CN208207773U - For the multivoltage output circuit of writing film selective erase and application - Google Patents
For the multivoltage output circuit of writing film selective erase and application Download PDFInfo
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- CN208207773U CN208207773U CN201820901010.6U CN201820901010U CN208207773U CN 208207773 U CN208207773 U CN 208207773U CN 201820901010 U CN201820901010 U CN 201820901010U CN 208207773 U CN208207773 U CN 208207773U
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- 239000004973 liquid crystal related substance Substances 0.000 abstract description 24
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- 230000007812 deficiency Effects 0.000 abstract description 3
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Abstract
The utility model discloses a kind of for the multivoltage output circuit of writing film selective erase and application, comprising: main controller and booster circuit, wherein main controller generates control signal；Voltage needed for the control signal that booster circuit is generated according to main controller generates corresponding erasing impression, voltage needed for the booster circuit exports two or more erasing impressions, the relative voltage difference formed using voltage needed for above-mentioned two or more than two erasing impressions, erasing electric field is constituted, realizes impression erasing.The utility model is the utility model has the advantages that can be realized the regional area erasing for written contents, and other regions are not influenced then by erasing, the deficiency all wiped can only be realized by overcoming traditional technology, it is particularly suitable for the biggish selective erase for writing membrane structure of write area, the working efficiency and usage experience of user are improved, the commercial value of liquid crystal writing film and its application apparatus is improved.
Description
Technical field
The utility model relates to liquid crystal film technical field of structures, more particularly to a kind of for the more of writing film selective erase
Voltage follower circuit and application.
Background technique
Liquid crystal writing film on the market at present, its working principle is that using the bistable characteristic of liquid crystal realize display and/or
Wipe the written contents on liquid crystal board.Such as using cholesteric liquid crystal as writing film, by acting on liquid crystal board
Pressure record the writing pressure trajectories of lettering pen, and then show corresponding written contents；Make cholesteric phase by applying electric field
Liquid crystal structure changes, and so that the writing pressure trajectories on liquid crystal board is disappeared to realize erasing.
The existing product using liquid crystal writing film is only capable of using the power on mode and realize entirely when carrying out handwriting erasing
The erasing of all person's handwritings in liquid crystal writing plate, when only needing erasing part writing such as user, then existing energization erasing mode can not
Meet needs, when especially modifying to the vicious part of writing, existing entirety erasing mode will will cause remaining not
The loss of modification information is needed, the mode that how to use the power on realizes that part wipes, becomes user's problem in the urgent need to address.
Current writing film voltage control circuit is only conductive layer and provides single voltage, using between two conductive layers
The electric field of formation realizes the whole erasing to region is write.This circuit form can not achieve applies different conductive regions respectively
Making alive can not form the effective voltage control to different selective erase regions, can not achieve the purpose of selective erase.
This voltage control circuit simultaneously, by the way of single channel boosting, the fluctuation of the voltage value exported in this way is larger, no
Conducive to voltage stabilization.
Utility model content
First purpose of the utility model is to disclose a kind of multivoltage output circuit for writing film selective erase, the electricity
Road can control simultaneously generates the different voltage of multichannel, to realize the selective erase function of specifying region to writing film, leads to simultaneously
It crosses two-way or the above voltage of two-way merges the mode of output, can guarantee stable output voltage.
To achieve the goals above, the utility model adopts the following technical solution:
First purpose of the utility model be a kind of multivoltage output circuit for writing film selective erase is disclosed, including
Main controller and booster circuit, wherein main controller generates control signal；Booster circuit is generated according to the control signal that main controller generates
Voltage needed for corresponding erasing impression, voltage needed for the booster circuit exports two or more erasing impressions,
The relative voltage difference formed using voltage needed for above-mentioned two or more than two erasing impressions, is constituted erasing electric field, realizes pressure
Trace erasing.
Further, the booster circuit includes one or more than one voltage generating unit, and the voltage generates
Unit includes one or more than one inductance boost circuit；The input terminal of each inductance boost circuit receives main controller
Signal is controlled, output end exports a required voltage.
