CN110703527A - Liquid crystal display device and erasing method thereof - Google Patents
Liquid crystal display device and erasing method thereof Download PDFInfo
- Publication number
- CN110703527A CN110703527A CN201910834010.8A CN201910834010A CN110703527A CN 110703527 A CN110703527 A CN 110703527A CN 201910834010 A CN201910834010 A CN 201910834010A CN 110703527 A CN110703527 A CN 110703527A
- Authority
- CN
- China
- Prior art keywords
- preset
- erasing
- liquid crystal
- voltage
- local
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- 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
- G02F1/13718—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 a change of the texture state of a cholesteric liquid crystal
-
- 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
Abstract
The invention relates to a liquid crystal display device and an erasing method thereof, wherein the method comprises the following steps: s1, receiving local erasing information of the local erasing area input by a user; s2, generating a corresponding control signal according to the local erasing information; s3, outputting a driving waveform at a preset voltage and a preset frequency according to the control signal to drive the liquid crystal display device; s4, receiving an erasing operation of erasing the local area input by the user; s5, judging whether the erasing effect of the local area reaches a preset effect; and S6, if not, adjusting the preset voltage and the preset frequency by a preset method. The erasing method of the invention can well erase the local content of the liquid crystal display device and solve the problems of poor local erasing effect or function failure caused by the instability of the membrane.
Description
Technical Field
The present invention relates to the field of liquid crystal display devices, and more particularly, to a liquid crystal display device and an erasing method thereof.
Background
Most of the current liquid crystal handwriting boards adopt a mixture of cholesteric liquid crystal, UV glue and a chiral agent, and the mixture is cured by ultraviolet light in two layers of flexible films with conductive coatings. The cholesteric liquid crystal molecules in the mixture are transparent in a conical shape, can reflect light in a planar shape, and the reflection spectrum of the cholesteric liquid crystal molecules is influenced by the chiral agent, so that different handwriting colors can be realized.
Physical pressure is applied to the two layers of the film, cholesteric liquid crystal molecules in the mixture are squeezed to be changed into a plane shape, and then light can be reflected to show handwriting. When a certain voltage is applied to the two layers of the film, cholesteric liquid crystal molecules in the mixture change from a plane shape to a cone shape according to the magnitude and the direction of the electric field intensity, so that the handwriting erasing effect is realized. This variation is influenced by the type and proportion of cholesteric liquid crystal, UV glue, chiral agent and film material, and also by the process used in the manufacturing process: such as the effect of UV curing light exposure time and intensity and the step of pressing the web. In the full erase operation, to ensure clean erase, the voltage applied to the film is much greater than the threshold voltage for cholesteric liquid crystal planar morphology and tapered switching.
Most of the current liquid crystal handwriting boards can only remove the content of the whole panel at one time. For the local erasing, as mentioned in the general method of the reference document with application number 201711072442.7, two preset voltages are set to perform the whole erasing and the local erasing respectively, as mentioned in the background art, the critical voltage required for the cholesteric liquid crystal to change from the planar form to the tapered form is influenced by many factors, it is found in engineering practice that the consistency of the film cannot be controlled to be very accurate when the film is mass-produced, the film is often erased as the whole due to the critical voltage being lower than the preset voltage, or the local erasing is not reacted due to the critical voltage being greater than the preset voltage, and even if the same film is used, the critical voltage changes with the changes of the aging degree and the environmental temperature in the whole life cycle, and it is likely that the local erasing function fails after the product passing the quality inspection flows into the market.
Disclosure of Invention
The present invention is directed to a liquid crystal display device and an erasing method thereof.
The technical scheme adopted by the invention for solving the technical problems is as follows: an erasing method of a liquid crystal display device is constructed, comprising the following steps:
s1, receiving local erasing information of the local erasing area input by a user;
s2, generating a corresponding control signal according to the local erasing information;
s3, outputting a driving waveform at a preset voltage and a preset frequency according to the control signal to drive the liquid crystal display device;
s4, receiving an erasing operation of erasing the local area input by the user;
s5, judging whether the erasing effect of the local area reaches a preset effect or not;
and S6, if not, adjusting the driving waveform by a preset method.
Preferably, the method further comprises:
and S7, if the erasing effect of the local area reaches a preset effect, storing the current voltage and the current frequency.
Preferably, the step S5 includes:
a1, if the erasing effect of the local area meets a first preset condition, receiving a signal for increasing the local erasing intensity input by a user;
and A2, adjusting the driving waveform by the preset method.
