CN106205541A - Drive circuit, driving method and display device - Google Patents
Drive circuit, driving method and display device Download PDFInfo
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- CN106205541A CN106205541A CN201610815016.7A CN201610815016A CN106205541A CN 106205541 A CN106205541 A CN 106205541A CN 201610815016 A CN201610815016 A CN 201610815016A CN 106205541 A CN106205541 A CN 106205541A
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
- G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
- G09G3/3611—Control of matrices with row and column drivers
- G09G3/3648—Control of matrices with row and column drivers using an active matrix
- G09G3/3651—Control of matrices with row and column drivers using an active matrix using multistable liquid crystals, e.g. ferroelectric liquid crystals
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- Crystallography & Structural Chemistry (AREA)
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Abstract
The present invention provides a kind of drive circuit, driving method and display device.Described drive circuit includes control unit and display driver element, described display driver element is for generating and export the square wave display control signal with fixed frequency and the square wave public electrode voltages signal with fixed frequency according to the frequency control signal of control unit output, this square wave display control signal and this square wave public electrode voltages signal are sent to multistable state liquid srystal display floater so that multistable state liquid srystal display floater according to square wave display control signal and square wave public electrode voltages signal to be in corresponding display state；The frequency of square wave display control signal is equal with the frequency of square wave public electrode voltages signal；The amplitude of square wave display control signal is more than predetermined amplitude.The present invention can be with the display state of the switching multistable state liquid srystal display floater of simple and quick low cost.
Description
Technical field
The present invention relates to show actuation techniques field, particularly relate to a kind of drive circuit, driving method and display device.
Background technology
Display panels typically requires and designs hardware driving circuit according to different liquid crystal materials, and its function is mainly
LCD (liquid crystal display) is made to show normal graphic image, to carry out the detection and the checking that show.Hardware at traditional LCD
In drive circuit scheme, display module is made up of three parts, TCON (time schedule controller) output display signal and various sequential, with
LCD Driver IC (drive integrated circult) docks, and Power IC (power IC) provides various supply voltage, P-
Gamma (Gamma (gamma) voltage generator) exports Gamma voltage.
The existing drive circuit being applied to multistable state liquid srystal display floater can not control list by display driver element
Under the control of the frequency control signal of unit's output, generate the square wave display control letter with different fixed frequency with amplitude
Number, thus multistable state liquid srystal display floater can not be controlled easily by display driver element and be in different display states.
Summary of the invention
A kind of drive circuit of offer, driving method and display device are provided, existing to solve
It is applied to the frequency control that the drive circuit of multistable state liquid srystal display floater can not be exported in control unit by display driver element
Under the control of signal processed, generate the square wave display control signal with different fixed frequency with amplitude, thus can not lead to
Cross display driver element and control the problem that multistable state liquid srystal display floater is in different display states easily.
In order to achieve the above object, the invention provides a kind of drive circuit, be applied to multistable state liquid srystal display floater, bag
Include control unit and show driver element, wherein,
Described control unit, is connected with described display driver element, for described display driver element output frequency control
Signal processed；
Described display driver element, is used for generating and export the square wave with fixed frequency according to described frequency control signal
Display control signal and the square wave public electrode voltages signal with fixed frequency, and by this square wave display control signal and the party
Ripple public electrode voltages signal is sent to multistable state liquid srystal display floater, so that described multistable state liquid srystal display floater is according to being somebody's turn to do
Square wave display control signal and this square wave public electrode voltages signal are to be in corresponding display state；
The frequency of described square wave display control signal is equal with the frequency of described square wave public electrode voltages signal；Described side
The amplitude of ripple display control signal is more than predetermined amplitude.
During enforcement, described square wave display control signal includes controlling letter corresponding to the first square wave display of frosted display state
Number and corresponding to emptying the second square wave display control signal of display state；
The frequency of described first square wave display control signal is more than the frequency of described second square wave display control signal.
During enforcement, the effective display area of described multistable state liquid srystal display floater is divided into the aobvious of N number of independent display control
Show block；N is the positive integer more than 1；
Described display driver element is specifically for generating the N number of square wave display control corresponding respectively to N number of described display block
Signal processed；
Described display driver element includes N number of square wave display control signal outfan；
It is aobvious with square wave described in the one of described display driver element that each described display block controls end by a display respectively
Showing that control signal outfan connects, this viewing area tuber is according to described square wave public electrode voltages signal with from the display control of this square wave
The square wave display control signal of signal output part processed is to be in corresponding display state.
During enforcement, described square-wave signal signal generating unit includes N number of square wave display control signal generation module and a square wave
Public electrode voltages signal generation module；
Described square wave display control signal generation module is used for controlling generate and export square wave display control signal；
Described square wave public electrode voltages signal generation module is used for controlling to generate and export square wave public electrode voltages letter
Number.
