Liquid crystal writing film circuit structure, liquid crystal writing film and liquid crystal writing board

Abstract

The present invention provides a circuit structure of a liquid crystal writing diaphragm, a liquid crystal writing diaphragm and a liquid crystal writing board thereof, comprising: a plurality of horizontal electrodes, a voltage source module, a plurality of vertical electrodes, a main control circuit and an operational amplifier module controlled by the main control circuit; the operational amplifier module includes a plurality of horizontal operational amplifiers and a plurality of vertical operational amplifiers, and the horizontal operational amplifiers and the vertical operational amplifiers are electrically connected to a driving IC module; the horizontal electrodes are electrically connected to the output ends of the horizontal operational amplifiers, and the vertical electrodes are electrically connected to the output ends of the vertical operational amplifiers; the driving IC module is used to control the horizontal electrodes and the vertical electrodes to output different voltages through the operational amplifiers. The beneficial effects of the present invention are as follows: while ensuring that different voltage values can be output by the horizontal electrodes and the vertical electrodes, compared with the traditional setting, the circuit structure is streamlined, and the energy consumption is also reduced, making the liquid crystal writing diaphragm lighter and lower in energy consumption.

Description

Technical Field

[0001] The present invention relates to the field of liquid crystal writing films, and particularly to a circuit structure of a liquid crystal writing film sheet, a liquid crystal writing film sheet and a liquid crystal writing board thereof. Background Art

[0002] In order to achieve local erasure of the writing film, an external driving circuit needs to select one voltage from multiple different voltages and apply it to the corresponding electrode. And in order to ensure that the voltage of the electrode can be stabilized at the expected voltage value for at least 20 ms, each electrode requires at least 8 bipolar transistors (junction transistors) and ICs, resulting in a very complex circuit structure, high manufacturing cost, and large power consumption and volume of the circuit due to multiple bipolar transistors. Therefore, there is an urgent need for a circuit structure of a liquid crystal writing film sheet with a simple circuit structure that can be locally erased. Summary of the Invention

[0003] The main object of the present invention is to provide a circuit structure of a liquid crystal writing film sheet, a liquid crystal writing film sheet and a liquid crystal writing board thereof, aiming to solve the technical problem of complex circuit structure caused by the need to set multiple bipolar transistors.

[0004] The present invention provides a circuit structure of a liquid crystal writing film sheet, including: a plurality of horizontal electrodes, a voltage source module, a plurality of vertical electrodes, a main control circuit, and a driving IC module and an operational amplifier module controlled by the main control circuit;

[0005] The operational amplifier module includes a plurality of horizontal operational amplifiers and a plurality of vertical operational amplifiers, and the horizontal operational amplifiers and the vertical operational amplifiers are electrically connected to the driving IC module;

[0006] The horizontal electrodes are electrically connected to the output ends of the horizontal operational amplifiers, and the vertical electrodes are electrically connected to the output ends of the vertical operational amplifiers;

[0007] The driving IC module is connected to the voltage source module, and the voltage source module is used to output multiple different voltages to the driving IC module. The driving IC module is used to control the horizontal electrodes to output different voltages through the horizontal operational amplifiers and control the vertical electrodes to output different voltages through the vertical operational amplifiers.

[0008] Further, the voltage source module includes a positive voltage source and a negative voltage source, and the positive voltage source and the negative voltage source are connected to the driving IC module.

[0009] Further, the voltage source module further includes a voltage dividing unit, and the positive voltage source and the negative voltage source are respectively connected to the driving IC module after passing through the voltage dividing unit.

[0010] Further, the driving IC module includes a horizontal driving IC and a vertical driving IC. The horizontal driving IC and the vertical driving IC are controlled by the main control circuit. The horizontal driving IC is electrically connected to a plurality of the horizontal operational amplifiers, and the horizontal driving IC is used to control the output voltages of the plurality of horizontal operational amplifiers. The vertical driving IC is connected to the vertical operational amplifier, and the vertical driving IC is used to control the output voltages of the plurality of vertical operational amplifiers.