Preferably, the preset method comprises:
keeping the preset frequency unchanged, and increasing the voltage peak-to-peak value of the driving waveform by using preset adjusting voltage;
or keeping the preset voltage unchanged, and reducing the frequency of the driving waveform at a preset adjusting frequency.
Preferably, the step S5 includes:
b1, if the erasing effect of the local area meets a second preset condition, receiving a signal for reducing the local erasing intensity input by a user;
b2, adjusting the driving waveform by the preset method.
Preferably, the preset method comprises:
keeping the preset frequency unchanged, and reducing the voltage peak-to-peak value of the driving waveform by using preset adjusting voltage;
or keeping the preset voltage unchanged, and increasing the frequency of the driving waveform by a preset adjusting frequency.
Preferably, the preset regulation voltage is: 0.1-0.5V.
The present invention also provides a liquid crystal display device comprising:
a first input unit for erasing local erasure information of a local area input by a user;
the control unit is used for generating a corresponding control signal according to the local erasing information;
the driving unit is used for outputting a driving waveform at a preset voltage and a preset frequency according to the control signal to drive the liquid crystal display device;
the second input unit is used for receiving an erasing operation of erasing the local area input by a user;
the judging unit is used for judging whether the erasing effect of the local area reaches a preset effect or not;
and the adjusting unit is used for adjusting the driving waveform by a preset method when the erasing effect of the local area does not reach the preset effect.
Preferably, the preset method comprises:
keeping the preset frequency unchanged, and increasing the voltage peak-to-peak value of the driving waveform by using preset adjusting voltage;
or keeping the preset voltage unchanged, and reducing the frequency of the driving waveform at a preset adjusting frequency.
Preferably, the preset method comprises:
keeping the preset frequency unchanged, and reducing the voltage peak-to-peak value of the driving waveform by using preset adjusting voltage;
or keeping the preset voltage unchanged, and increasing the frequency of the driving waveform by a preset adjusting frequency.
The liquid crystal display device and the erasing method thereof have the following beneficial effects: the erasing method of the invention can well erase the local content of the liquid crystal display device and solve the problems of poor local erasing effect or function failure caused by the instability of the membrane.
Drawings
The invention will be further described with reference to the accompanying drawings and examples, in which:
FIG. 1 is a schematic flowchart illustrating an erasing method of an LCD device according to a first embodiment of the present invention;
FIG. 2 is a flowchart illustrating a second embodiment of an erasing method for an LCD device according to the present invention;
FIG. 3 is a schematic view of a liquid crystal display device according to the present invention;
FIG. 4 is a schematic diagram of a cholesteric liquid crystal film structure according to the invention;
FIG. 5 is a schematic diagram of an LCD device according to an embodiment of the present invention.
Detailed Description
For a more clear understanding of the technical features, objects and effects of the present invention, embodiments of the present invention will now be described in detail with reference to the accompanying drawings.
Referring to fig. 1, a schematic flow chart of a first embodiment of an erasing method of an lcd device according to the present invention is shown. The erasing method can be applied to a liquid crystal display device adopting cholesteric liquid crystal, as shown in fig. 4, which is a schematic structural diagram of a cholesteric liquid crystal film in the liquid crystal display device, wherein the cholesteric liquid crystal film comprises a writing base material 100, a transparent conductive coating 101, cholesteric liquid crystal, UV glue, a chiral agent and a mixture 102 of spacer liner particles which are cured under UV light. It can be known from the characteristics of the cholesteric liquid crystal film that when the voltage applied to the cholesteric liquid crystal film is slightly less than the critical voltage (the critical voltage is the voltage at which the cholesteric liquid crystal switches from a planar state to a tapered state), the cholesteric liquid crystal molecules are in a metastable state, and if physical pressure is repeatedly applied to the writing area of the liquid crystal display device, for example, a smearing operation is performed, the cholesteric liquid crystal molecules originally in the metastable state are converted into the tapered state by the external force, and the writing disappears. The erasing method of the liquid crystal display device provided by the invention utilizes the principle to perform local erasing.
Specifically, as shown in fig. 1, a flowchart of a first embodiment of an erasing method of a liquid crystal display device is shown.
In this embodiment, the erasing method of the liquid crystal display device may include the steps of:
and step S1, receiving the local erasing information of the local erasing area input by the user.
