CN109857285A

CN109857285A - Touch display panel, touch detection circuit, display device and electronic equipment

Info

Publication number: CN109857285A
Application number: CN201910218233.1A
Authority: CN
Inventors: 王洁
Original assignee: Shenzhen Xihua Technology Co Ltd
Current assignee: Shenzhen Xihua Technology Co Ltd
Priority date: 2019-03-21
Filing date: 2019-03-21
Publication date: 2019-06-07
Anticipated expiration: 2039-03-21
Also published as: CN109857285B

Abstract

The invention discloses a kind of touch detection circuits, the touch detection circuit is used for the PMOLED panel of detection and localization electrode for detecting multiple first electrodes with the first extending direction and the first electrode two sides being arranged in and intersect with the first electrode extended line, the touch detection circuit judges coordinate of the touch location on the direction intersected with first electrode extending direction by detecting the self-capacitance size of the first electrode, the touch detection circuit judges coordinate of the touch location on first electrode extending direction by the self-capacitance size or detection detection and localization electrode of detection detection and localization electrode and the mutual capacitance size of first electrode.The invention also discloses a kind of touch display panels including touch detection circuit, display device and electronic equipment.The present invention has preferable user experience.

Description

Touch display panel, touch detection circuit, display device and electronic equipment

Technical field

The present invention relates to electronic technology field more particularly to a kind of touch display panel of better user experience, touch inspection Slowdown monitoring circuit, display device and electronic equipment.

Background technique

As technology development and people's living standard improve, including mobile phone, tablet computer, wearable digital product etc. Display equipment using increasing.

Organic Light Emitting Diode (Organic Light-Emitting Diode, OLED) display technology is that a kind of utilization has The reversible color that machine semiconductor material generates under the driving of electric current realizes the technology of display.OLED has light, thin, low function High contrast, the advantages that Flexible Displays can be achieved in consumption, therefore OLED display technology is considered as most promising new one For display technology.Classify according to driving method, OLED display technology can be divided into passive-matrix Organic Light Emitting Diode (Passive Matrix OLED, PMOLED) and active-matrix Organic Light Emitting Diode (Active Matrix OLED, AMOLED) display skill Art.Currently, PMOLED display panel is widely used in small-size electronic equipment, such as wrist-watch, player.

By can be realized touch detection and control in OLED display panel addition touch detection electrode and detection chip, lead to The display panel with touch detection and display driving is often known as touch display panel again.However, because PMOLED display surface PMOLED electrode is used as in touch detection the problem of will appear touch positioning, Zhi Neng by the reasons such as the arrangement of the electrode of plate One dimension is detected and cannot achieve two-dimensional localization, and the usage experience of user is poor.

Summary of the invention

The object of the present invention is to provide a kind of touch display panel with preferable user experience and touch detection circuit, show Showing device and electronic equipment.

One aspect of the present invention discloses a kind of touch detection circuit, and the touch detection circuit is for detecting multiple tools There is the first electrode of certain extending direction and the first electrode two sides are set and are intersected with the first electrode extended line The self-capacitance of detection and localization electrode, the touch detection circuit judge to touch by detecting the self-capacitance size of the first electrode Coordinate of the position on the direction intersected with first electrode extending direction, by detect detection and localization electrode self-capacitance size or The mutual capacitance size of detection detection and localization electrode and first electrode judges coordinate of the touch location on first electrode extending direction.

Optionally, the touch detection circuit includes amplification module, analog-digital converter and processor, and the amplification module connects It receives the charge variation of the self-capacitance of the first electrode and detection and localization electrode and exports the corresponding touch detection voltage amplified and arrive The analog-digital converter, the analog-digital converter according to the touch detection voltage signal output digit signals of simulation to processor, The processor obtains the result of touch detection after carrying out signal processing.

Optionally, the self-capacitance of the first electrode and detection and localization electrode is touch detection capacitor, the amplification module Including first switch, second switch, resistance, third switch, amplification capacitor and amplifier, a high level voltage passes through described the One switch connects one end of the touch detection capacitor, the touch detection capacitor other end ground connection, the touch detection capacitor The one end for connecting the first switch also passes through the second switch, resistance is connected to the electrode input end of amplifier, described to put The output end of big device passes through amplification capacitance connection to the electrode input end of the amplifier, and the negative input of the amplifier connects Ground, the third switch and the amplification capacitor both ends are simultaneously connected between the output end and electrode input end of the amplifier.

Optionally, the touch detection circuit includes amplification module, analog-digital converter, processor, multiplexer, control Unit, charging module, first switch and the second switch, the multiplexer include for can be used in signal and outputting and inputting One input/output terminal and the second input/output terminal.The multiple first electrode connects the multichannel with two detection and localization electrodes First input/output terminal of multiplexer, the charging module connect a conduction terminal of the first switch, the first switch Another conduction terminal connect the second input/output terminal of the multiplexer, the second input/output of the multiplexer End is further connected to the amplification module by two conduction terminals of second switch, and the amplification module connects the modulus and turns Parallel operation, the analog-digital converter connect the processor, and described control unit is connected respectively to the first switch and second and opens The control terminal of pass.

Optionally, described control unit is capable of providing square-wave pulse or string wave pulse signal to be used to control described first and open It closes with second switch on or off and the first switch and the second switch will not be simultaneously turned on or be turned off, pass through the multichannel The first electrode and two detection and localization electrodes are divided into multiple sense channels by multiplexer, and each sense channel includes multiple One electrode and/or the first detection and localization electrode and the second detection and localization electrode, each sense channel corresponding one different to put Big module.

Optionally, the touch detection circuit is existed by detecting the self-capacitance of the first electrode to detect touch location The coordinate on direction intersected with its extending direction, the touch detection circuit is by detecting described two detection and localization electrodes The mutual capacitance of self-capacitance or described two detection and localization electrodes and first electrode is to detect touch location in the first electrode Coordinate on extending direction.

Optionally, the touch detection circuit for one can timesharing carry out display driving and touch detection touch it is aobvious Show that panel, the touch detection circuit are used to detect the two-dimensional touch position on the touch display panel in the touch detection stage It sets.

One aspect of the present invention also discloses a kind of touch display panel, described including above-mentioned touch detection circuit Touch display panel includes the first electrode that multiple first directions extend, and what multiple second directions extended hands over the first electrode Folded second electrode, two detection and localization electrodes that the first electrode two sides are set and are intersected with first electrode extended line, The first electrode and second electrode can be used in display driving, and the first electrode and two detection and localization electrodes can be used in Touch detection.

Optionally, the first electrode constitutes first electrode layer, and the second electrode constitutes the second electrode lay, described two Detection and localization electrode and the first electrode are arranged in same layer or described two detection and localization electrodes and the second electrode It is arranged in same layer or described two detection and localization electrodes setting on the first electrode independent one layer, described first For detecting coordinate of the touch location on the direction intersected with its extending direction, described two detection and localization electrodes are used for electrode The coordinate at touch location both ends on the first electrode extending direction is detected, the touch display panel is that PMOLED touch is aobvious Show panel.

A kind of display device is also disclosed in one aspect of the present invention comprising above-mentioned touch detection circuit and/or touch Display panel.

One aspect of the present invention also discloses a kind of electronic equipment comprising above-mentioned display device, the electronics are set Standby is mobile phone, tablet computer, laptop, e-book, electronic watch, augmented reality/virtual reality device, human action inspection Survey device, autonomous driving vehicle, smart home device, security device, one of intelligent robot.