[0011] Further, the horizontal driving IC is connected to the non-inverting input terminal of the horizontal operational amplifier. The inverting input terminal of the horizontal operational amplifier is connected to the output terminal, and the output terminal of the horizontal operational amplifier is connected to the horizontal electrode.

[0012] Further, a plurality of the horizontal operational amplifiers or a plurality of vertical operational amplifiers are integrally arranged on a PCB board.

[0013] Further, the horizontal operational amplifier includes four output terminals, and all of the four output terminals are used to connect to the horizontal electrode.

[0014] Further, the driving IC module is any one of an LCD driving IC module, a VFD driving IC module, a TFT / OLDE, and a plasma driving IC module.

[0015] The present invention also provides a liquid crystal writing film, which includes a cholesteric liquid crystal and the above-mentioned liquid crystal writing film circuit structure. A plurality of the horizontal electrodes and a plurality of the vertical electrodes are respectively arranged side by side, and the plurality of horizontal electrodes and the plurality of vertical electrodes are respectively arranged on both sides of the cholesteric liquid crystal and are in contact connection with the cholesteric liquid crystal.

[0016] The present invention also provides a liquid crystal writing board, which includes the above-mentioned liquid crystal writing film.

[0017] The beneficial effects of the present invention: By providing a driving IC, a plurality of horizontal operational amplifiers, and a plurality of vertical operational amplifiers, corresponding connection of the horizontal electrodes and the vertical electrodes can release different voltage values for user writing, partial erasing, and full erasing. In addition, by providing a driving IC, a horizontal amplifier, and a vertical amplifier, the technical problem of complex structure caused by the need to provide a plurality of diodes and triodes in the traditional writing film with a local erasing function is solved. By providing a driving IC, a plurality of horizontal operational amplifiers, and a plurality of vertical operational amplifiers in the present application, when different voltage values can be output by the horizontal electrodes and the vertical electrodes, compared with the traditional setting, the circuit structure is streamlined, and the energy consumption is reduced, making the liquid crystal writing film lighter and lower in energy consumption. Description of the Drawings

[0018] Figure 1It is a circuit diagram of an embodiment of the circuit structure of the liquid crystal writing film of the present invention;

[0019] Figure 2 It is a schematic structural diagram of an embodiment of the liquid crystal writing film of the present invention;

[0020] Figure 3 It is a side view of the structure of an embodiment of the liquid crystal writing film of the present invention;

[0021] Figure 4 It is a circuit diagram of an embodiment of the voltage source module, driving IC module and operational amplifier module of the circuit structure of the liquid crystal writing film of the present invention.

[0022] The realization of the object of the present invention, functional characteristics and advantages will be further described with reference to the embodiments and the accompanying drawings. Detailed Embodiments

[0023] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0024] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement conditions between components in a specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indications will also change accordingly. The connection described can be a direct connection or an indirect connection.

[0025] The term "and / or" in this article is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and B can represent: A exists alone, A and B exist simultaneously, and B exists alone.

[0026] In addition, the descriptions such as "first" and "second" in the present invention are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the fact that those of ordinary skill in the art can implement them. When the combination of technical solutions appears to be contradictory or unable to be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the present invention.

[0027] Refer to Figure 1 and Figure 4, the present invention provides a circuit structure of a liquid crystal writing film, comprising: a plurality of horizontal electrodes 13, a voltage source module 5, a plurality of vertical electrodes 23, a main control circuit 4, and a driving IC module 3 controlled by the main control circuit 4; the operational amplifier module includes a plurality of horizontal operational amplifiers 11 and a plurality of vertical operational amplifiers 21, and the horizontal operational amplifiers 11 and the vertical operational amplifiers 21 are electrically connected to the driving IC module 3; the horizontal electrodes 13 are electrically connected to the output terminals of the horizontal operational amplifiers 11, and the vertical electrodes 23 are electrically connected to the output terminals of the vertical operational amplifiers 21; the driving IC module 3 is connected to the voltage source module 5, and the voltage source module 5 is used to output a plurality of different voltages to the driving IC module 3, and the driving IC module 3 is used to control the horizontal electrodes 13 to output different voltages through the horizontal operational amplifiers 11 and control the vertical electrodes 23 to output different voltages through the vertical operational amplifiers 21.