During enforcement, described control unit includes that the first display frequency control signal outfan and the second display frequency control letter
Number outfan；
Described control unit is specifically for exporting the first display frequency control by the first display frequency control signal outfan
Signal processed, exports the second display frequency control signal by the second display frequency control signal outfan；
Described square wave display control signal generation module includes:
First resistance；First controls TFT, and grid is by described first resistance and the first display frequency control signal outfan
Connect, the first pole ground connection；
Second resistance；
Second controls TFT, and grid is connected with the described first the second pole controlling TFT by described second resistance, the first pole
Being connected with d. c. voltage signal outfan, the second pole is connected with square wave display control signal outfan；
3rd resistance；
First controls metal-oxide-semiconductor, and grid is connected by described 3rd resistance and the second display frequency control signal outfan, the
One pole ground connection, the second pole is connected with described square wave display control signal outfan；And,
4th resistance, the first end is connected with the described first grid controlling metal-oxide-semiconductor, the second end ground connection；
Described first control TFT is N-shaped TFT, and described second control TFT is p-type TFT, and described first controls metal-oxide-semiconductor is
NMOS tube；
When described first display frequency control signal outfan output high level, described second display frequency control signal is defeated
When going out end output low level, described square wave display control signal outfan output high level；
When described first display frequency control signal outfan output low level, described second display frequency control signal is defeated
When going out end output high level, described square wave display control signal outfan output low level.
During enforcement, described control unit includes that the first public frequency control signal outfan and the second public frequency control letter
Number outfan；
Described control unit is specifically for exporting the first public frequency control by the first public frequency control signal outfan
Signal processed, exports the second public frequency control signal by the second public frequency control signal outfan；
Described square wave public electrode voltages signal generation module includes:
5th resistance；
3rd controls TFT, and grid is connected by described 5th resistance and the first public frequency control signal outfan, and first
Pole ground connection；
6th resistance；
4th controls TFT, and grid is connected with the described first the second pole controlling TFT by described 6th resistance, the first pole
Being connected with d. c. voltage signal outfan, the second pole is connected with square wave public electrode voltages signal output part；
7th resistance；
Second controls metal-oxide-semiconductor, and grid is controlled by described 3rd resistance and the second public frequency by described 7th resistance
Signal output part connects, and the first pole ground connection, the second pole is connected with described square wave public electrode voltages signal output part；And,
8th resistance, the first end is connected with the described second grid controlling metal-oxide-semiconductor, the second end ground connection；
Described 3rd control TFT is N-shaped TFT, and described 4th control TFT is p-type TFT, and described second controls metal-oxide-semiconductor is
NMOS tube；
When described first public frequency control signal outfan output high level, described second public frequency control signal is defeated
When going out to hold output low level, described square wave public electrode voltages signal output part output high level；
When described first public frequency control signal outfan output low level, described second public frequency control signal is defeated
When going out end output high level, described square wave public electrode voltages signal output part output low level.
During enforcement, drive circuit of the present invention also includes: RCU, wirelessly or non-wirelessly connects with described control unit
Connect；
Described RCU is for sending remote signal to described control unit；
Described control unit is for exporting corresponding frequency control signal under the control of described remote signal.
Present invention also offers a kind of driving method, be applied to above-mentioned drive circuit, described driving method includes:
Control unit is to display driver element output frequency control signal；
Described display driver element generates according to described frequency control signal and exports to be had the square wave of fixed frequency and shows
Control signal and the square wave public electrode voltages signal with fixed frequency, and by public to this square wave display control signal and this square wave
Common electrode voltage signal is sent to multistable state liquid srystal display floater, so that described multistable state liquid srystal display floater is according to this square wave
Display control signal and this square wave public electrode voltages signal are to be in corresponding display state；
The frequency of described square wave display control signal is equal with the frequency of described square wave public electrode voltages signal；Described side
The amplitude of ripple display control signal is more than predetermined amplitude.
Present invention also offers a kind of display device, including multistable state liquid srystal display floater, also include above-mentioned driving electricity
Road.
Compared with prior art, drive circuit of the present invention, driving method and display device, control list by using
Unit is to described display driver element output frequency control signal, and described display driver element, according to the life of described frequency control signal
Become and export the square wave display control signal with fixed frequency and the square wave public electrode voltages signal with fixed frequency, and
This square wave display control signal and this square wave public electrode voltages signal are sent to multistable state liquid srystal display floater, so that institute
State multistable state liquid srystal display floater corresponding to be according to this square wave display control signal and this square wave public electrode voltages signal
Display state, can with simple and quick low cost switching multistable state liquid srystal display floater display state.