Preferably, the inductance boost circuit is two, and the input terminal of each inductance boost circuit receives main controller
Signal is controlled, the output end superposition of two inductance boost circuits exports a required voltage signal.
Further, the inductance boost circuit is three or three or more, the input terminal of each inductance boost circuit
The control signal of main controller is received, the output end superposition of all inductance boost circuits exports a required voltage signal.
Further, when the voltage generating unit includes two inductance boost circuits, specific structure are as follows:
The tap of the collector connection inductance L2 of the base series resistor R2 of triode Q1, triode Q1, triode Q1's
Emitter ground connection；One end of inductance L2 connects power supply, and the other end connects the anode of diode D2, and the cathode of diode D2 is successively gone here and there
It is grounded after connection resistance R1 and resistance R4；Polar capacitor E1 and capacitor C2 is connected in parallel on the series arm of resistance R1 and resistance R4 respectively
The anode at both ends, polar capacitor E1 is connect with the cathode of diode D2, other end ground connection；One end of capacitor C2 is with diode D2's
Cathode connection, other end ground connection；
The cathode of diode D2 is connect with the cathode of diode D1, one end of the anode connection inductance L1 of diode D1, electricity
The other end for feeling L1 connects power supply；The pumping of the collector connection inductance L1 of the base series resistor R3 of triode Q2, triode Q2
Head, the emitter ground connection of triode Q2.
Two-way voltage is overlapped after complementation and is finally needed in such a way that at least two-way boosts by the utility model
Selective erase voltage, be able to solve the unstable problem of output voltage caused by single channel boosting.
Further, the output end voltage of the voltage generating unit is input to main controller, main controller root after partial pressure
The output for adjusting control signal in real time according to the voltage received stablizes the output end voltage of voltage generating unit.
Master controller is fed back to after output end voltage is divided, master controller adjusts control letter according to the voltage of feedback in real time
Number output, to guarantee output end voltage all-the-time stable voltage needed for wiping impression.
Further, the control signal of the main controller output is pwm signal, by controlling the frequency of pwm signal and accounting for
Empty ratio realizes the control to output voltage amplitude.
Second purpose of the utility model be disclose it is a kind of with multivoltage output circuit have selective erase function
Writing film, comprising: the above-mentioned multivoltage output circuit for writing film selective erase；
The first conductive layer or the second conductive layer of writing film one of them be divided into two or more mutually it is exhausted
The strip-shaped conductive region of edge；
The output end of multivoltage output circuit is electrically connected with each conductive region and not divided conductive layer respectively.
The utility model, which changes existing writing film, can only realize the status integrally wiped, by the segmentation to conductive layer,
Writing film is divided into the erasable region in several parts, the voltage exported by multivoltage output circuit is in the erasable region in part
Erasing electric field is formed, realizes selective erase.
In view of processing cost and the complexity of technique, conductive layer is divided into strip-shaped conductive area by the utility model
Domain is conducive to improve processing efficiency, reduces process costs, convenient for batch production.
The purpose of third of the utility model be disclose it is a kind of with multivoltage output circuit have selective erase function
Writing film, comprising: the above-mentioned multivoltage output circuit for writing film selective erase；
The first conductive layer and the second conductive layer of writing film are each split into leading for two or more mutually insulateds
Electric region；
Each conductive region of first conductive layer is distributed along first direction, is parallel to each other；Second conductive layer it is each
Conductive region is distributed in a second direction, is parallel to each other, and first direction and second direction are spatially interlaced；
The output end of multivoltage output circuit respectively with each conductive region on the first conductive layer and the second conductive layer
Electrical connection.
Upper layer and lower layer conductive layer is split respectively, the voltage of such multivoltage output circuit output can apply respectively
In the different conductive regions of upper and lower two conductive layer, using the voltage difference of the conductive region of the upper and lower interlaced part of two conductive layers,
Erasing electric field is formed, selective erase is realized, improves the accuracy of selective erase.
The partitioning scheme that the utility model provides can make to divide according to actual needs convenient for industrial mass processing
Region miniaturization realizes more accurate selective erase by the energization to different conductive regions.
