulas or diagrams on the liquid crystal writing device without writing by himself, a large amount of writing time is saved, writing efficiency is improved, and written contents are better presented; and the contents such as book data, pictures, animation, video and the like can also be played.
(2) Each pixel electrode is connected with at least two switching elements which are connected in parallel, and the content of two rows or two columns can be displayed at least simultaneously in the voltage driving display process; or, firstly, controlling the area corresponding to the pixel electrodes in the set row or column to be in a display state, and then, simultaneously controlling the set area in the area corresponding to the pixel electrodes in at least two rows or two columns to be in an erasing state according to the content to be displayed; compared with the progressive scanning driving display introduced in the background technology, or the driving mode of firstly setting the line number display and then executing the set erasing action line by line, the process greatly shortens the display time of the picture and improves the content updating speed.
(3) The technology of the invention is also suitable for electronic paper/electronic ink, can solve the problem of low display speed and obviously improves the display speed.
(4) The technology of the invention is also suitable for the common TFT display large screen, and further improves the display speed.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the application and, together with the description, serve to explain the application and are not intended to limit the application.
FIG. 1 is a schematic view of an electrically driven liquid crystal writing display device disclosed in an embodiment of the present invention;
FIG. 2 is a schematic diagram of a circuit configuration on a substrate layer of an electrically driven liquid crystal writing display device disclosed in an embodiment of the present invention;
FIG. 3(a) is a schematic diagram of a parallel connection structure of two switching elements according to an embodiment of the present invention;
FIG. 3(b) is a schematic diagram of a parallel configuration of two switching elements with storage capacitors according to an embodiment of the present invention;
FIG. 3(c) is a schematic diagram of the connection of two switch elements in the switch element set according to the embodiment of the present invention;
FIG. 4(a) is a schematic diagram of a parallel connection structure of three switching elements according to an embodiment of the present invention;
FIG. 4(b) is a schematic diagram of a parallel connection structure of three switching elements with storage capacitors according to an embodiment of the present invention;
FIG. 5 is a diagram illustrating a first voltage control method according to a second embodiment of the present invention;
FIGS. 6(a) and 6(b) are schematic diagrams illustrating a second voltage control method according to a second embodiment of the present invention;
FIG. 7 is a diagram illustrating a third exemplary embodiment of voltage control;
FIG. 8(a) is a schematic diagram of a circuit configuration on a substrate layer of another electrically-driven liquid crystal writing display device disclosed in an embodiment of the present invention;
FIG. 8(b) is a schematic wiring diagram of two switch elements in the switch element group in FIG. 8 (a);
FIG. 9 is a diagram illustrating a first voltage control method according to a fifth embodiment of the present invention;
FIGS. 10(a) - (c) are schematic diagrams illustrating a second voltage control method according to a fifth embodiment of the present invention;
fig. 11 is a schematic diagram of a third voltage control method according to a fifth embodiment of the present invention.
Detailed Description
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
Example one
According to an embodiment of the present invention, there is disclosed an electrically-driven liquid crystal writing display device, referring to fig. 1, including: a conductive layer, a liquid crystal layer, and a base layer;
wherein the base layer comprises:
the pixel electrodes are arranged in an array shape, and each pixel electrode is correspondingly connected with one switch element group;
the switch element group comprises at least two switch elements, wherein each switch element is provided with an input end, an output end and a control end, and the output ends of all the switch elements in each switch element group are connected to be used as the output ends of the switch element group;
the control end of each row of pixel electrodes corresponding to the switch element is connected with a control lead; the input end of the switch element corresponding to each row of pixel electrode is connected with two or more than two input leads according to the control requirement and the set rule, and the input ends of different switch elements in each row of single switch element group are connected with different input leads; the number of input conductors may be determined according to the number of switching elements connected in parallel within the switching element group.
The rows and columns may be interchanged.
In this embodiment, the switching element may be a thin film transistor TFT, or may be any one of a MOSFET, an IGBT, or a bipolar switching tube, or a combination of the switching elements.
The control wires and the input wires are arranged crosswise, and the pixel electrodes are located at the crossing positions.
Specifically, referring to fig. 2, the structure of this embodiment is described by taking an example in which each switching element group is connected in parallel with two switching elements, and the switching elements are thin film transistors TFT; fig. 3(a) shows a schematic diagram of a structure in which two switching elements are connected in parallel; in fig. 3(a), the first plate represents the pixel electrode area corresponding to each or some adjacent pixel electrodes on the base layer; the second plate represents the conductive layer.
FIG. 3(c) is a schematic diagram showing the wiring of two switching elements in the switching element group according to the embodiment of the present invention;
referring to fig. 3(c), all the switching element gates of each row of pixel electrodes are connected to the same control wire (G1, G2, …) according to the layout of the pixel electrodes;
of course, each row of pixel electrodes may be divided into several groups, and the gates of all the switching elements in each group are connected to the same control lead.
Two input leads S11, S12 (taking the first column as an example) are respectively arranged along each column of the pixel electrode array, the sources of the switching elements connected with all the pixel electrodes of the column are connected to the two input leads S11, S12 corresponding to the column, and the sources of the two switching elements connected with the same pixel electrode are respectively connected to different input leads; for example, in each switching element group, the source of the first switching element is connected to the input conductive line S11, and the source of the second switching element is connected to the input conductive line S12; the specific connection of the switching element to the input conductor is within the discretion of the skilled person.
The rows and columns are interchangeable according to the actual need, i.e. the control conductors are arranged in columns and the input conductors in rows.