Here, the partial erasure information may be a partial erasure signal, that is, when a user needs to perform partial erasure, a partial erasure signal is first input. The partial erasure information can be inputted through an input device, wherein the input device includes, but is not limited to, a key, a knob, a slider, and the like, which inputs a partial erasure trigger signal. The input means may also be adapted to input a partial erasure intensity increasing signal, a partial erasure intensity decreasing signal, a full erasure intensity signal.
And step S2, generating a corresponding control signal according to the local erasure information.
Specifically, the control signal may be generated by a controller in the liquid crystal display device. The input device receives local erasing information input by a user and transmits the local erasing information to the controller, the controller generates the control signal according to the local erasing information after receiving the local erasing information, and the control signal is used for controlling a driving circuit in the liquid crystal display device.
And step S3, outputting a driving waveform at a preset voltage and a preset frequency according to the control signal to drive the liquid crystal display device.
Specifically, the driving waveform is a square wave and can be generated by a driving circuit in the liquid crystal display device. The driving circuit is connected with the controller, and outputs the driving waveform at a preset voltage and a preset frequency after receiving a control signal output by the controller. The driving waveform can control the liquid crystal molecules in the cholesteric liquid crystal film in the liquid crystal display device to be in a metastable state, that is, the driving waveform output by the preset voltage and the preset frequency can enable the liquid crystal molecules in the cholesteric liquid crystal film in the liquid crystal display device to be in the metastable state.
And step S4, receiving the erasing operation of erasing the local area input by the user.
The erasing operation can be inputted by a user using a finger or other soft object to perform a wiping action at a location to be locally erased (i.e., a local area referred to herein).
And step S5, judging whether the erasing effect of the local area reaches the preset effect.
Specifically, since the driving waveform drives the liquid crystal molecules in the cholesteric liquid crystal film in the liquid crystal display device to be in the metastable state in step S3, when the erasing operation for erasing the local area is received in step S4, the liquid crystal molecules in the cholesteric liquid crystal film in the metastable state change their own form, thereby achieving the effect of erasing the written content in the local area. Therefore, the erasing effect of the local area can be judged at the moment, and whether the erasing effect of the local area reaches the preset effect or not is judged.
The preset effect may be that written content in the local area boundary is erased completely, that is, written content in the local area boundary disappears completely, and written content outside the local area boundary (that is, a display interface of the liquid crystal display device is in an area except the local area) remains unchanged.
And step S6, if not, adjusting the driving waveform by a preset method.
In the embodiment of the invention, the preset method comprises two methods:
firstly, keeping the current preset frequency of a driving waveform unchanged, and when receiving a signal for increasing the local erasing intensity input by an input device, controlling a driving circuit by a controller to increase the voltage peak-to-peak value of the driving waveform by preset adjusting voltage; alternatively, the controller controls the driving circuit to lower the voltage peak-to-peak value of the driving waveform at a preset adjustment voltage when receiving a reduced local erase strength signal input from the input device.
Secondly, keeping the current preset voltage of the driving waveform unchanged, and when receiving a signal for increasing the local erasing intensity input by the input device, controlling the driving circuit by the controller to reduce the frequency of the driving waveform at a preset adjusting frequency; alternatively, when receiving the reduced local erase strength signal input by the input device, the controller controls the driving circuit to increase the frequency of the driving waveform at a preset adjustment frequency.
In the embodiment of the invention, the preset adjusting voltage is 0.1-0.5V. Namely, a better adjusting effect can be obtained by increasing or decreasing the voltage peak-to-peak value of the driving waveform by a voltage step value of 0.1-0.5V.
In the embodiment of the present invention, when the preset frequency of the driving waveform is 10Hz, the preset adjusting frequency may be set to about 1 Hz.
Alternatively, after the adjustment of the driving waveform is completed in step S6, the process returns to step S5 to continuously determine whether the erasing effect of the local area reaches the preset effect, and the steps S5 to S6 are repeatedly performed until the erasing effect of the local area reaches the preset effect.
Further, the erasing method of the liquid crystal display device further comprises the following steps:
and step S7, if the erasing effect of the local area reaches the preset effect, storing the current voltage and the current frequency.
Referring to fig. 2, fig. 2 is a flowchart illustrating a second erasing method of the liquid crystal display device according to the second embodiment of the invention.