Accompanying drawing explanation
Fig. 1 is the structured flowchart of the drive circuit described in the embodiment of the present invention；
Fig. 2 is that the effective display area of described multistable state liquid srystal display floater is divided into showing of eight display blocks from left to right
It is intended to；
Fig. 3 is in the drive circuit described in the embodiment of the present invention, for driving the described side of above-mentioned first display block
The circuit diagram of one specific embodiment of ripple display control signal generation module；
Fig. 4 is in the drive circuit described in the embodiment of the present invention, for driving the described side of above-mentioned first display block
The circuit diagram of one specific embodiment of ripple public electrode voltages control signal generation module；
Fig. 5 is the signal of adoptable input/output module when reality is applied of the drive circuit described in the embodiment of the present invention
Figure；
Fig. 6 is the structural representation of a specific embodiment of drive circuit of the present invention；
Fig. 7 is the operationally flow chart of switching between two kinds of stable states of the drive circuit described in the embodiment of the present invention；
Fig. 8 is the flow chart of the driving method described in the embodiment of the present invention.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Describe, it is clear that described embodiment is only a part of embodiment of the present invention rather than whole embodiments wholely.Based on
Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under not making creative work premise
Embodiment, broadly falls into the scope of protection of the invention.
As it is shown in figure 1, the drive circuit described in the embodiment of the present invention, it is applied to multistable state liquid srystal display floater 10, including
Control unit 11 and display driver element 12, wherein,
Described control unit 11, is connected with described display driver element 12, for exporting to described display driver element 12
Frequency control signal；
Described display driver element 12, is connected with described multistable state liquid srystal display floater 10, for according to described frequency control
Signal processed generates and exports the square wave display control signal with fixed frequency and the square wave public electrode electricity with fixed frequency
Pressure signal, and this square wave display control signal and this square wave public electrode voltages signal are sent to multistable state liquid srystal display floater
10, so that described multistable state liquid srystal display floater is according to this square wave display control signal and this square wave public electrode voltages signal
To be in corresponding display state；
The frequency of described square wave display control signal is equal with the frequency of described square wave public electrode voltages signal；Described side
The amplitude of ripple display control signal is more than predetermined amplitude.
The frequency of described square wave display control signal is equal with the frequency of described square wave public electrode voltages signal；Described side
The amplitude of ripple display control signal is more than predetermined amplitude.
Described predetermined amplitude can be different different and different with liquid crystal cell thickness according to the size of display floater, such as 14 cun
Box thickness be the predetermined amplitude that the display panels of 8um is corresponding be 75V, 14 cun of box thickness are that the display panels of 12um is corresponding
Predetermined amplitude is 45V, 19 cun of box thickness be the predetermined amplitude that the display panels of 8um is corresponding be 110V.
Owing to multistable state liquid srystal needs tens volts of voltages to drive, the amplitude of the most described square wave display control signal needs big
In predetermined amplitude, described predetermined amplitude can be such as 45V, 75V, 110V etc..
The drive circuit being applied to multistable state liquid srystal display floater described in the embodiment of the present invention is by using control unit
11, to described display driver element 12 output frequency control signal, described display driver element 12, believe according to described FREQUENCY CONTROL
Number generate and export have fixed frequency square wave display control signal and have fixed frequency square wave public electrode voltages letter
Number, and this square wave display control signal and this square wave public electrode voltages signal are sent to multistable state liquid srystal display floater, with
Make described multistable state liquid srystal display floater according to this square wave display control signal and this square wave public electrode voltages signal with place
State is shown in accordingly, can be with the display state of the switching multistable state liquid srystal display floater of simple and quick low cost.
When practical operation, described display driver element 12 can include boost current and DC/AC (ac/dc) mould
Block, multistable state liquid srystal needs tens volts of voltages to drive, and needing to be realized by the boosting of low pressure moment, needing DC/AC module to incite somebody to action in addition
Input direct voltage is converted to the square-wave signal of fixed frequency, thus realizes docking with the signal of multistable state liquid srystal display floater.
Described control unit 11 can be arranged in single-chip microcomputer, and described control unit 11 can be real by control display driver element 12
The now mutual switching of height frequency, wherein single-chip microcomputer low cost, and higher to the compatibility of program.
The multistable state liquid srystal display floater that driving method described in the embodiment of the present invention is applied to have employed a kind of smectic type
Liquid crystal, smectic crystal has intrastratal flow, interlayer immobilising sequential 2 D characteristic, and presents under different voltages drive
Different steady statues, therefore can be used for multistable state liquid srystal and show.This multistable fabrication techniques technique is relatively simple, has into
This advantage.
Concrete, described square wave display control signal can include the first square wave display control corresponding to frosted display state
Signal processed and corresponding to emptying the second square wave display control signal of display state；
The frequency of described first square wave display control signal is more than the frequency of described second square wave display control signal.
Described first square wave display control signal shows state corresponding to frosted, and the second square wave display control signal corresponds to
Empty display state, the peep-proof pattern of these the two kinds the most corresponding scattering states of display state and the non-peep-proof pattern of transmission state.At tool
When body is implemented, the frequency of described first square wave display control signal can be 1KHz (KHz), described second square wave display control
The frequency of signal processed can be 50Hz (hertz).When practical operation, according to different practical situations, the display control of this first square wave
The frequency of signal processed and/or the frequency of described second square wave display control signal also can be arranged to other values, take it at this
Value is also not construed as limiting.