For each pixel electrode, the gate of each switching element is provided with a turn-on control voltage through a control wire, and the source of each switching element is provided with an input voltage through an input wire.
The control voltage and the input voltage input to each switching element are reasonably controlled, and the set switching elements can be controlled to be conducted and apply the set voltage to the pixel electrodes; the voltage difference formed between the voltage and the voltage applied by the conductive layer can enable the area corresponding to the pixel electrode to be in a display state, an erasing state or to be kept unchanged.
As an alternative embodiment, referring to fig. 3(b), after at least two switching elements are connected in parallel, the drains of the switching elements are further connected to an energy storage element, and an outgoing line of the energy storage element is connected to an electrode outgoing line of the conductive layer; the energy storage element can be charged when any one of the switching elements is conducted.
Since the conventional TFT circuit structures are all provided with the energy storage capacitor C1, the embodiment retains the energy storage capacitor; however, this should not be construed as limiting the scope of the present patent application, and in other embodiments, the energy storage capacitor may not be provided, but may be formed between the conductive layer and the substrate layer. The present embodiment does not consider the effect of parasitic capacitance generated by the circuit itself.
Of course, more switching elements may be connected in parallel in each switching element group, such as: fig. 4(a) - (b) show schematic structural diagrams of parallel connection of three switching elements. Based on the structures shown in fig. 3(a) -4 (b), a person skilled in the art can obtain a schematic diagram in which three or more switching elements are connected in parallel, and this embodiment is not illustrated.
In this embodiment, the base layer is a glass layer on which different circuit structures can be integrated by a semiconductor process. Such as: in some embodiments, the substrate layer further has integrated thereon:
the grid driving unit is used for providing required control voltage for the control lead;
and the source electrode driving unit is used for providing required input voltage for the input lead.
In some embodiments, electrode lines are respectively led out from the base layer and the conductive layer; is used for connecting a voltage driving circuit which can provide required voltage.
In other embodiments, the conductive particles are added into the frame glue, and the electrodes of the whole conductive layer are connected to the FPC golden fingers of the substrate layer, so that the electrode extraction of the whole module is extracted from the substrate layer, and the method is simpler and more stable than the original method of respectively extracting the electrodes from the conductive layer and the substrate layer.
In this embodiment, the electrically-driven liquid crystal writing display device further includes a control unit for controlling the electrically-driven liquid crystal writing display device to display in a set manner.
The control mode of the control unit specifically comprises:
the control unit is configured to control the voltages of the input control lead and the input lead so as to simultaneously control the set areas corresponding to the at least two rows of pixel electrodes to be in a display state; to achieve a fast display.
Alternatively, the first and second electrodes may be,
a control unit configured to control voltages input to the control wire and the input wire to control the set target area to be in a display state; then simultaneously controlling the set areas corresponding to at least two rows of pixel electrodes in the target area to be in an erasing state every time; to achieve a fast display.
Alternatively, the first and second electrodes may be,
and the control unit is configured to control the voltages input to the control lead and the input lead so as to control the set first target area to be in a display state and control the set second target area to be in an erasing state at the same time so as to realize quick display.
The first target area and the second target area are distributed according to rows, and the specific number of rows included in the second target area is determined according to the circuit structure on the substrate layer. For example, when each switching element group on the substrate layer includes two switching elements, the second target regions are all in one row; when each switch element group on the substrate layer contains three switch elements, the second target area can be two rows or one row; the same applies when each switching element group on the substrate layer includes three or more switching elements, and those skilled in the art can determine the number of rows of the second target region as needed.
Example two
According to the embodiment of the invention, the embodiment of the bistable liquid crystal writing device with the rapid electric driving display function comprises the electric driving liquid crystal writing display device disclosed in the first embodiment.
The liquid crystal layer is a bistable cholesteric liquid crystal that can be written by pressure. The liquid crystal can realize pressure writing display when receiving pressure; when the voltage difference between the conducting layer and a certain position of the substrate layer is a first set value, an erasing state can be presented; when the voltage difference between the conducting layer and a certain position of the substrate layer is a second set value, a display state can be presented; the specific values of the first set value and the second set value are determined according to the property of the bistable cholesteric liquid crystal.
Corresponding to the three control modes of the control unit in the first embodiment, the display control method of the bistable liquid crystal writing device includes three types, specifically including:
the first method comprises the following steps: controlling the voltage of the input control lead and the input lead to simultaneously control the set areas corresponding to at least two rows of pixel electrodes to be in a display state; to achieve a fast display.
And the second method comprises the following steps: controlling the voltage input to the control lead and the input lead so as to control the set target area to be in a display state; then simultaneously controlling the set areas corresponding to at least two rows of pixel electrodes in the target area to be in an erasing state every time; to achieve a fast display.
And the third is that: the voltage input to the control wire and the input wire is controlled to control the set first target area to be in a display state, and simultaneously control the set second target area to be in an erasing state, so as to realize rapid display.
Specifically, taking the circuit structure shown in fig. 2 as an example, two switching elements are connected in parallel to form a switching element group; the switching elements are TFTs, the switching elements of each row are connected with the same control lead, and the switching elements of each column are respectively connected with the corresponding first input lead and the second input lead; and, different switching elements in the same switching element group are connected to different input wires, respectively.
(1) For the first control method: and controlling the voltages input to the control lead and the input lead so as to simultaneously control the set areas corresponding to the two rows of pixel electrodes to be in a display state.
