CN105373258A - Touch display apparatus and electronic device - Google Patents
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- CN105373258A CN105373258A CN201510876097.7A CN201510876097A CN105373258A CN 105373258 A CN105373258 A CN 105373258A CN 201510876097 A CN201510876097 A CN 201510876097A CN 105373258 A CN105373258 A CN 105373258A
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Abstract
The invention provides a touch display apparatus and an electronic device. The touch display apparatus comprises a touch display panel, a driving chip and a control chip, wherein the touch display panel comprises a plurality of first electrodes; the driving chip is connected with the touch display panel and is used for providing touch sensing driving signals to the first electrodes for executing self-capacitance touch sensing; and the control chip is connected with the driving chip and is used for providing modulation signals to the driving chip, the modulation signals are used for modulating input signals provided to the touch display panel by the driving chip when the touch display panel is driven to execute touch sensing, and the input signals include the touch sensing driving signals.
Description
Technical field
The present invention relates to and touch display technique field, particularly relate to a kind of touch display unit and electronic equipment.
Background technology
At present, touch-screen is used on various electronic product gradually, becomes user and the mutual important intermediary interface equipment of electronic product.So, the touch-sensing signal of the touch-screen of existing electronic product is easily affected by noise, thus causes touch-sensing precision not high.
Summary of the invention
The technical matters that the present invention solves is to provide the higher touch display unit of a kind of touch-sensing precision and electronic equipment.
Correspondingly, the invention provides a kind of touch display unit, comprising:
Touch display panel, comprises multiple first electrode;
Driving chip, is connected with described touch display panel, performs self-capacitance touch-sensing for providing touch-sensing drive singal to described multiple first electrode; With
Control chip, be connected with described driving chip, for providing modulation signal to described driving chip, described modulation signal for modulate described driving chip when driving described touch display panel to perform touch-sensing be supplied to the input signal of touch display panel, described input signal comprises described touch-sensing drive singal.
Alternatively, described touch-sensing drive singal raises with the rising of described modulation signal, reduces with the reduction of described modulation signal.
Alternatively, described control chip comprises modulation circuit, and described modulation circuit is for generation of described modulation signal, and described modulation signal comprises the first reference signal and the second reference signal, and wherein, described first reference signal is different from described second reference signal.
Alternatively, the voltage of described first reference signal and the second reference signal can be any one in following five kinds of situations:
The voltage of the first: the first reference signal is positive voltage, and the voltage of the second reference signal is 0 volt;
The voltage of the second: the first reference signal is 0 volt, and the voltage of the second reference signal is negative voltage;
The voltage of the three: the first reference signal is positive voltage, and the voltage of the second reference signal is negative voltage, and the absolute value of the voltage of described first reference signal equals or is not equal to the absolute value of voltage of described second reference signal;
Positive voltages different sized by the voltage of the four: the first reference signal, the second reference signal;
Negative voltages different sized by the voltage of the five: the first reference signal, the second reference signal.
Alternatively, described modulation signal is the periodically variable square-wave signal that the first reference signal and the second reference signal alternately occur.
Alternatively, signal is ground signalling one of in described first reference signal and described second reference signal, and another signal is drive singal, and described drive singal is higher than described ground signalling.
Alternatively, described first reference signal and described second reference signal are constant voltage signal.
Alternatively, described modulation circuit for be connected to described driving chip and an electronic equipment one end between, described modulation circuit is for receiving the first reference signal from electronic equipment, described control chip comprises voltage generation circuit further, described voltage generation circuit is connected with described modulation circuit, for providing the second reference signal to described modulation circuit.
Alternatively, described modulation circuit is equipment ground for connecting one end of electronic equipment, and receive from the ground signalling that exports of equipment ground, described first reference signal is ground signalling; Or described modulation circuit is power supply end for connecting one end of electronic equipment, receive the power supply voltage exported from power supply end, described first reference signal is power supply voltage; Or described modulation circuit is reference power source end for connecting one end of electronic equipment, receive the reference voltage exported from reference power source end, described first reference signal is reference voltage.
Alternatively, described power supply voltage is higher than described ground signalling, therebetween pressure reduction remains unchanged, the height of described reference voltage between described ground signalling and the height of described power supply voltage, and and pressure reduction between described ground signalling remain unchanged.
Alternatively, described control chip comprises slope controller further, described slope controller for control described modulation circuit produce the slope of modulation signal.
Alternatively, described driving chip is further used for providing gray scale voltage to perform image display refreshing to described multiple first electrode.
Alternatively, the stage defining the first electrode execution image display refreshing is the image display refreshing stage, the stage defining the first electrode execution touch-sensing is the touch-sensing stage, described touch-sensing stage and described image show the timesharing of refreshing stage to carry out, described modulation circuit is connected with described driving chip, in the touch-sensing stage, described modulation circuit exports modulation signal to described driving chip; In the image display refreshing stage, described modulation circuit exports constant voltage signal to described driving chip.
Alternatively, described modulation signal is the voltage reference of described driving chip when the touch-sensing stage works, and described constant voltage signal is the voltage reference of described driving chip when image display refreshing stage work.
Alternatively, described modulation circuit is connected with described touch display panel further, and in the touch-sensing stage, described modulation circuit exports modulation signal to described touch display panel; In the image display refreshing stage, described modulation circuit exports constant voltage signal to described touch display panel.
Alternatively, described modulation signal is the voltage reference of described touch display panel when the touch-sensing stage works, and described constant voltage signal is the voltage reference of described touch display panel when image display refreshing stage work.
Alternatively, described touch display panel comprises the second electrode, and described second electrode is used for forming electric field between described multiple first electrode, shows image to drive touch display panel.
Alternatively, described driving chip comprises public voltage generating circuit, described public voltage generating circuit and described second Electrode connection, for providing common electric voltage to the second electrode.
Alternatively, the common electric voltage that described public voltage generating circuit is supplied to the second electrode in the image display refreshing stage is different from the common electric voltage being supplied to the second electrode in the touch-sensing stage, wherein, in the touch-sensing stage, the pressure reduction that described public voltage generating circuit is supplied between the common electric voltage of the second electrode and touch-sensing drive singal remains unchanged.
Alternatively, described touch display panel comprises further:
Multi-strip scanning line;
A plurality of data lines, insulate arranged in a crossed manner with described multi-strip scanning line;
Multiple gauge tap, for being connected respectively with described multi-strip scanning line and a plurality of data lines, wherein, each gauge tap comprises control electrode, the first transmission electrode and the second transmission electrode, wherein, control electrode is connected with sweep trace, and the first transmission electrode is connected with data line, the second transmission electrode and the first Electrode connection.
Alternatively, described touch display unit comprises further:
Touch-sensing control circuit, for providing touch-sensing control signal to sweep trace, activates the gauge tap that is connected with sweep trace, described touch-sensing control circuit or be formed on described touch display panel, or is formed in described driving chip;
Described driving chip exports touch-sensing drive singal to the first electrode by the gauge tap of data line and activation, and wherein, the pressure reduction between described touch-sensing control signal and described touch-sensing drive singal remains unchanged.
Alternatively, described touch display unit comprises further:
Scan drive circuit, for providing sweep signal to sweep trace, activates the gauge tap that is connected with sweep trace, described scan drive circuit or be formed on described touch display panel, or is formed in described driving chip;
Described driving chip comprises further:
Data drive circuit, for exporting gray scale voltage to the first electrode by the gauge tap of data line and activation.
Preferably, described driving chip comprises further:
Secondary signal treatment circuit, for generation of described touch-sensing drive singal; With
Touch-sensing detecting unit, is connected with described secondary signal treatment circuit and data line, for receiving the touch-sensing drive singal that described secondary signal treatment circuit exports, and transmits described touch-sensing drive singal to described data line.
Alternatively, in the touch-sensing stage, described touch-sensing detecting unit is further used for receiving the touch-sensing detection signal exported from the first electrode.
Alternatively, described touch-sensing detecting unit comprises the first operational amplifier, feedback capacity and the 4th switch; Described first operational amplifier comprises in-phase end, end of oppisite phase and output terminal, described feedback capacity and the 4th switch and is connected between described output terminal and end of oppisite phase, described in-phase end is connected with described secondary signal treatment circuit, described output terminal is connected with described control chip, described end of oppisite phase is connected with described data line further, and described end of oppisite phase is for transmitting touch-sensing drive singal and touch-sensing detection signal.
Alternatively, described driving chip comprises further:
Analog to digital signal conversion unit, is connected with the output terminal of described first operational amplifier, carries out analog to digital conversion for the signal exported described first operational amplifier.
Alternatively, described control chip comprises level conversion unit and computing unit further, described level conversion unit is connected between described computing unit and described analog to digital signal conversion unit, the digital signal that described level conversion unit is used for described analog to digital signal conversion unit exports carries out level conversion, and the digital signal after output level conversion is to computing unit, described computing unit calculates according to the digital signal after level conversion the position that described touch display panel is touched.
Alternatively, described driving chip comprises control circuit further, described control circuit is connected respectively with public voltage generating circuit, scan drive circuit, data drive circuit, touch-sensing control circuit and touch-sensing detecting unit, for controlling public voltage generating circuit, scan drive circuit, data drive circuit, touch-sensing control circuit and the work of touch-sensing detecting unit.
Alternatively, described control chip comprises Graphics Processing circuit and level conversion unit further, described level conversion unit is connected between described Graphics Processing circuit and described control circuit, described Graphics Processing circuit is for receiving the display data from a main control chip, described display data are processed, and the display data after output processing are to level conversion unit, described level conversion unit carries out level conversion to the display data received, and the display data after output level conversion are to control circuit.
Alternatively, described control circuit exports corresponding display data to data drive circuit, and output timing signal is to scan drive circuit, described scan drive circuit activates corresponding sweep trace according to the clock signal received, described data drive circuit conversion receiver to display data be corresponding gray scale voltage, and export gray scale voltage give corresponding first electrode.
Alternatively, described Graphics Processing circuit stores the display data received, decompresses and color conversion process.
Alternatively, described touch display unit comprises selection circuit further, described selection circuit is connected respectively with described touch-sensing control circuit and described scan drive circuit, and be connected with sweep trace further, for selecting to be export touch-sensing control signal or sweep signal to sweep trace, described selection circuit or be formed on touch display panel, or be formed in described driving chip.
Alternatively, described touch display unit comprises further:
First switch element, be arranged between data drive circuit and data line, described first switch element comprises multiple first switch, described multiple first switch and described multi-strip scanning line connect one to one, described first switch element or be formed on touch display panel, or be formed in described driving chip; With
Second switch unit, be arranged between data drive circuit and data line, described second switch unit comprises multiple second switch, described multiple second switch and described multi-strip scanning line connect one to one, described second switch unit or be formed on touch display panel, or be formed in described driving chip.
Alternatively, described touch display unit comprises further:
3rd switch, 3rd switch connects and touch-sensing detecting unit connects one to one, described 3rd switch is connected with data line further by second switch, wherein, at least one 3rd switch connects at least two second switches, 3rd switch or be formed on touch display panel, or be formed in described driving chip.
