CN107863076A - A kind of section type liquid crystal display drive circuit and driving method - Google Patents
A kind of section type liquid crystal display drive circuit and driving method Download PDFInfo
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- CN107863076A CN107863076A CN201711131824.2A CN201711131824A CN107863076A CN 107863076 A CN107863076 A CN 107863076A CN 201711131824 A CN201711131824 A CN 201711131824A CN 107863076 A CN107863076 A CN 107863076A
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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
Abstract
The invention discloses a kind of section type liquid crystal display drive circuit and driving method, including：Segment electrode driver element, segment electrode scan line, segment electrode, common electrode drive unit, public electrode scan line and public electrode, each drive cycle of described section type liquid crystal display drive circuit also includes including first period and second period, the drive circuit：First switch, second switch, switch control unit and the first touch-control driver element, the second touch-control driver element, a section type liquid crystal display can be made on the basis of with display function, realize touch controllable function, and be mutual capacitance mode, it is strong compared to the touch sensible of self-capacitance, its stability against atmospheric influence.
Description
Technical field
The present invention relates to technical field of liquid crystal display, relate more specifically to an a kind of section type liquid crystal display drive circuit and
Driving method.
Background technology
Liquid crystal display compares traditional display, has the advantages that light, thin, low-power consumption, Low emissivity, is widely used in
In all trades and professions and social life.Liquid crystal display can be divided into a segmentation and dot matrix, wherein pen section by the difference of display pixel
Formula liquid crystal display is portable media player (PMP), computer, POS terminals, industrial control instrument equipment and other domestic electronics
Through commonly used device in equipment.
Section type liquid crystal display is generally used for numerical monitor or fixed word（Figure）Display.Existing segment liquid crystal
Display sensing module generally comprises：It is segment electrode driver element, segment electrode scan line, segment electrode, common electrode drive unit, public
Electrode scan line, public electrode, touch-control driver element and switch control unit are to realize that the figure of a section type liquid crystal display shows
Show and touch controllable function.If the earth can be directly contacted using the equipment of this section type liquid crystal display, then parasitic capacitance
The potential of one end be exactly GND, be exactly the datum mark of a potential, finger just can accurately detect capacitance change when touching.
But an existing section type liquid crystal display with touch controllable function is using self-capacitance pattern, because of the screen body capacitance of self-capacitance
One end is to meet GND, only needs a path electrode at work：Segment electrode or public electrode, so the parasitism electricity of self-capacitance pattern
One end of appearance can be changed by GND to be influenceed, and stability against atmospheric influence is poor, particularly in hand-held class, using in the equipment such as battery powered.
Whole set equipment is not connected on socket directly with power line, and ground connection property is poor, so as to influence whether the self-capacitance in equipment
The use function of touch-screen.
The content of the invention
In order to solve the deficiencies in the prior art, the invention provides a kind of strong segment liquid crystal of stability against atmospheric influence to show
Show device drive circuit and driving method.
The technique effect of the invention to be reached is realized by following scheme：A kind of section type liquid crystal display driving electricity
Road, including：Segment electrode driver element, segment electrode scan line, segment electrode, common electrode drive unit, public electrode scan line and
Public electrode, each drive cycle of described section type liquid crystal display drive circuit include first period and one the
Two periods, the drive circuit also include：First switch, second switch, switch control unit and the first touch-control driver element, second
Touch-control driver element；
Wherein, the first switch includes the first contact a, the second contact b and the 3rd contact c, the first contact a with it is described
Segment electrode scan line is connected, and the second contact b is connected with the segment electrode driver element, the 3rd contact c and described the
One touch-control driver element is connected, and the first switch is used to turn on first contact under the control of the switch control unit
A and the second contact b or conducting the first contact a and the 3rd contact c；
The second switch includes the 4th contact A, the 5th contact B and the 6th contact C, the 4th contact A and the common electrical
Pole scan line is connected, and the 5th contact B is connected with the common electrode drive unit, the 6th contact C and described second
Touch-control driver element is connected.The second switch is used to turn on the 4th contact A under the control of the switch control unit
With the 5th contact B or conducting the 4th contact A and the 6th contact C；
Described switch control unit one end is connected with the first switch, and the other end is connected with the second switch, in institute
State in the first period, control the first contact a of the first switch to be turned on the second contact b, so that the segment electrode scan line
It is connected with the segment electrode driver element, and the 4th contact A of the control second switch turns on the 5th contact B, so that institute
Public electrode scan line is stated with the common electrode drive unit to be connected；Within second period, the first switch is controlled
The first contact a turned on the 3rd contact c so that the segment electrode scan line and the first touch-control driver element phase
Even, turned on the 4th contact A of the control second switch with the 6th contact C so that the public electrode scan line with it is described
Second touch control unit is connected；
The first touch-control driver element was used within second period, and scanning signal is sent to the segment electrode scan line,
The second touch-control driver element was used within second period, and scanning signal is sent to the public electrode scan line, with
Realize the detection to the capacitance between the public electrode and segment electrode.