As shown in fig. 5, the voltage applied to the conductive layer is Vcom ═ 0V; for the first row or the second row which needs to be displayed, the voltage applied to the control conducting wire is 50V, for the pixel units which need to be displayed in the first row, the voltage applied to the source electrodes of the two switching elements is 40V respectively, and for the pixel units which do not need to be displayed in the first row, the voltage applied to the source electrodes of the two switching elements is 0V respectively; thus, in the first row:
the voltage loaded by the pixel electrode to be displayed is 40V, the voltage difference formed between the pixel electrode and the conducting layer is 40V, and the electric drive display of the area corresponding to the pixel electrode can be realized;
the voltage applied to the pixel electrode which does not require display is 0V, and the voltage difference between the pixel electrode and the conductive layer is 0V, so that the electric drive display of the region corresponding to the pixel electrode cannot be realized.
The same is true for the voltage application scheme in the second row.
And for the non-working row, the voltage applied to the first conducting wire is-10V, and then the two switching elements connected with the pixel electrodes in the row are both in an off state, and the state of the corresponding area of the pixel electrodes is maintained unchanged.
(2) For the second control method: controlling the voltage input to the control lead and the input lead so as to control the set target area to be in a display state; then simultaneously controlling the set areas corresponding to the two rows of pixel electrodes in the target area to be in an erasing state every time; to achieve a fast display.
Specific voltage control processes are shown in fig. 6(a) and 6 (b); a voltage Vcom applied to the conductive layer is 0V; referring to fig. 6(a), firstly, the target areas corresponding to the pixel electrodes with the set number of rows are controlled to be in a display state; for a row needing to be displayed, the voltage applied to the control conducting wire is 50V, the voltage applied to the source electrodes of the two switching elements corresponding to each pixel electrode in the row is 40V, at the moment, the voltage applied to each pixel electrode in the display row is 40V, the voltage difference formed between the conductive layer and the pixel electrode is 40V, and electric drive display of the area corresponding to the pixel electrodes can be achieved.
Then, simultaneously controlling the set areas corresponding to the two rows of pixel electrodes in the target area to be in an erasing state; refer to the voltage application method of fig. 6 (b).
For the first row needing erasing operation, the voltage applied by the control lead is 30V, the voltage applied by the source electrode of at least one switching element in the switching element group connected with the pixel electrode needing erasing in the row is 20V; the voltage applied by the two switching elements connected with the pixel electrodes which do not need to be erased in the row is 0V; the voltage applied by the conductive layer is still Vcom-0V;
thus, in this first row:
the voltage loaded on the pixel electrode to be erased is 20V, and the voltage difference formed between the pixel electrode and the conductive layer is 20V; the erasing state of the area corresponding to the pixel electrode can be realized;
the voltage loaded on the pixel electrode which does not need to be erased is 0V, and the voltage difference formed between the pixel electrode and the conducting layer is 0V, so that the state of the corresponding area of the pixel electrode can be kept unchanged;
the same is true for the voltage application scheme for the second row that needs to be erased.
For the non-working rows, i.e. the rows not subjected to the erasing operation, the voltage applied to the control wires is-10V, and the switching elements corresponding to these rows cannot be turned on, and the state of the pixel electrode corresponding region remains unchanged.
(3) For the third control method: the voltage input to the control wire and the input wire is controlled to control the set first target area to be in a display state, and simultaneously control the set second target area to be in an erasing state, so as to realize rapid display.
Specifically, the set area corresponding to the pixel electrode on the upper row is in an erasing state while the area corresponding to the pixel electrode on the current row is controlled to be in a displaying state; the display state of the corresponding area of one row of pixel electrodes is controlled in two rows of pixel electrodes, and the corresponding area of the previous row of pixel electrodes is controlled to be in an erasing state.
Referring to fig. 7, the voltage Vcom applied to the conductive layer is 0V;
for the row needing to be erased, the voltage applied by the control wire is 30V, and in the row:
in the pixel electrode needing to be erased, in the switch element group, the voltage applied to the source electrode of the first switch element is 20V, the voltage applied to the second switch element is 40V, then the first switch element is conducted, and the voltage applied to the pixel electrode is 20V; the voltage difference between the conductive layer and the conductive layer is 20V, and the area corresponding to the pixel can be erased.
The voltage applied to the source of the first switching element of the pixel electrode which does not need to be erased is 0V, the voltage applied to the source of the second switching element of the pixel electrode is 40V, the first switching element is conducted, and the voltage applied to the pixel electrode is 0V; the voltage difference between the conductive layer and the pixel is 0V, and the state of the corresponding area of the pixel is unchanged;
for the row needing to be displayed, the voltage applied by the control lead is 50V, the second switching tubes are all conducted in the row, the voltage loaded on each pixel electrode in the row is 40V, and the electric drive display of the area corresponding to the pixel electrodes can be realized.
Of course, if each switching element group is formed by connecting three switching elements in parallel, the voltages applied to the pixel electrodes in three rows can be simultaneously controlled so that the regions corresponding to different pixel electrodes are in a set state.
The larger the number of parallel switching elements in each switching element group, the larger the number of rows of pixel electrodes that can be simultaneously controlled.
Compared with the conventional progressive scanning driving display mode, or the driving mode of firstly setting the row number display and then executing the set erasing action row by row, the structural form of the embodiment can realize the simultaneous driving display of at least two rows, or the simultaneous execution of the set erasing action of one row or a plurality of rows, and the simultaneous execution of the erasing action of the other row or a plurality of rows, so that the display time of one frame of picture is greatly shortened, and the display speed is improved.