The embodiment further comprises the following steps on the basis of the first embodiment:
specifically, step S6 includes:
step A1, if the erasing effect of the local area satisfies the first preset condition, receiving a signal for increasing the local erasing intensity input by the user.
The erasing effect of the local area meeting the first preset condition comprises the following steps: the handwriting in the boundary of the local area is not well erased, i.e. part of the written content exists in the boundary of the local area or the written content in the boundary of the local area is not changed at all and still keeps the original state.
And A2, adjusting the driving waveform in a preset method.
In this step, the preset method includes:
keeping the preset frequency unchanged, and increasing the voltage peak value of the driving waveform by preset regulation voltage; alternatively, the frequency of the drive waveform is reduced at a preset regulation frequency while keeping the preset voltage constant.
Specifically, when the erasing effect of the local area satisfies the first preset condition, the user triggers the corresponding input device to input the signal for increasing the local erasing intensity. When the controller receives the signal for increasing the local erasing intensity, the controller controls the driving circuit to keep the preset frequency unchanged, and the voltage peak value of the driving waveform is increased by the preset adjusting voltage, so that the written content in the local area is erased; or the controller controls the driving circuit to keep the preset voltage unchanged, and reduces the frequency of the driving waveform at the preset adjusting frequency.
It can be understood that, after step a2 is completed, step S5 is returned again to determine the erasing effect of the local area, if the erasing effect of the local area reaches the preset effect, the current frequency and voltage are saved, if not, steps a1-a2 are continued, and steps S5 to a2 are repeated; until the control effect of the local area reaches the preset effect.
Further, step S6 may further include:
and step B1, if the erasing effect of the local area meets a second preset condition, receiving a signal for reducing the local erasing intensity input by a user.
And step B2, adjusting the driving waveform by a preset method.
Here, the erasing effect of the local area satisfying the second preset condition includes: the written content within the entire display interface of the liquid crystal display device is too light or completely erased.
In this step, the preset method includes:
keeping the preset frequency unchanged, and reducing the voltage peak value of the driving waveform by using the preset adjusting voltage; alternatively, the frequency of the drive waveform is increased at a preset regulation frequency while keeping the preset voltage constant.
Specifically, when the writing of the writing content in the whole display interface of the local area liquid crystal display device is too light or is completely cleared, the user triggers the corresponding input device to input the signal for reducing the local erasing intensity. When the controller receives the signal for reducing the local erasing intensity, the controller controls the driving circuit to keep the preset frequency unchanged, and reduces the voltage peak value of the driving waveform by the preset adjusting voltage so as to adjust the erasing effect of the written content in the local area; or the controller controls the driving circuit to keep the preset voltage unchanged, and the frequency of the driving waveform is increased by the preset adjusting frequency so as to adjust the erasing effect of the written content in the local area.
Further, after the step B2 is completed, returning to the step S5 again to determine the erasing effect of the local area, if the erasing effect of the local area reaches the preset effect, saving the current frequency and voltage, if not, continuing to execute the steps B1-B2, and repeatedly executing the steps S5 to B2; until the control effect of the local area reaches the preset effect.
Fig. 3 is a schematic structural diagram of a liquid crystal display device according to the present invention. The liquid crystal display device 300 can be used to implement the erasing method of the liquid crystal display device.
As shown in fig. 3, the liquid crystal display device 300 includes:
a first input unit 301, configured to receive local erasure information for erasing a local area, which is input by a user.
Here, the partial erasure information may be a partial erasure signal, that is, when a user needs to perform partial erasure, a partial erasure signal is first input. Wherein the partial erasure information can be input through the first input unit 301. In this embodiment, the first input unit 301 may be an input device including, but not limited to, a key, a knob, a slider, and the like, which inputs a local erasing trigger signal. The input means may also be adapted to input a partial erasure intensity increasing signal, a partial erasure intensity decreasing signal, a full erasure intensity signal.
A control unit 302, configured to generate a corresponding control signal according to the local erasure information.
The control unit 302 includes a controller, which may be disposed in the liquid crystal display device, and is configured to transmit the local erasing information to the controller after receiving the local erasing information input by the user from the input device, and the controller generates the control signal according to the local erasing information after receiving the local erasing information, where the control signal is used to control a driving circuit in the liquid crystal display device.
And a driving unit 303 for outputting a driving waveform at a preset voltage and a preset frequency according to the control signal to drive the liquid crystal display device 300.