Preferably, the switch control unit is sequential control circuit.
Preferably, the sequencing interchangeable of the first period in a drive cycle and the second period.
Preferably, the first touch-control driver element and the second touch-control driver element are respectively analog to digital conversion circuit.
Preferably, the first switch and second switch are respectively insulated-gate type field effect transistor.
A kind of driving method applied to a section type liquid crystal display drive circuit described above, it is characterised in that institute
Stating driving method includes：
Within the first period, the first contact for controlling first switch using switch control unit turns on the second contact, so that section
Electrode scan line is connected with segment electrode driver element, and the 4th contact of control second switch turns on the 5th contact, so that public
Common electrode scan line is connected with common electrode drive unit；
Scanning signal is sent to the segment electrode scan line using the segment electrode driver element, while utilizes common electrode drive
Unit sends scanning signal to public electrode scan line, to realize the display of image；
Within the second period, the first contact for controlling the first switch using the switch control unit is led with the 3rd contact
It is logical so that the segment electrode scan line is connected with the first touch-control driver element, and the 4th contact of the control second switch and
6th contact turns on, so that the public electrode scan line is connected with the second touch-control driver element；
Scanning signal is sent to the segment electrode scan line using the first touch-control driver element, while utilizes described second
Touch-control driver element sends scanning signal to the public electrode scan line, to realize between the segment electrode and public electrode
Capacitance detection.
Preferably, the sequencing interchangeable of first period and the second period.
Preferably, the public electrode scan line of a section type liquid crystal display is a plurality of, first period include with it is described
Public electrode number of scanning lines the first sub-period of identical, and each first sub-period is equal；
It is described to send scanning signal to the segment electrode scan line using the segment electrode driver element, while utilize public electrode
Driver element sends scanning signal to public electrode scan line, to realize being shown as image：Driven using the segment electrode single
Member sends scanning signal to the segment electrode scan line, while using the common electrode drive unit sequentially to public affairs every described
Common electrode scan line sends the scanning signal of first sub-period, to realize the display of image.
Preferably, second period and first sub-period are equal or unequal.
Preferably, second period includes multiple the second equal sub-periods, second sub-period and described first
Sub-period is equal or unequal.
The present invention has advantages below：
1st, by adding first switch, second switch, switch control unit and on the basis of prior art drive circuit
One touch-control driver element, the second touch-control driver element, make a section type liquid crystal display on the basis of with display function, realize
Touch controllable function, and be mutual capacitance type touch control function, it is strong compared to the touch sensible of self-capacitance, its stability against atmospheric influence；
2nd, designed by using the sequential circuit of the first period and the second period, and the first period in a drive cycle and the
The sequencing interchangeable of two periods, it can be set according to the actual conditions of the equipment of an application section type liquid crystal display to carry out circuit
Meter, and then realize that touch-control and the order of display are exchanged.
Brief description of the drawings
The drive circuit figure for the section type liquid crystal display that Fig. 1 is provided by the embodiment of the present invention；
The driving method flow chart for the section type liquid crystal display that Fig. 2 is provided by the embodiment of the present invention one；
The driving method flow chart for the section type liquid crystal display that Fig. 3 is provided by the embodiment of the present invention two；
The driving method timing diagram for the section type liquid crystal display that Fig. 4 is provided by the embodiment of the present invention one；
The driving method timing diagram for the section type liquid crystal display that Fig. 5 is provided by the embodiment of the present invention two.