[0028] In this embodiment, by setting the driving IC, a plurality of horizontal operational amplifiers 11 and a plurality of vertical operational amplifiers 21, the corresponding connection of the horizontal electrodes 13 and the vertical electrodes 23 can release different voltage values for the user's writing, partial erasure, and full erasure. In addition, by setting the driving IC, the horizontal amplifier, and the vertical amplifier, the technical problem of complex structure caused by the need to set a plurality of diodes and triodes in the traditional writing film is solved. And in this application, by setting the driving IC, a plurality of horizontal operational amplifiers 11 and a plurality of vertical operational amplifiers 21, when different voltage values can be output by the horizontal electrodes 13 and the vertical electrodes 23, compared with the traditional setting, the circuit structure is streamlined, and the energy consumption is also reduced, making the liquid crystal writing film more portable and lower in energy consumption.

[0029] Referring to Figure 4 , in this embodiment, the voltage source module 5 includes a positive voltage source 51 and a negative voltage source 52, and the positive voltage source 51 and the negative voltage source 52 are connected to the driving IC module 3. In order to implement the user's erasure function, generally, a positive voltage source 51 and a negative voltage source 52 need to be set. The positive voltage source 51 is attached to the horizontal electrodes 13, and the negative voltage source 52 is attached to the vertical electrodes 23 (it can also be that the positive power supply is attached to the vertical electrodes 23 and the negative voltage source 52 is attached to the horizontal electrodes 13) to facilitate the implementation of the erasure function. Specifically, in order to facilitate the user's writing, partial erasure, and full erasure, generally, four voltage sources need to be set, namely Vp, 1 / 3Vp, -1 / 3Vp, -Vp, and Vp > Vth > 1 / 3Vp, (where Vth is the voltage threshold required for the cholesteric liquid crystal to change from the P state to the FC state. When the voltage is greater than this value, the liquid crystal gradually begins to change state, and when the voltage is less than this value, the liquid crystal does not change state; Vp: the voltage peak value for the cholesteric liquid crystal to change from the P state to the FC state). When a certain point (selected point or erasure point) needs to be erased, only the horizontal electrode 13 and the vertical electrode 23 need to be connected to Vp and -Vp respectively, and this point can be erased.

[0030] In this embodiment, the voltage source module 5 further includes a voltage dividing unit. The positive voltage source 51 and the negative voltage source 52 are respectively connected to the driving IC module 3 after passing through the voltage dividing unit. It is also possible to only set two voltage sources, namely the positive voltage source 51 and the negative voltage source 52, and then divide the voltage of the voltage source through the voltage dividing unit to achieve the output of four or even more voltage sources. The voltage dividing unit can be implemented by a resistor or by an operational amplifier. This application does not make any limitations in this regard. All electronic components and their combinations that can be used to divide the voltage of the voltage source are within the protection scope of this application.

[0031] In this embodiment, the driving IC module 3 includes a horizontal driving IC and a vertical driving IC. The horizontal driving IC and the vertical driving IC are controlled by the main control circuit 4. The horizontal driving IC is electrically connected to a plurality of horizontal operational amplifiers 11, and the horizontal driving IC is used to control the plurality of horizontal operational amplifiers 11 to output voltages. The vertical driving IC is connected to the vertical operational amplifier 21, and the vertical driving IC is used to control the plurality of vertical operational amplifiers 21 to output voltages.

[0032] In this embodiment, the horizontal electrode 13 and the vertical electrode 23 can be implemented using different driving ICs to reduce the complexity of the driving IC and save costs. In another embodiment, it is also possible to use only one driving IC for implementation. However, if only one driving IC is used, the structure of the driving IC will be quite complex and the cost will also increase. Therefore, it is preferably to use two driving ICs (i.e., the horizontal driving IC 31 and the vertical driving IC 32) to separate the driving ICs of the vertical electrode 23 and the horizontal electrode 13.