Concrete, the effective display area of described multistable state liquid srystal display floater is divided into the aobvious of N number of independent display control
Show block；N is the positive integer more than 1；
Described display driver element is specifically for generating the N number of square wave display control corresponding respectively to N number of described display block
Signal processed；
Described display driver element includes N number of square wave display control signal outfan；
It is aobvious with square wave described in the one of described display driver element that each described display block controls end by a display respectively
Showing that control signal outfan connects, this viewing area tuber is according to described square wave public electrode voltages signal with from the display control of this square wave
The square wave display control signal of signal output part processed is to be in corresponding display state.
When practical operation, can be by multiple viewing areas respectively, the effective display area of described multistable state liquid srystal display floater
Block, then carries out display state control respectively to each display block.
As in figure 2 it is shown, the effective display area of described multistable state liquid srystal display floater is divided into eight viewing areas from left to right
Block, each display block is connected with a square wave display control signal outfan respectively；
The first display block and the first square wave display control signal outfan SEG1 from left to right connect；
The second display block and the second square wave display control signal outfan SEG2 from left to right connect；
The 3rd display block from left to right is connected with third party ripple display control signal outfan SEG3；
The 4th display block and the 4th square wave display control signal outfan SEG4 from left to right connect；
The 5th display block and the 5th square wave display control signal outfan SEG5 from left to right connect；
The 6th display block and the 6th square wave display control signal outfan SEG6 from left to right connect；
The 7th display block and the 7th square wave display control signal outfan SEG7 from left to right connect；
The 8th display block from left to right is connected with eighth ripple display control signal outfan SEG8；
Described multistable state liquid srystal display floater is also connected with square wave public electrode voltages signal output part COM.
When practical operation, the division of display block can also have other mode, divides the most from top to bottom, or
Other any possible dividing mode, are not construed as limiting the concrete dividing mode of display block.
When the output of drive circuit has in limited time, multiple display block can only be divided into control respectively, forbid that whole screen operates,
But when the output height of drive circuit, it is also possible to whole screen operates.
When described multistable state liquid srystal display floater includes multiple display block, described display driver element is in described control
Output corresponding square wave display is driven to control letter to multiple displays respectively under the control of many class frequencys control signal that signal generates
Number, it is respectively at corresponding display state controlling the plurality of display block.
Concrete, when the effective display area of described multistable state liquid srystal display floater is divided into what N number of independent display controlled
During display block, described square-wave signal signal generating unit includes that N number of square wave display control signal generation module and a square wave are public
Electrode voltage signal generation module；
Described square wave display control signal generation module is used for controlling generate and export square wave display control signal；
Described square wave public electrode voltages signal generation module is used for controlling to generate and export square wave public electrode voltages letter
Number.
When practical operation, described display driver element can be according to the frequency from single-chip microcomputer (i.e. frequency control unit)
Control signal passes through chopper amplification circuit, and output drives the amplitude square-wave signal required for liquid crystal, can be according to display state
Requirement output two kinds of frequencies square-wave signal, thus realize dock with the signal of multistable state liquid srystal display floater, FREQUENCY CONTROL
And the interruption algorithm recorded below is realized by inside programming.
Concrete, described control unit includes that the first display frequency control signal outfan and the second display frequency control letter
Number outfan；
Described control unit is specifically for exporting the first display frequency control by the first display frequency control signal outfan
Signal processed, exports the second display frequency control signal by the second display frequency control signal outfan；
Described square wave display control signal generation module includes:
First resistance；First controls TFT, and grid is by described first resistance and the first display frequency control signal outfan
Connect, the first pole ground connection；
Second resistance；
Second controls TFT, and grid is connected with the described first the second pole controlling TFT by described second resistance, the first pole
Being connected with d. c. voltage signal outfan, the second pole is connected with square wave display control signal outfan；
3rd resistance；
First controls metal-oxide-semiconductor, and grid is connected by described 3rd resistance and the second display frequency control signal outfan, the
One pole ground connection, the second pole is connected with described square wave display control signal outfan；And,
4th resistance, the first end is connected with the described first grid controlling metal-oxide-semiconductor, the second end ground connection；
Described first control TFT is N-shaped TFT (Thin Film Transistor, thin film transistor (TFT)), and described second controls
TFT is p-type TFT, and described first control metal-oxide-semiconductor is NMOS (N-Metal-Oxide-Semiconductor, N-type metal-oxide
Thing-quasiconductor) transistor；
When described first display frequency control signal outfan output high level, described second display frequency control signal is defeated
When going out end output low level, described square wave display control signal outfan output high level；
When described first display frequency control signal outfan output low level, described second display frequency control signal is defeated
When going out end output high level, described square wave display control signal outfan output low level.