Embodiment
The present invention will be described in detail with reference to the accompanying drawings and examples, and the example of the embodiment is shown in the accompanying drawings
Go out, wherein same or similar label represents same or similar element or the member with same or like function from beginning to end
Part.The embodiments described below with reference to the accompanying drawings are exemplary, it is intended to for explaining the present invention, and it is not intended that to this
The limitation of invention.
In the description of the invention, it is to be understood that term " length ", " width ", " on ", " under ", "front", "rear",
The orientation or position relationship of the instruction such as "left", "right", " vertical ", " level ", " top ", " bottom ", " interior ", " outer " is based on accompanying drawing institutes
The orientation or position relationship shown, it is for only for ease of the description present invention and simplifies description, rather than instruction or the dress for implying meaning
Put or element there must be specific orientation, with specific azimuth configuration and operation, therefore it is not intended that to limit of the invention
System.
In addition, term " first ", " second ", " the 3rd " are only used for describing purpose, and it is not intended that instruction or implying phase
To importance or the implicit quantity for indicating indicated technical characteristic.Thus, " first ", " second ", " the 3rd " are defined
One or more this feature can be expressed or be implicitly included to feature.In the description of the invention, " multiple " are meant that
Two or more, unless otherwise specifically defined.
In the present invention, unless otherwise clearly defined and limited, term " installation ", " connected ", " connection ", " fixation ",
Terms such as " settings " should be interpreted broadly, for example, it may be fixedly connected or be detachably connected, or integrally；Can be with
It is mechanical connection or electrical connection；Can be joined directly together, can also be indirectly connected, can also be by intermediary
The connection of two element internals or the interaction relationship of two elements.For the ordinary skill in the art, can be with
The concrete meaning of above-mentioned term in the present invention is understood as the case may be.
As shown in figure 1, the embodiment of the present invention provides an a kind of section type liquid crystal display drive circuit, described segment liquid crystal
Each drive cycle of circuit of display driving, which includes a first period t1 and a second period t2, the circuit, to be included：
Segment electrode driver element 1, segment electrode scan line 2, segment electrode 3, common electrode drive unit 4, public electrode scan line 5 and public
Electrode 6, in addition to said structure, the drive circuit also includes：First switch S1, second switch S2, switch control unit 7 and
One touch-control driver element 8, the second touch-control driver element 9；
Wherein, the first switch S1 includes the first contact a, the second contact b and the 3rd contact c, the first contact a and institute
State segment electrode scan line 2 to be connected, the second contact b is connected with the segment electrode driver element 1, the 3rd contact c and institute
State the first touch-control driver element 8 to be connected, the first switch S1 is used under the control of the switch control unit 7 described in conducting
First contact a and the second contact b or conducting the first contact a and the 3rd contact c；
The second switch S2 includes the 4th contact A, the 5th contact B and the 6th contact C, the 4th contact A with it is described public
Electrode scan line 5 be connected, the 5th contact B is connected with the common electrode drive unit 4, the 6th contact C with it is described
Second touch-control driver element 9 is connected.The second switch S2 is used to turn on described the under the control of the switch control unit 7
Four contact As and the 5th contact B or conducting the 4th contact A and the 6th contact C；
Described one end of switch control unit 7 is connected with the first switch S1, and the other end is connected with the second switch S2, is used for
Within first period t1, the first contact a of the first switch S1 is controlled to be turned on the second contact b, so that described section of electricity
Pole scan line 2 is connected with the segment electrode driver element 1, and the control second switch S2 the 4th contact A and the 5th contact B
Conducting, so that the public electrode scan line 5 is connected with the common electrode drive unit 4；Within second period t2, control
The the first contact a for making the first switch S1 turns on the 3rd contact c, so that the segment electrode scan line 2 and described the
One touch-control driver element 8 is connected, and the control second switch S2 the 4th contact A turns on the 6th contact C, so that the public affairs
Common electrode scan line 5 is connected with second touch control unit；
The first touch-control driver element 8 was used within second period t2, and scanning letter is sent to the segment electrode scan line 2
Number, the second touch-control driver element 9 was used within second period t2, sends and scans to the public electrode scan line 5
Signal, to realize the detection to the capacitance between the public electrode 6 and segment electrode 3.It is described within second period t2
Segment electrode 3 constitutes the two poles of the earth of electric capacity with public electrode 6, and when there is finger touch, coupled capacitor changes, and the first touch-control drives
The touch-control driver element 9 of moving cell 8 or second detects the variable quantity of coupled capacitor, the position that finger touches is determined, so as to realize
Touch-control sensing function.