Compared to the prior art, touch-control display panel of the present invention includes the detection and localization electricity that first electrode two sides are arranged in Pole, the first electrode can be used in the detection and localization electrode including the first keeper electrode, the second keeper electrode Detect touch action, and the first electrode can on the direction intersected with its extending direction positioning touch location, it is described Detection and localization electrode can on first electrode extending direction positioning touch location, to realize two-dimensional touch positioning, gram The touch display panel for having taken prior art PMOLED only has the technical issues of touch detection of single direction.In addition, of the invention Touch display panel, which passes through, configures the user interface with close to the first detection and localization electrode and the second detection and localization electrode, So that user touch location and first electrode and the first detection and localization electrode or first electrode and second when carrying out touch action Detection and localization electrode generate it is overlapping, so as to by detect the first electrode and the first, second detection and localization electrode from Capacitance size determines the two-dimensional coordinate direction of touch location.Inventive touch detection circuit is used for above-mentioned touch display panel, electricity Sub- equipment includes above-mentioned touch display panel or touch detection circuit.Therefore, inventive touch display panel and touch detection electricity Road, electronic equipment have preferable user experience.

Detailed description of the invention

Fig. 1 is the schematic diagram of one embodiment of the present of invention；

Fig. 2 is the diagrammatic cross-section of embodiment illustrated in fig. 1；

Fig. 3 is the circuitry block schematic diagram of embodiment illustrated in fig. 1；

Fig. 4 is the part signal schematic diagram of embodiment illustrated in fig. 1；

Fig. 5 is the touch detection area schematic of one embodiment of the present of invention；

Fig. 6 is the touch detection circuit schematic diagram of one embodiment of the present of invention；

Fig. 7 is the circuit diagram of one embodiment of the present of invention

Fig. 8 is the diagrammatic cross-section of one embodiment of the present of invention；

Fig. 9 is the diagrammatic cross-section of one embodiment of the present of invention；

Figure 10 is the diagrammatic cross-section of one embodiment of the present of invention；

Figure 11 is the circuitry block schematic diagram of one embodiment of the present of invention；

Figure 12 is the circuitry block schematic diagram of one embodiment of the present of invention；

Figure 13 is the circuitry block schematic diagram of one embodiment of the present of invention.

Specific embodiment

Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other Embodiment shall fall within the protection scope of the present invention.Feature described in present specification, structure can be with any suitable sides Formula is incorporated in one or more embodiments.In the following description, many details are provided so as to fully understand Presently filed embodiment.However, one of ordinary skill in the art would recognize that, even if without one in the specific detail or more It is more, or using other structures, constituent element etc., the technical solution of the application can also be practiced.In other cases, do not show in detail Out or known features or operation are described to avoid the emphasis of fuzzy the application.

Currently, capacitance touch technology is divided into surface capacitance type and projected capacitive, and according to detection in projected capacitive Method is divided into two kinds of realization sides of self-capacitance (Self-Capacitance) and mutual capacitance type (Mutual Capacitance) again Formula.Laterally and longitudinally staggered electrod-array is produced with a kind of transparent conductive material in glass baseplate surface, these Transverse electrode and longitudinal electrode just constitute capacitor with ground respectively.And this capacitor is usually said self-capacitance, that is, electricity The capacitor of pole over the ground.Display panel with touch detection function, which is called, does touch display panel or touch screen.

For self-capacitance touch display panel, when the touch detection region of the non-contact surface plate of human body, each self-capacitance electricity The capacitor that pole is born is a fixed value, and when human body touches screen, the capacitor that corresponding self-capacitance electrode is born is to fix Value superposition body capacitance, the capacitance variation by detecting each self-capacitance electrode may determine that touch location.Basic principle is just It is the charge-discharge circuit being constantly charged and discharged.If with finger or other object touch panels region, Jiu Huigai Become touch area counter electrode self-capacitance size, causes charge and discharge charge to change, the corresponding output voltage of amplifier also can Variation.By calculating the variation of charge and discharge charge or output voltage, to realize touch detection function.

In one embodiment of the present of invention, a kind of touch display panel includes first electrode layer, with the first electrode layer The second electrode lay being oppositely arranged, and the luminescent layer being arranged between the first electrode layer and the second electrode lay.Described One electrode layer includes multiple first electrodes being extended according to first direction, and the second electrode lay includes multiple according to second The extended second electrode in direction.Can also be arranged in the first electrode layer one for protection glass cover-plate or glass Substrate.

In the present embodiment, the first electrode and second electrode are strip shaped electric poles, the first direction and second direction phase It is mutually vertical.The luminescent layer is organic electroluminescence layer (electroluminescent layer, EL layer), is there is electricity Stream shines when flowing through the luminescent layer.Each of the first electrode and second electrode, which overlap place, can regard a pixel as, By providing electric current to the first electrode and second electrode, the first electrode and second electrode can be flowed a current through to seek Location and activation pixel.The touch display panel can excite the luminescent layer at different locations, so that the luminescent layer It shines or does not shine in the pixel of different location.

In the present embodiment, the first electrode layer and the second electrode lay be can be used with preferable electric conductivity and translucency Material be made, for example, the transparent conductive oxides such as indium tin oxide (Indium Tin Oxides, ITO).First electricity Pole layer and the second electrode lay can also have the multilayered structures such as the composite layer of ITO/Ag/ITO.Certainly, other changes of the invention In embodiment, the first electrode layer and the second electrode lay can also be also made using opaque conductive material, and the present invention does not make Limitation.

In the present embodiment, the first electrode can be anode, and second electrode can be cathode, and the luminescent layer can be OLED luminescent layer, the touch display panel can be PMOLED touch display panel or PMOLED with touch control function Display panel.Certainly, the present invention is not limited thereto, and in the other embodiment of the present invention, the touch display panel can be Any LED based touch display panel that any organic or inorganic electroluminescent material is realized.

The touch display panel connection display driver chip and touch detection chip, the display driver chip and touch Detection chip can be independent two chips, be also possible to be integrated in a chip, such as be driven by touch-control and display It is a chip that device, which integrates (Touch and Display Driver Integration, TDDI) Integration ofTechnology,.The display Driving chip and touch detection chip sometimes can be described as display driver circuit and touch detection circuit.

The display driver circuit includes scan drive circuit and data drive circuit, the scan drive circuit be used for by Row scans the multiple second electrode, needed for the data drive circuit is used for while shining to the offer of the multiple first electrode Electric current.In a frame picture display times, the multiple second electrode only has one and be short-circuited in the same time is connected to ground connection End, other second electrodes and ground terminal disconnect and are provided the common voltage (Vcom) of a high level at this time；It is the multiple First electrode is simultaneously provided electric current, so that electric current flows through the second electrode of the first electrode and ground connection, so that luminescent layer exists Pixel can shine at the first electrode of the corresponding ground connection.Second electrode line by line repeats the above process, until All second electrodes have been scanned, and just complete the display of a frame picture.Such as, but not limited to, the touch display panel tool There is the refresh rate of 100Hz, then each frame picture should complete the scanning of second electrode in 10ms.The first electrode again may be used Referred to as column electrode or SEG electrode, the second electrode can be described as row electrode or COM electrode again, and the scan drive circuit again may be used Referred to as horizontal drive circuit, the data drive circuit can be described as column drive circuit again.In some change embodiments of the invention, institute First electrode COM electrode is stated, second electrode is SEG electrode.The ground terminal can be the earth ground terminal, equipment ground end, or Other ground terminals for defining as needed of person, should broadly understood in the present invention, be not specifically limited to this.