4th purpose of the utility model is to disclose a kind of board, including the above-mentioned tool with multivoltage output circuit
There is the writing film of selective erase function；
Further,
The board further include:
Person's handwriting storage unit, for directly recording and storing handwriting trace information；Alternatively, converting standard for handwriting trace
Character or test pattern simultaneously store；
Further, the board further include:
Person's handwriting storage unit, for directly recording and storing handwriting trace information；Alternatively, converting standard for handwriting trace
Character or test pattern simultaneously store；
Communication unit, for being communicated with external equipment, by the handwriting trace information or standard character of storage or
Test pattern is sent to external equipment.
5th purpose of the utility model is to disclose a kind of blackboard, including above-mentioned having with multivoltage output circuit
The writing film of selective erase function；
Further,
The blackboard further include:
Person's handwriting storage unit, for directly recording and storing handwriting trace information；Alternatively, converting standard for handwriting trace
Character or test pattern simultaneously store；
Further, the blackboard further include:
Person's handwriting storage unit, for directly recording and storing handwriting trace information；Alternatively, converting standard for handwriting trace
Character or test pattern simultaneously store；
Communication unit, for being communicated with external equipment, by the handwriting trace information or standard character of storage or
Test pattern is sent to external equipment.
6th purpose of the utility model is to disclose a kind of drawing board, including above-mentioned having with multivoltage output circuit
The writing film of selective erase function；
Further,
The drawing board further include:
Person's handwriting storage unit, for directly recording and storing handwriting trace information；Alternatively, converting standard for handwriting trace
Character or test pattern simultaneously store；
Further, the drawing board further include:
Person's handwriting storage unit, for directly recording and storing handwriting trace information；Alternatively, converting standard for handwriting trace
Character or test pattern simultaneously store；
Communication unit, for being communicated with external equipment, by the handwriting trace information or standard character of storage or
Test pattern is sent to external equipment.
Compared with prior art, the utility model has the beneficial effects that
The utility model will at least two-way voltage be obtained finally by the way of the boosting of at least two-way after being overlapped complementation
Selective erase voltage required for impression is clashed, can make up for it the unstable deficiency of output voltage caused by single channel boosting.
Liquid crystal writing film is divided into several erasing regions by the utility model, by multivoltage output circuit export two or
The more than two voltages of person form required erasing electric field to wipe region in advance in liquid crystal writing film, can be realized to liquid crystal book
The regional area erasing of written contents on film is write, and other regions are not influenced then by erasing, overcoming traditional technology can only realize
The deficiency all wiped, improves the working efficiency and usage experience of user, improves liquid crystal writing film and its application apparatus
Commercial value.
Detailed description of the invention
The accompanying drawings constituting a part of this application is used to provide further understanding of the present application, and the application's shows
Meaning property embodiment and its explanation are not constituted an undue limitation on the present application for explaining the application.
Fig. 1 (a) is the utility model single channel inductance boost electrical block diagram；
Fig. 1 (b) is the utility model single channel inductance boost schematic illustration；
Fig. 2 is the utility model two-way inductance boost electrical block diagram；
Fig. 3 is the utility model two-way inductance boost schematic illustration；
Fig. 4 is three road inductance boost electrical block diagram of the utility model；
Fig. 5 is three road inductance boost schematic illustration of the utility model；
Fig. 6 is one main controller schematic diagram of the utility model embodiment；
Fig. 7 is the writing membrane structure diagram of the utility model embodiment two；
Fig. 8 is the writing membrane structure diagram of the utility model embodiment three.
Specific embodiment
It is noted that following detailed description is all illustrative, it is intended to provide further instruction to the application.Unless another
It indicates, all technical and scientific terms used herein has usual with the application person of an ordinary skill in the technical field
The identical meanings of understanding.
It should be noted that term used herein above is merely to describe specific embodiment, and be not intended to restricted root
According to the illustrative embodiments of the application.As used herein, unless the context clearly indicates otherwise, otherwise singular
Also it is intended to include plural form, additionally, it should be understood that, when in the present specification using term "comprising" and/or " packet
Include " when, indicate existing characteristics, step, operation, device, component and/or their combination.