Alternatively, described modulation circuit comprises control module, the first active switch and the second active switch; First active switch comprises control electrode, the first transmission electrode and the second transmission electrode; Second active switch comprises control electrode, the first transmission electrode and the second transmission electrode; Wherein, the control electrode of the first active switch is connected described control module with the control electrode of the second active switch; First transmission electrode of described first active switch receives the first reference signal, second transmission electrode of described first active switch connects the first transmission electrode of described second active switch, and the second transmission electrode of described second active switch receives the second reference signal; Define a node between second transmission electrode of described first active switch and the first transmission electrode of described second active switch, by controlling the first Switching Power Supply and second switch power supply, to come corresponding be export described first reference signal or the second reference signal at described node to described control module.
Alternatively, described control chip comprises the second earth terminal, and described second earth terminal is connected with the equipment ground of an electronic equipment, receives the ground signalling from equipment, first transmission electrode of described first active switch connects described second earth terminal, and described first reference signal is described ground signalling.
Alternatively, described driving chip comprises the first earth terminal, and described node connects described first earth terminal.
Alternatively, described touch display panel comprises ground wire, and described ground wire connects described node.
Alternatively, described driving chip is further used for providing gray scale voltage to perform image display refreshing to described multiple first electrode; The stage defining the first electrode execution image display refreshing is the image display refreshing stage, and the stage defining the first electrode execution touch-sensing is the touch-sensing stage, and described touch-sensing stage and described image show the timesharing of refreshing stage to carry out; In the touch-sensing stage, described modulation circuit exports modulation signal to the first earth terminal and ground wire by described node; In the image display refreshing stage, described modulation circuit exports ground signalling to described first earth terminal and ground wire by described node.
Alternatively; described control chip comprises the first power end; described first power end is for receiving supply voltage; described driving chip comprises second source end; described second source end is for receiving supply voltage; described touch display unit comprises protection circuit further; described protection circuit is arranged between described first power end and second source end, for disconnecting the connection between the first power end and second source end when the supply voltage of described second source end is greater than the supply voltage of described first power end.
Alternatively, described protection circuit comprises diode, first electric capacity, with the second electric capacity, wherein, the anode of described diode is connected with the first power end, the negative electrode of described diode is connected with described second source end, one end of described first electric capacity is connected between the anode of described diode and the first power end, the other end of described first electric capacity is connected between the second earth terminal and described modulation circuit, one end of described second electric capacity is connected between the negative electrode of described diode and second source end, the other end of described second electric capacity is connected between the first earth terminal and described modulation circuit.
Alternatively, described protection circuit comprises control module, the 3rd active switch, the first electric capacity and the second electric capacity; Described 3rd active switch comprises control electrode, the first transmission electrode and the second transmission electrode; The control electrode of described 3rd active switch is connected with the control module of protection circuit, and the first transmission electrode of the 3rd active switch is connected with described first power end, and the second transmission electrode of the 3rd active switch is connected with described second source end; Between the first transmission electrode that one end of described first electric capacity is connected to described 3rd active switch and the first power end, the other end of described first electric capacity is connected between the second earth terminal and described modulation circuit; Between the second transmission electrode that one end of described second electric capacity is connected to described 3rd active switch and second source end, the other end of described second electric capacity is connected between the first earth terminal and described modulation circuit.
Alternatively, the minimal characteristic live width of described control chip is less than the minimal characteristic live width of described driving chip.
The present invention also provides a kind of electronic equipment, described electronic equipment be above-mentioned in arbitrarily described touch display unit.
The present invention also provides a kind of electronic equipment, described electronic equipment be above-mentioned in arbitrarily described touch display unit, described electronic equipment comprises main control chip further, described main control chip is used for providing display data to described control chip, and described control chip is used between described main control chip and described driving chip, carry out the transmission and the process that show data.
Alternatively, the instantaneous velocity that the instantaneous velocity that described control chip transmits display data toward described driving chip transmits display data than main control chip toward described control chip is slow.
Alternatively, described main control chip comprises the output interface be connected with control chip, described control chip comprises the output interface be connected with driving chip, and wherein, the pin number of the output interface of described main control chip is less than the pin number of the output interface of described control chip.
Alternatively, described main control chip is also for powering for described touch display unit, and described driving chip is converted to gray scale voltage according to described display data.
Because described touch display unit adopts modulation signal to carry out overall uniform modulation to the input signal that driving chip exports to touch display panel, thus can signal to noise ratio (S/N ratio) be improved, and then improve touch-sensing precision.Correspondingly, the touch-sensing precision with the electronic equipment of described touch display unit is higher, more human nature words.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of electronic equipment one embodiment of the present invention.
Fig. 2 is the schematic diagram of the embodiment of touch display unit one shown in Fig. 1.
Fig. 3 is the electrical block diagram of the another embodiment of inventive touch display device.
Fig. 4 is the dot structure schematic diagram of existing low temperature polycrystalline silicon display panel.
Fig. 5 is the dot structure schematic diagram of an embodiment of inventive touch display panel.
Fig. 6 is the structural representation of the another embodiment of touch display panel.
Fig. 7 is the part enlarged plan view of the second electrode and the first electrode shown in Fig. 6.
Fig. 8 is the cut-away section structural representation of the another embodiment of touch display panel shown in Fig. 6.
Fig. 9 is the part enlarged plan view of the second electrode and the first electrode shown in Fig. 8.
Figure 10 is the structural representation after the assembling of touch display panel shown in Fig. 6.
Figure 11 is the structural representation of the testing circuit of touch-sensing shown in Fig. 3.
The structural representation of the embodiment that Figure 12 is the detecting unit of touch-sensing shown in Figure 11 and processing unit.
Figure 13 is the part circuit structure schematic diagram of touch display unit one embodiment.
Figure 14 is the part circuit structure schematic diagram of another embodiment of touch display unit.
Figure 15 is the structural representation of the another embodiment of electronic equipment of the present invention.
The schematic diagram of the embodiment that Figure 16 is modulation circuit shown in Figure 15.
Figure 17 is electronic equipment when only adopting to take GND as the territory of benchmark, the electrical block diagram of an embodiment of described secondary signal treatment circuit.
During two territories that Figure 18 is electronic equipment employing is benchmark with GND and MGND, the electrical block diagram of an embodiment of described secondary signal treatment circuit.
Figure 19 is the circuit diagram of protection circuit.
Figure 20 is the structural representation of another embodiment of protection circuit.
Figure 21 is the structural representation of another embodiment of self-capacitance touch screen.
Figure 22 is the structural representation of public voltage generating circuit.
Figure 23 is the annexation figure between second circuit and the second electrode.
Figure 24 is the schematic diagram of the display driver circuit shown in Figure 15.
Figure 25 is the structural representation of the another embodiment of electronic equipment of the present invention.
The part-structure schematic diagram of the another embodiment that Figure 26 is touch display panel shown in Fig. 3.
Figure 27 is the process flow diagram of the driving method of inventive touch display device.
Figure 28 is the part-structure schematic diagram of another embodiment of electronic equipment of the present invention.
Embodiment
For enabling above-mentioned purpose of the present invention, feature and advantage more become apparent, and are described in detail specific embodiments of the invention below in conjunction with accompanying drawing.But example embodiment can be implemented in a variety of forms, and should not be understood to be limited to embodiment set forth herein; On the contrary, these embodiments are provided to make the present invention comprehensively with complete, and the design of example embodiment will be conveyed to those skilled in the art all sidedly.Conveniently or clear, the thickness of every layer shown in accompanying drawing and size may be exaggerated, omit or be schematically illustrated in and the quantity of related elements is schematically shown.In addition, the size of element not exclusively reflects actual size, and the quantity of related elements not exclusively reflects actual quantity.Because reasons such as accompanying drawing vary in size, the quantity of the same or similar or related elements in different drawings exists and inconsistent situation.Reference numeral identical in the drawings represents same or similar structure.So, it should be noted that, in order to make label, there is regularity and logicality etc., in some different embodiment, same or similar element or structure have employed different Reference numerals, according to relevance and the related text explanation of technology, those skilled in the art can directly or indirectly judge to learn.
In addition, described feature, structure can be combined in one or more embodiment in any suitable manner.In the following description, provide many details thus provide fully understanding embodiments of the present invention.But one of ordinary skill in the art would recognize that, what do not have in described specific detail is one or more, or adopts other structure, constituent element etc., also can put into practice technical scheme of the present invention.In other cases, be not shown specifically or describe known features or operate to avoid fuzzy the present invention.
Further, following term is exemplary, and not intended to be limits by any way.After reading the application, those skilled in the art will recognize that, the statement of these terms is applicable to technology, method, physical component and system (no matter whether knowing at present), comprises those skilled in the art after reading the application and infers or its expansion educible.
In describing the invention, it is to be understood that " multiple " comprise two and two or more, " many " comprise more than two and two, except non-invention separately has clearly concrete restriction." at least two " comprise the multiple situations such as two, three, four, five, and " at least two " comprises the multiple situations such as two, three, four, five.In addition, words such as " first ", " second " that occur in each element title and signal name is not limit the sequencing that element or signal occur, but for convenience of element name, clearly distinguishes each element, makes to describe more succinct.
Touch-screen generally comprises the touch-screen of the several types such as resistance-type, condenser type, infrared-type, and wherein, the application of capacitive touch screen is more extensive.Capacitive touch screen comprises again mutual capacitance type touch screen and self-capacitance touch screen.
Based in the touch system of mutual capacitance, touch-screen can comprise (such as) and drive district and sensing area, such as drive wire and sense wire.In an example case, drive wire can form multirow, and sense wire can form multiple row (such as, orthogonal).Touch pixel and can be arranged at row and the point of crossing place arranged.During operation, available alternate signal (AC) waveform encourages described row, and mutual capacitance can be formed between the row of this touch pixel and row.When an object is close to this touch pixel, some electric charges be coupled between the row of this touch pixel and row can change into and being coupled on this object.This minimizing being coupled in the electric charge in this touch pixel can cause the clean minimizing of the mutual capacitance between row and row and be coupled in the minimizing of the AC waveform in this touch pixel.This minimizing of Charged Couple AC waveform can be detected by touch system and measure to judge the position of this object when touching this touch-screen.
Relatively, based in the touch system of self-capacitance, each touches pixel and can be formed by the individual electrode of the self-capacitance formed over the ground.When an object is close to this touch pixel, another ground capacitance (capacitancetoground) can be formed between this object and this touch pixel.The net increase of the self-capacitance that this another ground capacitance can cause this touch pixel to stand.This self-capacitance increase can be detected by touch system and measure to judge the position of this object when touching this touch-screen.
Obscuring in order to avoid understanding, needing predeclaredly further to have:
The first, for the first electrode in inventive touch display panel, functionally, the first electrode both can be used as the pixel electrode of image display, can be used as again the sensing electrode of touch-sensing.For the technical scheme on modulation ground, the first electrode also can be public electrode, in the following related embodiment about modulation ground, has related description to this.In addition, the first electrode is not restricted to pixel electrode or public electrode yet, can be other title but the same or analogous electrode of function yet.