The bistable liquid crystal writing device with the rapid electric drive display function provided by the embodiment of the invention can be applied to a light energy writing board, a light energy liquid crystal writing board, a light energy large liquid crystal writing blackboard, a light energy dust-free writing board, a light energy portable blackboard, an electronic drawing board, an lcd electronic writing board, an electronic notebook, a doodle board, a children writing board, a children doodle drawing board, an eraser function rapid writing board, a liquid crystal electronic drawing board or a color liquid crystal writing board or other related products which can be known by a person skilled in the art.
EXAMPLE III
According to an embodiment of the invention, an embodiment of a liquid crystal writing display is disclosed, which comprises the electrically driven liquid crystal writing display device disclosed in the first embodiment.
The liquid crystal layer of the liquid crystal writing display is made of liquid crystal materials in the conventional liquid crystal writing display.
It should be noted that the control mode of the control unit specifically includes:
the control unit is configured to control the voltages of the input control lead and the input lead so as to simultaneously control the set areas corresponding to the at least two rows of pixel electrodes to be in a display state; to achieve a fast display.
Corresponding to the control mode of the control unit, the display method of the liquid crystal writing display specifically comprises the following steps:
controlling the voltage of the input control lead and the input lead to simultaneously control the set areas corresponding to at least two rows of pixel electrodes to be in a display state; to achieve a fast display.
Also taking the circuit structure shown in fig. 2 as an example, the specific voltage control process is shown in fig. 5, and the specific voltage application process has been described in detail in embodiment two, and is not described again here.
Although the display speed of the current liquid crystal writing display can meet the visual requirement of human eyes, on the basis, the rapid display of the liquid crystal writing display is realized, and for the liquid crystal writing display with the ultra-large screen, the resolution ratio of the liquid crystal writing display can be further improved and the display quality of pictures can be improved on the premise of meeting the visual requirement of human eyes.
Example four
According to an embodiment of the present invention, another electrically-driven liquid crystal writing display device is disclosed, referring to fig. 1, including: a conductive layer, a liquid crystal layer, and a base layer; the basal layer is provided with:
the pixel electrodes are arranged in an array shape, and each pixel electrode is correspondingly connected with one switch element group;
the switching element group comprises two or more switching elements, wherein each switching element is provided with an input end, an output end and a control end, the output ends of all the switching elements in each switching element group are connected, and the output ends of the switching elements as the switching element group are connected with the pixel electrodes;
the control end of each row of pixel electrodes corresponding to the switch element is connected with two or more than two control leads according to the control requirement and the set rule, and the switch elements in each row of single switch element group are respectively connected with different control leads; the input end of the switch element corresponding to each row of pixel electrode is connected with two or more than two input leads according to the control requirement and the set rule, and different switch elements in each row of single switch element group are connected with different input leads; the number of control conductors and input conductors may be determined in accordance with the number of switching elements connected in parallel within the switching element group.
The above-described rows and columns may be interchanged.
The difference between the structure of this embodiment and the structure disclosed in the first embodiment is that, in this embodiment, for each row of pixel electrodes, the control ends of the switches are respectively connected to the corresponding control wires, and different switch elements in the same switch element group are respectively connected to different control wires.
The rest of the structure is the same as that disclosed in the first embodiment, and is not described again.
The control mode of the control unit is also the same as the control mode disclosed in the first embodiment, and is not described again.
However, due to the change of the connection structure of the control terminal of the switching element, the voltage applying method for implementing the above control method is different, which is described in detail in the fifth embodiment.
It should be noted that, in this embodiment, the control end of the pixel electrode in each row corresponding to the switch element is connected to two or more control wires; the number of the specific control wires can be consistent with the number of the switch elements in the switch element group; of course, the number of the switching elements in the switching element group may also be more than the number of the control wires, and at this time, the input ends or the control ends of some switching elements in the switching element group are connected in parallel to be used as one switching element; such as: the switch element group is provided with 5 switch elements, 3 switch elements can be used as one group, and the other two switch elements can be used as one group; the input ends of the two are connected in parallel and connected with the same input lead; or the control ends are connected in parallel and connected with the same control wire.
The input end of each column of pixel electrode corresponding to the switch element is connected with two or more than two input leads; the number of the input leads is the same, and can be consistent with the number of the switch elements in the switch element group; the number of the switch elements in the switch element group may also be greater than the number of the control wires, and details are not repeated.
EXAMPLE five
According to the embodiment of the invention, an embodiment of a bistable liquid crystal writing device with a rapid electric driving display function is disclosed, which comprises the electric driving liquid crystal writing display device disclosed in the fourth embodiment.
The liquid crystal layer is the same as that in the second embodiment, and the description thereof is omitted.
Corresponding to the three control modes of the control unit in the fourth embodiment, the display control method of the bistable liquid crystal writing device also includes three types, specifically including:
the first method comprises the following steps: controlling the voltage of the input control lead and the input lead to simultaneously control the set areas corresponding to at least two rows of pixel electrodes to be in a display state; to achieve a fast display.
And the second method comprises the following steps: controlling the voltage input to the control lead and the input lead so as to control the set target area to be in a display state; then simultaneously controlling the set areas corresponding to at least two rows of pixel electrodes in the target area to be in an erasing state every time; to achieve a fast display.
And the third is that: the voltage input to the control wire and the input wire is controlled to control the set first target area to be in a display state, and simultaneously control the set second target area to be in an erasing state, so as to realize rapid display.
Specifically, taking the circuit structure shown in fig. 8(a) as an example, two switching elements are connected in parallel to form a switching element group; the switching element is a TFT. Referring to fig. 8(b), the switching elements in each row are respectively connected to the corresponding first control wires and second control wires, and different switching elements in the same switching element group are respectively connected to different control wires; the switching elements of each column are connected to the corresponding first and second input conductors, respectively, and different switching elements in the same switching element group are connected to different input conductors, respectively.
