CN105654902A - OLED (organic LED) display panel, touch electrode driving circuit and driving method - Google Patents
OLED (organic LED) display panel, touch electrode driving circuit and driving method Download PDFInfo
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- CN105654902A CN105654902A CN201610201005.XA CN201610201005A CN105654902A CN 105654902 A CN105654902 A CN 105654902A CN 201610201005 A CN201610201005 A CN 201610201005A CN 105654902 A CN105654902 A CN 105654902A
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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
- G09G3/22—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 using controlled light sources
- G09G3/30—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 using controlled light sources using electroluminescent panels
- G09G3/32—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 using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
- G09G3/3208—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 using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
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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
- G06F3/0412—Digitisers structurally integrated in a display
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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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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/40—OLEDs integrated with touch screens
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- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Human Computer Interaction (AREA)
- Computer Hardware Design (AREA)
- Electroluminescent Light Sources (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
Abstract
The invention provides an OLED (organic LED) display panel, a touch electrode driving circuit and a driving method. The touch electrode driving circuit is used for alternately outputting a display voltage signal and a touch driving signal; the display voltage signal is a set direct-current voltage signal; the touch driving signal includes: a plurality of first and second voltage bands alternately distributed; the voltage of the first voltage bands is lower than that of the second voltage bands and greater than that of the display voltage signal, wherein the display voltage signal is used for driving a cathode in a display interval so as to control the OLED display panel to emit light for displaying; the touch driving signal is used for driving the cathode to detect touches in a touch interval. The touch electrode driving circuit prevents the OLED display panel from leaking light in the touch interval, thus ensuring image displaying effect of the OLED display panel.
Description
Technical field
The present invention relates to technical field of touch-control display, in particular, relate to a kind of OLED display panel, touch control electrode drive circuit and driving method.
Background technology
Development along with science and technology, the electronic equipment more and more with touch display function is widely used in the middle of daily life and work, bring huge facility for daily life and work, become the important tool that current people are indispensable.
It is display floater that electronic equipment realizes the critical piece of touch display function, and present stage OLED display panel is conventional a kind of display floater with touch display function. When realizing touch display function, leakage problem can be there is in touch-control sequential section, affect image display effect in existing OLED display panel.
Summary of the invention
In order to solve the problems referred to above, the invention provides a kind of OLED display panel, touch control electrode drive circuit and driving method, when timesharing drives the negative electrode of OLED display panel, it is to avoid the problem that light leak can occur in touch-control sequential section, it is ensured that image display effect.
To achieve these goals, the present invention provides following technical scheme:
A kind of touch control electrode drive circuit of OLED display panel, described OLED display panel includes: the anode being oppositely arranged and negative electrode, is arranged on the light emitting functional layer between described anode and described negative electrode; Described touch control electrode drive circuit drives signal for output display voltage signal alternately and touch-control;
Described display voltage signal is the d. c. voltage signal set;
Described touch-control drives signal to include: multiple alternatively distributed first voltage wave bands and the second voltage wave band; The voltage of described first voltage wave band is less than the voltage of described second voltage wave band, and more than the voltage of described display voltage signal;
Wherein, described display voltage signal, for driving described negative electrode in display sequential section, carries out luminescence display controlling described OLED display panel; Described touch-control drives signal for driving institute's negative electrode to carry out touch control detection in touch-control sequential section.
Present invention also offers a kind of OLED display panel, this OLED display panel includes:
The anode being oppositely arranged and negative electrode;
It is arranged on the light emitting functional layer between described anode and described negative electrode;
Touch control electrode drive circuit, described touch control electrode drive circuit, for providing display voltage signal in display sequential section for described negative electrode, provides touch-control to drive signal in touch-control sequential section for described negative electrode;
Wherein, described display voltage signal is the d. c. voltage signal set; Described touch-control drives signal to include: multiple alternatively distributed first voltage wave bands and the second voltage wave band; The voltage of described first voltage wave band is less than the voltage of described second voltage wave band, and more than the voltage of described display voltage signal.