The driving unit 303 includes a driving circuit, which may be provided in the liquid crystal display device 300.
The driving waveform is a square wave and can be generated by a driving circuit in the liquid crystal display device 300. The driving circuit is connected with the controller, and outputs the driving waveform at a preset voltage and a preset frequency after receiving a control signal output by the controller. The driving waveform can control the liquid crystal molecules in the cholesteric liquid crystal film 200 in the liquid crystal display device to be in a metastable state, that is, the driving waveform output by the preset voltage and the preset frequency can make the liquid crystal molecules in the cholesteric liquid crystal film 200 in the liquid crystal display device 300 be in a metastable state.
And a second input unit 304, configured to receive an erasing operation for erasing the local area, which is input by a user.
The erasing operation can be inputted by a user using a finger or other soft object to perform a wiping action at a location to be locally erased (i.e., a local area referred to herein).
The determining unit 305 is configured to determine whether the erasing effect of the local area reaches a preset effect.
The preset effect may be that the written content in the local area boundary is erased, that is, the written content in the local area boundary disappears completely, and the written content outside the local area boundary (that is, the area of the display interface of the liquid crystal display device 300 except the local area) remains unchanged.
And an adjusting unit 306, configured to adjust the driving waveform in a preset method when the erasing effect of the local area does not reach the preset effect.
Optionally, the preset method may include:
keeping the preset frequency unchanged, and increasing the voltage peak value of the driving waveform by preset regulation voltage; alternatively, the frequency of the drive waveform is reduced at a preset regulation frequency while keeping the preset voltage constant.
Further, the preset method may include:
keeping the preset frequency unchanged, and reducing the voltage peak value of the driving waveform by using the preset adjusting voltage; alternatively, the frequency of the drive waveform is increased at a preset regulation frequency while keeping the preset voltage constant.
The erasing method of the liquid crystal display device of the present invention is explained below with an embodiment of the liquid crystal display device.
As shown in fig. 5, the liquid crystal display device 300 includes a cholesteric liquid crystal film 200, and the input device includes an erasing button 201, a partial erasing strength decreasing button 202, and a partial erasing strength increasing button 203. It is assumed that pressing the erase button 201 for a short time triggers a full erase signal, and pressing the erase button 201 for a long time triggers a partial erase signal.
The steps to implement a partial erase are as follows:
step 1, receiving writing contents input by a user on a cholesteric liquid crystal film 200, and displaying the input writing contents; the erasing key 201 is pressed for a long time, the erasing key 201 receives a local erasing signal and transmits the local erasing signal to the controller, and after the controller receives the local erasing signal, the controller outputs a control signal to control the driving circuit to output a driving waveform of a square wave to the cholesteric liquid crystal film 200 at a preset voltage and a preset frequency. At this time, the user uses a finger or other soft object to perform a wiping operation at a position to be locally wiped, and the local area can receive the wiping operation input by the user.
And 2, judging whether the erasing effect of the local area reaches a preset effect.
Step 3, if yes, entering step 4; if not, go to step 31 or step 32.
Step 31, if the written content is not locally erased well, that is, the erasing effect of the local area meets a first preset condition, pressing the increase local erasing strength key 203, outputting a signal for increasing the local erasing strength by the increase local erasing strength key 203, and transmitting the signal to the controller, wherein the controller controls the driving circuit to keep the preset frequency unchanged, and the voltage peak value of the driving waveform is increased by preset adjusting voltage; or the controller controls the driving circuit to keep the preset voltage unchanged, and reduces the frequency of the driving waveform at the preset adjusting frequency; and then returns to step 2.
Step 32, if the written content becomes too light or is completely removed, that is, the erasing effect of the local area meets a second preset condition, pressing the key 202 for reducing the local erasing intensity, wherein the key 202 for reducing the local erasing intensity generates a signal for reducing the local erasing intensity and transmits the signal to the controller, and the controller controls the driving circuit to keep the preset frequency unchanged, so as to reduce the voltage peak-to-peak value of the driving waveform by preset adjusting voltage; or keeping the preset voltage unchanged, and increasing the frequency of the driving waveform by the preset adjusting frequency; and then returns to step 2.
And 4, after the local erasing adjustment is finished, the controller stores the current voltage and frequency.
The invention provides an erasing method of a liquid crystal display device, which can well erase the local content of the liquid crystal display device by using the erasing method and solves the problems of poor local erasing effect or function failure caused by the instability of a diaphragm by utilizing the characteristic that cholesteric liquid crystal molecules can be converted into a conical state under the action of external force to enable handwriting to disappear when in a metastable state.