In the present embodiment, in order to realize that touch detection function, the first electrode of the touch display panel can be multiplexed with Touch detection electrode, the self-capacitance that the touch detection circuit being connect by one with first electrode detects the first electrode become Change, be able to detect that the position that external object (such as: finger) touches on the touch display panel, to realize touch inspection It surveys.When carrying out touch detection, if the finger of user touches the glass cover-plate of the neighbouring first electrode, because of people Body itself electrification, forms parasitic capacitance between finger and the first electrode, first electrode corresponding with finger touch range Self-capacitance increases.Self-capacitance changes the charge and discharge charge variation for leading to touch detection circuit, and processor can be according to charge and discharge The quantity of electric charge calculates self-capacitance size, or calculates self-capacitance size according to pulse voltage value.The touch detection circuit passes through inspection The pulse signal voltage changing value or charge and discharge charge variation amount in first electrode are surveyed, can determine that corresponding self-capacitance is become The first electrode of change, so as to determine the position touched.That is, being able to confirm that the touch position of finger by first electrode Set on the direction that the extending direction of the first electrode intersects vertically or out of plumb intersects position or coordinate.

Certainly, in change embodiment of the invention, it is also possible to the second electrode and is multiplexed with touch detection electrode.

In order to be able to confirm that position of the finger touch position on the extending direction of the first electrode, institute when touch detection Stating touch display panel can also include multiple detection and localization electrodes, and the multiple detection and localization electrode is strip shaped electric poles, have The inconsistent extending direction with the extending direction of the first electrode.Such as, but not limited to: the extension of the detection and localization electrode Extending direction of the direction perpendicular to the first electrode.Since the extended direction of first electrode is first direction, the second electricity The extended direction of pole is second direction, when second direction is perpendicular to first direction, then the detection and localization electricity at this time The extending direction of pole is consistent with second direction.The detection and localization electrode is only used for touch detection rather than display driving, It can be used in detecting touch location position on first electrode extending direction of the finger on glass cover-plate.The detection and localization Electrode connects the touch detection circuit, can connect the scan drive circuit or be not connected to the scan drive circuit.Institute Stating detection and localization electrode can be arranged with the first electrode layer in same layer, or is arranged by insulating layer in the first electrode On layer, or with the second electrode lay setting in same layer.

The multiple first electrode and multiple second electrodes, which overlap, forms a grid distribution, the first electrode and second The overlapping place of electrode is considered as a pixel, and the multiple pixel constitutes the display area of the touch display panel, Therefore alternatively the first electrode and second electrode together constitute the display area of the touch display panel.It is same in this When, the first electrode is also multiplexed with touch detection electrode, therefore the multiple first electrode and positioning inspection in touch detection Survey the touch detection region that electrode collectively forms the touch display panel.

In the present embodiment, the multiple detection and localization electrode includes the setting vertical with the first electrode in first electrode The the first detection and localization electrode and the second detection and localization electrode of layer two sides.The first detection and localization electrode and the second detection and localization Electrode and the intersection of the extended line of the first electrode or first electrode.

In the present embodiment, the touch detection and display driving are that timesharing carries out, it may be assumed that a moment, the touch Display panel perhaps in the display stage or is in the touch detection stage, without carrying out display driving simultaneously and touching inspection It surveys.For example, the touch detection circuit each frame image display after to the self-capacitance of the first electrode change into Row detection.Therefore, the first electrode and second electrode can be used in display driving, the first electrode and two detection and localizations Electrode can be used in touch detection, and the first electrode can be used in detecting touch location in the direction intersected with its extending direction On coordinate, described two detection and localization electrodes can be used in detecting seat of the touch location on the first electrode extending direction It marks, can be used in the coordinate for detecting touch location both ends on the first electrode extending direction in above-described embodiment.

It should be noted that description of the invention be likely to occur other for describe first electrode, etc. for touch detection Word, such as, but not limited to: touch detection electrode or self-capacitance detecting electrode or detecting electrode etc., those skilled in the art It will be appreciated that for equivalent first electrode of the invention.For convenience, first electrode and detection and localization electrode are for touching When detection, touch detection electrode may be collectively referred to herein as.In addition, " first " that occurs in description of the invention, " second ", " row ", Words such as " column " are used for the purpose of facilitating the description of understanding, do not represent any specific restriction.

Touch display panel of the present invention is the PMOLED display panel with touch detection function, when light beam is from OLED When one side of substrate is emitted, the PMOLED display panel is bottom light emitting-type display panel；When light beam is emitted from far from one side of substrate When, the PMOLED display panel is top light emitting-type display panel；When light beam is simultaneously from the one side of substrate OLED and far from substrate When side is emitted, the PMOLED display panel is dual-side luminescent type display panel.

In addition, it should be noted that, although the embodiment of the present application is all schematically described with touch display panel, Inventive touch display panel can also be used for not needing in the other embodiments that image is shown, such as laptop Touch tablet (Touch Pad), the first electrode layer and the second electrode lay do not need transparent at this time, the glass substrate for protection It can be replaced with other materials.

Referring to Fig. 1, a touch display panel includes what multiple first directions extended in one embodiment of the present of invention The with the overlapping setting of first electrode 12 that first electrode layer (not labeled) that first electrode 12 is constituted, multiple second directions extend The second electrode lay (not labeled) of the relatively described first electrode layer that two electrodes 14 are constituted, setting are in the first electrode layer and the Luminescent layer 13 between two electrode layers, the glass cover-plate 11 being arranged in the first electrode layer and it is arranged described first 12 two sides of electrode and the first detection and localization electrode 101 to intersect vertically with the extended line of the first electrode 12 or first electrode 12 With the second detection and localization electrode 102.The first electrode 12 and second electrode 14 are not directly coupled, but are overlapping and are set It sets.In the present embodiment, such as, but not limited to, the first electrode 12 is parallel to each other, the second electrode 14 be parallel to each other and with The second electrode 12 is vertical.The first electrode layer is located above the second electrode lay.Above the glass cover-plate 11, User can be seen image and show and carry out touch control in 11 upper surface of glass cover-plate.The extended line of the first electrode 12 Extended line including the extending direction along first electrode 12 and along first electrode 12 extending direction opposite direction extended line.

Please refer to Fig. 2, the first detection and localization electrode 101 and the second detection and localization electrode 102 and described first Electrode 12 is arranged in same layer.In the other embodiment of the present invention, the first detection and localization electrode 101 and the second detection and localization Electrode 102, which can also be set, to be arranged with the second electrode 14 in same layer, or one layer is separately provided in the first electrode layer, The present invention is with no restriction.The luminescent layer 13 includes the electroluminescence layer that organic molecular film is constituted, such as, but not limited to: OLED Stack layer.The first electrode 12 is anode, and the second electrode 14 is cathode, 14 energy of the first electrode 12 and second electrode It is enough respectively used to provide electric current for the luminescent layer 13 and receives electric current from the luminescent layer 13.

Please refer to Fig. 3, the touch display panel further includes touch detection circuit 110,120 and of data drive circuit Scan drive circuit 130.The touch detection circuit 110 connects the first electrode 12, the first detection and localization electrode 101 and Two detection and localization electrodes 102, for detecting the first electrode 12, the first detection and localization electrode 101 and the second detection and localization electricity The self-capacitance of pole 102 changes.The data drive circuit 120 connects the first electrode 12, for the first electrode 12 Electric current is provided.The scan drive circuit 130 connects the second electrode 14, drives the second electrode for progressively scanning 14, so that the second electrode 14 of corresponding scanning is grounded, to have electricity between the second electrode 14 and first electrode 12 of corresponding scanning Stream passes through, and other not scanned second electrodes 14 then disconnect ground connection and are not turned between first electrode 12.Pass through repetition It progressively scans in this way, show that completing a frame image shows line by line.In the interim that every frame image is shown, the touch display surface Plate is in touch detection mode, and the touch detection circuit 110 is to the first electrode 12,101 and of the first detection and localization electrode Second detection and localization electrode 102 carries out touch detection, and the scan drive circuit 130 provides the common voltage of high level to described Second electrode 14, the touch detection circuit 110 make the first electrode 12, the first detection and localization electrode 101 and second fixed The self-capacitance of position detecting electrode 102 is electrically charged, discharges and detects charge and discharge quantity of electric charge signal or detection coupled voltages signal, and By being further processed to the quantity of electric charge signal or coupled voltages signal, so realization external object (as: finger) in institute State the detection of the touch action and touch location on touch display panel.