(1) For the first control method: and controlling the voltages input to the control lead and the input lead so as to simultaneously control the set areas corresponding to the two rows of pixel electrodes to be in a display state.
As shown in fig. 9, the voltage Vcom applied to the conductive layer is 0V; for a first row or a second row which needs to be displayed, the grid voltages of two switches in each pixel electrode are both 50V, for a pixel unit which needs to be displayed in the first row, the voltages applied to the sources of the two switching elements are respectively 40V, and for a pixel unit which does not need to be displayed in the first row, the voltages applied to the sources of the two switching elements are respectively 0V; thus, in the first row:
the voltage loaded by the pixel electrode to be displayed is 40V, the voltage difference formed between the pixel electrode and the conducting layer is 40V, and the electric drive display of the area corresponding to the pixel electrode can be realized;
the voltage applied to the pixel electrode which does not require display is 0V, and the voltage difference between the pixel electrode and the conductive layer is 0V, so that the electric drive display of the region corresponding to the pixel electrode cannot be realized.
The same is true for the voltage application scheme in the second row.
And for the non-working row, the grid voltage of the two switches in each pixel electrode is-10V, so that the two switch elements connected with the pixel electrodes in the row are both in an off state, and the state of the corresponding area of the pixel electrode is maintained unchanged.
(2) For the second control method: controlling the voltage input to the control lead and the input lead so as to control the set target area to be in a display state; then simultaneously controlling the set areas corresponding to the two rows of pixel electrodes in the target area to be in an erasing state every time; to achieve a fast display.
The specific voltage control process is shown in fig. 10(a) -10 (c); a voltage Vcom applied to the conductive layer is 0V; referring to fig. 10(a), firstly, the target areas corresponding to the pixel electrodes with the set number of rows are controlled to be in the display state, the gate voltages of the two switches in each pixel electrode are both 50V for the row to be displayed, the voltages applied to the sources of the two switching elements corresponding to each pixel electrode in the row are both 40V, at this time, the voltage applied to each pixel electrode in the display row is both 40V, and the voltage difference formed between the conductive layer and the pixel electrode is 40V, so that the electric-driven display of the areas corresponding to the pixel electrodes can be realized.
Then simultaneously controlling the set areas corresponding to the two rows of pixel electrodes in the target area to be in an erasing state;
referring to fig. 10(b), for the first row that needs to perform an erase operation: in the pixel unit needing to be erased, the gate voltage of the first switch element in each pixel electrode is 30V, the source voltage is 20V, the gate voltage of the second switch element is-10V, and the source voltage is 0V, so that the voltage difference between the pixel electrode needing to be erased and the conductive layer is 20V, and the erasing can be realized; the voltage difference between the erased pixel electrode and the conductive layer is 0V, and the state is maintained unchanged.
For the second row that needs to perform an erase operation: according to the voltage applying method with reference to fig. 10 (c); this makes it possible to simultaneously perform an erasing operation of a set region for two rows of pixel electrodes.
And for the non-working row, the grid voltage of the two switches in each pixel electrode is-10V, so that the two switch elements connected with the pixel electrodes in the row are both in an off state, and the state of the corresponding area of the pixel electrode is maintained unchanged.
(3) For the third control method: the voltage input to the control wire and the input wire is controlled to control the set first target area to be in a display state, and simultaneously control the set second target area to be in an erasing state, so as to realize rapid display.
Specifically, the set area corresponding to the pixel electrode in the previous row is in an erasing state while the area corresponding to the pixel electrode in the current row is controlled to be in a display state; the display state of the corresponding area of one row of pixel electrodes is controlled in two rows of pixel electrodes, and the corresponding area of the previous row of pixel electrodes is controlled to be in an erasing state.
Referring to fig. 11, the voltage Vcom applied to the conductive layer is 0V;
for a row needing to be erased, the gate voltages of two switching elements in each pixel electrode are both 30V, and in the row:
the voltage applied to the source of the first switching element of the pixel electrode needing to be erased is 20V, the voltage applied to the second switching element is 40V, the first switching element is conducted, and the voltage applied to the pixel electrode is 20V; the voltage difference between the conductive layer and the conductive layer is 20V, and the area corresponding to the pixel can be erased.
The voltage applied to the source of the first switching element of the pixel electrode which does not need to be erased is 0V, the voltage applied to the source of the second switching element of the pixel electrode is 40V, the first switching element is conducted, and the voltage applied to the pixel electrode is 0V; the voltage difference between the conductive layer and the pixel is 0V, and the state of the corresponding area of the pixel is unchanged;
for a row needing to be displayed, the source voltage of the first switching element in each pixel electrode is-10V, the source voltage of the second switching element is 50V, the second switching tube is conducted in the row, the voltage loaded on each pixel electrode in the row is 40V, and electric drive display of the corresponding area of the pixel electrodes can be achieved.
Of course, if each switching element group is formed by connecting three switching elements in parallel, the voltages applied to the pixel electrodes in three rows can be simultaneously controlled so that the regions corresponding to different pixel electrodes are in a set state.
The larger the number of parallel switching elements in each switching element group, the larger the number of rows of pixel electrodes that can be simultaneously controlled.
The effect and specific application of the bistable liquid crystal writing device with the fast electric driving display function in this embodiment are the same as those described above, and are not described again.
EXAMPLE six
According to an embodiment of the present invention, an embodiment of a liquid crystal writing display is disclosed, which includes the electrically driven liquid crystal writing display device disclosed in embodiment four.