The above embodiments are merely illustrative of the technical ideas and features of the present invention, and are intended to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to limit the scope of the present invention. All equivalent changes and modifications made within the scope of the claims of the present invention should be covered by the claims of the present invention.
It will be understood that modifications and variations can be made by persons skilled in the art in light of the above teachings and all such modifications and variations are intended to be included within the scope of the invention as defined in the appended claims.
Claims (10)
1. An erasing method of a liquid crystal display device, comprising the steps of:
s1, receiving local erasing information of the local erasing area input by a user;
s2, generating a corresponding control signal according to the local erasing information;
s3, outputting a driving waveform at a preset voltage and a preset frequency according to the control signal to drive the liquid crystal display device;
s4, receiving an erasing operation of erasing the local area input by the user;
s5, judging whether the erasing effect of the local area reaches a preset effect or not;
and S6, if not, adjusting the driving waveform by a preset method.
2. An erasing method of a liquid crystal display device according to claim 1, further comprising:
and S7, if the erasing effect of the local area reaches a preset effect, storing the current voltage and the current frequency.
3. An erasing method of the liquid crystal display device according to claim 1, wherein the step S6 includes:
a1, if the erasing effect of the local area meets a first preset condition, receiving a signal for increasing the local erasing intensity input by a user;
and A2, adjusting the driving waveform by the preset method.
4. An erasing method of a liquid crystal display device according to claim 3, wherein the preset method comprises:
keeping the preset frequency unchanged, and increasing the voltage peak-to-peak value of the driving waveform by using preset adjusting voltage;
or keeping the preset voltage unchanged, and reducing the frequency of the driving waveform at a preset adjusting frequency.
5. An erasing method of the liquid crystal display device according to claim 1, wherein the step S6 includes:
b1, if the erasing effect of the local area meets a second preset condition, receiving a signal for reducing the local erasing intensity input by a user;
b2, adjusting the driving waveform by the preset method.
6. An erasing method of a liquid crystal display device according to claim 5, wherein the preset method comprises:
keeping the preset frequency unchanged, and reducing the voltage peak-to-peak value of the driving waveform by using preset adjusting voltage;
or keeping the preset voltage unchanged, and increasing the frequency of the driving waveform by a preset adjusting frequency.
7. An erasing method of an LCD device according to claim 4 or 6, characterized in that the preset adjusting voltage is: 0.1-0.5V.
8. A liquid crystal display device, comprising:
a first input unit for erasing local erasure information of a local area input by a user;
the control unit is used for generating a corresponding control signal according to the local erasing information;
the driving unit is used for outputting a driving waveform at a preset voltage and a preset frequency according to the control signal to drive the liquid crystal display device;
the second input unit is used for receiving an erasing operation of erasing the local area input by a user;
the judging unit is used for judging whether the erasing effect of the local area reaches a preset effect or not;
and the adjusting unit is used for adjusting the driving waveform by a preset method when the erasing effect of the local area does not reach the preset effect.
9. The liquid crystal display device according to claim 8, wherein the preset method comprises:
keeping the preset frequency unchanged, and increasing the voltage peak-to-peak value of the driving waveform by using preset adjusting voltage;
or keeping the preset voltage unchanged, and reducing the frequency of the driving waveform at a preset adjusting frequency.