Such as, as it is shown on figure 3, in the drive circuit described in the embodiment of the present invention, be used for driving above-mentioned first viewing area
One specific embodiment of the described square wave display control signal generation module of block may include that
First resistance R1；
Being numbered the first control TFT of T1, grid is defeated by described first resistance R1 and the first display frequency control signal
Going out and hold SEG1-H to connect, source electrode is connected with ground end RF_GND；
Second resistance R2；
Being numbered the second control TFT of T2, grid controls TFT's by the second resistance R2 be numbered T1 described first
Second pole connects, and source electrode is connected with the d. c. voltage signal outfan of output d. c. voltage signal HV5, and drain electrode shows with the first square wave
Show that control signal outfan SEG1 connects；
3rd resistance R3；
First controls metal-oxide-semiconductor M1, and grid is by described 3rd resistance R3 and the second display frequency control signal outfan
SEG1-L connects, and source electrode is connected with ground end RF_GND, and drain electrode is connected with described first square wave display control signal outfan SEG1；
And,
4th resistance R4, the first end is connected with the described first grid controlling metal-oxide-semiconductor M1, and the second end is with ground end RF_GND even
Connect；
T1 is N-shaped TFT, and T2 is p-type TFT, and M1 is NMOS tube；
When described first display frequency control signal outfan SEG1-H exports high level, and described second display frequency controls
During signal output part SEG1-L end output low level, described first square wave display control signal outfan SEG1 exports high level；
When described first display frequency control signal outfan SEG1-H output low level, described second display frequency controls
When signal output part SEG1-L exports high level, described first square wave display control signal outfan SEG1 output low level.
In the embodiment shown in fig. 3, the resistance value of R1 and the resistance value of R3 can be 1K Europe, and the resistance value of R2 can be
40K Europe, the resistance value of R4 can be 100K Europe.
When square wave display control signal generation module as shown in Figure 3 works, by Single-chip Controlling SEG1-H, SEG1-L
Output high level or low level, when SEG1-H exports high level, SEG1-L output low level, the first display block is driven,
Square wave display control signal generation module shown in Fig. 3 has the effect of copped wave and amplification, and wherein, T2 has amplification.Fig. 3
D. c. voltage signal can be converted into the square-wave signal with fixed frequency by shown square wave display control signal generation module,
And can be by the output frequency of two display frequency control signal outfans of Single-chip Controlling, such that it is able to control SEG1 output
The frequency of square wave display control signal.
Concrete, described control unit includes that the first public frequency control signal outfan and the second public frequency control letter
Number outfan；
Described control unit is specifically for exporting the first public frequency control by the first public frequency control signal outfan
Signal processed, exports the second public frequency control signal by the second public frequency control signal outfan；
Described square wave public electrode voltages signal generation module includes:
5th resistance；
3rd controls TFT, and grid is connected by described 5th resistance and the first public frequency control signal outfan, and first
Pole ground connection；
6th resistance；
4th controls TFT, and grid is connected with the described first the second pole controlling TFT by described 6th resistance, the first pole
Being connected with d. c. voltage signal outfan, the second pole is connected with square wave public electrode voltages signal output part；
7th resistance；
Second controls metal-oxide-semiconductor, and grid is controlled by described 3rd resistance and the second public frequency by described 7th resistance
Signal output part connects, and the first pole ground connection, the second pole is connected with described square wave public electrode voltages signal output part；And,
8th resistance, the first end is connected with the described second grid controlling metal-oxide-semiconductor, the second end ground connection；
Described 3rd control TFT is N-shaped TFT, and described 4th control TFT is p-type TFT, and described second controls metal-oxide-semiconductor is
Nmos pass transistor；
When described first public frequency control signal outfan output high level, described second public frequency control signal is defeated
When going out to hold output low level, described square wave public electrode voltages signal output part output high level；
When described first public frequency control signal outfan output low level, described second public frequency control signal is defeated
When going out end output high level, described square wave public electrode voltages signal output part output low level.
Such as, as shown in Figure 4, in the drive circuit described in the embodiment of the present invention, described square wave public electrode voltages control
One specific embodiment of signal generation module processed may include that
5th resistance R5；
Being numbered the 3rd control TFT of T3, grid passes through the 5th resistance R5 and the first public frequency control signal outfan
COM-H connects, and source electrode is connected with ground end RF_GND；
6th resistance R6；
Being numbered the 4th control TFT of T4, grid controls TFT's by the 6th resistance R6 be numbered T1 described first
Second pole connects, and source electrode is connected with the d. c. voltage signal outfan of output d. c. voltage signal HV5, drain electrode and square wave common electrical
Pole tension signal output part COM connects；
7th resistance R7；
Second controls metal-oxide-semiconductor M2, and grid is by described 7th resistance R7 and the second public frequency control signal outfan
COM-L connects, and source electrode is connected with ground end RF_GND, and drain electrode is connected with described square wave public electrode voltages signal output part COM；With
And,
8th resistance R8, the first end is connected with the described second grid controlling metal-oxide-semiconductor M2, the second end and ground end RF_GND；
T3 is N-shaped TFT, and T4 is p-type TFT, and M2 is NMOS tube；
When described first public frequency control signal outfan COM-H exports high level, and described second public frequency controls
During signal output part COM-L output low level, described square wave public electrode voltages signal output part COM exports high level；
When described first public frequency control signal outfan COM-H output low level, described second public frequency controls
When signal output part COM-L exports high level, described square wave public electrode voltages signal output part COM output low level.