[0033] In this embodiment, the horizontal driving IC 31 is connected to the non-inverting input terminal of the horizontal operational amplifier 11. The inverting input terminal of the horizontal operational amplifier 11 is connected to the output terminal. The output terminal of the horizontal operational amplifier 11 is connected to the horizontal electrode 13. Similarly, the vertical driving IC 32 is also connected to the non-inverting input terminal of the vertical operational amplifier 21. The inverting input terminal of the vertical operational amplifier 21 is connected to the output terminal. The output terminal of the vertical operational amplifier 21 is connected to the vertical electrode 23, thereby realizing the input of the voltages of the horizontal electrode 13 and the vertical electrode 23, so that the horizontal electrode 13 and the vertical electrode 23 can output corresponding voltages.

[0034] In this embodiment, a plurality of horizontal operational amplifiers 11 or vertical operational amplifiers 21 are integrally arranged on a PCB board. In order to make the processed writing film lighter, a plurality of horizontal operational amplifiers 11 can be integrally arranged on a PCB board, which can also make the subsequent processing more convenient. Similarly, a plurality of vertical operational amplifiers 21 can also be integrally arranged on a PCB board to further make the writing film lighter.

[0035] In this embodiment, the horizontal operational amplifier 11 includes four output terminals, and all of these four output terminals are used to connect to the horizontal electrodes 13. The horizontal operational amplifier 11 including four output terminals enables it to connect to four horizontal electrodes 13, eliminating the need for one horizontal operational amplifier 11 corresponding to one horizontal electrode 13, further saving circuit components and making the structure simpler and more lightweight. In some embodiments, only one or some of the four output terminals may be connected to the horizontal electrodes, which depends on the overall design scheme to avoid redundancy in the overall structure.

[0036] In this embodiment, the driving IC is any one of the LCD driving IC module 3, VFD driving IC module 3, TFT / OLDE, and plasma driving IC module 3. The horizontal driving IC 31 and the vertical driving IC 32 can be any one of the above-mentioned driving ICs, and all of the above-mentioned driving ICs can implement the technical solution of this application.

[0037] Referring to Figures 1-3 , the present invention also provides a liquid crystal writing film, which includes a cholesteric liquid crystal 101 and the above-mentioned liquid crystal writing film circuit structure. A plurality of horizontal electrodes 13 and a plurality of vertical electrodes 23 are arranged side by side respectively. The plurality of horizontal electrodes 13 and the plurality of vertical electrodes 23 are respectively disposed on both sides of the cholesteric liquid crystal 101 and are connected to the cholesteric liquid crystal 101.

[0038] In this embodiment, the plane formed by the plurality of horizontal electrodes 13 and the plane formed by the plurality of vertical electrodes 23 are parallel to each other, enabling the cholesteric liquid crystal 101 disposed therebetween to make corresponding responses under the voltages applied at both ends. Additionally, setting the two planes parallel to each other can also make the structure more aesthetically pleasing. Moreover, the horizontal electrodes 13 and the vertical electrodes 23 are perpendicularly arranged. Erasure will only occur when both the horizontal electrodes 13 and the vertical electrodes 23 at both ends of the cholesteric liquid crystal 101 are erasure voltages, thus facilitating local erasure. In another embodiment, they may not be set perpendicularly and may also be cross-arranged, making the cholesteric liquid crystal 101 in the middle where they intersect in a rhombus shape, that is, the locally erased part is the rhombus part, providing users with a more novel experience and making the shape of the erased part more beautiful.

[0039] In this embodiment, it further includes multiple substrates 100, and the multiple substrates 100 are respectively disposed on the side of the horizontal electrodes 13 away from the cholesteric liquid crystal 101 and on the side of the vertical electrodes 23 away from the cholesteric liquid crystal 101.

[0040] The present invention also provides a liquid crystal writing board, which includes the above-mentioned liquid crystal writing film.

[0041] Advantages of the present invention: By providing a driving IC, a plurality of horizontal operational amplifiers 11, and a plurality of vertical operational amplifiers 21, different voltage values for user writing, partial erasing, and full erasing can be released when the horizontal electrodes 13 and the vertical electrodes 23 are correspondingly connected. Additionally, by providing the driving IC, the horizontal amplifiers, and the vertical amplifiers, the technical problem of complex structure caused by the need to provide multiple diodes and triodes in the traditional writing film is solved. In this application, by providing the driving IC, a plurality of horizontal operational amplifiers 11, and a plurality of vertical operational amplifiers 21, when different voltage values can be output from the horizontal electrodes 13 and the vertical electrodes 23, compared with the traditional setting, the circuit structure is streamlined, and energy consumption is reduced, making the liquid crystal writing film more portable and lower in energy consumption.