Present invention also offers a kind of driving method, for OLED display panel, including of this driving method: display sequential section and touch-control sequential section;
In display sequential section, the negative electrode for OLED display panel provides display voltage signal, carries out luminescence display controlling OLED display panel;
In touch-control sequential section, the negative electrode for OLED display panel provides touch-control to drive signal, drives described negative electrode to carry out touch control detection;
Wherein, described display voltage signal is the d. c. voltage signal set; Described touch-control drives signal to include: multiple alternatively distributed first voltage wave bands and the second voltage wave band; The voltage of described first voltage wave band is less than the voltage of described second voltage wave band, and more than the voltage of described display voltage signal.
By foregoing description it can be seen that the negative electrode of the touch control electrode drive circuit multiplexing OLED display panel of technical solution of the present invention offer is as touch control electrode, the driving negative electrode of timesharing carries out luminescence display and touch control detection. Touch-control drives the voltage of low level the first voltage wave band of signal higher than display voltage signal, such touch-control sequential section is carried in minimum voltage on negative electrode more than the negative electrode display voltage signal when showing sequential section, avoid the conducting generation leakage current of negative electrode and anode, and then avoid OLED display panel leakage problem occurs in touch-control sequential section, it is ensured that the image display effect of OLED display panel.
The OLED display panel that technical solution of the present invention provides drives negative electrode to carry out luminescence display and touch control detection by above-mentioned touch control electrode drive circuit, avoid OLED display panel and leakage problem occurs in touch-control sequential section, it is ensured that the image display effect of OLED display panel.
The driving method that technical solution of the present invention provides is carried in minimum voltage on negative electrode more than the negative electrode display voltage signal when showing sequential section in touch-control sequential section, avoid the conducting of negative electrode and anode and produce leakage current, and then avoid OLED display panel leakage problem occurs in touch-control sequential section.
Accompanying drawing explanation
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, the accompanying drawing used required in embodiment or description of the prior art will be briefly described below, apparently, accompanying drawing in the following describes is only embodiments of the invention, for those of ordinary skill in the art, under the premise not paying creative work, it is also possible to obtain other accompanying drawing according to the accompanying drawing provided.
Fig. 1 is the structural representation of the touch control electrode drive circuit of traditional OLED display panel;
Fig. 2 is the sequential chart of touch control electrode drive circuit shown in Fig. 1;
The structural representation of the touch control electrode drive circuit of a kind of OLED display panel that Fig. 3 provides for the embodiment of the present invention;
Fig. 4 is the sequential chart of touch control electrode drive circuit shown in Fig. 3;
Fig. 5 is the touch control electrode drive circuit equivalent model mould current detecting oscillogram with the equivalent model of conventional touch electrode drive circuit of the embodiment of the present invention;
The structural representation of a kind of OLED display panel that Fig. 6 provides for the embodiment of the present invention;
Fig. 7 is the Fig. 6 sectional drawing in PP ' direction.
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 clearly and completely described, it is clear that described embodiment is only a part of embodiment of the present invention, rather than whole embodiments. Based on the embodiment in the present invention, the every other embodiment that those of ordinary skill in the art obtain under not making creative work premise, broadly fall into the scope of protection of the invention.
Reference Fig. 1 and Fig. 2, Fig. 1 are the structural representation of the touch control electrode drive circuit of common OLED display panel, and Fig. 2 is the sequential chart of touch control electrode drive circuit shown in Fig. 1. This touch control electrode drive circuit includes: shift register VSR, NAND gate 11, phase inverter 12, phase inverter 13, transmission gate 14 and transmission gate 15.