10. The liquid crystal display device according to claim 8, wherein the preset method comprises:
keeping the preset frequency unchanged, and reducing the voltage peak-to-peak value of the driving waveform by using preset adjusting voltage;
or keeping the preset voltage unchanged, and increasing the frequency of the driving waveform by a preset adjusting frequency.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910834010.8A CN110703527B (en) | 2019-09-04 | 2019-09-04 | Liquid crystal display device and erasing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910834010.8A CN110703527B (en) | 2019-09-04 | 2019-09-04 | Liquid crystal display device and erasing method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110703527A true CN110703527A (en) | 2020-01-17 |
| CN110703527B CN110703527B (en) | 2022-11-11 |
Family
ID=69194177
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910834010.8A Active CN110703527B (en) | 2019-09-04 | 2019-09-04 | Liquid crystal display device and erasing method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110703527B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113345384A (en) * | 2021-05-28 | 2021-09-03 | 深圳市爱码讯实业发展有限公司 | Handwriting erasing method and system for handwriting board |
| CN113741078A (en) * | 2021-08-24 | 2021-12-03 | 山东蓝贝思特教装集团股份有限公司 | Liquid crystal writing device and method with adjustable local erasing effect |
Citations (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090096942A1 (en) * | 2007-07-31 | 2009-04-16 | Kent Displays Incorporated | Selectively erasable electronic writing tablet |
| CN106646977A (en) * | 2017-01-13 | 2017-05-10 | 深圳市好写科技有限公司 | Local-erasing liquid-crystal display device |
| CN107728398A (en) * | 2017-11-03 | 2018-02-23 | 贾培敏 | Liquid crystal board system and its method for deleting |
| CN107820582A (en) * | 2015-04-28 | 2018-03-20 | 唯酷有限公司 | Liquid crystal writing equipment |
| CN107943346A (en) * | 2017-11-24 | 2018-04-20 | 深圳市唯酷光电有限公司 | Coach of athletes handwriting pad and Coach of athletes hand writing system |
| CN108563049A (en) * | 2018-05-30 | 2018-09-21 | 山东蓝贝思特教装集团股份有限公司 | A kind of writing film of achievable selective erase and application |
| CN108828821A (en) * | 2018-06-28 | 2018-11-16 | 广州林登科技有限公司 | It is a kind of can selective erase liquid crystal writing device and selective erase method |
| CN208314427U (en) * | 2017-11-24 | 2019-01-01 | 陈文斌 | Device with local reduction cholesterol liquid crystal |
| CN109407385A (en) * | 2017-08-15 | 2019-03-01 | 肯特显示器公司 | The erasable electronic writing device of selectivity with user's adjustment |
| CN208622411U (en) * | 2018-07-24 | 2019-03-19 | 吴飞 | The drive system of bistable state multifunction electronic liquid crystal handwriting pad |
| CN109613735A (en) * | 2019-01-31 | 2019-04-12 | 深圳中电数码显示有限公司 | It is a kind of can selective erase liquid crystal blackboard |
| CN109696764A (en) * | 2017-10-23 | 2019-04-30 | 深圳市鸿合创新信息技术有限责任公司 | It is a kind of can selective erase liquid crystal writing plate and selective erase method |
| CN110146931A (en) * | 2018-06-26 | 2019-08-20 | 山东蓝贝思特教装集团股份有限公司 | A kind of liquid crystal writing film selective erase infrared location system |
| CN110147170A (en) * | 2018-06-11 | 2019-08-20 | 山东蓝贝思特教装集团股份有限公司 | For the multivoltage output circuit of writing film selective erase and application |
| CN110147171A (en) * | 2018-06-15 | 2019-08-20 | 山东蓝贝思特教装集团股份有限公司 | Liquid crystal writing film selective erase voltage generates and control method |
| CN110147016A (en) * | 2018-06-26 | 2019-08-20 | 山东蓝贝思特教装集团股份有限公司 | Selective erase electromagnetic positioning system and its method |
| CN110147006A (en) * | 2018-11-30 | 2019-08-20 | 山东蓝贝思特教装集团股份有限公司 | Realize voltage application system, method, liquid crystal writing film, board, blackboard and the drawing board of liquid crystal writing plate selective erase |
-
2019
- 2019-09-04 CN CN201910834010.8A patent/CN110703527B/en active Active
Patent Citations (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090096942A1 (en) * | 2007-07-31 | 2009-04-16 | Kent Displays Incorporated | Selectively erasable electronic writing tablet |
| CN107820582A (en) * | 2015-04-28 | 2018-03-20 | 唯酷有限公司 | Liquid crystal writing equipment |
| CN106646977A (en) * | 2017-01-13 | 2017-05-10 | 深圳市好写科技有限公司 | Local-erasing liquid-crystal display device |
| CN109407385A (en) * | 2017-08-15 | 2019-03-01 | 肯特显示器公司 | The erasable electronic writing device of selectivity with user's adjustment |