[0042] The foregoing are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and changes. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the scope of the claims of the present invention.

Claims

1. A circuit structure of a liquid crystal writing film, characterized in that, Including: A plurality of horizontal electrodes, a voltage source module, a plurality of vertical electrodes, a main control circuit, and a driving IC module and an operational amplifier module controlled by the main control circuit; The operational amplifier module includes a plurality of horizontal operational amplifiers and a plurality of vertical operational amplifiers. The horizontal operational amplifiers and the vertical operational amplifiers are electrically connected to the driving IC module so that the corresponding connected horizontal electrodes and vertical electrodes release different voltage values for user writing, partial erasing, and full erasing; The horizontal electrodes are electrically connected to the output terminals of the horizontal operational amplifiers, and the vertical electrodes are electrically connected to the output terminals of the vertical operational amplifiers; The driving IC module is connected to the voltage source module. The voltage source module is used to output a plurality of different voltages to the driving IC module. The driving IC module is used to control the horizontal electrodes to output different voltages through the horizontal operational amplifiers and control the vertical electrodes to output different voltages through the vertical operational amplifiers; The driving IC module includes a horizontal driving IC and a vertical driving IC. The horizontal driving IC and the vertical driving IC are controlled by the main control circuit. The horizontal driving IC is electrically connected to a plurality of the horizontal operational amplifiers. The horizontal driving IC is used to control a plurality of the horizontal operational amplifiers to output voltages. The vertical driving IC is connected to the vertical operational amplifiers. The vertical driving IC is used to control a plurality of the vertical operational amplifiers to output voltages; The voltage source module includes a positive voltage source and a negative voltage source. The positive voltage source and the negative voltage source are connected to the driving IC module. Among them, the positive voltage source is applied to the horizontal electrodes, and the negative voltage source is applied to the vertical electrodes. The voltage source module is provided with four voltage sources of Vp, 1 / 3Vp, -1 / 3Vp, and -Vp, and Vp > Vth > 1 / 3Vp. Vth is the voltage threshold required for the cholesteric liquid crystal to transition from the P state to the FC state. When the voltage is greater than this value, the liquid crystal gradually starts to change its state. When the voltage is less than this value, the liquid crystal does not change its state. Vp is the voltage peak for the cholesteric liquid crystal to transition from the P state to the FC state; The voltage source module further includes a voltage dividing unit. The positive voltage source and the negative voltage source are respectively connected to the driving IC module through the voltage dividing unit.

2. The liquid crystal writing film circuit structure according to claim 1, characterized in that, The horizontal driving IC is connected to the non-inverting input terminal of the horizontal operational amplifier. The inverting input terminal of the horizontal operational amplifier is connected to the output terminal. The output terminal of the horizontal operational amplifier is connected to the horizontal electrode.

3. The liquid crystal writing film circuit structure according to claim 1, characterized in that, A plurality of the horizontal operational amplifiers or a plurality of vertical operational amplifiers are integrally arranged on a PCB board.

4. The circuit structure of the liquid crystal writing film according to claim 1, wherein The horizontal operational amplifier includes four output terminals, and all of the four output terminals are used to connect to the horizontal electrodes.

5. The liquid crystal writing film circuit structure according to claim 1, characterized in that The driving IC module is any one of an LCD driving IC module, a VFD driving IC module, a TFT / OLDE, and a plasma driving IC module.

6. A liquid crystal writing film, characterized in that, Comprising a cholesteric liquid crystal and the liquid crystal writing film circuit structure according to any one of claims 1-5, a plurality of the horizontal electrodes and a plurality of the vertical electrodes are arranged side by side respectively, and the plurality of horizontal electrodes and the plurality of vertical electrodes are respectively disposed on both sides of the cholesteric liquid crystal and are in contact connection with the cholesteric liquid crystal.

7. A liquid crystal writing board, characterized in that, Comprising the liquid crystal writing film according to claim 6.

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