It should be noted that " connected " described in the present embodiment refers to that both are electrical connected, mutually it is conducted.
Specifically, switch control unit 7 controls the first contact a alternately to contact conducting with the second contact b and the 3rd contact c,
The 4th contact A is controlled alternately to contact conducting with the 5th contact B and the 6th contact C simultaneously.When the control of switch control unit 7 first is opened
When pass S1 the first contact a turns on the second contact b, the first contact a and the 3rd contact c is off, segment electrode driving
Unit 1 electrically connects with segment electrode scan line 2, and segment electrode driver element 1 can export scanning signal to segment electrode scan line 2, with
Segment electrode scan line 2 is scanned, and then drives the segment electrode 3 being connected with segment electrode scan line 2；At the same time, switch control
Unit 7 processed controls second switch S2 the 4th contact A to be turned on the 5th contact B, and the 4th contact A is in the 6th contact C to be disconnected
State, common electrode drive unit 4 electrically connect with public electrode scan line 5, and common electrode drive unit 4 scans to public electrode
Line 5 exports scanning signal, to be scanned to public electrode scan line 5, and then drives the public affairs being connected with public electrode scan line 5
Common electrode 6；Therefore segment electrode 3 is applied in alternating voltage with public electrode 6, and then drives liquid crystal molecule therebetween inclined
Turn, liquid crystal display is carried out the display of figure.
When switch control unit 7 controls first switch S1 the first contact a to be turned on the 3rd contact c, the first contact a and
Second contact b is off, and the first touch-control driver element 8 electrically connects with segment electrode scan line 2, and touch-control driver element can be with
Scanning signal is exported to segment electrode scan line 2, to be scanned to segment electrode scan line 2, and then realization pair scans with segment electrode
The detection of the connected segment electrode 3 of line 2；At the same time, switch control unit 7 controls second switch S2 the 4th contact A and the 6th
Contact C is turned on, and the 4th contact A is off with the 5th contact B, the second touch-control driver element 9 and public electrode scan line 5
Electrical connection, the second touch-control driver element 9 can export scanning signal to public electrode scan line 5, with to public electrode scan line 5
It is scanned, and then realizes the detection for the public electrode 6 being connected with public electrode scan line 5；Pass through said process, public electrode
Coupled capacitor is formed between 6 and segment electrode 3, when there is finger touch, coupled capacitor can change, the first touch-control driver element 8
Or second touch-control driver element 9 judge the variable quantity of detection coupled capacitor, determine the position that finger touches, and carry out corresponding
Touch controllable function processing.
It is emphasized that switch control unit 7 need to by the first contact a and the second contact b to first switch S1 and
Second switch S2 the 4th contact A and the control of the 5th contact B contact ON time, to control liquid crystal display to carry out figure
The duration of display, this when a length of first period t1；Accordingly, switch control unit 7 is also needed by first to first switch S1
Contact a and the 3rd contact c and second switch S2 the 4th contact A and the control of the 6th contact C contact ON time, to control
Liquid crystal display carry out touch-control sensing duration, this when a length of second period t2.