Embodiment one
The utility model embodiment discloses a kind of multivoltage output circuit for writing film selective erase, such as Fig. 1 institute
Show, comprising: main controller and booster circuit interconnected.
Main controller is main control MCU, for generating control signal and exporting to booster circuit.
Voltage needed for the control signal that booster circuit is generated according to main controller generates corresponding erasing impression, the boosting
Voltage needed for the two or more erasing impressions of circuit output, using needed for above-mentioned two or more than two erasing impressions
Voltage formed relative voltage difference, constitute erasing electric field, realize impression erasing.
Booster circuit includes one or more than one voltage generating unit, each voltage generating unit can root
Voltage all the way is generated according to the control signal of main controller.
Main controller is to each voltage generating unit output pwm signal, by the phase difference and duty that control pwm signal
Than controlling voltage value caused by voltage generating unit.
Each voltage generating unit includes one or more than one inductance boost circuit；Each inductance boost electricity
The input terminal on road receives the pwm signal of main controller output, and output end exports a required voltage.
The voltage generating unit of the utility model can be realized by inductance boost circuit all the way and be boosted that inductance boost is electric all the way
Shown in road schematic diagram such as Fig. 1 (a), by controlling the phase difference and duty ratio of PWM11, the voltage amplitude of control output end Vout output
Value；When using inductance boost circuit all the way, shown in control waveform principle isoboles such as Fig. 1 (b), as seen from the figure, output end vo ut
The fluctuation of voltage magnitude is larger, is unfavorable for voltage stabilization.
The voltage generating unit of the utility model can also realize boosting by two-way or the above inductance boost circuit of two-way,
It is superimposed as a voltage value output per the output voltage of inductance boost circuit all the way, is conducive to the stabilization of voltage in this way, avoids
The occurrence of output end voltage fluctuates.
As preferred embodiment, the utility model voltage generating unit uses the form of two-way inductance boost circuit
When, specific structure is as shown in Figure 2, comprising: the collector of the base series resistor R2 of triode Q1, triode Q1 connect inductance L2
Centre tap, triode Q1 emitter ground connection；One end of inductance L2 connects input power, and the other end connects diode D2's
Anode, the cathode of diode D2 are grounded after being sequentially connected in series resistance R1 and resistance R4；Polar capacitor E1 and capacitor C2 are connected in parallel on respectively
The anode at the both ends of the series arm of resistance R1 and resistance R4, polar capacitor E1 is connect with the cathode of diode D2, another termination
Ground；One end of capacitor C2 is connect with the cathode of diode D2, other end ground connection；
The cathode of diode D2 is also connect with the cathode of diode D1, one end of the anode connection inductance L1 of diode D1,
The other end of inductance L1 connects input power；The collector of the base series resistor R3 of triode Q2, triode Q2 connect inductance
The centre tap of L1, the emitter ground connection of triode Q2.
In Fig. 2, voltage generating unit is made of two-way inductance boost circuit, is inductance L1, diode D1, resistance respectively
R3, triode Q2 are formed all the way, and inductance L2, diode D2, resistance R2, triode Q1 form another way；Two-way inductance boost electricity
The input signal on road is respectively to come the PWM1-1 and PWM1-2 of master, after the output signal superposition of two-way inductance boost circuit
Corresponding voltage is exported in output end vo ut.By adjusting the duty ratio and phase difference of each pwm signal, to control per all the way
The amplitude and phase of inductance boost circuit output voltage, to guarantee the voltage of two-way inductance boost circuit output after superposition
It can obtain required burning voltage.
If be used only wherein all the way inductance boost circuit when, the fluctuation for exporting the voltage value of Vout is larger, is unfavorable for electricity
Pressure is stablized；And after increasing another way boost network circuit, by adjusting the PWM1-1 and PWM1-2 of two-way boost network circuit
Phase difference and duty ratio distribution condition make the voltage stabilization of final output in setting value, control waveform principle isoboles such as Fig. 3
It is shown, two-way voltage is respectively formed by PWM1-1 and PWM1-2, the two-way voltage of output has a fluctuation, but two-way voltage into
After the superposition of row amplitude, it is capable of forming a stable voltage value, the bold portion being such as finally superimposed.