The second, for the first electrode for pixel electrode, for single pixel electrode, comprise two kinds of prevailing operating state, be respectively touch-sensing state and image display status.Wherein, for image display status, be subdivided into again two kinds of main display states, be respectively image display Flushing status and image display hold mode.Described image display status is from image display Flushing status, and image display refreshes the complete image that just enters afterwards and shows hold mode, until enter touch-sensing state.
Such as, after one first electrode executes touch-sensing, provide gray scale voltage to perform image display to described first electrode and refresh, after gray scale voltage is written into the first electrode, image display refreshing completes, and correspondingly, stops providing gray scale voltage to the first electrode.Afterwards, the first electrode enters image display hold mode, until the first electrode performs touch-sensing next time.In addition, image display refreshing can comprise further and carries out precharge or pre-arcing to the first electrode, reoffer after first electrode of same a line reaches same voltage realize predetermined grey menu gray scale voltage to the first electrode.
Pointing out that image display refreshes and image shows and keeps these two kinds different display states herein, is prepare for better understanding described the embodiments of the present invention below.In addition, clearer and more definite " image display refreshes " and " image shows and keeps " are two kinds of different technological concepts.
Correspondingly, in some embodiments, when requiring that in touch display panel, any 2 first electrode non-concurrent execution images show refreshing with touch-sensing, be the situation that existence 2 first electrode performs image display maintenance and touch-sensing simultaneously.
3rd, for whole touch display unit, comprising three prevailing operating state, is touch-sensing state, image display Flushing status and vertical blanking period respectively.
Below, various embodiments of the present invention are described.
Refer to Fig. 1, Fig. 1 is the schematic diagram of electronic equipment one embodiment of the present invention.Described electronic equipment 100 is as being the various proper product such as mobile phone, panel computer, notebook computer, desktop computer, Wearable and Smart Home.The present invention is not restricted this.Described electronic equipment 100 comprises touch display unit 1.Described touch display unit 1 is for realizing image display and touch-sensing.Display device in described touch display unit 1 is such as liquid crystal indicator, that is, described touch display unit is touch liquid crystal display device.Mainly below to be described for touch liquid crystal display device.So, change ground, the display device in described touch display unit 1 also can be the display device of other suitable type, e.g., and display device of electronic paper (EPD) etc.
See also Fig. 2, Fig. 2 is the schematic diagram of the embodiment of touch display unit 1 one shown in Fig. 1.Described touch display unit 1 comprises touch display panel 10 and driving circuit 20.Described driving circuit 20 is connected with described touch display panel 10, performs image display and self-capacitance touch-sensing for driving described touch display panel 10.
Described touch display panel 10 comprises multiple show electrode 11, and described multiple show electrode 11 is for performing image display, and at least part of show electrode 11 in described multiple show electrode 11 is further used for performing self-capacitance touch-sensing.Definition is not only for performing image display but also the show electrode 11 for performing self-capacitance touch-sensing is the first electrode 101.Described driving circuit 20 performs self-capacitance touch-sensing for providing touch-sensing drive singal to the first electrode 101, also for providing gray scale voltage to perform image display to show electrode 11.
Because the first electrode 101 of touch display panel 10 is both for performing image display, again for performing self-capacitance touch-sensing, therefore, described touch display unit 1 is more lightening.
In the present embodiment, described multiple show electrode 11 arrangement in two-dimensional array type.Described multiple show electrode 11 is coplanar with layer.So, change ground, in other embodiments, described multiple show electrode 11 also can be Else Rule or non-regular arrangement.Described multiple show electrode 11 is with layer or coplanar.
A kind of mode of operation is: all show electrode 11 is not only for performing image display but also for performing self-capacitance touch-sensing.So, change ground, some show electrode 11, such as, head and the tail two row or wherein a line show electrode 11, only for perform image display or touch-sensing be also feasible, in order to more cheer and bright, for the show electrode 11 shown in Fig. 2, be positioned at the extra-regional show electrode of dotted line frame 11 for described first electrode 101, the show electrode 11 show electrode 11 of (on touch display panel 10 last column) being positioned at dotted line frame region then no matter the first electrode 101 be perform image display or when performing touch-sensing, is performing image all always and is showing.
It will be appreciated that, the above is to clearly demonstrate, figure 2 illustrates part show electrode 11 and be used as the first electrode 101, so, whole show electrodes in the touch display unit 1 that present specification is following 11 are not only for performing image display but also for performing self-capacitance touch-sensing, correspondingly, in the description of each embodiment below, all be used as the first electrode 101 for whole show electrode 11 to be described and to illustrate, but, for one of ordinary skill in the art, its various embodiments following according to present specification, easily to expect that not all show electrode 11 is used as other embodiment of the first electrode 101, in order to clear succinct, other embodiment relevant repeats no more, but the protection domain of the application all should be fallen into.In addition, afore-mentioned is suitable for the touch display unit etc. of the touch display unit 4 of aftermentioned electronic equipment 400, the touch display unit 7 of electronic equipment 700 and electronic equipment 900 too.
In the present embodiment, touch display unit 1 is described for touch liquid crystal display device, and correspondingly, described show electrode 11 is pixel electrode.The shape approximation rectangle (as shown in Figure 2) of described first electrode 101, so, is not limited to rectangle.The usual scope of the length L of each the first electrode 101 is 20 microns to 300 microns, and the scope of width W is generally 10 microns to 150 microns.It should be noted that, the shape of described first electrode 101 is not generally regular rectangular shape.In addition, the length L of the first electrode 101 and width W also not limit to aforementioned usual scope.
One first electrode 101 in described driving circuit 20 non-concurrent driving 2 first electrodes 101 performs self-capacitance touch-sensing, another first electrode 101 performs image display and refreshes.Correspondingly, for realizing aforementioned type of drive, in one embodiment, described driving circuit 20 non-concurrent provides touch-sensing drive singal and gray scale voltage to described touch display panel 10.So, change ground, in other embodiments, described driving circuit 20 also can provide touch-sensing drive singal and gray scale voltage to described touch display panel 10 simultaneously, but the output of driving circuit 20 one first electrode 101 reached in control non-concurrent driving 2 first electrodes 101 own performs self-capacitance touch-sensing, another first electrode 101 performs the object that image display refreshes by controlling.Because along with the development of circuit engineering and touch display panel 10 technology, increasing circuit can be formed in touch display panel 10, therefore, described driving circuit 20 may export touch-sensing drive singal and gray scale voltage to described touch display panel 10 simultaneously, but it be not this situation simultaneously exporting to the first electrode 101 is also possible.
Refer to Fig. 3, Fig. 3 is the electrical block diagram of the another embodiment of inventive touch display device 1.Described touch display panel 10 comprises multi-strip scanning line 102, a plurality of data lines 103, multiple gauge tap 104 and the second electrode 105 further.Described multi-strip scanning line 102 insulate arranged in a crossed manner with described a plurality of data lines 103.Described multiple gauge tap 104 is separately positioned on the insulation infall of described multi-strip scanning line 102 and described a plurality of data lines 103.Each gauge tap 104 comprises control electrode G, the first transmission electrode S and the second transmission electrode D.Wherein, described control electrode G connects sweep trace 102, and described first transmission electrode S connection data line 103, described second transmission electrode D connects the first electrode 101.For the formation of electric field between described second electrode 105 and described first electrode 101, to control the transmittance of touch display panel 10.In this enforcement side, owing to being for touch liquid crystal display device, therefore, correspondingly, the second electrode 105 is public electrode.
In the present embodiment, described multi-strip scanning line 102 is arranged with the square crossing of described a plurality of data lines 103.Particularly, described multi-strip scanning line 102 all extends along first direction X, arranges each other along second direction Y; Described a plurality of data lines 103 all extends along second direction Y, arranges each other along first direction X.In the present embodiment, described first direction X is line direction, and described second direction Y is column direction.Change ground, in other embodiments, described first direction X also can be column direction, and described second direction Y is line direction.In addition, described first direction X and described second direction Y also can be non-perpendicular.
In the present embodiment, described gauge tap 104 is thin film transistor switch.Described thin film transistor switch comprises amorphous silicon film transistor switch, low-temperature polysilicon film transistor switch, high temperature polysilicon thin film transistor switch, metal oxide thin-film transistor switch etc.Wherein, described metal oxide thin-film transistor switch is as being indium oxide gallium zinc (IGZO) thin film transistor switch.Correspondingly, described control electrode G is grid, and described first transmission electrode S is source electrode, and described second transmission electrode D is drain electrode.So, change ground, in other embodiments, described gauge tap 104 also can be the switch of other suitable type, e.g., and double pole triode switch.
Described driving circuit 20, for providing touch-sensing control signal to described multi-strip scanning line 102, activates the gauge tap 104 be connected with described multi-strip scanning line 102.In addition, described driving circuit 20 is also for providing described touch-sensing drive singal to described a plurality of data lines 103, described touch-sensing drive singal is transferred to the first electrode 101 by the gauge tap 104 activated, thus, drive described first electrode 101 to perform self-capacitance touch-sensing.
Described touch-sensing drive singal is the voltage signal of change, such as, be periodically variable square-wave pulse signal.So, described touch-sensing drive singal also can be other suitable drive singal such as current signal, is not defined as voltage signal, and in addition, described touch-sensing drive singal also can be nonperiodic signal, and other suitable waveform signal such as sine wave, trapezoidal wave.
In the present embodiment, when touch-sensing, the pressure reduction between described touch-sensing control signal and described touch-sensing drive singal remains unchanged.Correspondingly, described touch-sensing control signal is also the signal of change, and makes gauge tap 104 conducting.
Because described touch display panel 10 is when performing touch-sensing, pressure reduction between described touch-sensing control signal and described touch-sensing drive singal remains unchanged, thus the charge/discharge electricity amount of the stray capacitance formed between control electrode G and the first electrode 101 can be reduced, and then improve touch-sensing precision.
Further, when the first electrode 101 performs touch-sensing, described driving circuit 20 can provide secondary signal to the sweep trace 102 be connected with the first electrode 101 of non-executing touch-sensing further, described secondary signal can make gauge tap 104 be in cut-off state, the pressure reduction between touch-sensing drive singal can also be kept constant simultaneously.
Such as, described secondary signal can be provided to the sweep trace 102 of the first electrode 101 of contiguous execution touch-sensing or all sweep traces 102 be connected with the first electrode 101 of non-executing touch-sensing.Wherein, for the concept of " vicinity ", illustrate, as, 41st the first electrode 101 driven circuit 20 walking to the 80th row drives simultaneously and performs self-capacitance touch-sensing, that the 1st article to the 40th article sweep trace 102 is the sweep trace of the first electrode 101 of contiguous 41st row, and the 81st article to the 120th article sweep trace 102 is the sweep trace of the first electrode 101 of contiguous 80th row.The sweep trace 102 of " vicinity " is such as the sweep trace 102 (with regard to one-sided) within adjoin the first electrode 101 performing touch-sensing 40.So, the number of the sweep trace 102 of described " vicinity " also extends to the sweep trace 102 (with regard to one-sided) within 200.