When practical operation, the resistance value of R5 and the resistance value of R7 can be 1K Europe, and the resistance value of R6 can be 20K Europe,
The resistance value of R8 can be 100K Europe.
When square wave public electrode voltages control signal generation module as shown in Figure 4 works, by Single-chip Controlling COM-
H, COM-L output high level or low level, when COM-H exports high level, COM-L output low level, COM can export stable
Reference voltage, the square wave public electrode voltages control signal generation module shown in Fig. 4 has the effect of copped wave and voltage stabilizing.Fig. 4
Shown square wave public electrode voltages control signal generation module to be converted into the side with fixed frequency by d. c. voltage signal
Ripple signal, and can be by the output frequency of two public frequency control signal outfans of Single-chip Controlling, such that it is able to control COM
The frequency of the square wave display control signal of output.
Such as, as it is shown in figure 5, drive circuit adoptable input and output when reality is applied described in the embodiment of the present invention
Module can include 12V DC voltage input end, hold GND, the first square wave display control signal outfan SEG1, the second square wave
Display control signal outfan SEG2 connection, third party ripple display control signal outfan SEG3, the 4th square wave display control letter
Number outfan SEG4, the 5th square wave display control signal outfan SEG5 connect, the 6th square wave display control signal outfan
SEG6, the 7th square wave display control signal outfan SEG7, eighth ripple display control signal outfan SEG8, square wave common electrical
Pole tension signal output part COM, wave point, wireline interface and debugging interface.
Drive circuit described in the embodiment of the present invention can also include:
RCU, is wirelessly or non-wirelessly connected with described control unit；
Described RCU is for sending remote signal to described control unit；
Described control unit is for exporting corresponding frequency control signal under the control of described remote signal.
Described RCU can be such as infrared remote control unit, and described infrared remote control unit can be with two kinds of frequencies of controlled in wireless
The mutual switching of rate, thus reach the switching of peep-proof and non-two kinds of stable states of peep-proof.
Described infrared remote control unit can send four kinds of operations: full frame order empties, full frame order frosted, 1/2nd screens
Empty, 1/2nd screen frosteds；When practical operation, supporting full frame 8 display block simultaneously frosteds and empty, now electric current is
Greatly.
Fig. 6 is the structural representation of a specific embodiment of drive circuit of the present invention.As shown in Figure 6, the present invention
Drive circuit described in embodiment includes infrared remote control unit, single-chip microcomputer (namely control unit) and display driver element, monolithic
Machine is by PC control, and described display driver element is connected with multistable state liquid srystal display floater, to control described multistable state liquid srystal
The peep-proof of display floater freely switches with non-two kinds of stable states of peep-proof, is conveniently used for selecting different states according to surrounding enviroment.
Display driver element includes booster circuit and DC/AC module, and multistable state liquid srystal needs tens volts of voltages to drive, and need to pass through low pressure
Moment boosting realizes, and needs DC/AC module that input direct voltage is converted to the square-wave signal of fixed frequency in addition, thus realizes
Dock with the signal of multistable state liquid srystal display floater；For mainly single-chip microcomputer (namely control unit) and the infrared remote control that control
Unit, it is possible to achieve the just mutual switching of frequency, wherein single-chip microcomputer low cost, and higher to the compatibility of program, infrared distant
Control easy to operate simply.
The embodiment of the present invention can apply the peep-proof at display screen by the scattering states of smectic type multistable state liquid srystal with through state
In effect, there are higher business and Military value, and the present invention can be for different display screen size change hardware driving sides
Case, compatibility is higher, and the control program that the present invention uses carries single-chip microcomputer platform, and reliability is higher, stable performance, and this
Bright human-computer interaction device uses infrared remote control to realize, and reliability is high, simple to operate, stable performance.
Fig. 7 is the operationally flow chart of switching between two kinds of stable states of the drive circuit described in the embodiment of the present invention.As
Shown in Fig. 7, first, single-chip microcomputer (namely control unit) controls the first display frequency control signal outfan SEG-H, the second display
Frequency control signal outfan SEG-L, the first public frequency control signal outfan COM-H, the second public frequency control signal
Outfan COM-L, so that display driver element output 50Hz square wave display control signal and 50Hz square wave public electrode voltages
Control signal, so that the display block display empty of correspondence；
When infrared remote control unit sends the signal interrupting and switching to frosted state, switch to frosted state, single-chip microcomputer
(namely control unit) controls the first display frequency control signal outfan SEG-H, the second display frequency control signal outfan
SEG-L, the first public frequency control signal outfan COM-H, the second public frequency control signal outfan COM-L, so that
Display driver element output 1KHz square wave display control signal and 1KHz square wave public electrode voltages control signal, so that corresponding
Display block display frosted state；
When infrared remote-controlled signal sends the signal interrupting and switching to empty, single-chip microcomputer (namely control unit) is controlled
Make the first display frequency control signal outfan SEG-H, the second display frequency control signal outfan SEG-L, the first common frequency
Rate control signal outfan COM-H, the second public frequency control signal outfan COM-L, so that display driver element output
50Hz square wave display control signal and 50Hz square wave public electrode voltages control signal, so that the display block of correspondence shows clearly
Dummy status.