Voltage required for obtaining after superposition is simultaneously output to Vout, and E1, C2 are filter capacitor, resistance R1 and R4 composition
The resistor voltage divider network of output voltage values detection, output voltage is after resistance R1 and R4 partial pressure, after output end adc1 will be divided
Voltage Feedback to master controller, master controller adjusts accounting for for PWM1-1 and PWM1-2 according to the feedback voltage received in real time
Sky ratio and phase difference, to achieve the purpose that voltage value needed for capable of stablizing output.
The utility model voltage generating unit use three road inductance boost circuits form when, specific structure as shown in figure 4,
The input signal of three road inductance boost circuits is respectively to come PWM2-0, PWM2-1 and PWM2-2 of master, by adjusting every
The duty ratio and phase difference of one pwm signal, to control amplitude and phase per inductance boost circuit output voltage all the way, thus
Guarantee that the voltage of three road inductance boost circuit outputs can obtain required burning voltage after superposition.Fig. 5 gives three tunnels
A kind of embodiment of voltage superposition is respectively formed three road voltages, the three roads electricity of output by PWM2-0, PWM2-1 and PWM2-2
Pressure has fluctuation, but after three road voltages carry out amplitude superposition, is capable of forming a stable voltage value, the reality being such as finally superimposed
Line part.
Form using three road inductance boost circuits can not only overcome the problems, such as that output voltage fluctuates, and generate stable defeated
Voltage out, and it is able to ascend the size of output electric current, increase the carrying load ability of multivoltage output circuit.
The utility model embodiment includes three road voltage generating units with booster circuit, per voltage generating unit all the way by two
Road inductance boost circuit is illustrated for being boosted, and the structure of three road voltage generating units is identical with working principle；This reality
It applies in example, the model SM59R16A5C of main control chip, as shown in fig. 6, can be realized of can knowing of those skilled in the art
Other main control chips of the utility model function are also within the protection scope of the utility model.
Main control chip the 18th, 19,20,23,24,25 pins connect respectively with three road voltage generating units, for produce 6
Road pwm signal, control generate the voltage that three tunnel sizes can arbitrarily change, and voltage swing is determined by the frequency and duty ratio of pwm signal
It is fixed；Main control chip the 40th, 41,42 pins respectively with the output voltage values of three road voltage generating units detection voltage-splitter resistance net
Network connection, for the output voltage values of three road inductance boost circuit of real-time detection, adjusts PWM's to feed back to main control chip in real time
Signal output, so that the output specific voltage value in three tunnels can be stablized by reaching.For example, booster circuit includes that 3 voltages generate list
Member receives two-way pwm signal per voltage generating unit all the way respectively, in this way, booster circuit can generate the voltage of three settings,
This 3 voltages are respectively applied to the different conductive regions of two conductive layers of writing film, so that needed for erasing region is formed in advance
Erasing electric field, realize selective erase.
Embodiment two
The utility model embodiment on the basis of example 1, discloses a kind of having with multivoltage output circuit
The liquid crystal writing film of selective erase function.
Wherein, the structure for the multivoltage output circuit of writing film selective erase is the same as example 1, writing film
Structure as shown in fig. 7, comprises: the first conductive layer, liquid crystal layer and the second conductive layer successively arranged from top to bottom；
Wherein, the first conductive layer is divided into three strip-shaped conductive regions being parallel to each other, and the second conductive layer is not divided；The
The overlapped part of conductive region and the second conductive layer on one conductive layer formed the first erasing region, the second erasing region and
Third wipes region.
Each conductive region and the second conductive layer difference on the output end of multivoltage output circuit and the first conductive layer
Electrical connection.