Described touch-sensing control signal, except the voltage signal for above-mentioned change, changes ground, in other embodiments, also can be constant signal for the touch-sensing control signal activating described gauge tap 104.In addition, touch-sensing control signal also and unrestricted certain and touch-sensing drive singal keeps pressure reduction constant.
Described driving circuit 20 be further used for by activate gauge tap 104 and data line 103 receive from first electrode 101 export touch-sensing detection signal, and know that touch display panel 10 is touched or close position by target object (that is, above-mentioned touch object) according to described touch-sensing detection signal.Described target object, as the position such as finger, toe for user, also can be the object of other suitable type, as felt pen etc., and following main take target object as finger for example is described.The electric capacity defined between described target object and the first electrode 101 is hand capacity (not shown).
When performing touch-sensing, described driving circuit 20 can drive sweep trace 102 line by line, also once can drive at least two sweep traces 102 simultaneously.In one embodiment, such as, drive at least two sweep traces 102 at every turn simultaneously.Described at least two sweep traces 102 are adjacent scanning lines.So, change ground, described at least two sweep traces 102 also can not be adjacent scanning lines, e.g., are other suitable situations such as interlaced line.Further, when sweep trace 102 is scanned or gauge tap 104 is activated, described driving circuit 20 performs self-capacitance touch-sensing to part or all of first electrode 101 be connected with active control switch 104.In other words, described driving circuit 20 provides touch-sensing drive singal to part or all of data line 103.
When described driving circuit 20 is for performing self-capacitance touch-sensing to the first electrode 101 be connected with segment data line 103, described driving circuit 20 provides the 3rd signal to the data line 103 be connected with the first electrode 101 of non-executing touch-sensing further, and the pressure reduction between described 3rd signal and described touch-sensing drive singal remains unchanged.
Such as, described 3rd signal can be provided to the data line 103 of the first electrode 101 of contiguous execution touch-sensing or all data lines 103 be connected with the first electrode 101 of non-executing touch-sensing.Wherein, for the concept of " vicinity ", illustrate, as, 51st row drive execution self-capacitance touch-sensing to the first electrode 101 driven circuit 20 of the 100th row simultaneously, that the 1st article to the 50th article data line 103 is the data line of the first electrode 101 of contiguous 51st row, and the 101st article to the 150th article data line 103 is the data line of the first electrode 101 of contiguous 100th row.The data line 103 of " vicinity " is such as the data line 103 (with regard to one-sided) within adjoin the first electrode 101 performing touch-sensing 50.So, the number of the data line 103 of described " vicinity " also extends to the data line 103 (with regard to one-sided) within 250.
Further, described driving circuit 20 is also for providing sweep signal to described multi-strip scanning line 102, activate the gauge tap 104 be connected with described multi-strip scanning line 102, the gray scale voltage that described driving circuit 20 provides is transferred to the first electrode 101 by data line 103 and the gauge tap 104 activated, in addition, described driving circuit 20 also provides common electric voltage to the second electrode 105, thus drives described touch display panel 10 to perform image display refreshing.Wherein, the described sweep signal for active control switch 104 is preferably constant voltage.Pressure reduction between described first electrode 101 and the second electrode 105 is for determining the display gray scale rank of touch display unit 1.
As can be seen from describing above, because inventive touch display device 1 performs touch-sensing function by the described multi-strip scanning line 102 of multiplexing display panel, a plurality of data lines 103, multiple gauge tap 104 and multiple first electrode 101, therefore, touch display unit 1 of the present invention and to have the electronic equipment 100 of described touch display unit 1 more lightening.
Described driving circuit 20 when driving first electrode 101 performs touch-sensing be supplied to the second electrode 105 common electric voltage (or being called " the first signal ") from drive the first electrode 101 perform image show refresh time to be supplied to the common electric voltage of the second electrode 105 different, wherein, described driving circuit 20 when driving first electrode 101 performs touch-sensing the pressure reduction be supplied between the common electric voltage of the second electrode 105 and the touch-sensing drive singal being supplied to the first electrode 101 remain unchanged; Described driving circuit 20 driving first electrode 101 to perform when image display refreshes be supplied to the second electrode 105 common electric voltage can be a constant voltage, so, also can be square-wave signal.
Due to described driving circuit 20 when driving first electrode 101 performs touch-sensing the pressure reduction be supplied between the common electric voltage of the second electrode 105 and the touch-sensing drive singal being supplied to the first electrode 101 remain unchanged, therefore, the capacitive coupling interference that can reduce or avoid the second electrode 105 to bring when the first electrode 101 performs touch-sensing, thus improve touch-sensing precision.
So, change ground, described driving circuit 20 when driving first electrode 101 performs touch-sensing be supplied to the second electrode 105 common electric voltage (or being called " the first signal ") with drive the first electrode 101 perform image show refreshes time institute be supplied to the common electric voltage of the second electrode 105 also can be identical, be sense effect above-mentioned effective comparatively speaking.
Usually, electronic equipment generally includes bright screen duty and blank screen holding state.At blank screen holding state, electronic equipment does not do substantive work usually, and touch display panel presents black, does not have light to pass.Relatively, in bright screen duty, electronic equipment has light to pass touch display panel, and can perform corresponding function.Particularly, bright screen duty can comprise again bright screen screen lock state and bright screen released state.When electronic equipment is in blank screen holding state, user needs the power key or the Home key that first click electronic equipment, wake touch display unit up to bright screen screen lock state, then, user inputs password again, when password is correct, touch display unit enters released state, and user can start to control electronic equipment and perform corresponding function.
So, be no matter power key or Home key after the pressing of a large amount of number of times, may will be malfunctioning, cause the part needing more to renew.In addition, the program step that above-mentioned control electronic equipment is switched to released state from blank screen holding state is slightly aobvious numerous and diverse, and correspondingly, the present inventor proposes the new wake-up mode of electronic equipment by large quantity research correspondence.
At blank screen holding state, touch display unit 1 of the present invention performs touch-sensing function, and when target object touches described touch display panel 10 by predetermined way, described touch display unit 1 wakes up to enter screen lock state or directly enter separates screen state.Wherein, described predetermined way as being specific touch path etc., thus, service property (quality) and the service efficiency of product can be improved, make electronic equipment 100 more humane.
In order to clear difference, defining described driving circuit 20, to perform at driving first electrode 101 common electric voltage being supplied to the second electrode 105 when image display refreshes be the first common electric voltage; Define described driving circuit 20 and be in bright screen duty and the common electric voltage being supplied to the second electrode 105 when driving first electrode 101 performs touch-sensing is the second common electric voltage at electronic equipment 100; Define described driving circuit 20 and be in blank screen holding state and the common electric voltage being supplied to the second electrode 105 when driving first electrode 101 performs touch-sensing is the 3rd common electric voltage at electronic equipment 100.
Particularly, at blank screen holding state, described driving circuit 20 provides touch-sensing drive singal to the first electrode 101, and provides the 3rd common electric voltage to the second electrode 105.Wherein, described touch-sensing drive singal is identical with described 3rd common electric voltage, thus not only makes touch display panel 10 show black picture, also makes touch display panel 10 perform touch-sensing function.
Further, at blank screen holding state, described driving circuit 20 stops providing gray scale voltage to the first electrode 101, and stops providing the first common electric voltage to the second electrode 105.That is, at blank screen holding state, touch display unit 1 preferably continues to perform touch-sensing.So, change ground, at blank screen holding state, described driving circuit 20 also can drive the first electrode 101 timesharing to perform image display refreshing and self-capacitance touch-sensing.Wherein, when performing image display and refreshing, the gray scale voltage that driving circuit 20 is supplied to the first electrode 101 is identical with the common electric voltage being supplied to the second electrode 105, thus realizes the display of black picture.
It should be noted that, in bright screen duty, when described driving circuit 20 drives described touch display panel 10 to perform touch-sensing, provide the second common electric voltage to the second electrode 105.Described second common electric voltage is optional is different from described 3rd common electric voltage.
Usually, display panels comprises multiple pixel cell, and each pixel cell comprises the sub-pixel of R, G, B tri-kinds of colors, by controlling the emitting brightness of the sub-pixel of three kinds of colors, thus realizes the coloured image display of different GTG.Wherein, each sub-pixel comprises gauge tap, the pixel electrode be connected with gauge tap and public electrode.The voltage that described pixel electrode and public electrode load determines the deflection angle of liquid crystal molecule, thus the transmittance of determinant pixel, the color in conjunction with colored filter realizes coloured image display.
Refer to Fig. 4, Fig. 4 is the dot structure schematic diagram of existing low temperature polycrystalline silicon display panels.Find through the large quantity research of inventor, for low temperature polycrystalline silicon display panels 38, every scan line 382 connects the sub-pixel of same color, for a pixel cell 385: three adjacent sweep traces 382 connect sub-pixel R, G, B of three colors respectively, and same data line 383 connects sub-pixel R, G, B of three colors of same pixel cell 385.Therefore, when performing image display and refreshing, the scanning to a pixel cell 385 be completed, need more sweep time.
Relatively, refer to Fig. 5, Fig. 5 is the dot structure schematic diagram of an embodiment of inventive touch display panel.The touch display panel 10 of this embodiment is low temperature polycrystalline silicon touch display panel, that is, gauge tap 104 is low-temperature polysilicon film transistor switch.Described touch display panel 10 comprises multiple pixel cell 116, and each pixel cell 116 comprises the sub-pixel (such as: the pixel cell 116 had also may comprise other sub-pixel of such as white sub-pixels) of red (R), green (G), blue (B) three kinds of colors.The first electrode 101 and the second electrode 105 (asking for an interview Fig. 3) that each sub-pixel comprises gauge tap 104, is connected with gauge tap 104.In the present embodiment, the sub-pixel belonging to same pixel cell 116 is arranged on two adjacent row instead of three row, thus saves a sweep trace 102, and then saves sweep time.
In order to understand this embodiment better, the label declaration for sub-pixel each in Fig. 5 is as follows:
Need first to illustrate, in view of the sub-pixel in same pixel cell 116 is positioned at adjacent rows, correspondingly, the pixel cell 116 being positioned at adjacent rows is divided into one group of pixel cell.Such as, the pixel cell 116 of the first row and the second row is first group of pixel cell, and the pixel cell 116 of the third line and fourth line is second group of pixel cell, by that analogy.Each pixel cell 116 in same group of pixel cell increases progressively sign successively by direction from left to right.
Correspondingly, each sub-pixel according to color, sub-pixel place pixel cell 116 be belong to which group pixel cell and the position of pixel cell 116 in group indicate.With sub-pixel R
11for example, R
11in letter " R " represent red sub-pixel, the first digit " 1 " in lower footnote " 11 " represents first group of pixel cell, and second digit " 1 " represents first pixel cell in first group of pixel cell.
G
23in letter " G " represent green sub-pixels, the numeral " 2 " in lower footnote " 23 " represents second group of pixel cell, and numeral " 3 " represents the 3rd pixel cell in second group of pixel cell.