As shown in Figure 8, the driving method described in the embodiment of the present invention, it is applied to above-mentioned drive circuit, described driving side
Method includes:
S1: square-wave signal signal generating unit generates and exports to be had the square wave display control signal of fixed frequency and has fixing
The square wave public electrode voltages signal of frequency；
S2: described square wave display control signal is converted to exchange accordingly display control signal by display driver element, will
Described square wave public electrode voltages signal is converted to exchange public electrode voltages signal accordingly, and this exchange display is controlled letter
Number exchanging public electrode voltages signal with this is sent to multistable state liquid srystal display floater, so that described multistable state liquid srystal display surface
Buttress exchanges public electrode voltages signal to be in corresponding display state according to this exchange display control signal with this；
The frequency of described square wave display control signal is equal with the frequency of described square wave public electrode voltages signal；Described friendship
The amplitude of stream display control signal is more than predetermined amplitude.
Display device described in the embodiment of the present invention, including multistable state liquid srystal display floater, also includes above-mentioned driving electricity
Road.
The above is the preferred embodiment of the present invention, it is noted that for those skilled in the art
For, on the premise of without departing from principle of the present invention, it is also possible to make some improvements and modifications, these improvements and modifications are also
Should be regarded as protection scope of the present invention.
Claims (9)
1. a drive circuit, is applied to multistable state liquid srystal display floater, it is characterised in that include that control unit and display drive
Unit, wherein,
Described control unit, is connected with described display driver element, for controlling letter to described display driver element output frequency
Number；
Described display driver element, has the square wave of fixed frequency show for generating according to described frequency control signal and export
Control signal and the square wave public electrode voltages signal with fixed frequency, and by public to this square wave display control signal and this square wave
Common electrode voltage signal is sent to multistable state liquid srystal display floater, so that described multistable state liquid srystal display floater is according to this square wave
Display control signal and this square wave public electrode voltages signal are to be in corresponding display state；
The frequency of described square wave display control signal is equal with the frequency of described square wave public electrode voltages signal；Described square wave shows
Show that the amplitude of control signal is more than predetermined amplitude.
2. drive circuit as claimed in claim 1, it is characterised in that described square wave display control signal includes corresponding to frosted
First square wave display control signal of display state and corresponding to emptying the second square wave display control signal of display state；
The frequency of described first square wave display control signal is more than the frequency of described second square wave display control signal.
3. drive circuit as claimed in claim 1 or 2, it is characterised in that effectively showing of described multistable state liquid srystal display floater
Show that district is divided into the display block that N number of independent display controls；N is the positive integer more than 1；
Described display driver element controls letter specifically for generating the N number of square wave display corresponding respectively to N number of described display block
Number；
Described display driver element includes N number of square wave display control signal outfan；
Each described display block controlled by a display respectively end and described display driver element one described in square wave display control
Signal output part processed connects, and this viewing area tuber controls letter according to described square wave public electrode voltages signal with from the display of this square wave
The square wave display control signal of number outfan is to be in corresponding display state.
4. drive circuit as claimed in claim 3, it is characterised in that described square-wave signal signal generating unit includes that N number of square wave shows
Show control signal generation module and a square wave public electrode voltages signal generation module；
Described square wave display control signal generation module is used for controlling generate and export square wave display control signal；
Described square wave public electrode voltages signal generation module is used for controlling generate and export square wave public electrode voltages signal.
5. drive circuit as claimed in claim 4, it is characterised in that described control unit includes that the first display frequency controls letter
Number outfan and the second display frequency control signal outfan；
Described control unit controls letter specifically for exporting the first display frequency by the first display frequency control signal outfan
Number, export the second display frequency control signal by the second display frequency control signal outfan；
Described square wave display control signal generation module includes:
First resistance；First controls TFT, and grid is connected by described first resistance and the first display frequency control signal outfan
Connect, the first pole ground connection；
Second resistance；
Second controls TFT, and grid is connected with the described first the second pole controlling TFT by described second resistance, and the first pole is with straight
Stream voltage signal output end connects, and the second pole is connected with square wave display control signal outfan；
3rd resistance；
First controls metal-oxide-semiconductor, and grid is connected by described 3rd resistance and the second display frequency control signal outfan, the first pole
Ground connection, the second pole is connected with described square wave display control signal outfan；And,
4th resistance, the first end is connected with the described first grid controlling metal-oxide-semiconductor, the second end ground connection；
Described first control TFT is N-shaped TFT, and described second control TFT is p-type TFT, and described first control metal-oxide-semiconductor is that NMOS is brilliant
Body pipe；
When described first display frequency control signal outfan output high level, described second display frequency control signal outfan
During end output low level, described square wave display control signal outfan output high level；
When described first display frequency control signal outfan output low level, described second display frequency control signal outfan
During output high level, described square wave display control signal outfan output low level.