If it is desired to the content in the second erasing of erasing region, then by each conductive region of the first conductive layer and second
Conductive layer applies the voltage of setting respectively, clashes region, the second erasing region and third erasing region first and is respectively formed electricity
, also, can satisfy the complete erasing to the region content in the electric field that the second erasing region is formed, and in the first scratching area
It is impossible to meet the complete erasings to the region content for the electric field that domain and third erasing region are formed；Second is only wiped to realize
The content in erasing region, and the purpose that the content in remaining erasing region can not be wiped free of.
Embodiment three
The utility model embodiment on the basis of example 1, discloses a kind of having with multivoltage output circuit
The liquid crystal writing film of selective erase function.
Wherein, the structure for the multivoltage output circuit of writing film selective erase is the same as example 1, writing film
Structure is as shown in Figure 8, comprising:
The first conductive layer, liquid crystal layer and the second conductive layer successively arranged from top to bottom；Wherein, the first conductive layer is divided into
Second conductive layer is divided into longitudinal conductive region of several mutually insulateds by the transverse conductance region of several mutually insulateds, and
Each conductive region is equidistant；Conductive region on first conductive layer and the conductive region on the second conductive layer spatially phase
Mutual vertical interlaced.By the division to conductive layer, writing film is divided into reticular structure, each grid is one individual
Wipe region.
The output end of multivoltage output circuit is electrically connected with each conductive region on two conductive layers.
The voltage for applying setting respectively by each conductive region to two conductive layers respectively wipes region difference shape in writing film
At electric field, controls and can satisfy the complete erasing to the region content in the electric field that erasing region is formed in advance, and remaining scratching area
The electric field that domain is formed realizes the purpose of selective erase it is impossible to meet the complete erasing to corresponding region content.
Example IV
The utility model embodiment is disclosed and is had on the basis of embodiment one or embodiment two or embodiment three
The concrete application of the writing film with selective erase function of multivoltage output circuit, such as:
The writing film with selective erase function with multivoltage output circuit of the utility model is applied to write
On plate, the selective erase function of board is realized.
Further, the existing liquid crystal board remembered, for example, being incuded when writing by resistance type touch control screen
Pressure calculates pressure position, feeds back simultaneously pen trace track, realizes the storage of handwriting trace；Alternatively, converting handwriting trace to
Standard character is stored.
The writing film with selective erase function with multivoltage output circuit of the utility model is applied to above-mentioned
The liquid crystal board that can be remembered, realizes the function of selective erase.
Further, communication unit is set on the above-mentioned board that there is selective erase function simultaneously with memory function
Member is communicated by way of wired or wireless communication with external equipment.
External equipment can be the mobile terminals such as mobile phone, PAD, and being also possible to PC machine or those skilled in the art can think
The other equipment terminal arrived.
Similarly, the writing film with selective erase function with control circuit of the utility model can also be applied to
Other blackboards that can be remembered are perhaps on drawing board and can be by the handwriting trace information or standard character or test pattern of storage
External equipment is sent to by communication unit.
The utility model is had selective erase function with multivoltage output circuit by alternatively embodiment
Can writing film be applied to luminous energy board, luminous energy liquid crystal handwriting pad, the big liquid crystal writing blackboard of luminous energy, luminous energy dust-free writing board,
Luminous energy Portable blackboard, electronic drawing board, LCD electronic writing plate, electronic handwritten plate, electronic recording notebook, drawing pad, children are hand-written
Plate, allowing child daubing drawing board, erasing rubber function sketching board, liquid crystal electron drawing boards or color liquid crystal handwriting pad or this field skill
In other Related products that art personnel can be known, to realize the selective erase function of the said goods.
The foregoing is merely preferred embodiment of the present application, are not intended to limit this application, for the skill of this field
For art personnel, various changes and changes are possible in this application.Within the spirit and principles of this application, made any to repair
Change, equivalent replacement, improvement etc., should be included within the scope of protection of this application.
Claims (12)
1. a kind of multivoltage output circuit for writing film selective erase, including main controller and booster circuit, wherein main controller
Generate control signal；Voltage needed for the control signal that booster circuit is generated according to main controller generates corresponding erasing impression,
It is characterized in that, voltage needed for the booster circuit exports two or more erasing impressions.
2. a kind of multivoltage output circuit for writing film selective erase as described in claim 1, which is characterized in that described
Booster circuit include one perhaps the more than one voltage generating unit voltage generating unit include one or one with
On inductance boost circuit；The input terminal of each inductance boost circuit receives the control signal of main controller, output end output one
A required voltage.
3. a kind of multivoltage output circuit for writing film selective erase as claimed in claim 2, which is characterized in that described
Inductance boost circuit is two, and the input terminal of each inductance boost circuit receives the control signal of main controller, two inductance liters
The output end of volt circuit is superimposed, and exports a required voltage signal.
4. a kind of multivoltage output circuit for writing film selective erase as claimed in claim 2, which is characterized in that described
Inductance boost circuit is three or three or more, and the input terminal of each inductance boost circuit receives the control signal of main controller,
The output end of all inductance boost circuits is superimposed, and exports a required voltage signal.
5. a kind of multivoltage output circuit for writing film selective erase as claimed in claim 2, which is characterized in that described
Voltage generating unit includes two inductance boost circuits, specific structure are as follows:
The tap of the collector connection inductance L2 of the base series resistor R2 of triode Q1, triode Q1, the transmitting of triode Q1
Pole ground connection；One end of inductance L2 connects power supply, and the other end connects the anode of diode D2, and the cathode of diode D2 is sequentially connected in series electricity
It is grounded after resistance R1 and resistance R4；Polar capacitor E1 and capacitor C2 is connected in parallel on the two of the series arm of resistance R1 and resistance R4 respectively
The anode at end, polar capacitor E1 is connect with the cathode of diode D2, other end ground connection；One end of capacitor C2 and bearing for diode D2
Pole connection, other end ground connection；
The cathode of diode D2 is connect with the cathode of diode D1, one end of the anode connection inductance L1 of diode D1, inductance L1
The other end connect power supply；The tap of the collector connection inductance L1 of the base series resistor R3 of triode Q2, triode Q2, three
The emitter of pole pipe Q2 is grounded.
6. a kind of multivoltage output circuit for writing film selective erase as claimed in claim 2, which is characterized in that described
The output end voltage of voltage generating unit is input to main controller after partial pressure, and main controller adjusts in real time according to the voltage received
The output for controlling signal stablizes the output end voltage of voltage generating unit.
7. a kind of multivoltage output circuit for writing film selective erase as claimed in any one of claims 1 to 6, feature
It is, the control signal of the main controller output is pwm signal.
8. a kind of writing film with selective erase function with multivoltage output circuit characterized by comprising right is wanted
Seek the described in any item multivoltage output circuits for writing film selective erase of 1-6；
The first conductive layer or the second conductive layer of writing film one of them be divided into two or more mutually insulateds
Strip-shaped conductive region；
The output end of multivoltage output circuit is electrically connected with each conductive region and not divided conductive layer respectively.
9. a kind of writing film with selective erase function with multivoltage output circuit characterized by comprising right is wanted
Seek the described in any item multivoltage output circuits for writing film selective erase of 1-6；
The first conductive layer and the second conductive layer of writing film are each split into the conduction region of two or more mutually insulateds
Domain；
Each conductive region of first conductive layer is distributed along first direction, is parallel to each other；Each conduction of second conductive layer
Region is distributed in a second direction, is parallel to each other, and first direction and second direction are spatially interlaced；
The output end of multivoltage output circuit is electrically connected with each conductive region on the first conductive layer and the second conductive layer respectively
It connects.
10. a kind of board, which is characterized in that described in any item with multivoltage output circuit including claim 8-9
Writing film with selective erase function；
Further,
The board further include:
Person's handwriting storage unit, for directly recording and storing handwriting trace information；Alternatively, converting standard character for handwriting trace
Or it test pattern and stores；
Further, the board further include:
Person's handwriting storage unit, for directly recording and storing handwriting trace information；Alternatively, converting standard character for handwriting trace
Or it test pattern and stores；
Communication unit, for being communicated with external equipment, by the handwriting trace information or standard character or standard of storage
Figure is sent to external equipment.
11. a kind of blackboard, which is characterized in that including the described in any item tools with multivoltage output circuit of claim 8-9
There is the writing film of selective erase function；
Further,
The blackboard further include:
Person's handwriting storage unit, for directly recording and storing handwriting trace information；Alternatively, converting standard character for handwriting trace
Or it test pattern and stores；
Further, the blackboard further include:
Person's handwriting storage unit, for directly recording and storing handwriting trace information；Alternatively, converting standard character for handwriting trace
Or it test pattern and stores；
Communication unit, for being communicated with external equipment, by the handwriting trace information or standard character or standard of storage
Figure is sent to external equipment.
12. a kind of drawing board, which is characterized in that including the described in any item tools with multivoltage output circuit of claim 8-9
There is the writing film of selective erase function；
Further,
The drawing board further include:
Person's handwriting storage unit, for directly recording and storing handwriting trace information；Alternatively, converting standard character for handwriting trace
Or it test pattern and stores；
Further, the drawing board further include:
Person's handwriting storage unit, for directly recording and storing handwriting trace information；Alternatively, converting standard character for handwriting trace
Or it test pattern and stores；
Communication unit, for being communicated with external equipment, by the handwriting trace information or standard character or standard of storage
Figure is sent to external equipment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820901010.6U CN208207773U (en) | 2018-06-11 | 2018-06-11 | For the multivoltage output circuit of writing film selective erase and application |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820901010.6U CN208207773U (en) | 2018-06-11 | 2018-06-11 | For the multivoltage output circuit of writing film selective erase and application |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208207773U true CN208207773U (en) | 2018-12-07 |
Family
ID=64497538
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820901010.6U Active CN208207773U (en) | 2018-06-11 | 2018-06-11 | For the multivoltage output circuit of writing film selective erase and application |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208207773U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109597259A (en) * | 2019-01-30 | 2019-04-09 | 深圳市恒开源电子有限公司 | Can selective erase liquid crystal handwriting pad and erasing apparatus |
| 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 |
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| WO2019227942A1 (en) * | 2018-05-30 | 2019-12-05 | 山东蓝贝思特教装集团股份有限公司 | Liquid crystal writing film capable of implementing local erasure, local erasure method, multi-voltage output circuit, and positioning system |
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| WO2019227942A1 (en) * | 2018-05-30 | 2019-12-05 | 山东蓝贝思特教装集团股份有限公司 | Liquid crystal writing film capable of implementing local erasure, local erasure method, multi-voltage output circuit, and positioning system |
| US11137899B2 (en) | 2018-05-30 | 2021-10-05 | Shandong Lanbeisite Educational Equipment Group | Liquid crystal writing film, partial erasing method, multi-voltage output circuit and positioning system capable of partial erasing |
| 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 |
| CN110147170B (en) * | 2018-06-11 | 2024-04-12 | 山东蓝贝思特教装集团股份有限公司 | Multi-voltage output circuit for writing film local erasure and application |
| CN109597259A (en) * | 2019-01-30 | 2019-04-09 | 深圳市恒开源电子有限公司 | Can selective erase liquid crystal handwriting pad and erasing apparatus |
| CN110273322A (en) * | 2019-06-20 | 2019-09-24 | 京东方科技集团股份有限公司 | Nanometer paper and preparation method, the method and electronic equipment that carry out graphics process |
| CN110273322B (en) * | 2019-06-20 | 2022-04-26 | 京东方科技集团股份有限公司 | Nano paper, preparation method, method for carrying out graphic processing and electronic equipment |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| IP01 | Partial invalidation of patent right |
Commission number: 5W131633 Conclusion of examination: Declare claims 1-7 of utility model number 20182090110.6 invalid, and continue to maintain the validity of the patent on the basis of claims 8-12 Decision date of declaring invalidation: 20230905 Decision number of declaring invalidation: 563447 Denomination of utility model: Multi voltage output circuit and application for local erasure of writing film Granted publication date: 20181207 Patentee: SHANDONG LANBEISITE EDUCATIONAL EQUIPMENT Group|SHANDONG LANBEI YISHU INFORMATION TECHNOLOGY CO.,LTD. |