The one grid distribution of the multiple first electrode 12 and the overlapping formation of multiple second electrodes 14, the first electrode 12 It is considered as a pixel with the overlapping place of second electrode 14, the multiple pixel constitutes the aobvious of the touch display panel Show region, therefore alternatively the first electrode 12 and second electrode 14 together constitute the display of the touch display panel Region.Simultaneously, the first electrode 12 is also multiplexed with touch detection electrode, therefore the multiple first in touch detection Electrode 12 and the first detection and localization electrode 101, the second detection and localization electrode 102 collectively form the touch display panel Touch detection region.It will be apparent that user's finger will affect first electrode 12 at touch location, Yi Ji when touch detection The self-capacitance of one positioning detecting electrode 101 or the second detection and localization electrode 102, and finger size is noticeably greater than first electricity Pole 12, the first detection and localization electrode, the second detection and localization electrode 102 width, so the touch area point for touch detection The resolution ratio that resolution does not need display area is so high.Therefore, it is if can divide the first electrode 12 in touch detection Dry sense channel, each sense channel includes a certain number of first electrodes 12.It is defeated after the signal of each sense channel is in parallel Enter to the touch detection circuit 110.In the present embodiment, the touch detection circuit 110 may include amplification module, described to put Big module may include multiple being connected respectively to the first electrode, the first detection and localization electrode and the second detection and localization electrode A part of in amplifier or above-mentioned multiple electrodes can be connected to an amplifier by switch, or will be multiple on The charge and discharge quantity of electric charge signal of electrode is stated by being input to an amplifier after adder summation.

Please refer to Fig. 4, it is assumed that 14 number of second electrode of the touch display panel is n.Gl1 to gln in Fig. 4 (n is positive integer) respectively indicates the scanning signal being applied in n second electrode 14.In the display stage, the touch display surface Plate is in display drive mode, and the n second electrode 14 is successively grounded at scanning signal gl1 to gln turntable driving, so that Corresponding first electrode 12 and ground connection second electrode 14 between can electric current flow through, thus complete m frame image show.It is touching Detection-phase, the touch detection circuit 110 work.The first electrode 12 is used for touch detection, and the second electrode 14 connects To Vcom or it is connected to specific voltage and cooperates touch detection.After the touch detection stage, the touch display panel enters M+1 frame shows the stage.

In one change embodiment of the present embodiment, the first electrode 12 can be 160, and second electrode 14 can be 80, the first electrode 12 and second electrode 14 constitute the display area of 160*80, and when carrying out touch detection, 5 first Electrode 12 merges into a sense channel, therefore described 160 constitute 32 sense channels and two detection and localizations to first electrode 12 The sense channel of electrode 101,102.

Please refer to Fig. 5, the touch detection region of the touch display panel may include 8 touch key-press regions, packet First group of touch key-press region A1, A2, A3, A4 of the neighbouring first detection and localization electrode 101 are included, and neighbouring described second determines Second group of touch key-press region B1, B2, B3, B4 of position detecting electrode 102.Therefore, 8 touch key-press regions can be divided into vertical Four column for being 1,2,3,4 to two rows and lateral coordinates that coordinate is A, B.

When user touches some touch key-press region, corresponding first electrode 12 can be by the touch detection circuit 110 detect that self-capacitance changes and be able to confirm that the corresponding lateral coordinates in touch key-press region, while corresponding first positioning Detecting electrode 101 or the second detection and localization electrode 102 can be detected self-capacitance variation and energy by the touch detection circuit 110 The corresponding longitudinal coordinate in touch key-press region is enough confirmed, thus the positioning user that the touch detection circuit 110 can determine Which touch key-press region touch location is located at.Touch key-press region real area is simultaneously little, is configuring the touch The icon touched or button can will be indicated adjacent to first positioning when user interface (UI) of display panel in user interface The position of detecting electrode 101 or the second detection and localization electrode 102 setting, so that user will necessarily touch in touch operation To the first detection and localization electrode 101 or the second detection and localization electrode 102.As shown in figure 4, circular dashed line frame indicates that user's finger is real Border touch location, the expression of rectangular broken line frame can be with the user interface of touch control.Display the stage, with touch key-press region pair Close to the position of the detection and localization electrode, shown touch display panel is shown close to the first positioning inspection for the display area answered Survey the user interface in region 101 or the second detection and localization region 102.Therefore, user in touch operation actual touch position and The first detection and localization electrode 101 or the second detection and localization electrode 102 overlap, so as to cause first detection and localization The variation of the self-capacitance of electrode 101 or the second detection and localization electrode 102.

In above-described embodiment, the first detection and localization electrode 101 and the second detection and localization electrode 102 are exemplary illustration, this In invention other embodiments, the first detection and localization electrode 101 and the second detection and localization electrode 102 may be collectively referred to as positioning inspection Electrode is surveyed, quantity is also not specifically limited.

Referring to Fig. 6, the touch detection circuit 110 includes amplification module 111, analog-digital converter 112 and processor 113.Due to when carrying out touch detection, the first electrode 12 and the first detection and localization electrode 101, the second detection and localization Electrode 102 is grounded, and corresponding ground capacity is self-capacitance, referred to collectively herein as touch detection capacitor.The amplification Module 111 receives the charge variation of the touch detection capacitor and exports the corresponding touch detection voltage amplified to be turned to the modulus Parallel operation 112, the analog-digital converter 112 is according to the touch detection voltage signal output digit signals of simulation to processor 113, institute It states after processor 113 carries out signal processing and obtains the result of touch detection.

Define the electricity certainly of the first electrode 12 and the first detection and localization electrode 101, the second detection and localization electrode 102 Holding is touch detection capacitor C1.The amplification module 111 includes first switch S1, second switch S2, resistance R1, third switch S3, amplification capacitor C2 and amplifier 1111.High level voltage VDD (such as: equipment supply voltage) pass through the first switch S1 Connect one end of touch detection capacitor C1, (it is that touch detection capacitor C1 is practical to touch detection capacitor C1 other end ground connection One electrode 12 or the first detection and localization electrode 101, the parasitic capacitance of the second detection and localization electrode 102 over the ground, i.e. self-capacitance).Institute State touch detection capacitor C1 connect the first switch S1 one end also pass through the second switch S2, resistance R1 is connected to amplification The electrode input end of device 1111, the output end of the amplifier 1111 are connected to the amplifier 1111 by amplifying capacitor C2 Electrode input end.The negative input of the amplifier 1111 is grounded.The third switch S3 and the both ends the amplification capacitor C2 And it is connected between the output end and electrode input end of the amplifier 1111.1111 output end of the amplifier output amplification Touch detection voltage Vout, size are Vout=(VDD-Vcmop) * C1/C2, and wherein Vcmop indicates the amplifier 1111 Common-mode voltage.Specifically, the initial charge C1*VDD of touch detection capacitor C1 terminates charge C1*Vcmop, the touch inspection Surveying capacitor C1 and releasing the quantity of electric charge is C1*VDD-C1*Vcmop.Above-mentioned charge can be converted to the variation of 1111 output voltage of amplifier, That is C2*Vout=C1*VDD-C1*Vcmop.Therefore Vout=(VDD-Vcmop) * C1/C2.

The touch detection voltage Vout that the amplifier 1111 exports is proportional to the touch detection capacitor C1, therefore can be with The size of the touch detection capacitor C1 is detected by detecting the size of touch detection voltage Vout.Here ground connection can be Big ground terminal, equipment ground terminal are connected, or other ground terminals defined as needed.