According to as above indicating rule, the red, green, blue sub-pixel in each pixel cell 116 on described touch display panel 10 is labeled as R
11, G
11, B
11, R
12, G
12, B
12, R
13, G
13, B
13, R
14, G
14, B
14, R
21, G
21, B
21, R
22, G
22, B
22, R
23, G
23, B
23, R
24, G
24, B
24, R
31, B
31, G
32, R
33, B
33, G
34.The present invention is for the sub-pixel of these quantity, and so, the quantity of the sub-pixel of actual product not as shown in Figure 5.
For the touch display panel of low temperature polycrystalline silicon shown in Fig. 5 10, every scan line 102 connects the sub-pixel of at least two kinds of colors, and each data line 103 connects the sub-pixel of at least two kinds of colors.
Such as, every scan line 102 connects the sub-pixel of three kinds of colors, and each data line 103 connects the sub-pixel of two kinds of colors.
Along sweep trace 102 bearing of trend, adjacent two pixel cells 116 share two sweep traces 102 and three data lines 103.
Along data line 103 bearing of trend, adjacent two pixel cells 116 share four sweep traces 102 and two data lines 103.
Due to low temperature polycrystalline silicon touch display panel 10 adjacent pixel unit 116 no matter sweep trace 102 bearing of trend or data line 103 bearing of trend the number of sweep trace 102 that shares tail off, thus, described low temperature polycrystalline silicon touch display panel 10 shortens the sweep time when performing image display and refreshing, correspondingly, display refreshing frequency can be improved.
It should be noted that, in this embodiment, limiting gauge tap 104 is low-temperature polysilicon film transistor switch, so, in other each embodiment, not limiting gauge tap 104 is low-temperature polysilicon film transistor switch, can be low-temperature polysilicon film transistor switch, but also can be the switch of other suitable type.
Refer to Fig. 6, Fig. 6 is the structural representation of the another embodiment of touch display panel 10.Described touch display panel 10 comprises the second substrate 107 that first substrate 106 and first substrate 106 are oppositely arranged and the display medium layer 108 be arranged between described first substrate 106 and second substrate 107 further.In the present embodiment, described display medium layer 108 is liquid crystal layer.Described first substrate 106 is transparency carrier with described second substrate 107, as being glass substrate or film substrate etc.Described multi-strip scanning line 102, a plurality of data lines 103, multiple gauge tap 104, second electrode 105 and described multiple first electrode 101 are arranged between described first substrate 106 and second substrate 107.
In the present embodiment, described multi-strip scanning line 102, a plurality of data lines 103, multiple gauge tap 104 and described multiple first electrode 101 are formed on second substrate 107, form array base palte, as thin film transistor (TFT) (TFT) array base palte.In addition, in order to realize coloured image display, at first substrate 106, the element such as colored filter and black matrix" (not shown) being preferably set in the face of the side of described second substrate 107, forming colored filter (CF) substrate.Wherein, described first substrate 106 is used for image display back to the side of described second substrate 107 and receives the touch of user or close input.The side defining the touch or close input that first substrate 106 shows for image and receives user is touch display side A.
Form fringe field between described first electrode 101 and the second electrode 105, to control the deflection angle of liquid crystal molecule, thus control the transmittance of touch display panel 10.In this embodiment, described second electrode 105 is positioned at different layers with described multiple first electrode 101, and with the stacked setting of described multiple first electrode 101.Further, described second electrode 105 is between described display medium layer 108 and described multiple first electrode 101.Wherein, described second electrode 105 is provided with engraved structure 115 in the region of corresponding first electrode 101, to make to form fringe field between described second electrode 105 and described multiple first electrode 101.
See also Fig. 7, Fig. 7 is the part enlarged plan view of the second electrode 105 and the first electrode 101 shown in Fig. 6.Multiple engraved structures 115 of corresponding same first electrode 101 along third direction arrangement, and extend along fourth direction.In the present embodiment, described third direction is identical with first direction X, and described fourth direction is identical with second direction Y.So, the present invention is not restricted to this, and described third direction also can be identical with second direction Y, and described fourth direction is identical with first direction X, or third direction, fourth direction are all different from first direction X, second direction Y.Described multiple engraved structure 115 is such as bar shaped, and so, described multiple engraved structure 115 also can be other suitable shape, and the present invention does not limit this.Again such as, the size and shape of described multiple engraved structure 115 is identical, so, changes ground, and the size and shape of described multiple engraved structure 115 also can be different.
In the direction of arranging along described multiple engraved structure 115 (just to same first electrode 105), the width L1 of described engraved structure 115 is more than or equal to the width L2 in region between adjacent engraved structure 115, or/and, just (region of even oblique line is beaten to the region 113 between the adjacent engraved structure 115 of same first electrode 101, to distinguish engraved structure 115) area A 2 be preferably less than or equal to the area A 1 of an engraved structure 115, wherein, the edge in the region 113 between described adjacent engraved structure 115 does not exceed the edge of engraved structure 115.Correspondingly, the capacitive coupling area between described first electrode 101 and target object is large to straining, and then can improve touch-sensing precision.
Refer to Fig. 8, Fig. 8 is the cut-away section structural representation of the another embodiment of touch display panel described in Fig. 6 10.For the touch display panel shown in the touch display panel 10, Fig. 8 described in difference Fig. 6 is denoted as 10a, in described touch display panel 10a, adopt identical label with same or similar element in described touch display panel 10.Described touch display panel 10a is substantially identical with described touch display panel 10, and the key distinction of the two is: described second electrode 105 is arranged between the first electrode 101 and second substrate 107; In addition, display medium layer 108 and first substrate 106 is omitted.
Because the first electrode 101 is arranged on the second electrode 105, therefore, correspondence can be done the first electrode 101 greatly relatively, thus improves with target object or touch the capacity area that object is coupled, and then, raising touch-sensing precision.
When described second electrode 105 is arranged between the first electrode 101 and second substrate 107, described second electrode 105 can not arrange engraved structure 115.So, in order to improve edge electric field strength, can select correspondence on the first electrode 101 that engraved structure 115 as above is set.Change ground, when the first electrode 101 is between first substrate 106 and the second electrode 105, the first electrode 101 and the second electrode 105 also all can not arrange engraved structure.
See also Fig. 9, Fig. 9 is the part enlarged plan view of the second electrode 105 and the first electrode 101 shown in Fig. 8.Also domain of the existence 113 between adjacent engraved structure 115 on same first electrode 101.Correspondingly, multiple engraved structures 115 on same first electrode 101: the direction of arranging along described multiple engraved structure 115, the width L1 of described engraved structure 115 is less than or equal to the width L2 in region between adjacent engraved structure 115, or/and, the area A 2 in the region 113 between adjacent engraved structure 115 is preferably greater than or equal to the area A 1 of an engraved structure 115, wherein, the edge in the region 113 between described adjacent engraved structure 115 does not exceed the edge of engraved structure 115.Correspondingly, the capacitive coupling area between described first electrode 101 and target object is large to straining, and then can improve touch-sensing precision.
It should be noted that, be no matter described second electrode 105 to be arranged on described first electrode 101 or under, between this two classes electrode, insulation course (sign) is all set.
In addition, the present invention does not limit between described first electrode 101 and the second electrode 105 and forms fringe field, changes ground, can form vertical electric field between described second electrode 105 and described first electrode 101 yet.Correspondingly, described second electrode 105 is arranged between first substrate 106 and display medium layer 108, and it is also feasible that second substrate 107 is used as above-mentioned touch display side A back to the side of described first substrate 106.In addition, described multiple first electrode 101 also can be positioned at same layer with described second electrode 105, equally also can form fringe field.
Because data line 103 and gauge tap 104 are for transmitting touch-sensing drive singal to described first electrode 101, therefore, when target object touch respective data lines 103 on touch display panel 10 or/and the position of gauge tap 104 time, thus, the precision of false sensing or the real sensing of impact can be caused.
Correspondingly, in order to overcome foregoing problems, in described touch display panel 10, screen layer can be set further, described screen layer between described first substrate 106 and data line 103 and gauge tap 104, for covering described data line 103 and gauge tap 104.Described driving circuit 20 provides shielded signal to described screen layer.Pressure reduction between described shielded signal and described touch-sensing drive singal remains unchanged, thus avoids data line 103 and gauge tap 104 on the impact of the sensing precision of the first electrode 101.Certainly, described screen layer one of also only can to cover in described data line 103 and this two class component of gauge tap 104 class component, and correspondence also can solve the problem to a certain extent, and and not necessarily limit and cover this two class component, preferably, at least cover data line 103.
It should be noted that, described screen layer can be structure as a whole, and also can be Split type structure.When screen layer is Split type structure, described screen layer comprises the first guarded electrode and secondary shielding electrode, and wherein, described first guarded electrode partially or completely covers described data line 103, described secondary shielding electrode part or cover described gauge tap 104 completely.
Further, owing to there is stray capacitance between described sweep trace 102 and described first electrode 101, therefore, when target object touches the position of corresponding sweep trace 102 on touch display panel 10, the touch-sensing precision of the first electrode 101 can also be affected.Correspondingly, described screen layer correspondence covers described sweep trace 102, or described screen layer comprises the 4th guarded electrode further, and described 4th guarded electrode partially or completely covers described sweep trace 102.Preferably, described screen layer covers described multi-strip scanning line 102, a plurality of data lines 103 and multiple gauge tap 104 completely.
When additionally arranging screen layer, though can solve the technical matters of sensing precision step-down, but in a disguised form can increase the thickness of touch display panel 10, therefore, the present invention proposes to select multiplexing second electrode 105 as described screen layer.
See also Figure 10 and Fig. 6, Figure 10 is the structural representation after the assembling of touch display panel 10 shown in Fig. 6.Adjacent two pleurapophysis of described second substrate 107 for described first substrate 106, for edge cabling.Different according to the size of touch display panel 10, such as undersized touch display panel, described second substrate 107 also only can protrude from described first substrate 106 in side.Described first substrate 106 is defined as with the described equitant region of second substrate 107 and touches viewing area T, and the region that second substrate 107 protrudes from described first substrate 106 is defined as marginarium H.Described second electrode 105 such as cover completely be positioned at the data line 103 of described touch viewing area T, sweep trace 102, gauge tap 104.
At described marginarium H, the first connecting line 109, second connecting line 110 and the 3rd guarded electrode 111 are set further.Described first connecting line 109 is for connecting described data line 103 to described driving circuit 20 (see Fig. 3).It should be noted that, Fig. 3 eliminates described first connecting line 109, second connecting line 110 and the 3rd guarded electrode 111.Described second connecting line 110 is for connecting described sweep trace 102 to described driving circuit 20 (see Fig. 3).Described first connecting line 109 and described second connecting line 110 are between described 3rd guarded electrode 111 and described second substrate 107.Described driving circuit 20 is for providing shielded signal to described 3rd guarded electrode 111.Thus, the impact on touch-sensing precision when avoiding target object to touch the marginarium H of electronic equipment 100.Preferably, the pressure reduction between described shielded signal and described touch-sensing drive singal remains unchanged.