| CN109696764A (en) * | 2017-10-23 | 2019-04-30 | 深圳市鸿合创新信息技术有限责任公司 | It is a kind of can selective erase liquid crystal writing plate and selective erase method |
| CN107728398A (en) * | 2017-11-03 | 2018-02-23 | 贾培敏 | Liquid crystal board system and its method for deleting |
| CN107943346A (en) * | 2017-11-24 | 2018-04-20 | 深圳市唯酷光电有限公司 | Coach of athletes handwriting pad and Coach of athletes hand writing system |
| CN208314427U (en) * | 2017-11-24 | 2019-01-01 | 陈文斌 | Device with local reduction cholesterol liquid crystal |
| CN108563049A (en) * | 2018-05-30 | 2018-09-21 | 山东蓝贝思特教装集团股份有限公司 | A kind of writing film of achievable selective erase and application |
| CN110147170A (en) * | 2018-06-11 | 2019-08-20 | 山东蓝贝思特教装集团股份有限公司 | For the multivoltage output circuit of writing film selective erase and application |
| CN110147171A (en) * | 2018-06-15 | 2019-08-20 | 山东蓝贝思特教装集团股份有限公司 | Liquid crystal writing film selective erase voltage generates and control method |
| CN110146931A (en) * | 2018-06-26 | 2019-08-20 | 山东蓝贝思特教装集团股份有限公司 | A kind of liquid crystal writing film selective erase infrared location system |
| CN110147016A (en) * | 2018-06-26 | 2019-08-20 | 山东蓝贝思特教装集团股份有限公司 | Selective erase electromagnetic positioning system and its method |
| CN108828821A (en) * | 2018-06-28 | 2018-11-16 | 广州林登科技有限公司 | It is a kind of can selective erase liquid crystal writing device and selective erase method |
| CN208622411U (en) * | 2018-07-24 | 2019-03-19 | 吴飞 | The drive system of bistable state multifunction electronic liquid crystal handwriting pad |
| CN110147006A (en) * | 2018-11-30 | 2019-08-20 | 山东蓝贝思特教装集团股份有限公司 | Realize voltage application system, method, liquid crystal writing film, board, blackboard and the drawing board of liquid crystal writing plate selective erase |
| CN109613735A (en) * | 2019-01-31 | 2019-04-12 | 深圳中电数码显示有限公司 | It is a kind of can selective erase liquid crystal blackboard |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113345384A (en) * | 2021-05-28 | 2021-09-03 | 深圳市爱码讯实业发展有限公司 | Handwriting erasing method and system for handwriting board |
| CN113741078A (en) * | 2021-08-24 | 2021-12-03 | 山东蓝贝思特教装集团股份有限公司 | Liquid crystal writing device and method with adjustable local erasing effect |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110703527B (en) | 2022-11-11 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN112313083B (en) | Liquid crystal writing device with slow discharge erase | |
| CN109407385B (en) | Selectively erasable electronic writing instrument with user adjustment | |
| US8228301B2 (en) | Multiple color writing tablet | |
| CN110703527B (en) | Liquid crystal display device and erasing method thereof | |
| US9513743B2 (en) | Methods for driving electro-optic displays | |
| JP4862589B2 (en) | Electrophoretic display panel control device and electrophoretic display device | |
| US8305319B2 (en) | Liquid crystal display device having look up table for adjusting common voltages and driving method thereof | |
| JP5072973B2 (en) | Display device having dot matrix type display element and driving method thereof | |
| KR20080105595A (en) | Apparatus for setting a common voltage and method of setting the common voltage | |
| CN208314427U (en) | Device with local reduction cholesterol liquid crystal | |
| US9564104B1 (en) | Adjusting front light brightness during display updates | |
| JPS62165630A (en) | Drinving method for electrooptic device | |
| US20100134537A1 (en) | Design support method | |
| JP7145738B2 (en) | Beam direction controller | |
| CN116338997A (en) | Local erasing voltage control method and system for liquid crystal writing device | |
| JP5207644B2 (en) | Electrophoretic display device, control device, control method, and display system | |
| JP5183937B2 (en) | Electrophoretic display device, control device, driving method of electrophoretic display panel, and display system | |
| JP5332339B2 (en) | Display device | |
| CN117452729B (en) | Erasing control method and device for liquid crystal writing device | |
| JP5430403B2 (en) | Method for driving ferroelectric liquid crystal panel and liquid crystal display device | |
| CN113296643B (en) | Electronic writing equipment, system and writing handwriting erasing method | |
| CN212721989U (en) | Liquid crystal screen testing device with liquid crystal screen equipment | |
| JP2002107695A (en) | Liquid crystal display device | |
| CN117572680A (en) | Local erasing control method and device for liquid crystal writing device | |
| JP5035015B2 (en) | Display device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |