CN108922468A - The voltage control method and control device of touch display panel - Google Patents
The voltage control method and control device of touch display panel Download PDFInfo
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- CN108922468A CN108922468A CN201810681146.5A CN201810681146A CN108922468A CN 108922468 A CN108922468 A CN 108922468A CN 201810681146 A CN201810681146 A CN 201810681146A CN 108922468 A CN108922468 A CN 108922468A
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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
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/0416—Control or interface arrangements specially adapted for digitisers
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- Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- General Engineering & Computer Science (AREA)
- Computer Hardware Design (AREA)
- Human Computer Interaction (AREA)
- Position Input By Displaying (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
Abstract
This application discloses a kind of voltage control method of touch display panel and device, the voltage control method of the touch display panel includes：Display scanning is carried out in the display stage；After the display end of scan, the voltage of source electrode line and preservation are recorded；Touch-control scanning is carried out in the touch-control stage；After the touch-control stage, restore the voltage of the source electrode line, influence display scanning by touch-control scanning, thus panel band phenomenon caused by source line voltage changes during avoiding scanning as touch-control.
Description
Technical field
The present invention relates to technical field of touch-control display, more particularly, to a kind of voltage controlling party of touch display panel
Method and control device.
Background technique
With advances in technology, it touches display technology and is increasingly being applied to every field, show quality for touching
Requirement it is also higher and higher.For example, touch-control and display driver in an intelligent terminal integrates (Touch and Display
Driver Integration, referred to as TDDI) system by touch-control sensing and display driving function be incorporated into one chip, energy
Enough reduce the cost of intelligent touch screen terminal.
Touching (Touch) detection technique at present includes interframe touch control detection (LVB, the Long that report point rate is 60 hertz (Hz)
Vertical Blank) technology and report point rate be 120Hz frame in touch control detection (LHB, Long Horizontal Blank) skill
Art.Existing embedded liquid crystal display panel generally uses TDDI LHB touch control manner, i.e., in week time of TDDI control
Interim portion of time is scanned for controlling display, portion of time for touch-control, and 1, which shows that frame (display frame) is inner, touches
Control (Touch) can scan two frames, i.e., section gap is inserted into the touch-control stage during display.Display panel is generally divided into multiple row
Touch control electrode, each column touch control electrode time-sharing multiplex public electrode Tx charge.
Fig. 1 shows the timing diagram of the LHB scan pattern of the touch display unit of the prior art.LHB scanning mode exists
Insertion portion touch-control scans after display scans a certain number of rows, and the mode of such mixed sweep carries out.I.e. in normal display
It can be interrupted by touch-control scanning, due to that level on source electrode line can be made to change during touch-control scanning, as shown in Figure 1, the display stage
Grid line is scanned, and source electrode line provides data, and in the touch-control stage, grid line stops scanning, and touch chip is from induction electrode Rx
Upper acquisition touch signal, source electrode line suspend data transmission.When equal touch-controls scanning completes to be further continued for display scanning, because on source electrode line
Initial level and the case where non-TDDI, are inconsistent, and back to back display line display is abnormal after the completion of touch-control scanning, are easy by people
Outlook is other, that is, LHB band occurs.
Summary of the invention
In view of this, the main technical problem to be solved in the present invention is to provide a kind of voltage controlling party of touch display panel
Method and control device, to avoid the band phenomenon of touch-control display panel.
According to the first aspect of the invention, a kind of voltage control method of touch display panel is provided, including：In display rank
Duan Jinhang display scanning；After the display end of scan, the voltage of source electrode line and preservation are recorded；Touch-control is carried out in the touch-control stage to sweep
It retouches；After the touch-control stage, restore the voltage of the source electrode line.
Preferably, the voltage for restoring the source electrode line includes：It, will be on source electrode line at this time after the touch-control stage
Voltage is adjusted to the voltage of the source electrode line saved.
Preferably, in each frame period, the display stage and the touch-control stage are alternately.
Preferably, each display stage carries out multirow display scanning.
Preferably, the display stage carries out multirow and shows that scanning includes：Corresponding line is successively gated using a plurality of grid line
Pixel unit.
Preferably, the touch display panel includes optical touch display panel, electric resistance type touch control display panel, electricity
Any one in magnetic-type touch-control display panel, sound wave type touch-control display panel and capacitance type touch control display panel.
According to the second aspect of the invention, a kind of voltage-operated device of touch display panel is provided, including：Detect mould
Block, for collecting the voltage magnitude on each source electrode line；Memory module is connect, for will test mould with the detection module
Voltage magnitude on the collected each source electrode line of block stores；Recovery module is connect with memory module, and being used for will be described
Voltage magnitude on each source electrode line restores.
Preferably, the detection module work is after the display stage, before the touch-control stage starts.
Preferably, the recovery module work is after the touch-control stage, before the display stage starts.
Preferably, the memory module includes time delay module, for the voltage magnitude of each source electrode line to be delayed one section
The recovery module is input to after time again.
Preferably, in each frame period, the display stage and the touch-control stage are alternately.
Preferably, the touch display panel includes optical touch display panel, electric resistance type touch control display panel, electricity
Any one in magnetic-type touch-control display panel, sound wave type touch-control display panel and capacitance type touch control display panel.
The voltage control method and device of touch display panel provided by the invention are being shown in a scan period
The voltage on each source electrode line can be stored after the completion of scanning in time, and can will be on each source electrode line before starting again at display scanning
Voltage restores, and influences display scanning by touch-control scanning, so that source line voltage changes during avoiding scanning due to touch-control
Caused by panel band phenomenon.
Detailed description of the invention
By referring to the drawings to the description of the embodiment of the present invention, above-mentioned and other purposes of the invention, feature and
Advantage will be apparent from, in the accompanying drawings：
Fig. 1 shows the timing diagram of the H scan pattern of the touch display unit of the prior art.
Fig. 2 shows the equivalent circuit diagrams of display device according to an embodiment of the present invention.
Fig. 3 shows the equivalent circuit diagram of touch device according to an embodiment of the present invention.
Fig. 4 shows the attachment structure schematic diagram of touch display unit according to an embodiment of the present invention.
Fig. 5 shows the scanning sequence figure of touch display panel according to an embodiment of the present invention.
Fig. 6 shows the flow chart of the voltage control method of touch display panel according to an embodiment of the present invention.
Fig. 7 shows the schematic block diagram of the voltage-operated device of touch display panel according to an embodiment of the present invention.
Specific embodiment
Hereinafter reference will be made to the drawings, and the present invention will be described in more detail.In various figures, identical element is using similar attached
Icon is remembered to indicate.For the sake of clarity, the various pieces in attached drawing are not necessarily to scale.Furthermore, it is possible to be not shown certain
Well known part.
Many specific details of the invention are described hereinafter, to be more clearly understood that the present invention.But as this
The technical staff in field it will be appreciated that as, can not realize the present invention according to these specific details.
The present invention can be presented in a variety of manners, some of them embodiment explained below.Fig. 2 and Fig. 3 are respectively illustrated
The equivalent circuit diagram of display device according to an embodiment of the present invention and touch device.
In Fig. 2 with liquid crystal display device be illustrated display device 110 according to an embodiment of the present invention.Such as Fig. 2 institute
Show, display device 110 includes grid electrode drive module 111, source drive module 112, multiple thin film transistor (TFT) T and in pixel
The multiple pixel capacitance C formed between electrode and public electrodeLC.The multiple thin film transistor (TFT) T forms array.Gate driving mould
Block 111 is respectively connected to the grid of the thin film transistor (TFT) T of corresponding line via a plurality of controlling grid scan line G1 to Gm, for scanning
Mode provides grid voltage G1 to Gm, to gate the thin film transistor (TFT) that do not go together in a picture frame period.Source drive
Module 112 is respectively connected to the source electrode of the thin film transistor (TFT) T of respective column via a plurality of source data line S1 to Sn, in each row
Multiple thin film transistor (TFT) T gating when, it is electric to provide corresponding with grayscale grayscale to multiple thin film transistor (TFT) T of each column respectively
Pressure.Wherein, m and n is natural number.The drain electrode of the multiple thin film transistor (TFT) T is respectively connected to a corresponding pixel capacitance CLC。
Under strobe state, source drive module 112 is applied to pixel via source data line and thin film transistor (TFT) T, by gray scale voltage
Capacitor CLCOn.Pixel capacitance CLCOn voltage act on liquid crystal molecule, to change the orientation of liquid crystal molecule, with realize with
The corresponding light transmittance of grayscale.In order to keep voltage, pixel capacitance C between the update cycle of pixelLCIt can storage electricity in parallel
Hold Cs to obtain the longer retention time.
It is to illustrate the internal structure and connection relationship of display device by taking liquid crystal display device as an example in the present embodiment, but this hair
Bright display device is not limited to liquid crystal display device.
In Fig. 3 with capacitance touching control be illustrated touch device 120 according to an embodiment of the present invention.As shown in figure 3,
Touch device 120 includes touching drive module 121, touch sensible module 122 and the shape between excitation electrode and induction electrode
At multiple inductance capacitance C.The multiple inductance capacitance C forms array.Drive module 121 is touched via scan line TX1 to TXm
It is connected to the excitation electrode of all rows, for providing pumping signal in a manner of scanning, thus in a touch-control frame period, according to
It is secondary to provide pumping signal to the excitation electrode that do not go together.Touch sensible module 122 is connected to all via line of induction RX1 to RXn
The induction electrode of column, to receive the inductive signal of respective column.Wherein, m and n is natural number.Drive module 121 is touched for example to produce
For raw ac signal as pumping signal, touch sensible module 122 for example receives the inductive signal of ac signal form, according to
Inductive signal detects current value, and the capacitor of driving electrodes and induction electrode crosspoint is further obtained according to the size of current value
Value, to judge whether to generate touch action in the point.
Although the cabling number in display device and touch device, art technology are described by taking m and n as an example above
Personnel it should be clear that more than be intended merely to facilitate description, the cabling number in practical application in display device and touch device is not
It is certain identical.And the present embodiment is only the structure and working principle for illustrating touch device by taking mutual capacitance type touch control as an example, but ability
Field technique personnel are it should be clear that the above is only an examples of touch device, and touch device of the invention is without being limited thereto.
Fig. 4 shows the attachment structure schematic diagram of touch display unit according to an embodiment of the present invention.As shown in figure 4, touching
Touching display device includes touching display control unit 100 and touch display panel 200.
Touching display control unit 100 may include display control module 101 and contact control module 102.Display control
Module 101 may include above-mentioned grid electrode drive module 111, source drive module 112.Contact control module 102 may include
Above-mentioned touch drive module 121 and touch sensible module 122.Display control module 101 and contact control module 102 can be set
Individual chips are set to, can also be for example, by using TDDI Integration ofTechnology in a chips, touch detection and display driving are with timesharing
Mode carry out.
Fig. 5 shows the scanning sequence figure of touch display panel according to an embodiment of the present invention.
The embedded liquid crystal display panel of the present embodiment uses TDDI LHB (Touch and Display Driver
Integration Long HBlanking, touch-control and display driver are integrated) touch control manner, in TDDI control, H mode is swept
The mode of retouching is that touch-control and display timesharing carry out, and section gap is inserted into the touch-control stage during display, i.e., certain in display scanning
Insertion portion touch-control scans after the row of quantity, and the mode of such mixed sweep carries out.The 1 display frame (display under H mode
Frame) inner touch-control can scan two frames, and report point rate is defaulted as 120Hz.
In touch-control and display integrated system, touch-control (touch) scanning is vertical with the display scanning direction of (display),
As shown, in a frame period, each display stage carries out multirow display scanning.Preferably, the row being scanned every time
Quantity is identical.For example, being inserted into column touch-control scanning after the display scanning of 4 rows of every progress.When the display cycle starts, grid line
Gate1-Gate4 is successively scanned, and the pixel unit of corresponding line is successively gated using a plurality of grid line, and source electrode line conveying is aobvious
Registration evidence, when gate lines G ate4 scanning after the completion of, touch-control starts to scan, grid line stop scanning, touch control chip start from
Touch data is received on induction electrode Rx, has detected whether touch signal.Touch-control scans through followed by the 5th row of display, then starts
Into a display stage, gate lines G ate5-Gate8 is successively scanned, and gates the pixel unit of corresponding line, source electrode line
Conveying display data, after the completion of gate lines G ate8 scanning, touch-control starts to scan, and grid line stops scanning, so recycles, often
Four grid line run-downs are as a display stage, and in each frame period, display stage and touch-control stage are alternately.
The difference of this scanning mode and the scanning mode of common non-TDDI is exactly that can be scanned to beat by touch-control in normal display
Disconnected, since coupling etc. influences during touch-control scanning, the level on source electrode line can change, and touch-controls scanning is waited to complete to be further continued for showing
When showing because on source electrode line initial level and the case where non-TDDI it is inconsistent, back to back display line after the completion of causing touch-control to scan
Display is abnormal, so H band phenomenon is shown in that row that and then touch-control scanning can occur.
The present invention slightly improves scanning mode, when so that carrying out display scanning again after touch-control scanning, source electrode line
On the scanning of level and touch-control before it is consistent, to avoid band phenomenon.Illustrate solution party of the invention below with reference to Fig. 6
Method.
Fig. 6 shows the flow chart of the voltage control method of touch display panel according to an embodiment of the present invention.
In the LHB scanning mode of TDDI of the present invention, display stage and touch-control stage are alternately.Show phase gate line
Gate4 starts touch-control scanning after scanning through the 4th row, first collects on each source electrode line firstly the need of before touch-control scanning at this time
Voltage is simultaneously recorded, and is waited before being first restored to the voltage on source electrode line before starting again at display scanning after completing touch-control scanning
The voltage magnitude recorded carries out display scanning later, then shows the 5th row, has shown and has started again after eighth row shows data
Source line voltage is acquired, then carries out touch-control scanning, is repeated as follows.Specific step is as follows, which includes step S01-
Step S04.
In step S01, the display stage carries out display scanning.In the initial display stage of scan period and in scanning week
Other display stages of phase carry out the display scanning of 4 rows, and 4 adjacent grid lines do gated sweep, and a plurality of grid line successively gates
The pixel unit of corresponding line.
In step S02, source line voltage is recorded, Vsource is saved as.It is successively carried out in 4 grid lines of display stage
After complete scanning, detects the voltage on each source electrode line at this time and be stored as Vsource.
In step S03, the touch-control stage carries out touch-control scanning.After being stored the data of source electrode line, suspend grid
Pole scanning, carries out touch-control scanning, and touch control chip starts to receive touch data from induction electrode.
In step S04, restore source line voltage to Vsource.After the completion of touching scanning, by the voltage on source electrode line
Storage value Vsource before being restored to, i.e., be adjusted to the source electrode line saved in step S02 for the voltage on source electrode line at this time
Voltage, then it is transferred to step S01, the new display stage is initially entered, the scanning of next 4 grid lines is carried out, so recycles
Until a frame end cycle.
Since first the voltage on source electrode line at this time being stored before carrying out touch-control scanning, then before carrying out new display scanning
The voltage on source electrode line is restored again, before thereby may be ensured that level and touch-control before and after touch-control scans on source electrode line scan
It is consistent, reduce touch-control scanning influence, to avoid band phenomenon.
Preferably, the touch display panel in the present embodiment can select optical touch display panel, electric resistance touch-control
It is any one in display panel, electromagnetic touch-control display panel, sound wave type touch-control display panel and capacitance type touch control display panel
Kind.
Fig. 7 shows the schematic block diagram of the voltage-operated device of touch display panel according to an embodiment of the present invention.Root
According to the second aspect of the present invention, a kind of voltage-operated device 10 of touch display panel is provided, which can be with
Voltage and storage before touch-control scans on each source electrode line of acquisition can also start again at display scanning after completing touch-control scanning
The voltage magnitude that the preceding voltage by source electrode line is recorded before being restored to.The electricity of the touch display panel of the embodiment of the present invention
Pressure control device 10 includes detection module 11, memory module 12, recovery module 13.
Detection module 11 is used to detect the finish time in display stage, and collects each source electrode before touch-control scanning starts
Voltage magnitude on line.
Memory module 12 is connect with detection module 11, for will test the voltage amplitude on the collected each source electrode line of module 11
Value is stored and is kept constant.
Recovery module 13 is connect with memory module 12, for restoring the voltage on each source electrode line after the completion of touch-control scans
To the voltage magnitude recorded before, then start again at into the display stage.Preferably, memory module 12 may include prolonging
When module, will preservation source line voltage delay a period of time after be input to recovery module 13 again, when avoiding the touch-control end of scan
But display scanning does not have started to cause the jump of voltage and display abnormal.
Preferably, detection module 11 is, for example, the switch elements and ADC etc. such as transistor, and memory module 12 is, for example, capacitor
C, inductance L and the energy storing structure being made of similar passive element, recovery module 13 switch member such as may be transistor
Part.
Preferably, the touch display panel in the present embodiment can select optical touch display panel, electric resistance touch-control
It is any one in display panel, electromagnetic touch-control display panel, sound wave type touch-control display panel and capacitance type touch control display panel
Kind.
The voltage control method and device of touch display panel of the invention scan through in a scan period in display
Cheng Houneng stores the voltage on each source electrode line in time, and can be extensive by the voltage on each source electrode line before starting again at display scanning
It is multiple, influence display scanning by touch-control scanning, thus caused by source line voltage changes during avoiding scanning as touch-control
Panel band phenomenon.
It should be noted that herein, such as one and it is another and first and second or the like relational terms only
For distinguishing one entity or operation from another entity or operation, without necessarily requiring or implying these entities
Or there are any actual relationship or orders between operation.Moreover, the terms "include", "comprise" or its any other
Variant is intended to non-exclusive inclusion, so that the process, method, article or equipment including a series of elements is not only
It including those elements, but also including other elements that are not explicitly listed, or further include for this process, method, object
Product or the intrinsic element of equipment.In the absence of more restrictions, the element limited by sentence "including a ...",
It is not precluded in the process, method, article or apparatus that includes the element that there is also other identical elements.
It is as described above according to the embodiment of the present invention, these embodiments details all there is no detailed descriptionthe, also not
Limiting the invention is only the specific embodiment.Obviously, as described above, can make many modifications and variations.This explanation
These embodiments are chosen and specifically described to book, is principle and practical application in order to better explain the present invention, thus belonging to making
Technical field technical staff can be used using modification of the invention and on the basis of the present invention well.
Claims (12)
1. a kind of voltage control method of touch display panel, wherein including：
Display scanning is carried out in the display stage；
After the display end of scan, the voltage of source electrode line and preservation are recorded；
Touch-control scanning is carried out in the touch-control stage；
After the touch-control stage, restore the voltage of the source electrode line.
2. the voltage control method of touch display panel according to claim 1, wherein the recovery source electrode line
Voltage includes：After the touch-control stage, the voltage for the source electrode line that the voltage on source electrode line at this time is adjusted to save.
3. the voltage control method of touch display panel according to claim 1, wherein described in each frame period
Display stage and the touch-control stage are alternately.
4. the voltage control method of touch display panel according to claim 3, wherein each display stage carries out
Multirow display scanning.
5. the voltage control method of touch display panel according to claim 4, wherein the display stage carries out multirow
Display scans：The pixel unit of corresponding line is successively gated using a plurality of grid line.
6. the voltage control method of touch display panel according to any one of claims 1-5, wherein described touch shows
Show that panel includes, optical touch display panel, electric resistance type touch control display panel, electromagnetic touch-control display panel, sound wave type touching
Control any one in display panel and capacitance type touch control display panel.
7. a kind of voltage-operated device of touch display panel, wherein including：
Detection module, for collecting the voltage magnitude on each source electrode line in each frame period；
Memory module is connect with the detection module, for will test the voltage amplitude on the collected each source electrode line of module
Value stores；
Recovery module is connect with memory module, for restoring the voltage magnitude on each source electrode line.
8. the voltage-operated device of touch display panel according to claim 7, wherein in each frame period,
Display stage and touch-control stage are alternately.
9. the voltage-operated device of touch display panel according to claim 8, wherein the detection module work is in institute
After stating the display stage, before the touch-control stage starts.
10. the voltage-operated device of touch display panel according to claim 8, wherein the recovery module work exists
After the touch-control stage, before the display stage starts.
11. the voltage-operated device of touch display panel according to claim 7, wherein the memory module includes prolonging
When module, be input to the recovery module again for the voltage magnitude of each source electrode line to be delayed after a period of time.
12. the voltage-operated device of touch display panel according to any one of claims 7-11, wherein the touch
Display panel includes optical touch display panel, electric resistance type touch control display panel, electromagnetic touch-control display panel, sound wave type
Any one in touch-control display panel and capacitance type touch control display panel.
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| CN201810681146.5A CN108922468A (en) | 2018-06-27 | 2018-06-27 | The voltage control method and control device of touch display panel |
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| CN201810681146.5A CN108922468A (en) | 2018-06-27 | 2018-06-27 | The voltage control method and control device of touch display panel |
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Application publication date: 20181130 |