It should be noted that, also need to arrange insulation course between described 3rd guarded electrode 111 and described first connecting line 109, described second connecting line 110.
For described first connecting line 109: or identical with the material of described control electrode G, or it is identical with the material of data line 103, or it is identical with the material of the first electrode 101, or it is identical with the material of the second electrode 105, or identical with the material of the first transmission electrode S, the second transmission electrode D, or by be different from control electrode G, data line 103, first electrode 101, second electrode 105, first, second transmission electrode S, D conductive material make.
For described second connecting line 110: or identical with the material of described control electrode G, or it is identical with the material of data line 103, or it is identical with the material of the first electrode 101, or it is identical with the material of the second electrode 105, or identical with the material of the first transmission electrode S, the second transmission electrode D, or by being different from control electrode G, data line 103, first electrode 101, making with the conductive material of the second electrode 105, first, second transmission electrode S, D.
For described 3rd guarded electrode 111: or identical with the material of control electrode G, or it is identical with the material of the first electrode 101, or it is identical with the material of data line 103, or it is identical with the material of the second electrode 105, or identical with the material of the first transmission electrode S, the second transmission electrode D, or by be different from the first electrode 101, data line 103, second electrode 105, first, second transmission electrode S, D conductive material make.
Particularly, for the first connecting line 109, second connecting line 110, with the 3rd guarded electrode 111, when making, multiple situation can be divided to be formed, in following main for gauge tap 104 for bottom gate thin film transistor (Bottom-gateTFT) switch is described, so, described gauge tap 104 also can be top gate type (Top-gateTFT) thin film transistor switch, first connecting line 109, second connecting line 110, the production order of some part (as control electrode G) of the 3rd guarded electrode 111 and respective element in touch display panel 10 (as data line 103) or element is corresponding to be adjusted, therefore, the protection domain of the application all should be fallen into from can directly or indirectly the derive content learnt of described content below.
First, when the material of the material of the first connecting line 109, the second connecting line 110 is all identical with the material of control electrode G, the material of the first connecting line 109, the material of the second connecting line 110 preferably adopt same layer material to make with control electrode G, more preferably, the first connecting line 109, second connecting line 110 is formed with control electrode G simultaneously.Thus, material can be saved and make man-hour, enhance productivity and reduce cost of products.
Because gauge tap 104 is bottom gate thin film transistor switch, consider production order, therefore, accordingly, the 3rd guarded electrode 111 and the first electrode 101 are made up of same layer material, and are preferably formed simultaneously; Or the 3rd guarded electrode 111 is made up of same layer material with data line 103, and is preferably formed simultaneously; Or the 3rd guarded electrode 111 and the second electrode 105 are made up of same layer material, and are preferably formed simultaneously; Or the 3rd guarded electrode 111 is made up of same layer material with first, second transmission electrode S, D, and is preferably formed simultaneously; Or the 3rd guarded electrode 111 adopts extra layer of conductive material to make.
Similarly, when the first connecting line 109, second connecting line 110 is all identical with data line 103 material, the first connecting line 109, second connecting line 110 preferably and data line 103 adopt same layer material to make, more preferably, three is formed simultaneously.
Accordingly, the 3rd guarded electrode 111 and the first electrode 101 are made by same layer material, and are preferably formed simultaneously; Or the 3rd guarded electrode 111 and the second electrode 105 are made by same layer material, and are preferably formed simultaneously; Or the 3rd guarded electrode 111 is made up of same layer material with first, second transmission electrode S, D, and is preferably formed simultaneously; Or the 3rd guarded electrode 111 adopts extra layer of conductive material to make.
In addition, first connecting line 109, second connecting line 110 also can adopt extra layer of conductive material to make, 3rd guarded electrode 111 is made by same layer material with certain part of respective element in touch display panel 10 or element, and preferably formed simultaneously, or it is also to obtain that the 3rd guarded electrode 111 also adopts extra layer of conductive material to make.
Change ground, the first connecting line 109, second connecting line 110, with the 3rd guarded electrode 111 conductive material of different layers also can be adopted to make.Repeat no more about various specific embodiments herein, various situation can be derived according to foregoing.
It should be noted that, when some part with the respective element in touch display panel 10 or element is made by same layer material, notice that the production order of some part of respective element or element in the production order of the first connecting line 109, second connecting line 110, the 3rd guarded electrode 111 and touch display panel 10 will successively be consistent.In addition, the aforementioned element preferably simultaneously formed also can be formed in other embodiments in timesharing, and the present invention does not limit this.
Referring again to Fig. 3, described driving circuit 20 comprises touch driving circuit 201, display driver circuit 203 and public voltage generating circuit 207.Wherein, described touch driving circuit 201 is connected respectively with sweep trace 102 and data line 103, for providing touch-sensing control signal to sweep trace 102, also for providing touch-sensing drive singal to the first electrode 101 by data line 103 and gauge tap 104, the first electrode 101 is driven to perform self-capacitance touch-sensing.Described display driver circuit 203 is connected respectively with sweep trace 102 and data line 103, for providing sweep signal to sweep trace 102, for providing gray scale voltage to the first electrode 101 by data line 103 and gauge tap 104, described public voltage generating circuit 207, also for providing the first common electric voltage to the second electrode 105, performing image display and refreshing.
Described driving circuit 20 comprises control circuit 205 further.Described control circuit 205 is connected respectively with described touch driving circuit 201 and described display driver circuit 203, for controlling to be that described touch driving circuit 201 exports touch-sensing control signal and touch-sensing drive singal and exports sweep signal and gray scale voltage to described touch display panel 10 to described touch display panel 10 or described display driver circuit 203.In addition, described control circuit 205 also for control described driving circuit 20 the first electrode 101 perform image display refresh with touch-sensing time, provide different common electric voltage to the second electrode 105 respectively.It should be noted that, described driving circuit 20 is when the first electrode 101 performs image display refreshing with touch-sensing, and the common electric voltage being supplied to the second electrode 105 also can be identical.
Preferably, described touch driving circuit 201 comprises touch-sensing control circuit 2011 and touch-sensing testing circuit 2013.Described touch-sensing control circuit 2011 is connected with described multi-strip scanning line 102, for providing touch-sensing control signal to described multi-strip scanning line 102, activates the gauge tap 104 be connected with sweep trace 102.Described touch-sensing testing circuit 2013 is connected with described a plurality of data lines 103, for providing touch-sensing drive singal to the first electrode 101 by the gauge tap 104 of data line 103 and activation, drives the first electrode 101 to perform self-capacitance touch-sensing.Described touch-sensing testing circuit 2013 receives with data line 103 the touch-sensing detection signal exported from the first electrode 101 further by the gauge tap 104 activated, and knows that touch display panel 10 is touched or close position by target object according to described touch-sensing detection signal.Wherein, touch-sensing control circuit 2011 or formation in the chips, or are formed on touch display panel 10.When being formed on touch display panel 10, touch-sensing control circuit 2011 and gauge tap 104 are such as together formed in (described second substrate 107 is shown in Fig. 6) on the second substrate 107 of touch display panel 10.
Described display driver circuit 203 comprises scan drive circuit 2031 and data drive circuit 2033.Described scan drive circuit 2031 is connected with described multi-strip scanning line 102, for providing sweep signal to described multi-strip scanning line 102, activates the gauge tap 104 be connected with sweep trace 102.Described data drive circuit 2033 is connected with described a plurality of data lines 103, for providing gray scale voltage to described multiple first electrode 101 by the gauge tap 104 of data line 103 and activation, driving described multiple first electrode 101 to perform image display and refreshing.Wherein, scan drive circuit 2031 or formation in the chips, or are formed on touch display panel 10.When being formed on touch display panel 10, scan drive circuit 2031 and gauge tap 104 are preferably together formed in (described second substrate 107 is shown in Fig. 6) on the second substrate 107 of touch display panel 10.
It should be noted that, shown in Fig. 3 is that touch-sensing testing circuit 2013 is positioned at the relative both sides of touch display panel 10 with data drive circuit 2033, be connected with the opposite end of data line 103 respectively, so, preferably, touch-sensing testing circuit 2013, data drive circuit 2033 are all connected (seeing below Figure 13 and Figure 14) with the terminal of data line 103 the same side, and Fig. 3 is limited to the size of accompanying drawing and touch-sensing testing circuit 2013, data drive circuit 2033 are connected with the opposite end of data line 103 by element annexation correspondence.
Preferably, described driving circuit 20 comprises public voltage generating circuit 207 further.Described public voltage generating circuit 207 is connected with described control circuit 205, for generation of described first common electric voltage, the second common electric voltage and the 3rd common electric voltage, and under the control of control circuit 205, the corresponding common electric voltage of corresponding output gives the second electrode 105.
Particularly, when touch display unit 1 performs image, control circuit 205 controls public voltage generating circuit 207 provides the first common electric voltage to the second electrode 105; When touch display unit 1 is in bright screen duty and performs self-capacitance touch-sensing, control circuit 205 controls public voltage generating circuit 207 provides the second common electric voltage to the second electrode 105; When touch display unit 1 is in blank screen holding state and performs self-capacitance touch-sensing, control circuit 205 controls public voltage generating circuit 207 provides the 3rd common electric voltage to the second electrode 105.
In the present embodiment, described touch-sensing control circuit 2011 comprises multiple output terminal a.Each output terminal a connects at least two sweep traces 102.Described touch-sensing control circuit 2011 exports touch-sensing control signal at least two sweep traces 102 by each output terminal a simultaneously, activates the gauge tap 104 be connected with described at least two sweep traces 102.Change ground, the output terminal a of described touch-sensing control circuit 2011 also can connect a sweep trace 102.Wherein, touch-sensing control circuit 2011 once exports touch-sensing control signal at least two sweep traces 102 by an output terminal a, in addition, also once can export touch-sensing control signal to multi-strip scanning line 102 by multiple output terminal a, the present invention does not limit this simultaneously.
Described touch-sensing testing circuit 2013 comprises multiple transmission ends b.Preferably, transmission ends b connects at least two data lines 103.Described touch-sensing testing circuit 2013 exports touch-sensing drive singal to described at least two data lines 103 by described transmission ends b, and is received the touch-sensing detection signal exported from described at least two data lines 103 by described transmission ends b.Change ground, the transmission ends b of described touch-sensing testing circuit 2013 also can connect a data line 103.Described at least two data lines 103 are such as adjacent data line.So, described at least two data lines 103 also can be non-conterminous data line, e.g., for every other appropriate circumstances such as column data lines.
Can find out, when performing touch-sensing, described multiple first electrode 101 is divided into many groups, forms one group, be connected in parallel into a touch-sensing electrode with multiple first electrodes 101 that same output terminal a is connected with same transmission ends b.Preferably, be in parallel the first electrode 101 arrangement in matrix form connected.The touch-sensing electrode pair that multiple first electrodes 101 of same group are connected in parallel should limit a touch point on touch display panel 10, described touch point is such as long and the wide square area being 1mm, but the application is not as limit, described touch point also can be long and the wide rectangular area being respectively other size, correspondingly, the increasing number of the first electrode 101 or minimizing, or the size of the first electrode 101 own has corresponding change.One group is only had to the situation of first electrode 101, this group is the corresponding touch point limited on touch display panel 10 too.As previously mentioned, because the first electrode 101 is approximate rectangular, therefore, described square area and rectangular area also correspond to approximating square region and approximate rectangular region.
In the present embodiment, each output terminal a connects at least two sweep traces 102, and fractional transmission end b connects at least two data lines 103 respectively, and fractional transmission end b connects a data line 103 respectively.Change ground, in other embodiments, also can be fractional transmission end b and connect at least two data lines 103 respectively, fractional transmission end b connects a data line 103 respectively; Part output terminal a connects at least two sweep traces 102 respectively, and part output terminal a connects scan line 102 respectively.Correspondingly, described multiple first electrode 101 is divided into many groups, and at least one group comprises at least two the first electrodes 101 be connected in parallel, and at least one group comprises one first electrode 101.
Alternatively, the number that the sweep trace 102 being positioned at touch display panel 10 edge is connected with an output terminal a is less than the number being positioned at the sweep trace 102 in the middle part of touch display panel 10 and being connected with another output terminal a; And/or the number that the data line 103 being positioned at touch display panel 10 edge is connected with a transmission ends b is less than the number being positioned at the data line 103 in the middle part of touch display panel 10 and being connected with another transmission ends b.Correspondingly, the edge touch-sensing precision of described touch display panel 10 is improved.
The touch point being positioned at touch display panel 10 central region is such as long and the wide square area being 1mm, the touch point being positioned at touch display panel 10 fringe region is such as long and the wide square area being 0.5mm, but the present invention is not as limit, the touch point on described touch display panel 10 also can be long and the wide rectangular area being respectively other size.
Accordingly, such as, the number of the sweep trace 102 that the output terminal a be connected with the sweep trace 102 being positioned at touch display panel 10 edge is connected is 10 to 20, and the number of the sweep trace 102 that the output terminal a be connected with the sweep trace 102 be positioned in the middle part of touch display panel 10 is connected is 25 to 45; The number of the data line 103 that the transmission ends b be connected with the data line 103 being positioned at touch display panel 10 edge is connected is 25 to 35, and the number of the data line 103 that the transmission ends b be connected with the data line 103 be positioned in the middle part of touch display panel 10 is connected is 40 to 60.Thus, improve edge touch-sensing precision.So, for amorphous silicon display panels and low temperature polycrystalline silicon display panels, or, for the touch display panel 10 of different size, may be different from the number scope of the sweep trace 102 that the output terminal a that the sweep trace 102 being positioned at touch display panel 10 edge is connected connects, also may be different from the number scope of the sweep trace 102 that the output terminal a that the sweep trace 102 be positioned in the middle part of touch display panel 10 is connected connects, similarly, number scope for the data line 103 be connected from transmission ends b also may be different, therefore, the present invention does not limit this, just example explanation.
So, in other embodiments, the quantity of the sweep trace 102 that each output terminal a connects can be identical, and the quantity of the data line 103 that each transmission ends b connects can be identical.Such as, each output terminal a connects 25 to 45 sweep traces 102, and each transmission ends b connects 40 to 60 data lines 103.Thus, improve touch-sensing precision.So, for amorphous silicon display panels and low temperature polycrystalline silicon display panels, or, for the touch display panel 10 of different size, may be different from the number scope of the sweep trace 102 that output terminal a connects, similarly, number scope for the data line 103 be connected from transmission ends b also may be different, therefore, the present invention does not limit this, just example explanation.
In addition, export touch-sensing control signal to the effect of at least two sweep traces 102 except reaching above by the mode of the connection number arranging output terminal a and sweep trace 102 simultaneously, but also each output terminal a only connects a sweep trace 102, arranged by software or mode that software and hardware combine, make described touch-sensing control circuit 2011 once or each touch-sensing control signal that simultaneously exports at least two sweep traces 102, and not restricted passage sets the mode that an output terminal a connects at least two sweep traces 102 and realizes.Similarly, but also each data line 103 only connects a transmission ends b, arranged by software or mode that software and hardware combine, make described touch-sensing testing circuit 2013 carry out grouping and calculate to receiving touch-sensing detection signal and be also fine, and not restricted passage set the mode that a transmission ends b connects at least two data lines 103 and realize.
It should be noted that, when performing touch-sensing, described multiple first electrode 101 is divided into many groups, is connected in parallel with each other between multiple first electrodes 101 of same group; So, when performing image display and refreshing, be connected in parallel for non-between described multiple first electrode 101.
Because multiple first electrodes 101 of described touch display unit 1 are divided into many groups, described driving circuit 20 drives first electrode 101 of each group to perform self-capacitance touch-sensing, and therefore, described touch display unit 1 can realize true multiple spot self-capacitance touch-sensing.In addition, different by the first electrode 101 quantity arranging different group, thus correspondence arranges the touch-sensing precision of diverse location on touch display panel 10.
See also Figure 11 and Fig. 3, Figure 11 is the structural representation of the testing circuit of touch-sensing shown in Fig. 3 2013.Described touch-sensing testing circuit 2013 comprises multiple touch-sensing detecting unit 232, secondary signal treatment circuit 233 and multiple processing unit 235.Each touch-sensing detecting unit 232 is connected respectively with secondary signal treatment circuit 233 and a processing unit 235.Described multiple touch-sensing detecting unit 232 connects one to one with described multiple transmission ends b further, or each touch-sensing detecting unit 232 described comprises the node that is used as described transmission ends b respectively.
It should be noted that, in the present embodiment, described touch-sensing testing circuit 2013 comprises a secondary signal treatment circuit 233, and all touch-sensing detecting units 232 share a secondary signal treatment circuit 233.Change ground, in other embodiments, described touch-sensing testing circuit 2013 also can comprise multiple secondary signal treatment circuit 233, and part touch-sensing detecting unit 232 shares a secondary signal treatment circuit 233.In addition, also and each touch-sensing detecting unit 232 non-limiting individually connects a processing unit 235, may also be several touch-sensing detecting unit 232 time-sharing multiplex one processing unit 235.
Described secondary signal treatment circuit 233 is for exporting touch-sensing drive singal to described touch-sensing detecting unit 232.Described touch-sensing detecting unit 232, for exporting touch-sensing drive singal to data line 103, to export to the first electrode 101 further by the gauge tap 104 activated, performs self-capacitance touch-sensing to the first electrode 101.
Described touch-sensing detecting unit 232 receives the touch-sensing detection signal exported from the first electrode 101 further, after carrying out respective handling to described touch-sensing detection signal, (voltage waveform as touch-sensing detection signal is changed, or be voltage swing conversion, or be converted to current waveform for voltage waveform, or electric charge is to the conversion of voltage), and the signal after output processing gives described processing unit 235.Described processing unit 235 is further processed (as analog to digital conversion) the input signal from touch-sensing detecting unit 232, and calculates acquisition touch coordinate.
See also Figure 12, the structural representation of the embodiment that Figure 12 is the detecting unit of touch-sensing shown in Figure 11 232 and processing unit 235.Described touch-sensing detecting unit 232 comprises the first operational amplifier P1, feedback capacity Cf and the 4th K switch 4.Described first operational amplifier P1 comprises in-phase end e1, end of oppisite phase f1 and output terminal g1.Described feedback capacity Cf and the 4th K switch 4 are connected in parallel between described end of oppisite phase e1 and output terminal g1, and described 4th K switch 4, for interval conducting and cut-off on schedule, plays the effect of replacement (Reset) feedback capacity Cf two ends electric charge.Described in-phase end e1 connects secondary signal treatment circuit 233.Described end of oppisite phase f1 connects transmission ends b further, or described end of oppisite phase f1 is used as described transmission ends b further.Described output terminal g1 connection handling unit 235.
When performing touch and detecting, described first operational amplifier P1 is in empty short status, the touch-sensing drive singal that described secondary signal treatment circuit 233 exports exports to data line 103 by in-phase end e1 and end of oppisite phase f1, and then export to the first electrode 101 by the gauge tap 104 activated, drive the first electrode 101 to perform self-capacitance touch-sensing.When there being finger touch the first electrode 101, first electrode 101 exports corresponding touch-sensing detection signal to end of oppisite phase f1 by data line 103, described touch-sensing detection signal, through the charge conversion of feedback capacity Cf or process, correspondingly produces the signal relevant to touch-sensing detection signal at output terminal g1.Wherein, the magnitude relationship between feedback capacity Cf and described hand capacity determines the changes in amplitude size of the signal produced at output terminal g1.
Described processing unit 235 comprises analog to digital signal conversion unit 2351 and computing unit 2355.Described analog to digital signal conversion unit 2351 carries out analog to digital conversion to the signal that the output terminal g1 from touch-sensing detecting unit 232 exports, and exports the digital signal after conversion to described computing unit 2355.Described computing unit 2355 calculates according to described digital signal and obtains touch coordinate.Described computing unit 2355 is connected with a main control chip 3, represents that the signal of touch coordinate is to main control chip 3 for exporting.Described main control chip 3 controls electronic equipment 100 according to the signal correspondence of described expression touch coordinate and performs corresponding function.
It should be noted that, touch-sensing detecting unit shown in Figure 12 232 and processing unit 235 for the structure of one embodiment of the invention and and unrestricted, change ground, in other embodiments, described touch-sensing detecting unit 232 also can be other suitable structure with processing unit 235.Such as, touch-sensing testing circuit 2013 (specific to as described in touch-sensing detecting unit 232 with as described in processing unit 235) in increase corresponding circuit module or clipped circuit module is also fine, or, adopt other circuit module or circuit unit also to realize identical function and be fine equally.Particularly, as, between analog to digital signal conversion unit 2351 and output terminal g1, comprise filter unit further, the signal of described filter unit after carrying out filtering process to the signal that output terminal g1 exports again after output filtering is to analog to digital signal conversion unit 2351.
Again such as, level conversion unit can be set further between described computing unit 2355 and described analog to digital signal conversion unit 2351, the digital signal that described level conversion unit is used for described analog to digital signal conversion unit 2351 exports carries out level conversion, and the digital signal after output level conversion is to computing unit 2355.Described computing unit 2355 calculates according to the digital signal after level conversion and obtains touch coordinate.Again such as, described computing unit 2355 and described level conversion unit transposition, correspondingly, the digital signal after conversion is exported to described computing unit 2355 by described analog to digital signal conversion unit 2351.Described computing unit 2355 calculates according to described digital signal and obtains touch coordinate, and will represent that the signal of touch coordinate exports to level conversion unit, after described level conversion unit carries out level conversion to the signal receiving expression touch coordinate, export to described main control chip 3 again, also be so possible, need to determine according to the withstand voltage situation of computing unit 2355 with analog to digital signal conversion unit 2351.