An as shown in figure 4, frame picture in the present embodiment（That is a drive cycle）The turntable driving time can be divided into one section
Picture displaying time（That is the first period t1）With one touch-control sensing time（That is the second period t2）, because liquid crystal display is entering
Basic time unit during row turntable driving is frame, so the first period t1 and the second period t2 are alternately, to show
It is in the course of work of actual drive circuits：Switch control unit 7 controls first switch S1 the first contact a and the second contact b
The 4th contact A and the first period t1 of the 5th contact B progress conducting with control second switch S2, control the first contact a afterwards
Disconnected with the second contact b, and the first contact a and the 3rd contact c is carried out the second period t2 conducting, and control the 4th contact A
Disconnected with the 5th contact B, and the 4th contact A is carried out the second period t2 conducting with the 6th contact, control first to touch again afterwards
Point a and the 3rd contact c disconnects, and the first contact a and the second contact b is carried out the first period t1 conducting ..., so repeats.
An in addition, as shown in figure 5, frame picture in the present embodiment（That is a drive cycle）The turntable driving time can also divide
For one touch-control sensing time（That is the first period t1）The time is shown with a segment figure（That is the second period t2）, due to liquid crystal display
Basic time unit of the device when being scanned driving is frame, so the first period t1 and the second period t2 are alternately,
Show in the course of work of actual drive circuits and be：Switch control unit 7 controls first switch S1 the first contact a and the 3rd
Contact c and control second switch S2 the 4th contact A carry out the first period t1 conducting with the 6th contact C, control first afterwards
Contact a and the 3rd contact c disconnects, and the first contact a and the second contact b is carried out the second period t2 conducting, and controls the 4th
Contact A disconnects with the 6th contact C, and the 4th contact A is carried out the second period t2 conducting with the 5th contact B, controls again afterwards
First contact a and the second contact b disconnects, and makes the first period t1 of the first contact a and the 3rd contact c progress conducting ..., such as
This is repeated.
In the present embodiment, the first switch S1 and second switch S2 are respectively preferably insulated-gate type field effect transistor.
In the section type liquid crystal display drive circuit that the present embodiment is provided, when the switch control unit 7 is preferably
Sequence control circuit.
In process of production, the program time of sequential control circuit can will be set according to actual conditions（That is the first period with
Second period t2）, after liquid crystal display is opened, sequential control circuit will carry out different contacts automatically according to the program set
Between contact the switch operating of conducting.
In the present embodiment, the first touch-control driver element 8 and the second touch-control driver element 9 are respectively analog-to-digital conversion electricity
Road.
When the capacitance variation between segment electrode 3 and public electrode 6（Such as hand touch display screen）, analog to digital conversion circuit meeting
The magnitude of voltage between segment electrode 3 and public electrode 6 is detected, and the magnitude of voltage is converted into data signal by analog signal, is carried out
Feedback.
The section type liquid crystal display drive circuit that the present embodiment is provided increases on the basis of prior art drive circuit
Add first switch S1, second switch S2, the touch-control driver element 8 of switch control unit 7 and first, the second touch-control driver element 9,
Make a section type liquid crystal display on the basis of with display function, realize touch controllable function, and be mutual capacitance type touch control function, phase
It is stronger than the touch sensible of self-capacitance, its stability against atmospheric influence.
On the other hand, present many electronic equipments are for signal to noise ratio（SNR）There are higher requirement, such as MP3 player,
If signal to noise ratio is too low to influence tonequality；Such as portable DVD player, signal to noise ratio at least should just meet standard more than 70 decibels,
A section type liquid crystal display provided in an embodiment of the present invention with mutual capacitance type touch control function can effectively lift signal to noise ratio, and
The ratio of signal to noise ratio is bigger, and effect is better.
The embodiment of the present invention additionally provides an a kind of section type liquid crystal display driving method, applied to pen section described above
Formula liquid crystal display drive circuit.