The liquid crystal layer of the liquid crystal writing display is made of liquid crystal materials in the conventional liquid crystal writing display.
It should be noted that the control mode of the control unit specifically includes:
the control unit is configured to control the voltages of the input control lead and the input lead so as to simultaneously control the set areas corresponding to the at least two rows of pixel electrodes to be in a display state; to achieve a fast display.
Corresponding to the control mode of the control unit, the display method of the liquid crystal writing display specifically comprises the following steps:
controlling the voltage of the input control lead and the input lead to simultaneously control the set areas corresponding to at least two rows of pixel electrodes to be in a display state; to achieve a fast display.
Also taking the circuit structure shown in fig. 8(a) as an example, the specific voltage control process is shown in fig. 9, and the specific voltage application process has been described in detail in the fifth embodiment, which is not described again here.
The effect achieved by the liquid crystal writing display of the present embodiment is the same as that described above.
EXAMPLE seven
According to an embodiment of the present invention, there is disclosed an electronic paper/electronic ink including: the conducting layer, the liquid crystal layer and the basal layer are arranged in sequence; wherein, the liquid crystal layer is made of polar material.
The structure of the substrate layer is the same as that of the bistable liquid crystal writing device disclosed in the first embodiment or the fifth embodiment, and the voltage driving manner for performing display is also the same, which is not described again.
Example eight
According to the embodiment of the invention, an embodiment of an electronic schoolbag is disclosed, which is realized by adopting a bistable liquid crystal writing device disclosed in the second embodiment or the fifth embodiment, wherein the bistable liquid crystal writing device is internally provided with:
the display control module is configured to select display content and perform electric drive display at a set position of the liquid crystal writing device;
the writing control module is configured to be used for realizing writing at a set position on the liquid crystal writing device;
the erasing control module is configured to erase the content of the set position on the liquid crystal writing device;
the data transmission module is configured to be used for realizing data transmission between the liquid crystal writing device and other terminal equipment;
and the data storage module is configured to be used for realizing the storage of the set writing or display content.
Or, the electronic schoolbag is implemented by the electronic paper/electronic ink disclosed in the seventh embodiment, wherein:
the display control module is configured to be used for selecting display content and performing electric drive display at a set position of the electronic paper/electronic ink;
the writing control module is configured to be used for realizing writing at a set position on the electronic paper/electronic ink;
the erasing control module is configured to erase the content of the set position on the electronic paper/electronic ink;
the data transmission module is configured to be used for realizing data transmission between the electronic paper/electronic ink and other terminal equipment;
and the data storage module is configured to be used for realizing the storage of the set writing or display content.
In the above two modes, the display content includes: book content, exercise or exercise books or drawing books.
In this embodiment, the electronic schoolbag can obtain the book content and the exercise book content of each lesson from the cloud, the storage system or through the network for displaying, and can perform annotation/recording on the basis of displaying the contents; the exercise book, the exercise book or the drawing book can be displayed, writing/drawing, erasing or storing can be carried out on the basis, and the storing can be carried out according to the time sequence, so that the stored contents can be recorded page by page like a real book; and meanwhile, the stored content can be called out for reference/editing.
In the embodiment, the electronic schoolbag integrates a book, an exercise book, a homework book, a writing pen and an eraser, paper consumables are not needed, eyes of students are protected to the maximum degree, meanwhile, the learning and review of the students are greatly facilitated, and the classroom display efficiency is improved.
Example nine
According to the embodiment of the invention, an embodiment of a liquid crystal large screen is disclosed, the liquid crystal large screen is realized by adopting the bistable liquid crystal writing device disclosed in the second embodiment or the fifth embodiment, and the bistable liquid crystal writing device is internally provided with:
the display control module is configured to select display content and perform electric drive display at a set position of the liquid crystal writing device;
the writing control module is configured to be used for realizing writing at a set position on the liquid crystal writing device;
the erasing control module is configured to erase the content of the set position on the liquid crystal writing device;
the data transmission module is configured to be used for realizing data transmission between the liquid crystal writing device and other terminal equipment;
the data storage module is configured to be used for storing the set writing or display content;
or, the liquid crystal large screen is implemented by the electronic paper/electronic ink disclosed in the seventh embodiment, wherein:
the display control module is configured to be used for selecting display content and performing electric drive display at a set position of the electronic paper/electronic ink;
the writing control module is configured to be used for realizing writing at a set position on the electronic paper/electronic ink;
the erasing control module is configured to erase the content of the set position on the electronic paper/electronic ink;
the data transmission module is configured to be used for realizing data transmission between the electronic paper/electronic ink and other terminal equipment;
and the data storage module is configured to be used for realizing the storage of the set writing or display content.
In the two implementation modes, the display position and the writing area can be divided on the large liquid crystal screen; or, the display position and the writing area of the liquid crystal large screen are set automatically. Thus, the set content can be displayed and simultaneously marked or explained; the user does not need to spend too long time for writing on the blackboard, so that the time can be saved, and the efficiency is improved.
Certainly, the set position of the large liquid crystal screen can also be provided with a liquid crystal display screen to realize playing of dynamic contents such as animation, video and the like.
The liquid crystal large screen can be used in places such as classrooms and offices, and can integrate writing, displaying, erasing, storing, communicating and other functions.
Example ten
According to the embodiment of the invention, an embodiment of a smart classroom is disclosed, wherein the smart classroom comprises an electronic schoolbag in the eighth embodiment, a liquid crystal large screen in the ninth embodiment and a teacher terminal;
the three are communicated with each other to realize data transmission, and the contents displayed or written on the electronic book package can be synchronously displayed on the teacher terminal; the teacher terminal can control the content displayed on the liquid crystal large screen or the electronic book pack, and intelligent teaching is achieved.