The first input end of shift register VSR and NAND gate 11 connects, and the first input end for NAND gate 11 provides shift signal VSROUT. Second input input touch scanning signals TXSIG of NAND gate 11. The outfan of NAND gate 11 is connected with the input of phase inverter 12. The outfan of phase inverter 12 controls end input with the input of phase inverter 13, the first control end of transmission gate 14 and the second of transmission gate 15 and is all connected with. The outfan of phase inverter 13 controls the first control end of end and transmission gate 15 and is connected with the second of transmission gate 14. Input input display voltage signal PVEE (cathodoluminescence current potential) of transmission gate 14. The input input voltage signal V of transmission gate 15. The outfan OUT that common node is touch control electrode drive circuit of the outfan of the outfan of transmission gate 14 and transmission gate 15. Transmission gate 14 and transmission gate 15 be all first control end be electronegative potential, second control end be high potential time conducting, second control end be electronegative potential, first control end be high potential time close.
In Fig. 1 illustrated embodiment, outfan OUT is for connecting the negative electrode of OLED display panel. Touch control electrode drive circuit is controlled by shift register VSR, when the shift signal VSROUT of shift register VSR output is high potential VGH, the signal of outfan OUT output is Tong Bu with touch scanning signals TXSIG, the signal of outfan OUT output is low-voltage is display voltage signal PVEE, and high voltage is the square pulse of voltage signal V. When the shift signal VSROUT of shift register VSR output is electronegative potential VGL, the signal of outfan OUT output is display voltage signal PVEE.
When above-mentioned touch control electrode drive circuit is for OLED display panel, OLED display panel needs to use discrete negative electrode. In the touch-control sequential section stage, the signal of outfan OUT output is to show voltage signal PVEE be electronegative potential, with the voltage signal V square-wave signal being high potential, concussion above display voltage signal PVEE, can be the same with common OLED display panel, owing to leakage current produces certain light leak during causing OLED because leakage cathode voltage is relatively low, affect image display effect.
In order to solve the problems referred to above, embodiments providing the touch control electrode drive circuit of a kind of OLED display panel, OLED display panel includes: the anode being oppositely arranged and negative electrode, arranges light emitting functional layer between the anode and the cathode.
Touch control electrode drive circuit drives signal for output display voltage signal alternately and touch-control;
Display voltage signal is the d. c. voltage signal set;
Touch-control drives signal to include: multiple alternatively distributed first voltage wave bands and the second voltage wave band; The voltage of the first voltage wave band is less than the voltage of the second voltage wave band, and more than the voltage of display voltage signal;
Wherein, display voltage signal, for driving negative electrode in display sequential section, carries out luminescence display controlling OLED display panel; Touch-control drives signal for driving institute's negative electrode to carry out touch control detection in touch-control sequential section.
Visible, the negative electrode of the touch control electrode drive circuit multiplexing OLED display panel of the embodiment of the present invention is as touch control electrode, and the driving negative electrode of timesharing carries out luminescence display and touch control detection. Touch-control drives the voltage of low level the first voltage wave band of signal higher than display voltage signal, such touch-control sequential section is carried in minimum voltage on negative electrode more than the negative electrode display voltage signal when showing sequential section, avoid OLED in OLED display panel and cause the conducting of negative electrode and anode when showing vibration above voltage signal due to cathode voltage, and then avoid OLED generation leakage current, therefore avoid OLED display panel and leakage problem occurs in touch-control sequential section, it is ensured that the image display effect of OLED display panel.
In order to make technical scheme that the embodiment of the present invention provides clearly, below in conjunction with accompanying drawing, such scheme is described in detail.
The structural representation of the touch control electrode drive circuit of a kind of OLED display panel that reference Fig. 3, Fig. 3 provide for the embodiment of the present invention, the touch control electrode drive circuit of the embodiment of the present invention includes: logic control element 21 and transmission unit 22.
Transmission unit 22 is used for inputting the first voltage signal VTP1, the second voltage signal VTP2 and display voltage signal PVEE. The voltage of the first voltage signal VTP1 is equal to the voltage of the first voltage wave band, and the voltage of the second voltage signal VTP2 is equal to the voltage of the second voltage wave band.
Logic control element 21 is used for inputting switching signal TPSW, touch scanning signals TXSIG and shift signal VSROUT, exports control signal according to switching signal TPSW, touch scanning signals TXSIG and shift signal VSROUT.