Embodiment one
As shown in Fig. 2 described section type liquid crystal display driving method includes：
In the first period t1, the first contact for controlling first switch S1 using switch control unit 7 turns on the second contact,
So that segment electrode scan line 2 is connected with segment electrode driver element 1, and control second switch S2 the 4th contact is led with the 5th contact
It is logical, so that public electrode scan line 5 is connected with common electrode drive unit 4；
Scanning signal is sent to the segment electrode scan line 2 using the segment electrode driver element 1, while is driven using public electrode
Moving cell 4 sends scanning signal to public electrode scan line 5, to realize the display of image；
In the second period t2, the first contact of the first switch S1 and the 3rd is controlled to touch using the switch control unit 7
Point conducting, so that the segment electrode scan line 2 is connected with the first touch-control driver element 8, and control the of the second switch S2
Four contacts turn on the 6th contact, so that the public electrode scan line 5 is connected with the second touch-control driver element 9；
Scanning signal is sent to the segment electrode scan line 2 using the first touch-control driver element 8, while utilizes described the
Two touch-control driver elements 9 send scanning signal to the public electrode scan line 5, to realize to the segment electrode 3 and common electrical
The detection of capacitance between pole 6.
In above-mentioned driving method, figure shows scanning is carried out in the first period t1, touch-control is carried out in the second period t2
Sensitive scanning, completes the sweep time of a cycle, repeats alternately figure shows and touch-control sensing, repetition period afterwards
Add the second period t2 for the first period t1.
Embodiment two
As shown in figure 3, described section type liquid crystal display driving method includes：
In the first period t1, the first contact for controlling first switch S1 using switch control unit 7 turns on the 3rd contact,
So that segment electrode scan line 2 is connected with the first touch-control driver element 8, and control second switch S2 the 4th contact and the 6th contact
Conducting, so that public electrode scan line 5 is connected with the second touch-control driver element 9；
Scanning signal is sent to the segment electrode scan line 2 using the first touch-control driver element 8, while utilizes the second touch-control
Driver element 9 sends scanning signal to public electrode scan line 5, to realize to the electricity between the segment electrode 3 and public electrode 6
The detection of capacitance；
In the second period t2, the first contact of the first switch S1 and second is controlled to touch using the switch control unit 7
Point conducting, so that the segment electrode scan line 2 is connected with segment electrode driver element 1, and the 4th of the control second switch S2 the
Contact turns on the 5th contact, so that the public electrode scan line 5 is connected with common electrode drive unit 4；
Scanning signal is sent to the segment electrode scan line 2 using the segment electrode driver element 1, while is utilized described public
Electrode drive unit 4 sends scanning signal to the public electrode scan line 5, to realize the display of image.
In above-mentioned driving method, touch-control sensing scanning is carried out in the first period t1, figure is carried out in the second period t2
Display scanning, completes the sweep time of a cycle, repeats alternately touch-control sensing and figure shows, repetition period afterwards
Add the second period t2 for the first period t1.
That is the present embodiment two and first period t1 and second period t2 of the embodiment one in drive cycle priority
Order interchangeable, circuit design can be carried out according to the actual conditions of the equipment of an application section type liquid crystal display, and then realized
Touch-control and the order of display are exchanged.Such as at this moment it is mainly to show ice when switch refrigerator doors action on intelligent refrigerator
Based on the on off state of the temperature inside the box and door, not using touch controllable function, it at this moment may consider first to show, rear this sequential of touch-control
Circuit design；It is first to use touch controllable function, intelligence system passes through touch-control when the function of the temperature or refrigeration mode that adjust refrigerator
Sensing completes display after carrying out A/D conversions, is at this moment exactly first touch-control, shows this Sequential Circuit Design afterwards.
By taking a section type liquid crystal display for 1/4 dutycycle as an example, a segment liquid crystal that Fig. 4, Fig. 5 are provided by the present embodiment
Two driving method timing diagrams of display.Wherein, VLCD, 2/3VLCD, 1/3VLCD and VSS represent different output voltages,
COM1, COM2, COM3 and COM4 represent different public electrode scan lines 5, and Tframe represents a frame picture（I.e. one driving week
Phase）The turntable driving time.