Although the embodiments of the present invention have been described with reference to the accompanying drawings, it is not intended to limit the scope of the present invention, and it should be understood by those skilled in the art that various modifications and variations can be made without inventive efforts by those skilled in the art based on the technical solution of the present invention.

Claims (22)

1. An electrically driven liquid crystal writing display device, comprising: a conductive layer, a liquid crystal layer, and a base layer; the base layer includes:
the pixel electrodes are arranged in an array shape, and each pixel electrode is correspondingly connected with one switch element group;
the switching element group comprises two or more switching elements, wherein each switching element is provided with an input end, an output end and a control end, the output ends of all the switching elements in each switching element group are connected, and the output ends of the switching elements as the switching element group are connected with the pixel electrodes;
the control end of each row of pixel electrodes corresponding to the switch element is connected with a control lead; the input end of the switch element corresponding to each row of pixel electrode is connected with two or more than two input leads according to the control requirement and the set rule, and the input ends of different switch elements of each row of single switch element group are connected with different input leads;
the rows and columns may be interchanged.
2. An electrically driven liquid crystal writing display device, comprising: a conductive layer, a liquid crystal layer, and a base layer; the base layer includes:
the pixel electrodes are arranged in an array shape, and each pixel electrode is correspondingly connected with one switch element group;
the switching element group comprises two or more switching elements, wherein each switching element is provided with an input end, an output end and a control end, the output ends of all the switching elements in each switching element group are connected, and the output ends of the switching elements as the switching element group are connected with the pixel electrodes;
the control end of each row of pixel electrodes corresponding to the switch element is connected with two or more than two control leads according to the control requirement and the set rule, and the switch elements in each row of single switch element group are respectively connected with different control leads; the input end of the switch element corresponding to each row of pixel electrode is connected with two or more than two input leads according to the control requirement and the set rule, and different switch elements in each row of single switch element group are connected with different input leads;
the rows and columns may be interchanged.
3. An electrically driven liquid crystal writing display device as claimed in claim 1 or 2, wherein the control conductors and the input conductors are arranged crosswise and the pixel electrodes are located at the crossing positions.
4. An electrically-driven liquid crystal writing display device according to claim 1 or 2, wherein the switching elements in the switching element group are: any one or combination of a TFT, a MOSFET, an IGBT or a bipolar switching tube.
5. An electrically driven liquid crystal writing display device according to claim 1 or 2, further comprising: and the control unit is configured to control the voltages input to the control lead and the input lead so as to simultaneously control the set areas corresponding to the at least two rows of pixel electrodes to be in a display state, thereby realizing rapid display.
6. An electrically driven liquid crystal writing display device according to claim 1 or 2, further comprising: a control unit configured to control voltages input to the control wire and the input wire to control the set target area to be in a display state; then simultaneously controlling the set areas corresponding to at least two rows of pixel electrodes in the target area to be in an erasing state every time; and realizing rapid display.
7. An electrically driven liquid crystal writing display device according to claim 1 or 2, further comprising: and the control unit is configured to control the voltages input to the control lead and the input lead so as to control the set first target area to be in a display state and control the set second target area to be in an erasing state at the same time, thereby realizing quick display.
8. An electrically-driven liquid crystal writing display method based on the electrically-driven liquid crystal writing display device of any one of claims 1 to 7, comprising: and controlling the voltage input to the control lead and the input lead so as to simultaneously control the set areas corresponding to at least two rows of pixel electrodes to be in a display state, thereby realizing rapid display.
9. An electrically-driven liquid crystal writing display method based on the electrically-driven liquid crystal writing display device of any one of claims 1 to 7, comprising: controlling the voltage input to the control lead and the input lead so as to control the set target area to be in a display state; then simultaneously controlling the set areas corresponding to at least two rows of pixel electrodes in the target area to be in an erasing state every time; and realizing rapid display.
10. An electrically-driven liquid crystal writing display method based on the electrically-driven liquid crystal writing display device of any one of claims 1 to 7, comprising: the voltage input to the control wire and the input wire is controlled to control the set first target area to be in a display state, and simultaneously control the set second target area to be in an erasing state, so that rapid display is realized.
11. A bistable liquid crystal writing device having a fast electrically driven display function, comprising: an electrically driven liquid crystal writing display device according to any one of claims 1 to 7; or, the electric-driven liquid crystal writing display method of any one of claims 8 to 10 is adopted to realize rapid electric-driven display; the liquid crystal layer is a bistable liquid crystal capable of realizing pressure writing display.
12. A liquid crystal writing display, comprising: an electrically driven liquid crystal writing display device according to any one of claims 1 to 5; alternatively, a fast electrically driven display is realized by using the electrically driven liquid crystal writing display method of claim 8.
13. An electronic paper/electronic ink with a fast electrically driven display function, comprising: the conductive layer, the polar material layer and the substrate layer are arranged in sequence; the base layer includes:
the pixel electrodes are arranged in an array shape, and each pixel electrode is correspondingly connected with one switch element group;
the switching element group comprises two or more switching elements, wherein each switching element is provided with an input end, an output end and a control end, the output ends of all the switching elements in each switching element group are connected, and the output ends of the switching elements as the switching element group are connected with the pixel electrodes;
the control end of each row of pixel electrodes corresponding to the switch element is connected with a control lead; the input end of the switch element corresponding to each row of pixel electrode is connected with two or more than two input leads according to the control requirement and the set rule, and different switch elements of each row of single switch element group are connected with different input leads;
the rows and columns may be interchanged.