Wherein, control signal is used for controlling transmission unit 22 at display sequential section output display voltage signal PVEE; At touch-control sequential section output the first voltage signal VTP1 alternately and the second voltage signal VTP2, drive signal exporting touch-control. Transmission unit 22, at touch-control sequential section output the first voltage signal VTP1 alternately and the second voltage signal VTP2, namely exports with the first voltage signal VTP1 for electronegative potential, drives signal using the square-wave signal that the second voltage signal VTP2 is high potential as touch-control.
Optionally, control signal includes: the first control signal, the second control signal and the 3rd control signal.
Logic control element 21 includes: the first NAND gate the 211, second NAND gate the 212, the 3rd NAND gate the 213, first phase inverter the 214, second phase inverter 215 and the 3rd phase inverter 216.
The first input end of the first NAND gate 211 is used for inputting shift signal VSROUT, and its second input is used for inputting touch scanning signals TXSIG, and the input of its outfan and the first phase inverter 214 and the first input end of the 3rd NAND gate 213 connect. The outfan of the first phase inverter 214 and the first input end of the second NAND gate 212 connect.Second input input switching signal TPSW of the second NAND gate 212, the input of its outfan and the second phase inverter 215 connects. The outfan of the second phase inverter 215 exports the first control signal. Second input input switching signal TPSW of the 3rd NAND gate 213, the input of its outfan and the 3rd phase inverter 216 connects. The outfan of the 3rd phase inverter 216 exports the second control signal. Switching signal TPSW is for as the 3rd control signal.
Optionally, transmission unit is used for including: the first transmission unit, the second transmission unit and the 3rd transmission unit. First transmission unit inputs the second voltage signal VTP2, and the second transmission unit inputs the first voltage signal VTP1, the 3rd transmission unit input display voltage signal PVEE.
In touch-control sequential section, the 3rd control signal is used for controlling the 3rd transmission unit and closes, and the first control signal is for controlling the conducting state of the first transmission unit, and the second control signal is for controlling the conducting state of the second transmission unit. Wherein, the first transmission unit and the second transmission unit alternate conduction, with output the first voltage signal VTP1 alternately and the second voltage signal VTP2. In display sequential section, the 3rd control signal is used for controlling the 3rd transmission unit conducting, output display voltage signal PVEE, and the first control signal is used for controlling the first transmission unit and closes, and the second control signal is used for controlling the second transmission unit and closes.
So, can in display sequential section by outfan OUT output display voltage signal PVEE by touch control electrode drive circuit, control negative electrode and carry out luminescence display, touch-control sequential section by outfan OUT output with the first voltage signal VTP1 be electronegative potential, with the second voltage signal VTP2 square-wave signal being high potential, control negative electrode and carry out touch control detection.
Optionally, the first transmission unit includes: the 4th phase inverter 221 and the first transmission gate 222. The input of the 4th phase inverter 221 and the outfan of the second phase inverter 215 connect, so that the input of the 4th phase inverter 221 inputs the first control signal, the first control end of its outfan and the first transmission gate 222 connects. The second of first transmission gate 222 controls the outfan of end and the second phase inverter 215 and connects, so that the second control end of the first transmission gate 222 inputs the first control signal, its input inputs the second voltage signal VTP2, and its outfan is connected with the outfan OUT of touch control electrode drive circuit.
Make the first of the first transmission gate 222 control the signals reverse that end and second controls the input of end by the 4th phase inverter 221, and then allow to be controlled by the first control signal of the second phase inverter 215 output the conducting state of the first transmission unit.
Optionally, the second transmission unit includes: the 5th phase inverter 223 and the second transmission gate 224. The input of the 5th phase inverter 223 and the outfan of the 3rd phase inverter 216 connect, so that the input of the 5th phase inverter 223 inputs the second control signal, the first control end of its outfan and the second transmission gate 224 connects. The second of second transmission gate 224 controls the outfan of end and the 3rd phase inverter 216 and connects, so that the second control end of the second transmission gate 224 inputs the second control signal, its input inputs the first voltage signal VTP1, and its outfan is connected with the outfan OUT of touch control electrode drive circuit.
Make the first of the second transmission gate 224 control the signals reverse that end and second controls the input of end by the 5th phase inverter 223, and then allow to be controlled by the second control signal of the 3rd phase inverter 216 output the conducting state of the second transmission unit.
Optionally, the 3rd transmission unit includes: hex inverter 225 and the 3rd transmission gate 226. The second of input input the 3rd control signal of hex inverter 225, its outfan and the 3rd transmission gate controls end and connects. The input of hex inverter 225 and the second input of the second NAND gate 212 and the second input of the 3rd NAND gate 213 are all connected with, so that the input of hex inverter 225, the second input of the second NAND gate 212 and the second input of the 3rd NAND gate 213 are simultaneously entered switching signal TPSW. The first of 3rd transmission gate 226 controls end input the 3rd control signal, and its input input display voltage signal PVEE, its outfan is connected with the outfan OUT of touch control electrode drive circuit.
Make the first of the 3rd transmission gate 226 control the signals reverse that end and second controls the input of end by hex inverter 225, and then controlled the conducting state of the 3rd transmission unit by the 3rd control signal.
Optionally, the voltage of the second voltage wave band is the anode driving voltage when showing sequential section. Namely the second voltage signal VTP2 is that display sequential section is carried in the driving voltage on OLED display panel anode. So without independent increase signal source as described second voltage signal, to reduce the quantity of data wire, simplify circuit structure.
It should be noted that in the embodiment of the present invention, each transmission gate controls end first and is electronegative potential, second controls conducting when end is high potential, otherwise, control end first and be high potential, second control cut-off when end is electronegative potential.
It is the sequential chart of touch control electrode drive circuit shown in Fig. 3 with reference to 4, Fig. 4. In touch control electrode drive circuit described in the embodiment of the present invention, when showing sequential section T2, the output signal of outfan OUT is display voltage signal PVEE, is used for driving negative electrode to carry out luminescence display. When touch-control sequential section T1, the output signal of outfan OUT is with the first voltage signal VTP1 for electronegative potential, with the second voltage signal VTP2 square-wave signal being high potential, and then negative electrode can be driven to carry out touch control detection. And during owing to carrying out touch control detection, the square-wave signal of negative electrode input vibrates near higher current potential, the display voltage signal PVEE that negative electrode when potential minimum both is greater than luminescence display inputs, the OLED that when can avoid due to touch-control sequential section T1, negative electrode accesses in luminescence display voltage signal PVEE then OLED display panel turns on the leakage luminescence problem caused due to leakage current, it is ensured that the image display effect of OLED display panel. Existing touch scanning signals TXSIG and shift signal VSROUT can be adopted. When touch-control sequential section T1, the output signal square-wave signal frequently same with touch scanning signals TXSIG of outfan OUT. Need to increase by a switching signal TPSW, for controlling the signal output of transmission unit. Touch scanning signals TXSIG is with high level VGH for high potential, with the default low level VGL square-wave signal being electronegative potential. Touch control electrode drive circuit in the embodiment of the present invention can pass through shift register VSR provides shift signal VSROUT.
With reference to Fig. 5, Fig. 5 is the touch control electrode drive circuit equivalent model mould current detecting oscillogram with the equivalent model of conventional touch electrode drive circuit of the embodiment of the present invention, owing to 5 is known, the current curve 51 of the equivalent model of conventional touch electrode drive circuit has the leakage current of 20PA in touch control detection sequential section, and the current curve 52 of the touch control electrode drive circuit equivalent model mould of the embodiment of the present invention is 0 at touch control detection sequential section electric current, effectively prevent the problem that touch-control sequential section OLED exists generation light leak due to leakage current, ensure that the image display effect of OLED display panel.
The touch control electrode drive circuit adopting the embodiment of the present invention can drive signal at the touch-control of the output of touch-control sequential section with touch scanning signals TXSIG same frequency, shows voltage signal PVEE in display sequential section output. Display sequential section distribution overlapping with touch-control sequential section, it is achieved timesharing drives the negative electrode of OLED display panel, realizes luminescence display in display sequential section, realizes touch control detection in touch-control sequential section.
Common touch control electrode drive circuit is to show the voltage signal PVEE square-wave signal being electronegative potential at the square-wave signal that touch-control sequential section is loaded on negative electrode. Owing to OLED can be equivalent to a diode, when acting on this square wave signal function vibration above display voltage signal PVEE of negative electrode, can cause that anode generates induced voltage. After anode has induced voltage, when this square-wave signal is for display voltage signal PVEE, causes that OLED to a certain degree turns on, and then leakage problem can be caused.
And touch control electrode drive circuit of the present invention at the square-wave signal that touch-control sequential section is carried on negative electrode be electronegative potential with the first voltage square-wave signal, both it had been easy to owing to voltage induced causes that anode produces induced voltage, but the minimum voltage of this square-wave signal is more than the negative electrode display voltage signal when showing sequential section, it is to avoid the conducting of negative electrode and anode produces leakage current.
And when touch-control sequential section, the signal of touch control electrode drive circuit output is with the first voltage signal for electronegative potential, the square-wave signal being high potential with the second voltage signal, first voltage signal is more than display voltage signal, the driving voltage of the anode of OLED display panel when second voltage signal is display sequential section, so completely avoid the leakage current luminescence problem that the OLED of OLED display panel causes owing to cathode voltage is relatively low when touch-control sequential section, ensure that the image display effect of OLED display panel, impact on display image when avoiding touch-control sequential section.
Based on above-mentioned touch control electrode drive circuit embodiment, another embodiment of the present invention provides a kind of OLED display panel, the structure of this OLED display panel is as shown in Figure 6 and Figure 7, the structural representation of a kind of OLED display panel that Fig. 6 provides for the embodiment of the present invention, Fig. 7 is the Fig. 6 sectional drawing in PP ' direction.
The OLED display panel of the embodiment of the present invention includes: the anode 65 being oppositely arranged and negative electrode 64; It is arranged on the light emitting functional layer 71 between anode 65 and negative electrode 64; Touch control electrode drive circuit 63, touch control electrode drive circuit 63, for providing display voltage signal in display sequential section for negative electrode, provides touch-control to drive signal in touch-control sequential section for negative electrode. Wherein, display voltage signal is the d. c. voltage signal set; Touch-control drives signal to include: multiple alternatively distributed first voltage wave bands and the second voltage wave band; The voltage of the first voltage wave band is less than the voltage of the second voltage wave band, and more than the voltage of display voltage signal. Optionally, touch control electrode drive circuit 63 is touch control electrode drive circuit described in above-described embodiment.
This OLED display panel includes substrate 61, and substrate 61 has viewing area 611 and surrounds the rim area 612 of viewing area 611. Anode 65, negative electrode 64 and light emitting functional layer 71 are arranged on viewing area. Anode 65 is arranged on surface, viewing area, and anode 65 is the anode unit of multiple array arrangement. Light emitting functional layer 71 is arranged on anode and deviates from the surface of substrate 61 side. Negative electrode 64 is arranged on light emitting functional layer 71 and deviates from the surface of substrate 61 side.Optionally, negative electrode 64 includes multiple strip electrode arranged in parallel in the first direction. One strip electrode individually connects a touch control electrode drive circuit 63.
Optionally, OLED display panel also includes the shift register 66 of multiple cascade, and shift register 66 and touch control electrode drive circuit 63 connect one to one, for providing shift signal for touch control electrode drive circuit. Cascade connection between shift register 66 is identical with the cascade system of existing touch control electrode driving signal, and the output signal of the shift register 66 of upper level is for the input signal of the shift register 66 as next stage.
The OLED display panel that the embodiment of the present invention provides adopts the touch control electrode drive circuit of above-described embodiment, OLED negative electrode is multiplexed with touch control electrode, when touch-control sequential section, touch-control drives signal to vibrate above high potential, namely vibrate above the first voltage signal, avoid OLED due to leakage current to turn on, and then avoid the leakage problem of OLED display panel, it is ensured that the image display effect of OLED display panel.
Based on above-described embodiment, another embodiment of the present invention provides a kind of driving method, for above-mentioned OLED display panel, including of this driving method: display sequential section and touch-control sequential section;
In display sequential section, the negative electrode for OLED display panel provides display voltage signal, carries out luminescence display controlling OLED display panel.
In touch-control sequential section, the negative electrode for OLED display panel provides touch-control to drive signal, drives negative electrode to carry out touch control detection.
Wherein, display voltage signal is the d. c. voltage signal set; Touch-control drives signal to include: multiple alternatively distributed first voltage wave bands and the second voltage wave band; The voltage of the first voltage wave band is less than the voltage of the second voltage wave band, and more than the voltage of display voltage signal.
OLED negative electrode is multiplexed with touch control electrode by described driving method, when touch-control sequential section, touch-control drives signal to vibrate above high potential, namely vibrate above the first voltage signal, OLED due to leakage current is avoided to turn on, and then avoid the leakage problem of OLED display panel, it is ensured that the image display effect of OLED display panel.
Described above to the disclosed embodiments, makes professional and technical personnel in the field be capable of or uses the present invention. The multiple amendment of these embodiments be will be apparent from for those skilled in the art, and generic principles defined herein can without departing from the spirit or scope of the present invention, realize in other embodiments. Therefore, the present invention is not intended to be limited to the embodiments shown herein, and is to fit to the widest scope consistent with principles disclosed herein and features of novelty.
Claims (12)
1. a touch control electrode drive circuit for OLED display panel, described OLED display panel includes: the anode being oppositely arranged and negative electrode, is arranged on the light emitting functional layer between described anode and described negative electrode; It is characterized in that, described touch control electrode drive circuit drives signal for output display voltage signal alternately and touch-control;
Described display voltage signal is the d. c. voltage signal set;
Described touch-control drives signal to include: multiple alternatively distributed first voltage wave bands and the second voltage wave band; The voltage of described first voltage wave band is less than the voltage of described second voltage wave band, and more than the voltage of described display voltage signal;
Wherein, described display voltage signal, for driving described negative electrode in display sequential section, carries out luminescence display controlling described OLED display panel;Described touch-control drives signal for driving institute's negative electrode to carry out touch control detection in touch-control sequential section.
2. touch control electrode drive circuit according to claim 1, it is characterised in that described touch control electrode drive circuit includes: logic control element and transmission unit;
Described transmission unit is used for inputting the first voltage signal, the second voltage signal and display voltage signal; The voltage of described first voltage signal is equal to the voltage of described first voltage wave band, and the voltage of described second voltage signal is equal to the voltage of described second voltage wave band;
Described logic control element is used for inputting switching signal, touch scanning signals and shift signal, exports control signal according to described switching signal, described touch scanning signals and described shift signal;
Wherein, described control signal is used for controlling described transmission unit at the display sequential section described display voltage signal of output; At touch-control sequential section described first voltage signal of output alternately and described second voltage signal, drive signal exporting described touch-control.
3. touch control electrode drive circuit according to claim 2, it is characterised in that described control signal includes: the first control signal, the second control signal and the 3rd control signal;
Described logic control element includes: the first NAND gate, the second NAND gate, the 3rd NAND gate, the first phase inverter, the second phase inverter and the 3rd phase inverter;
The first input end of described first NAND gate is used for inputting described shift signal, and its second input is used for inputting described touch scanning signals, and its outfan is connected with the first input end of the input of described first phase inverter and described 3rd NAND gate;
The outfan of described first phase inverter is connected with the first input end of described second NAND gate;
Second input of described second NAND gate inputs described switching signal, and its outfan is connected with the input of described second phase inverter;
The outfan of described second phase inverter exports described first control signal;
Second input of described 3rd NAND gate inputs described switching signal, and its outfan is connected with the input of described 3rd phase inverter;
The outfan of described 3rd phase inverter exports described second control signal;
Described switching signal is for as described 3rd control signal.
4. touch control electrode drive circuit according to claim 3, it is characterised in that described transmission unit includes: the first transmission unit, the second transmission unit and the 3rd transmission unit;
Described first transmission unit inputs described second voltage signal, and described second transmission unit inputs described first voltage signal, and described 3rd transmission unit inputs described display voltage signal;
In described touch-control sequential section, described 3rd control signal is used for controlling described 3rd transmission unit and closes, described first control signal is for controlling the conducting state of described first transmission unit, described second control signal is for controlling the conducting state of described second transmission unit, wherein, described first transmission unit and described second transmission unit alternate conduction, with described first voltage signal of output alternately and described second voltage signal;
In described display sequential section, described 3rd control signal is used for controlling described 3rd transmission unit conducting, exporting described display voltage signal, described first control signal is used for controlling described first transmission unit and closes, and described second control signal is used for controlling described second transmission unit and closes.
5. touch control electrode drive circuit according to claim 4, it is characterised in that described first transmission unit includes: the 4th phase inverter and the first transmission gate;
The input of described 4th phase inverter inputs described first control signal, and its outfan controls end with the first of described first transmission gate and is connected;
The second of described first transmission gate controls end and inputs described first control signal, and its input inputs described second voltage signal, and its outfan is connected with the outfan of described touch control electrode drive circuit.
6. touch control electrode drive circuit according to claim 4, it is characterised in that described second transmission unit includes: the 5th phase inverter and the second transmission gate;
The input of described 5th phase inverter inputs described second control signal, and its outfan controls end with the first of described second transmission gate and is connected;
The second of described second transmission gate controls end and inputs described second control signal, and its input inputs described first voltage signal, and its outfan is connected with the outfan of described touch control electrode drive circuit.
7. touch control electrode drive circuit according to claim 4, it is characterised in that described 3rd transmission unit includes: hex inverter and the 3rd transmission gate;
The input of described hex inverter inputs described 3rd control signal, and its outfan controls end with the second of described 3rd transmission gate and is connected;
The first of described 3rd transmission gate controls end and inputs described 3rd control signal, and its input inputs described display voltage signal, and its outfan is connected with the outfan of described touch control electrode drive circuit.
8. the touch control electrode drive circuit according to any one of claim 1-7, it is characterised in that the voltage of described second voltage wave band is the described anode driving voltage when described display sequential section.
9. an OLED display panel, it is characterised in that including:
The anode being oppositely arranged and negative electrode;
It is arranged on the light emitting functional layer between described anode and described negative electrode;
Touch control electrode drive circuit, described touch control electrode drive circuit, for providing display voltage signal in display sequential section for described negative electrode, provides touch-control to drive signal in touch-control sequential section for described negative electrode;
Wherein, described display voltage signal is the d. c. voltage signal set; Described touch-control drives signal to include: multiple alternatively distributed first voltage wave bands and the second voltage wave band; The voltage of described first voltage wave band is less than the voltage of described second voltage wave band, and more than the voltage of described display voltage signal.
10. OLED display panel according to claim 9, it is characterised in that described negative electrode includes multiple strip electrode arranged in parallel in the first direction;
Strip electrode described in one individually connects touch control electrode drive circuit described in.
11. OLED display panel according to claim 10, it is characterized in that, also including the shift register of multiple cascade, described shift register and described touch control electrode drive circuit connect one to one, for providing shift signal for described touch control electrode drive circuit.
12. a driving method, for OLED display panel, it is characterised in that this driving method includes: display sequential section and touch-control sequential section;
In display sequential section, the negative electrode for OLED display panel provides display voltage signal, carries out luminescence display controlling OLED display panel;
In touch-control sequential section, the negative electrode for OLED display panel provides touch-control to drive signal, drives described negative electrode to carry out touch control detection;
Wherein, described display voltage signal is the d. c. voltage signal set; Described touch-control drives signal to include: multiple alternatively distributed first voltage wave bands and the second voltage wave band; The voltage of described first voltage wave band is less than the voltage of described second voltage wave band, and more than the voltage of described display voltage signal.
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