By taking Fig. 4 as an example, the driving method for the section type liquid crystal display that the present embodiment is provided, by the scanning of a frame picture
It is two periods that driving time Tframe, which is divided to,：First period t1 and the second period t2, the first period t1 is to public electrode scan line
After 5COM1~COM4 is scanned, the second period t2 is scanned to public electrode scan line 5 again, and the first period t1
In carry out simultaneously also have scanning of the segment electrode driver element 1 to segment electrode scan line 2, carry out simultaneously in the second period t2 also
There are scanning and second touch-control driver element 9 of the first touch-control driver element 8 to segment electrode scan line 2 to public electrode scan line 5
Scanning so that the turntable driving time Tframe of a frame picture includes a segment figure and shows the time and during one section of touch-control sensing
Between.
Due to touching using mutual capacitance type in a section type liquid crystal display driving method provided in the embodiment of the present invention
Sensing is touched, makes the stability against atmospheric influence of liquid crystal display strong, in the equipment such as the hand-held class that is particularly suitable for use in or use battery powered.
In actual application, the public electrode scan line 5 of a section type liquid crystal display is preferably a plurality of, and described
One period t1 includes and the same number of first sub-period of the public electrode scan line 5, and each first sub-period phase
Deng；
It is described to send scanning signal to the segment electrode scan line 2 using the segment electrode driver element 1, while utilize common electrical
Pole driver element 4 sends scanning signal to public electrode scan line 5, to realize being shown as image：Driven using the segment electrode
Moving cell 1 sends scanning signal to the segment electrode scan line 2, while using the common electrode drive unit 4 sequentially to every
Public electrode scan line 5 described in bar sends the scanning signal of first sub-period, to realize the display of image.
It should be noted that second period t2 can be with equal or unequal with first sub-period.
Second period t2 preferably includes multiple the second equal sub-periods, second sub-period and described first
Sub-period can be with equal or unequal.
In addition, the ratio between the first period t1 and the second period t2（Picture displaying time and the ratio of touch-control sensing time
Example）It is preferred that it can be determined according to the dutycycle of a section type liquid crystal display and the number of touch key-press.Lead to for picture displaying time
Normal 16.7 milliseconds.For the touch-control sensing time, as long as in theory in the first touch-control driver element 8 and the second touch-control driver element 9
The analog to digital conversion circuit in portion converts, and the time is generally several milliseconds to a few tens of milliseconds.
A section type liquid crystal display drive circuit in the embodiment of the present invention is mainly used in portable media player
(PMP), computer, POS terminals, industrial control instrument equipment and other home electronics.
It is last it should be noted that above example is only illustrating the technical scheme of the embodiment of the present invention rather than it is entered
Row limitation, although the embodiment of the present invention is described in detail with reference to preferred embodiment, one of ordinary skill in the art
It should be understood that can still be modified to the technical scheme of the embodiment of the present invention or equivalent substitution, and these modifications or wait
The scope of amended technical scheme disengaging technical scheme of the embodiment of the present invention can not also be made with replacement.
Claims (10)
1. an a kind of section type liquid crystal display drive circuit, including：Segment electrode driver element, segment electrode scan line, segment electrode, public affairs
Common electrode driver element, public electrode scan line and public electrode, each drive of described section type liquid crystal display drive circuit
The dynamic cycle includes first period and second period, it is characterised in that the drive circuit also includes：First switch,
Second switch, switch control unit and the first touch-control driver element, the second touch-control driver element；
Wherein, the first switch includes the first contact a, the second contact b and the 3rd contact c, the first contact a with it is described
Segment electrode scan line is connected, and the second contact b is connected with the segment electrode driver element, the 3rd contact c and described the
One touch-control driver element is connected, and the first switch is used to turn on first contact under the control of the switch control unit
A and the second contact b or conducting the first contact a and the 3rd contact c；
The second switch includes the 4th contact A, the 5th contact B and the 6th contact C, the 4th contact A and the common electrical
Pole scan line is connected, and the 5th contact B is connected with the common electrode drive unit, the 6th contact C and described second
Touch-control driver element is connected, and the second switch is used to turn on the 4th contact A under the control of the switch control unit
With the 5th contact B or conducting the 4th contact A and the 6th contact C；
Described switch control unit one end is connected with the first switch, and the other end is connected with the second switch, in institute
State in the first period, control the first contact a of the first switch to be turned on the second contact b, so that the segment electrode scan line
It is connected with the segment electrode driver element, and the 4th contact A of the control second switch turns on the 5th contact B, so that institute
Public electrode scan line is stated with the common electrode drive unit to be connected；Within second period, the first switch is controlled
The first contact a turned on the 3rd contact c so that the segment electrode scan line and the first touch-control driver element phase
Even, turned on the 4th contact A of the control second switch with the 6th contact C so that the public electrode scan line with it is described
Second touch control unit is connected；
The first touch-control driver element was used within second period, and scanning signal is sent to the segment electrode scan line,
The second touch-control driver element was used within second period, and scanning signal is sent to the public electrode scan line, with
Realize the detection to the capacitance between the public electrode and segment electrode.