The touch detection capacitor C1 is used to charge when the switch S2 of first switch S1 conducting and second is turned off；First It discharges when switch S1 shutdown and second switch S2 conducting, the charged moiety on the touch detection capacitor C1 is transferred to described at this time Amplify on capacitor C2.When the touch detection circuit 110 works, the first switch S1 and second switch S2 are single in a control Continuous turn-on and turn-off under first (not shown) control, and the first switch S1 and second switch S2 will not be simultaneously turned on always Or shutdown.Therefore the touch detection capacitor C1 constantly charge, discharge during produce with some cycles and frequency Pulse signal, the pulse signal is output to the analog-digital converter 112 after being amplified by the amplifier 1111, and through into one Corresponding digital signal is exported to the processor 113 after step processing.The processor 113 can be by the analog-digital converter 112 output signal storage is at array, a reference value for comparing array of values and prestoring, so that the output signal detected changes greatly Point be touch location.

The third switch S3 can be used for resetting the amplifier 1111, be normally-off state.In addition, the present embodiment It changes in embodiment, the touch detection circuit 110 can also include the filter unit or element for filtering out noise；For producing The control unit etc. of raw pulse control signal.

In one change embodiment of above-described embodiment, the touch detection circuit 110 can also be by detecting described the Between one positioning detecting electrode 101 and/or the second detection and localization electrode 102 and a specified or neighbouring first electrode 12 Touch detection is realized in mutual capacitance.Referring to Fig. 7, in a change embodiment of the invention, the first detection and localization electrode 101 There is equivalent mutual coupling capacitor Cm (i.e. mutual capacitance), the first detection and localization electrode 101 between a first electrode 12 There is field distribution between the first electrode 12.When external finger touches or close to 101 He of the first detection and localization electrode When the first electrode 12, due to having coupled capacitor, the portion that finger first electrode 12 is launched between human body and the earth Divide electric field, the received electric field of the first detection and localization electrode 101 reduces, might have a Weak current and pass through first electrode 12 flow through human body to the earth, correspondingly, may also have a Weak current and be flowed through by the first detection and localization electrode 101 Human body causes the mutual coupling capacitor Cm to change to the earth.To the variation of the capacitor C1 quantity of electric charge in similar above-described embodiment It calculates, the touch detection circuit 110 judges that described first is fixed by the quantity of electric charge variation of detection mutual coupling Cm Whether position detecting electrode 101 is touched.Likewise, the second detection and localization electrode 102 can also be by detecting itself and one Mutual coupling capacitor between first electrode 12 realizes the detection for touching positioning.

Therefore, the above embodiment of the present invention and change embodiment in, for the first detection and localization electrode 101 and second Detection and localization electrode 102 can carry out touch detection using self-capacitance mode, can also carry out touch inspection using mutual capacitance mode Survey, or using both carry out touch detection by the way of combination, with no restrictions, and field technical staff is appreciated that the present invention The all or part of deformation of above-described embodiment is combined, and replacement, extension etc. belongs to the scope of the present invention.

Referring to Fig. 8, being the schematic diagram of a change embodiment of above-described embodiment, the touch display panel and above-mentioned reality The structure and realization principle for applying touch display panel in example are essentially identical, and difference is: the first detection and localization electrode 101, Second detection and localization electrode 102 and the second electrode lay are arranged in same layer.

Referring to Fig. 9, being the schematic diagram of a change embodiment of above-described embodiment, the touch display panel and above-mentioned reality The structure and realization principle for applying touch display panel in example are essentially identical, and difference is: 101 He of the first detection and localization electrode Second detection and localization electrode 102 is arranged in the first electrode layer in independent one layer.The first detection and localization electrode at this time 101 and second detection and localization electrode 102 between glass cover-plate 11 and first electrode 12.

Referring to Fig. 10, be the schematic diagram of one of above-described embodiment change embodiment, the touch display panel with it is above-mentioned The structure and realization principle of touch display panel are essentially identical in embodiment, and difference is, further include setting in first electricity Other multiple detection and localization electrodes in independent one layer between pole layer and glass cover-plate 11.

The present invention is not limited thereto, in other embodiments of the invention, 101 He of the first detection and localization electrode Second detection and localization electrode 102 can also have other set-up modes, as long as can be realized on 12 extending direction of first electrode Touch location is detected and is positioned, the scope of the present invention is belonged to.

Please refer to Figure 11, in another embodiment of inventive touch display panel, the touch display panel includes multiple The second electrode 24 of first electrode 22, the extension of multiple second directions that first direction extends overlapped with the first electrode is set Luminescent layer (not shown) between the first electrode 22 and second electrode 24, setting are set in 22 two sides of first electrode and The the first detection and localization electrode 201 and the second detection and localization electrode 202 that intersect with 22 extended line of first electrode, with described the The data drive circuit 220 of one electrode 22 connection, the scan drive circuit 230 that is connect with the second electrode 24 and with it is described The touch detection circuit 210 of first electrode 22, the first detection and localization electrode 201 and the connection of the second detection and localization electrode 202.It is described First direction and second direction be vertical or out of plumb intersection.The touch detection circuit 210 is used in the touch display surface To the first electrode 22, the first detection and localization electrode 201, the second detection and localization electrode 202 when plate is in touch detection mode Capacitance variations detected, the touch location of (such as: finger) thus localized external object.The data drive circuit 220, For providing electric current to the first electrode 22.The scan drive circuit 230 connects the second electrode 24, for sweeping line by line Retouch the driving second electrode 24 so that the second electrode 24 of corresponding scanning is grounded, thus the second electrode 24 of corresponding scanning with Have electric current process between first electrode 22, and other not scanned second electrodes 24 then disconnect ground connection and with first electrode 22 it Between be not turned on.The luminescent layer may include the light-emitting component of the colors such as corresponding transmitting RGB, and the light-emitting component is in electric current It can electroluminescent when flowing through.By repeating above-mentioned progressive scan, showing line by line, completed when all second electrodes 24 are scanned Afterwards, one frame image of the touch display panel completion shows that the touch display panel enters touch inspection from display drive mode Survey mode.The touch detection circuit 210 is to the first electrode 22 and the first detection and localization electrode 201, the second detection and localization The self-capacitance variation of electrode 202 is detected, and the touch location of localized external object (such as: finger), the positioning include Confirm coordinate of the touch location on the extending direction of the first electrode 22 and prolonging perpendicular to the first electrode 22 Stretch the coordinate on direction.The first electrode 22 and the first detection and localization electrode 201, the second detection and localization electrode 202 are completed After touch detection, the touch display panel terminates touch detection mode, and into display drive mode, it is aobvious to continue next frame image Show.In fact, the first electrode 22 in touch detection as touch detection electrode, when showing driving as display driving Electrode.

The scan drive circuit 230 includes that generation circuit of scanning signals 231, switching circuit 233 and common voltage generate Circuit 232.The generation circuit of scanning signals 231 connects the switching circuit 232.The public voltage generating circuit 232 is logical It crosses the switching circuit 232 and is connected to the second electrode 24.The switching circuit 233 includes multiple switch (not labeled), institute State switch and can be include a control terminal and two conduction terminals trigistor (such as: field effect transistor).It is described Generation circuit of scanning signals 231 connects the control terminal of the multiple switch, for generating and exporting scanning signal to the switch, Switch on or off under scanning signal control.The public voltage generating circuit 232 connects the multiple open Another conduction terminal of the conduction terminal closed, the multiple switch connects the second electrode 24.The common voltage generates electricity Road 232 provides in switch conduction the common voltage to described the be correspondingly connected with for generating common voltage (Vcom) Two electrodes 24.The second electrode 24 ground connection in the switch OFF being correspondingly connected with.The generation circuit of scanning signals 231 is line by line The multiple switch is turned off, so that the second electrode 24 is grounded line by line.Also, the second electrode 24 is in synchronization Only one second electrode 24 ground connection.In the present embodiment, the common voltage is high level voltage, for example, 8~15V voltage. When the second electrode 24 is applied the common voltage, do not have between the second electrode 24 and the multiple first electrode 22 There is electric current to flow through.When the second electrode 24 ground connection, electric current is formed between the second electrode 24 and multiple first electrodes 22 Access especially corresponds to multiple first electrodes so that the luminescent layer between first electrode 22 and second electrode 24 is arranged in 22 and the luminescent layer at the overlapping place of the second electrode 24 can generate electroluminescent.The data drive circuit 22 is supplied to described The size of current of first electrode 22 can not be identical, so the difference overlapping position of corresponding different first electrodes 22 and second electrode 24 The light emission luminance for the luminescent layer set can not also be identical.

The first detection and localization electrode 201, the second detection and localization electrode 202 can be set in 22 institute of first electrode In layer, perhaps it is arranged in the 24 place layer of second electrode or be arranged in the first electrode 22 independent one layer.It is described An also settable protective layer (such as: glass cover-plate) above first electrode 22, user can be touched by touching protective layer The operation of control.

Figure 12 is please referred to, in another embodiment of inventive touch display panel comprising, what multiple first directions extended First electrode 32, the second electrode 34 of multiple second directions extension overlapped with the first electrode, setting are in first electricity Luminescent layer (not shown) between pole 32 and second electrode 34, setting 34 two sides of second electrode and with the second electrode The the first detection and localization electrode 301 and the second detection and localization electrode 302 of 34 extended line intersection are connect with the first electrode 32 Data drive circuit 320, the scan drive circuit 330 that is connect with the second electrode 34 and with the second electrode 34, The touch detection circuit 310 of first detection and localization electrode 301 and the connection of the second detection and localization electrode 302.The first direction and Second direction is vertical or out of plumb intersects.The touch detection circuit 310 is used to be in the touch display panel and touch The self-capacitance of the second electrode 34, the first detection and localization electrode 301, the second detection and localization electrode 302 is become when detection pattern Change is detected, the touch location of (such as: finger) thus localized external object.The data drive circuit 320, for institute It states first electrode 32 and electric current is provided.The scan drive circuit 330 connects the second electrode 34, for progressively scanning driving institute Second electrode 34 is stated, so that the second electrode 34 of corresponding scanning is grounded, thus the second electrode 34 and first electrode of corresponding scanning There is electric current process between 32, and other not scanned second electrodes 34 then disconnect ground connection and do not lead between first electrode 32 It is logical.The luminescent layer may include the light-emitting component of the colors such as corresponding transmitting RGB, and the light-emitting component is when electric current flows through It can electroluminescent.It is described after the completion of all second electrodes 34 are scanned by repeating above-mentioned progressive scan, showing line by line Touch display panel is completed a frame image and is shown, the touch display panel enters touch detection mode from display drive mode. The touch detection circuit 310 is to the second electrode 34 and the first detection and localization electrode 301, the second detection and localization electrode 302 Self-capacitance variation detected, and the touch location of localized external object (such as: finger), the positioning include described in confirmation Touch location is on the coordinate on the extending direction of the second electrode 34 and the extending direction perpendicular to the second electrode 34 Coordinate.Touch detection is completed to the second electrode 34 and the first detection and localization electrode 301, the second detection and localization electrode 302 Afterwards, the touch display panel terminates touch detection mode, into display drive mode, continues next frame image and shows.It is true On, the second electrode 34, as touch detection electrode, display driving electrodes is used as when showing driving in touch detection.

The scan drive circuit 330 includes that generation circuit of scanning signals 331, switching circuit 333 and common voltage generate Circuit 332.The generation circuit of scanning signals 331 connects the switching circuit 332.The public voltage generating circuit 332 is logical It crosses the switching circuit 332 and is connected to the second electrode 34.The switching circuit 333 includes multiple switch (not labeled), institute State switch and can be include a control terminal and two conduction terminals trigistor (such as: field effect transistor).It is described Generation circuit of scanning signals 331 connects the control terminal of the multiple switch, for generating and exporting scanning signal to the switch, Switch on or off under scanning signal control.The public voltage generating circuit 332 connects the multiple open Another conduction terminal of the conduction terminal closed, the multiple switch connects the second electrode 34.The common voltage generates electricity Road 332 provides the common voltage to described second be correspondingly connected in switch conduction for generating a common voltage Electrode 34.The second electrode 34 ground connection in the switch OFF being correspondingly connected with.The generation circuit of scanning signals 331 closes line by line Break the multiple switch, so that the second electrode 34 is grounded line by line.Also, the generation circuit of scanning signals 331 makes The second electrode 34 is obtained to be grounded in only one second electrode 34 of synchronization.When the second electrode 34 is applied the public affairs When common voltage, there is no electric current to flow through between the second electrode 34 and the multiple first electrode 32.When the second electrode 34 When ground connection, current path is formed between the second electrode 34 and multiple first electrodes 32, so that being arranged in first electrode Luminescent layer between 32 and second electrode 34 especially corresponds to the hair of multiple first electrodes 32 and the overlapping place of the second electrode 34 Photosphere can generate electroluminescent.The size of current that the data drive circuit 32 is supplied to the first electrode 32 can not phase Together, so the light emission luminance of the luminescent layer of the different crossover positions of corresponding different first electrodes 32 and second electrode 34 can not also It is identical.The first detection and localization electrode 301, the second detection and localization electrode 302 can be set where the first electrode 32 Layer is perhaps arranged in the 34 place layer of second electrode or be arranged in the first electrode 32 independent one layer.

Please refer to Figure 13, in another embodiment of inventive touch display panel, the touch display panel includes multiple The second electrode 44 of first electrode 42, the extension of multiple second directions that first direction extends overlapped with the first electrode is set It sets in 42 two sides of first electrode and the first detection and localization electrode 401 and second for intersecting with 42 extended line of first electrode Detection and localization electrode 402, is connect with the second electrode 44 data drive circuit 420 connecting with the first electrode 42 Scan drive circuit 430 and with the first electrode 42, the first detection and localization electrode 401 and the second detection and localization electrode 402 The touch detection circuit 410 of connection.The first direction and second direction be vertical or out of plumb intersection.The touch detection electricity Road 410 is used for when the touch display panel is in touch detection mode to the first electrode 42, the first detection and localization electricity Pole 401, the second detection and localization electrode 402 capacitance variations detected, the touch of (such as: finger) thus localized external object Position.The data drive circuit 420 is used to provide electric current to the first electrode 22.The scan drive circuit 430 connects The second electrode 44 drives the second electrode 44 for progressively scanning, so that the second electrode 44 of corresponding scanning is grounded, from And corresponding to has electric current process between the second electrode 44 of scanning and first electrode 42, and other not scanned second electrodes 44 are then It disconnects ground connection and is not turned between first electrode 42.By repeating above-mentioned progressive scan, showing line by line, when all second electricity After the completion of pole 44 is scanned, the touch display panel completes the scanning of a frame image, and the touch display panel drives from display Dynamic model formula enters touch detection mode.The touch detection circuit 410 is to the first electrode 42 and the first detection and localization electrode 401, the self-capacitance variation of the second detection and localization electrode 402 is detected, and the touch position of localized external object (such as: finger) It sets, the positioning includes the coordinate confirmed the touch location on the extending direction of the first electrode 42 and perpendicular to described Coordinate on the extending direction of first electrode 42.To the first electrode 22 and the positioning inspection of the first detection and localization electrode 401, second Survey electrode 402 complete touch detection after, the touch display panel terminates touch detection mode, into display drive mode, after Continuous next frame image is shown.In fact, the first electrode 42 in touch detection as touch detection electrode, driven in display Shi Zuowei shows driving electrodes.

The first detection and localization electrode 401, the second detection and localization electrode 402 can be set in 42 institute of first electrode In layer, perhaps it is arranged in the 44 place layer of second electrode or be arranged in the first electrode 42 independent one layer.It is described An also settable protective layer (such as: glass cover-plate) above first electrode 42, user can be touched by touching protective layer The operation of control.The present invention does not make to have to the layer position of the first detection and localization electrode 401, the setting of the second detection and localization electrode 402 Body limits.

The touch detection circuit 410 includes amplification module 411, analog-digital converter 412, processor 413, multiplexer 414, control unit 415, charging module 416, first switch K1 and second switch K2.The multiplexer 414 includes can The first input/output terminal and the second input/output terminal output and input for signal.The multiple first electrode 42, first Detection and localization electrode 401 and the second detection and localization electrode 402 connect the first input/output terminal of the multiplexer 414, institute The conduction terminal that charging module 416 connects the first switch K1 is stated, another conduction terminal of the first switch K1 connects institute The second input/output terminal of multiplexer 414 is stated, the second input/output terminal of the multiplexer 414 further passes through Two conduction terminals of second switch K2 are connected to the amplification module 411.The amplification module 412 connects the analog-digital converter 412, the analog-digital converter 412 connects the processor 413.Described control unit 415 is connected respectively to the first switch The control terminal of K1 and second switch K2.Such as, but not limited to, the first switch K1 and second switch K2 is to include one to control The trigistor at end processed and two conduction terminals, by enabling to two conductings to control terminal application high level or low level Hold on or off.

In the present embodiment, described control unit 415 is capable of providing square-wave pulse or string wave pulse signal to be used to control institute State first switch K1 and second switch K2 on or off.The first switch K1 and second switch K2 can be NMOS transistor And PMOS transistor, the control signal exported by described control unit 415 are rationally arranged, so that the first switch K1 and Two switch K2 will not be simultaneously turned on or be turned off always.The first electrode 42, first is positioned by the multiplexer 414 Detecting electrode 401 and the second detection and localization electrode 402 divide for multiple sense channels (or being channel), and each sense channel includes Multiple first electrodes 42 and/or the first detection and localization electrode 401 and the second detection and localization electrode 402, and each sense channel A corresponding different amplification module 411.The touch detection circuit course of work is described by taking a sense channel as an example below.

When the touch display panel is in touch detection mode, described control unit 415 sends pulse control signal To the first switch K1 and second switch K2.When the first switch K1 conducting and second switch K2 shutdown, the charging mould Block 416 is by the multiplexer 414 to the first electrode 42, the first detection and localization electrode 401 and the second detection and localization The touch detection capacitor charging of electrode 402, specifically, charging module 416 is to the first electrode 42 or the first for touch detection Detection and localization electrode 401, the connection of the second detection and localization electrode 402 and the parasitic capacitance (i.e. self-capacitance) constituted to itself and ground carry out Charging.When the first switch K1 shutdown and second switch K2 conducting, the touch detection capacitor is multiple by the multichannel It is discharged with device 414, charge a part on the touch detection capacitor is transferred on the capacitor in the amplification module 411.With The first switch K1 and second switch K2 be constantly turned on and off, the amplification module 411 is to touch detection electricity The pulse signal that capacity charge, electric discharge are formed carries out signal enhanced processing, and generates the capacitor output signal of corresponding amplification, the mould Number converter is by the voltage signal conversion position digital signal that amplification module exports and is output to the processor 413.The processing Device 413 carries out the localization process of touch detection according to the digital signal that analog-digital converter 412 exports.The charging module 416 can Think power module or other voltage follower circuits, and the output voltage of the charging module 416 can for 5V or 3V, 8V, 10V, 15V etc., the present invention is not especially limited.

In some change embodiments of above-described embodiment, the multiplexer 414 be can be omitted, described for touching inspection The first electrode 42 and keeper electrode 401,402 of survey can be directly connected to corresponding first switch K1 and second switch K2, Jin Erlian It is connected to charging module 416 and amplification module 411.

The present invention also provides a kind of touch detection circuit, the touch detection circuit is multiple with certain extension for detecting The first electrode in direction and the detection and localization electricity that the first electrode two sides are set and are intersected with the first electrode extended line The self-capacitance of pole, the touch detection circuit judge touch location with the by detecting the self-capacitance size of the first electrode Coordinate on the direction of one electrode extending direction intersection, the self-capacitance size by detecting detection and localization electrode judge touch location Coordinate on first electrode extending direction.The touch detection circuit includes amplification module, analog-digital converter and processor, institute State amplification module receive the first electrode and detection and localization electrode self-capacitance charge variation and export the touching of corresponding amplification Detection voltage is touched to the analog-digital converter, the analog-digital converter exports number letter according to the touch detection voltage signal of simulation Number processor is arrived, the processor obtains the result of touch detection after carrying out signal processing.

The self-capacitance of the first electrode and detection and localization electrode is touch detection capacitor, and the amplification module includes first Switch, second switch, resistance, third switch, amplification capacitor and amplifier, a high level voltage are connected by the first switch One end of the touch detection capacitor is connect, the touch detection capacitor other end is grounded, described in the touch detection capacitance connection One end of first switch also passes through the second switch, resistance is connected to the electrode input end of amplifier, the amplifier it is defeated Electrode input end of the outlet by amplification capacitance connection to the amplifier, the negative input ground connection of the amplifier are described Third switch and the amplification capacitor both ends are simultaneously connected between the output end and electrode input end of the amplifier.

The touch detection circuit includes amplification module, analog-digital converter, processor, multiplexer, control unit, fills Electric module, first switch and the second switch, the multiplexer include can be used in the first input that signal outputs and inputs/ Output end and the second input/output terminal.The multiple first electrode connects the multiplexer with two detection and localization electrodes The first input/output terminal, the charging module connects a conduction terminal of the first switch, the first switch it is another Conduction terminal connects the second input/output terminal of the multiplexer, and the second input/output terminal of the multiplexer is into one Step is connected to the amplification module by two conduction terminals of second switch, and the amplification module connects the analog-digital converter, The analog-digital converter connects the processor, and described control unit is connected respectively to the control of the first switch and the second switch End processed.

Described control unit is capable of providing square-wave pulse or string wave pulse signal to be used to control the first switch and the Two switch conductions or shutdown and the first switch and the second switch will not be simultaneously turned on or be turned off, pass through the multiplexer The first electrode and two detection and localization electrodes are divided into multiple sense channels, each sense channel includes multiple first electrodes And/or first detection and localization electrode and the second detection and localization electrode, each sense channel correspond to a different amplification module.

The present invention also provides a kind of display devices comprising above-mentioned touch detection circuit and/or touch display panel, institute Touch detection circuit is stated for detecting the touch location of the touch display panel on two-dimensional directional.

The present invention also provides a kind of electronic equipment, the electronic equipment may include any of above-described embodiment or it is combined Touch display panel, touch detection circuit or display device, the electronic equipment can be mobile phone, tablet computer, notebook electricity Brain, e-book, electronic watch, augmented reality/virtual reality device, human action detection device, autonomous driving vehicle, intelligent family Equipment, security device are occupied, intelligent robot etc. realizes the device or equipment of human-computer interaction by touching.

Compared to the prior art, touch-control display panel of the present invention includes the detection and localization electricity that first electrode two sides are arranged in Pole, the first electrode can be used in the detection and localization electrode including the first keeper electrode, the second keeper electrode Detect touch action, and the first electrode can on the direction intersected with its extending direction positioning touch location, it is described Detection and localization electrode can on first electrode extending direction positioning touch location, to realize two-dimensional touch positioning, gram The PMOLED touch display panel for having taken the prior art only has the technical issues of touch detection of single direction.In addition, of the invention Touch display panel, which passes through, configures the user interface with close to the first detection and localization electrode and the second detection and localization electrode, So that user touch location and first electrode and the first detection and localization electrode or first electrode and second when carrying out touch action Detection and localization electrode generate it is overlapping, so as to by detect the first electrode and the first, second detection and localization electrode from The size of mutual capacitance between capacitance size or the first, second detection and localization electrode and first electrode touches position to determine The two-dimensional coordinate direction set.Inventive touch detection circuit can be used in above-mentioned touch display panel, and display device and electronics are set Standby includes above-mentioned touch detection circuit or touch display panel.Therefore inventive touch display panel, touch detection circuit, display Device and electronic equipment have preferable user experience.

" length " that is likely to occur in description of the invention, " width ", "upper", "lower", "front", "rear", " back side ", " just The orientation or positional relationship of the instructions such as face ", "vertical", "horizontal", " top ", " bottom ", " inside ", " outside " is based on attached drawing Shown in orientation or positional relationship, be merely for convenience of the description embodiment of the present invention and simplify description, rather than indication or suggestion Signified device or element must have a particular orientation, be constructed and operated in a specific orientation, therefore should not be understood as to this The limitation of invention.Similar label and letter indicate similar terms in the accompanying drawings, therefore, once determined in a certain Xiang Yi attached drawing Justice does not need then that it is further defined and explained in subsequent attached drawing.Meanwhile in the description of the present invention, term " first ", " second " etc. are only used for distinguishing description, are not understood to indicate or imply relative importance.In description of the invention In, " a variety of " are meant that at least two, and the meaning of " plurality " is at least two, unless otherwise specifically defined.This hair In bright description, it is also necessary to which explanation is unless specifically defined or limited otherwise, " setting ", " installation ", " connection " should be done extensively Reason and good sense solution may be a detachable connection for example, it may be being fixedly connected, or be integrally connected；It can be mechanical connection, It can be electrical connection；It can be and be directly connected to, be also possible to be indirectly connected with by intermediary, can be inside two elements Connection.For the ordinary skill in the art, can be understood with concrete condition above-mentioned term in the present invention specifically contain Justice.

The above description is merely a specific embodiment, but scope of protection of the present invention is not limited thereto, any Those familiar with the art in the technical scope disclosed by the present invention, can easily think of the change or the replacement, and should all contain Lid is within protection scope of the present invention.Term used in claims, which should not be construed as to invent, is limited to this explanation Specific embodiment disclosed in book.Therefore, protection scope of the present invention should be based on the protection scope of the described claims.

Claims

1. a kind of touch detection circuit, which is characterized in that the touch detection circuit multiple has the first extension side for detecting To first electrode and the first electrode two sides are set and are intersected with the first electrode extended line detection and localization electrode PMOLED panel, the touch detection circuit by detect the self-capacitance size of the first electrode judge touch location with Coordinate on the direction of first electrode extending direction intersection, the electricity certainly that the touch detection circuit passes through detection detection and localization electrode The mutual capacitance size for holding size or detection detection and localization electrode and first electrode judges touch location in first electrode extending direction On coordinate.

2. touch detection circuit according to claim 1, which is characterized in that the touch detection circuit includes amplification mould Block, analog-digital converter and processor, the amplification module receive the electricity of the self-capacitance of the first electrode and detection and localization electrode Lotus changes and exports the touch detection voltage of corresponding amplification to the analog-digital converter, and the analog-digital converter is according to the touching of simulation Detectable voltage signals output digit signals are touched to processor, the processor obtains the knot of touch detection after carrying out signal processing Fruit.

3. touch detection circuit according to claim 2, which is characterized in that the first electrode and detection and localization electrode Self-capacitance is touch detection capacitor, and the amplification module includes first switch, second switch, resistance, third switch, amplification capacitor And amplifier, a high level voltage connect one end of the touch detection capacitor, the touch inspection by the first switch Capacitor other end ground connection is surveyed, one end of first switch described in the touch detection capacitance connection also passes through the second switch, electricity Resistance is connected to the electrode input end of amplifier, the output end of the amplifier by amplification capacitance connection to the amplifier just Pole input terminal, the negative input ground connection of the amplifier, the third switch and the amplification capacitor both ends are simultaneously connected in institute It states between the output end of amplifier and electrode input end.

4. touch detection circuit according to claim 1, which is characterized in that the touch detection circuit includes amplification mould Block, analog-digital converter, processor, multiplexer, control unit, charging module, first switch and the second switch, the multichannel Multiplexer includes that can be used in the first input/output terminal and the second input/output terminal that signal is output and input.The multiple One electrode and two detection and localization electrodes connect the first input/output terminal of the multiplexer, the charging module connection It is second defeated to connect the multiplexer for one conduction terminal of the first switch, another conduction terminal of the first switch Enter/output end, two conduction terminals that the second input/output terminal of the multiplexer further passes through second switch are connected to The amplification module, the amplification module connect the analog-digital converter, and the analog-digital converter connects the processor, described Control unit is connected respectively to the control terminal of the first switch and the second switch.

5. the touch detection circuit stated according to claim 4, which is characterized in that described control unit be capable of providing square-wave pulse or String wave pulse signal is to be used to control the first switch and the second switch on or off and the first switch and second is opened Pass will not simultaneously turn on or turn off, and be divided into the first electrode and two detection and localization electrodes by the multiplexer more A sense channel, each sense channel include multiple first electrodes and/or the first detection and localization electrode and the second detection and localization electricity Pole, each sense channel correspond to a different amplification module.

6. touch detection circuit according to claim 1, which is characterized in that the touch detection circuit passes through described in detection The self-capacitance of first electrode is to detect coordinate of the touch location on the direction intersected with its extending direction, the touch detection Circuit by detect described two detection and localization electrodes self-capacitance or described two detection and localization electrodes and first electrode it is mutual Capacitor is to detect coordinate of the touch location on the first electrode extending direction.

7. touch detection circuit according to claim 6, which is characterized in that the touch detection circuit can for one Timesharing carries out the touch display panel of display driving and touch detection, and the touch detection circuit is used to examine in the touch detection stage Survey the two-dimensional touch location on the touch display panel.

8. a kind of touch display panel, which is characterized in that including the touch detection circuit as described in claim 1~7 is any, institute Stating touch display panel includes the first electrode that multiple first directions extend, and multiple second directions are extending with the first electrode Overlapping second electrode, the detection and localization electrode that the first electrode two sides are set and are intersected with first electrode extended line, institute It states first electrode and second electrode can be used in display driving, the first electrode and two detection and localization electrodes can be used in touching Touch detection.

9. touch display panel according to claim 8, which is characterized in that the first electrode constitutes first electrode layer, The second electrode constitutes the second electrode lay, and the detection and localization number of electrodes is two, the detection and localization electrode with it is described First electrode setting same layer perhaps described two detection and localization electrodes and the second electrode be arranged in same layer or Independent one layer on the first electrode is arranged in described two detection and localization electrodes, and the first electrode touches position for detecting The coordinate on the direction intersected with its extending direction is set, described two detection and localization electrodes are for detecting touch location described The coordinate at both ends on first electrode extending direction, the touch display panel are PMOLED touch display panel.

10. a kind of display device, which is characterized in that including claim 1~the 7 any touch detection circuit and/or power Benefit requires 8~9 any touch display panels.

11. a kind of electronic equipment, which is characterized in that including display device described in any one of claim 10, the electronic equipment is hand Machine, tablet computer, laptop, e-book, electronic watch, augmented reality/virtual reality device, human action detection dress It sets, autonomous driving vehicle, smart home device, security device, one of intelligent robot.