6. drive circuit as claimed in claim 4, it is characterised in that described control unit includes that the first public frequency controls letter
Number outfan and the second public frequency control signal outfan；
Described control unit controls letter specifically for exporting the first public frequency by the first public frequency control signal outfan
Number, export the second public frequency control signal by the second public frequency control signal outfan；
Described square wave public electrode voltages signal generation module includes:
5th resistance；
3rd controls TFT, and grid is connected by described 5th resistance and the first public frequency control signal outfan, and the first pole connects
Ground；
6th resistance；
4th controls TFT, and grid is connected with the described first the second pole controlling TFT by described 6th resistance, and the first pole is with straight
Stream voltage signal output end connects, and the second pole is connected with square wave public electrode voltages signal output part；
7th resistance；
Second control metal-oxide-semiconductor, grid by described 7th resistance by described 3rd resistance and the second public frequency control signal
Outfan connects, and the first pole ground connection, the second pole is connected with described square wave public electrode voltages signal output part；And,
8th resistance, the first end is connected with the described second grid controlling metal-oxide-semiconductor, the second end ground connection；
Described 3rd control TFT is N-shaped TFT, and described 4th control TFT is p-type TFT, and described second control metal-oxide-semiconductor is that NMOS is brilliant
Body pipe；
When described first public frequency control signal outfan output high level, described second public frequency control signal outfan
During output low level, described square wave public electrode voltages signal output part output high level；
When described first public frequency control signal outfan output low level, described second public frequency control signal outfan
During output high level, described square wave public electrode voltages signal output part output low level.
7. drive circuit as claimed in claim 3, it is characterised in that also include: RCU, wireless with described control unit
Or wired connection；
Described RCU is for sending remote signal to described control unit；
Described control unit is for exporting corresponding frequency control signal under the control of described remote signal.
8. a driving method, is applied to the drive circuit as described in any claim in claim 1 to 7, and its feature exists
In, described driving method includes:
Control unit is to display driver element output frequency control signal；
Described display driver element generates according to described frequency control signal and exports the square wave display control with fixed frequency
Signal and the square wave public electrode voltages signal with fixed frequency, and by this square wave display control signal and this square wave common electrical
Pole tension signal is sent to multistable state liquid srystal display floater, so that described multistable state liquid srystal display floater shows according to this square wave
Control signal and this square wave public electrode voltages signal are to be in corresponding display state；
The frequency of described square wave display control signal is equal with the frequency of described square wave public electrode voltages signal；Described square wave shows
Show that the amplitude of control signal is more than predetermined amplitude.
9. a display device, including multistable state liquid srystal display floater, it is characterised in that also include as appointed in claim 1 to 7
Drive circuit described in one claim.
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| CN201610815016.7A CN106205541B (en) | 2016-09-09 | 2016-09-09 | Driving circuit, driving method and display device |
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|---|---|---|---|
| CN201610815016.7A CN106205541B (en) | 2016-09-09 | 2016-09-09 | Driving circuit, driving method and display device |
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| US20050001797A1 (en) * | 2003-07-02 | 2005-01-06 | Miller Nick M. | Multi-configuration display driver |
| CN101710214A (en) * | 2009-12-23 | 2010-05-19 | 华映光电股份有限公司 | Multi-steady state liquid crystal display and driving way thereof |
| CN102930841A (en) * | 2012-10-22 | 2013-02-13 | 沃谱瑞科技(北京)有限责任公司 | Pixel circuit of smectic state liquid crystal multistable electronic paper display |
| CN205334407U (en) * | 2015-12-03 | 2016-06-22 | 深圳磨石科技有限公司 | Touch display apparatus and electronic equipment |
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2016
- 2016-09-09 CN CN201610815016.7A patent/CN106205541B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050001797A1 (en) * | 2003-07-02 | 2005-01-06 | Miller Nick M. | Multi-configuration display driver |
| CN101710214A (en) * | 2009-12-23 | 2010-05-19 | 华映光电股份有限公司 | Multi-steady state liquid crystal display and driving way thereof |
| CN102930841A (en) * | 2012-10-22 | 2013-02-13 | 沃谱瑞科技(北京)有限责任公司 | Pixel circuit of smectic state liquid crystal multistable electronic paper display |
| CN205334407U (en) * | 2015-12-03 | 2016-06-22 | 深圳磨石科技有限公司 | Touch display apparatus and electronic equipment |
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| CN106205541B (en) | 2018-10-09 |
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