2. as claimed in claim 1 section type liquid crystal display drive circuit, it is characterised in that the switch control unit is
Sequential control circuit.
3. as claimed in claim 1 section type liquid crystal display drive circuit, it is characterised in that in a drive cycle
The sequencing interchangeable of one period and the second period.
4. as claimed in claim 1 section type liquid crystal display drive circuit, it is characterised in that the first touch-control driving is single
Member and the second touch-control driver element are respectively analog to digital conversion circuit.
5. as claimed in claim 1 section type liquid crystal display drive circuit, it is characterised in that the first switch and second
Switch is respectively insulated-gate type field effect transistor.
A kind of 6. driving side for being applied to the section type liquid crystal display drive circuit as described in any one of claim 1-5
Method, it is characterised in that the driving method includes：
Within the first period, the first contact for controlling first switch using switch control unit turns on the second contact, so that section
Electrode scan line is connected with segment electrode driver element, and the 4th contact of control second switch turns on the 5th contact, so that public
Common electrode scan line is connected with common electrode drive unit；
Scanning signal is sent to the segment electrode scan line using the segment electrode driver element, while utilizes common electrode drive
Unit sends scanning signal to public electrode scan line, to realize the display of image；
Within the second period, the first contact for controlling the first switch using the switch control unit is led with the 3rd contact
It is logical so that the segment electrode scan line is connected with the first touch-control driver element, and the 4th contact of the control second switch and
6th contact turns on, so that the public electrode scan line is connected with the second touch-control driver element；
Scanning signal is sent to the segment electrode scan line using the first touch-control driver element, while utilizes described second
Touch-control driver element sends scanning signal to the public electrode scan line, to realize between the segment electrode and public electrode
Capacitance detection.
7. as claimed in claim 6 section type liquid crystal display driving method, it is characterised in that first period and second
The sequencing interchangeable of period.
8. as claimed in claim 6 section type liquid crystal display driving method a, it is characterised in that section type liquid crystal display
Public electrode scan line is a plurality of, and first period includes and first period of the day from 11 p.m. to 1 a.m of the public electrode number of scanning lines identical
Section, and each first sub-period is equal；
It is described to send scanning signal to the segment electrode scan line using the segment electrode driver element, while utilize public electrode
Driver element sends scanning signal to public electrode scan line, to realize being shown as image：Driven using the segment electrode single
Member sends scanning signal to the segment electrode scan line, while using the common electrode drive unit sequentially to public affairs every described
Common electrode scan line sends the scanning signal of first sub-period, to realize the display of image.
9. as claimed in claim 8 section type liquid crystal display driving method, it is characterised in that second period with it is described
First sub-period is equal or unequal.
10. as claimed in claim 8 section type liquid crystal display driving method, it is characterised in that second period includes
Multiple the second equal sub-periods, second sub-period and first sub-period are equal or unequal.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201711131824.2A CN107863076B (en) | 2017-11-15 | 2017-11-15 | Stroke-segment type liquid crystal display driving circuit and driving method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201711131824.2A CN107863076B (en) | 2017-11-15 | 2017-11-15 | Stroke-segment type liquid crystal display driving circuit and driving method |
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| Publication Number | Publication Date |
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| CN107863076A true CN107863076A (en) | 2018-03-30 |
| CN107863076B CN107863076B (en) | 2020-07-31 |
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| CN107863076B (en) | 2020-07-31 |
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