14. An electronic paper/electronic ink with a fast electrically driven display function, comprising: the conductive layer, the polar material layer and the substrate layer are arranged in sequence; the base layer includes:
the pixel electrodes are arranged in an array shape, and each pixel electrode is correspondingly connected with one switch element group;
the switching element group comprises two or more switching elements, wherein each switching element is provided with an input end, an output end and a control end, the output ends of all the switching elements in each switching element group are connected, and the output ends of the switching elements as the switching element group are connected with the pixel electrodes;
the control end of each row of pixel electrodes corresponding to the switch elements is connected with two or more than two control leads according to the control requirement and the set rule, and different switch elements in each row of single switch element group are respectively connected with different control leads; the input end of the switch element corresponding to each row of pixel electrode is connected with two or more than two input leads according to the control requirement and the set rule, and different switch elements in each row of single switch element group are connected with different input leads;
the rows and columns may be interchanged.
15. An electronic paper/electronic ink with a rapid electric driving display function as claimed in claim 13 or 14, wherein the control wires and the input wires are arranged crosswise, and the pixel electrodes are located at the crossing positions.
16. The electronic paper/electronic ink with a rapid electric driving display function as claimed in claim 13 or 14, wherein the switch elements in the switch element group are: any one or combination of a TFT, a MOSFET, an IGBT or a bipolar switching tube.
17. The electronic paper/electronic ink with a rapid electric driving display function as claimed in claim 13 or 14, further comprising: the control unit is configured to control the voltages input to the control lead and the input lead so as to simultaneously control the set areas corresponding to the at least two rows of pixel electrodes to be in a display state and realize quick display;
alternatively, the first and second electrodes may be,
further comprising: a control unit configured to control voltages input to the control wire and the input wire to control the set target area to be in a display state; then, simultaneously controlling the set areas corresponding to at least two rows of pixel electrodes in the target area to be in an erasing state every time, and realizing rapid display;
alternatively, the first and second electrodes may be,
further comprising: and the control unit is configured to control the voltages input to the control lead and the input lead so as to control the set first target area to be in a display state and control the set second target area to be in an erasing state at the same time, thereby realizing quick display.
18. An electronic schoolbag, comprising: a bistable liquid crystal writing device having a fast electric drive display function as claimed in claim 11; the bistable liquid crystal writing device with the rapid electric drive display function is provided with:
the display control module is configured to select display content and perform electric drive display at a set position of the liquid crystal writing device;
the writing control module is configured to be used for realizing writing at a set position on the liquid crystal writing device;
the erasing control module is configured to erase the content of the set position on the liquid crystal writing device;
the data transmission module is configured to be used for realizing data transmission between the liquid crystal writing device and other terminal equipment;
the data storage module is configured to be used for storing the set writing or display content;
alternatively, the first and second electrodes may be,
comprising the electronic paper/electronic ink of any one of claims 13-17;
the electronic paper/electronic ink is provided with:
the display control module is configured to be used for selecting display content and performing electric drive display at a set position of the electronic paper/electronic ink;
the writing control module is configured to be used for realizing writing at a set position on the electronic paper/electronic ink;
the erasing control module is configured to erase the content of the set position on the electronic paper/electronic ink;
the data transmission module is configured to be used for realizing data transmission between the electronic paper/electronic ink and other terminal equipment;
and the data storage module is configured to be used for realizing the storage of the set writing or display content.
19. The electronic book of claim 18, wherein the display content comprises: book content, exercise or exercise books or drawing books.
20. A liquid crystal large panel, comprising: a bistable liquid crystal writing device having a fast electric drive display function as claimed in claim 11; the bistable liquid crystal writing device with the rapid electric drive display function is provided with:
the display control module is configured to select display content and perform electric drive display at a set position of the liquid crystal writing device;
the writing control module is configured to be used for realizing writing at a set position on the liquid crystal writing device;
the erasing control module is configured to erase the content of the set position on the liquid crystal writing device;
the data transmission module is configured to be used for realizing data transmission between the liquid crystal writing device and other terminal equipment;
the data storage module is configured to be used for storing the set writing or display content;
alternatively, the first and second electrodes may be,
comprising the electronic paper/electronic ink of any one of claims 13-17;
the electronic paper/electronic ink is provided with:
the display control module is configured to be used for selecting display content and performing electric drive display at a set position of the electronic paper/electronic ink;
the writing control module is configured to be used for realizing writing at a set position on the electronic paper/electronic ink;
the erasing control module is configured to erase the content of the set position on the electronic paper/electronic ink;
the data transmission module is configured to be used for realizing data transmission between the electronic paper/electronic ink and other terminal equipment;
and the data storage module is configured to be used for realizing the storage of the set writing or display content.
21. The liquid crystal large panel according to claim 20, wherein the liquid crystal large panel divides a display position and a writing area; or, the display position and the writing area of the liquid crystal large screen are set automatically.
22. A smart classroom, comprising: an electronic bag as claimed in any one of claims 18 to 19, a liquid crystal large screen as claimed in any one of claims 20 to 21, and a teacher's terminal; the electronic schoolbag, the liquid crystal large screen and the teacher terminal are communicated with each other; the display or writing content on the electronic schoolbag can be transmitted and/or displayed on a teacher terminal/a liquid crystal large screen.
CN202110196914.XA 2020-12-28 2021-02-22 Bistable liquid crystal writing device with quick electric driving display function and method Active CN112904606B (en)

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