Referring again to Fig. 3, usually, described driving circuit 20 (similar driving circuit 50 shown in Figure 13 below) comprises Graphics Processing circuit (not shown) and described level conversion unit (not shown) further, described Graphics Processing circuit is used for carrying out relevant treatment (as storage, decompression, color conversion etc.) to the display data from main control chip 3, and the display data after process are exported to data drive circuit 2033 by control circuit 205.Described data drive circuit 2033 changes described display data into corresponding gray scale voltage.Described level shifting circuit is used for carrying out level conversion to some signal in described driving circuit 20, such as, except carrying out except level conversion to the signal of the expression touch coordinate that computing unit 2355 exports, also level conversion may be carried out to the display data that Graphics Processing circuit exports, again output level conversion after display data to control circuit 205, with the request signal transmission between satisfied different voltage holding circuit device.Described display data are preferably digital signal.
Referring again to Figure 12 and Figure 11, described touch-sensing testing circuit 2013 can comprise the 3rd K switch 3 further, and described 3rd K switch 3 is connected between transmission ends b and touch-sensing detecting unit 232.
Described touch-sensing control circuit 2011 provide touch-sensing control signal to sweep trace 102 after, providing before touch-sensing drive singal performs self-capacitance touch-sensing to the first electrode 101, described driving circuit 201 controls the 3rd K switch 3 further and disconnects, and reaches a schedule time to make the first short circuit of the first electrode 101 be connected with same touch-sensing detecting unit 232.
Described driving circuit 20 is after described 3rd K switch 3 disconnection of control reaches the described schedule time, control the 3rd K switch 3 again to close, and provide a predetermined voltage to the first electrode 101 of phase short circuit, after the first electrode 101 of phase short circuit reaches described predetermined voltage, described touch-sensing testing circuit 2013 starts to perform self-capacitance touch-sensing to described first electrode 101.Thus, the effect reducing power consumption can be reached.
Change ground, after described first electrode 101 short circuit reaches a schedule time, also can omit the aforementioned predetermined voltage that provides to the step of the first electrode 101 of phase short circuit, but directly provide touch-sensing drive singal to perform self-capacitance touch-sensing to the first electrode 101.
Such as, described control circuit 205 is for controlling the closed of the 3rd K switch 3 and disconnecting.In addition, described 3rd K switch 3 or be formed on touch display panel 10, or formed in the chips.When being formed on touch display panel 10, described 3rd K switch 3 is such as together formed in (described second substrate 107 is shown in Fig. 6) on the second substrate 107 of touch display panel 10 with gauge tap 104.
Referring again to Fig. 3, described driving circuit 20 comprises the first switch element 208 and second switch unit 209 further.Whether described first switch element 208 is arranged between described data drive circuit 2033 and described a plurality of data lines 103, be electrically connected with described a plurality of data lines 103 for controlling described data drive circuit 2033.Described first switch element 208 comprises multiple first K switch 1, and each data line 103 is connected to described data drive circuit 2033 by one first K switch 1.Whether described second switch unit 209 is arranged between described touch-sensing testing circuit 2013 and described a plurality of data lines 103, be electrically connected with described a plurality of data lines 103 for controlling described touch-sensing testing circuit 2013.Described second switch unit 209 comprises multiple second switch K2, and each data line 103 is connected to described touch-sensing testing circuit 2013 by a second switch K2.
Further, described multiple first K switch 1 such as controls to be close or disconnect by described control circuit 205 with described multiple second switch K2.In addition, the first switch element 208 is with second switch unit 209 or be formed on touch display panel 10, or is formed in the chips.When being formed on touch display panel 10, described first switch element 208, second switch unit 209 are such as together formed in (described second substrate 107 is shown in Fig. 6) on the second substrate 107 of touch display panel 10 with gauge tap 104.
Referring again to Fig. 3, described driving circuit 20 comprises selection circuit 210 further.Described selection circuit 210 is connected to described scan drive circuit 2031, between described touch-sensing control circuit 2011 and described sweep trace 102, is export sweep signal or export touch-sensing control signal to described multi-strip scanning line 102 for selection.
In the present embodiment, described selection circuit 210 comprises multiple or door M.Each or door M comprise first input end h, the second input end i and output terminal j.Described first input end h that is multiple or door M is connected with described scan drive circuit 2031, the second input end i of described multiple or door M is used for being connected with the output terminal a of described touch-sensing control circuit 2011, and output terminal j and the described multi-strip scanning line 102 of described multiple or door M connect one to one.
Described multiple or door M is such as divided into many groups, and at least one group comprises at least two or door M, described at least two or the second input end i of door M be connected to each other, and be connected to an output terminal a.
Change ground, described selection circuit 210 also can comprise the suitable output circuits such as other logic gates, is not limited to described in present embodiment or door M.In addition, similar first switch element 208 is set between described data drive circuit 2033 and described a plurality of data lines 103, second switch unit 209 is set between touch-sensing testing circuit 2013 and described a plurality of data lines 103, also by arranging a switch element between scan drive circuit 2031 and sweep trace 102, the mode of another switch element is set between touch-sensing control circuit 2011 and sweep trace 102, reach and control respectively to be that scan drive circuit 2031 exports sweep signal and exports touch-sensing control signal to the object of sweep trace 102 to sweep trace 105 or touch-sensing control circuit 2011.Preferably, described control circuit 205 is for controlling further to be that scan drive circuit 2031 exports sweep signal and exports touch-sensing control signal to sweep trace 102 to sweep trace 102 or touch-sensing control circuit 2011.
Further, described selection circuit 210 or be formed on touch display panel 10, or formed in the chips.When being formed on touch display panel 10, described selection circuit 210 is such as together formed on the second substrate 107 of touch display panel 10 with gauge tap 104.
Refer to Figure 13, Figure 13 is the part circuit structure schematic diagram of touch display unit 1 one embodiment.In order to clear succinct, give prominence to the key points and compare with the circuit of another embodiment below, the partial circuit of the data drive circuit 2033 and touch-sensing testing circuit 2013 be connected with one group of data line 103 is only shown in Figure 13.Described data drive circuit 2033 comprises the first signal processing circuit 240 and multiple output unit 241.Described first signal processing circuit 240 is for providing gray scale voltage.Each output unit 241 comprises the second operational amplifier P2.Described second operational amplifier P2 comprises in-phase end e2, end of oppisite phase f2 and output terminal g2.Described end of oppisite phase f2 is connected with output terminal g2, and described output terminal g2 is connected to data line 103 further by the first K switch 1, and described in-phase end e2 is connected with the first signal processing circuit 240, for receiving gray scale voltage.
In addition, each data line 103 is connected to the end of oppisite phase f1 of the first operational amplifier P1 further by second switch K2 and the 3rd K switch 3.
When performing image display and refreshing, second switch K2 and the 3rd K switch 3 disconnect, and the first K switch 1 closes, thus, second operational amplifier P2 is electrically connected with data line 103, and the second operational amplifier P2 exports gray scale voltage by data line 103 and performs image display refreshing to the first electrode 101.
When performing touch-sensing, second switch K2 is first closed reaches the schedule time, the first electrode 101 short circuit each other of same group; And then closed the 3rd K switch 3 be connected between each second switch K2 and the first operational amplifier P1, when after closed 3rd K switch 3, such as provide predetermined voltage to charge to the first electrode 101, and then provide touch-sensing drive singal to perform self-capacitance touch-sensing to the first electrode 101.It should be noted that, predetermined voltage also can be provided to discharge to the first electrode 101, and and unrestricted just charging.In addition, described multiple 3rd K switch 3 also can be omitted, correspondingly, aforementioned short circuit first electrode 101 and provide afterwards the step of predetermined voltage also correspondence be omitted, so, be also fine.
Refer to Figure 14, Figure 14 is the part circuit structure schematic diagram of another embodiment of touch display unit 1.With the key distinction of the part circuit structure shown in Figure 13 be: output unit 241 shared operational amplifier of the touch-sensing detecting unit 232 shown in Figure 14 and data drive circuit 2033.Described data drive circuit 2033 comprises the 7th K switch 7 further.Each touch-sensing detecting unit 232 comprises the 5th K switch 5 and the 6th K switch 6 further.First operational amplifier P1 of described touch-sensing detecting unit 232 is the second operational amplifier P2 of time-sharing multiplex data drive circuit 2033.First signal processing circuit 240 connects in-phase end e2 by the 7th K switch 7.Secondary signal treatment circuit 233 connects in-phase end e2 by the 6th K switch 6.Between the output terminal g2 that described 5th K switch 5 is connected to described second operational amplifier P2 and described processing unit 235.Described 3rd K switch 3 is connected between end of oppisite phase f2 and three second switch K2.4th K switch 4 and feedback capacity Cf are connected between end of oppisite phase f2 and output terminal g2.Output terminal g2 is connected with data line 103 by the first K switch 1.
When performing image display and refreshing, described control circuit 205 (see Fig. 3) controls the first K switch 1 conducting, second switch K2 ends, the 3rd K switch 3 ends, the 4th K switch 4 conducting, the 5th K switch 5 is ended, the 6th K switch 6 is ended, the 7th K switch 7 conducting; When performing touch-sensing, described control circuit 205 controls that the first K switch 1 is ended, second switch K2 conducting, the 3rd K switch 3 start conducting after a predetermined time, and the 4th K switch 4 alternate conduction and cut-off, the 5th K switch 5 conducting, the 6th K switch 6 conducting, the 7th K switch 7 are ended.
Due to data drive circuit 2033 and touch-sensing testing circuit 2013 shared operational amplifier, thus cost of products can be saved.
Defining the stage that the first electrode 101 performs self-capacitance touch-sensing is the touch-sensing stage, and defining the first electrode 101, to perform the stage that image display refreshes be the image display refreshing stage.Preferably, the timesharing of described touch display panel 10 realizes the described touch-sensing stage and described image shows the refreshing stage.
Referring again to Fig. 3, the principle of work of described touch display unit 1 is as follows:
Described driving circuit 20 is connected by wire as follows with described multiple first electrode 101: show the refreshing stage at image, described multiple first electrode 101 is electrically connected to described display driver circuit 203, receive the gray scale voltage from display driver circuit 203, refresh in order to perform image display; In the touch-sensing stage, described multiple first electrode 101 is electrically connected to described touch driving circuit 201, receives the touch-sensing drive singal from touching driving circuit 201, in order to perform self-capacitance touch-sensing.
Such as, in one embodiment, same first electrode 101 non-concurrent electrical connection touches the touch-sensing testing circuit 2013 in driving circuit 201 and the data drive circuit 2033 in display driver circuit 203.Further, same first electrode 101 simultaneously or non-concurrent be electrically connected touch-sensing control circuit 2011 in described touch driving circuit 201 and the scan drive circuit 2031 in display driver circuit 203.
Particularly, in a touch-sensing stage, described touch driving circuit 201 provides touch-sensing drive singal to part first electrode 101, described part first electrode 101 is driven to perform self-capacitance touch-sensing, until provide touch-sensing drive singal by multiple touch-sensing stage of carrying out successively to all first electrodes 101, self-capacitance touch-sensing is carried out to all first electrodes 101; And
After each touch-sensing stage terminates, the first electrode 101 that described display driver circuit 203 provides gray scale voltage to terminate to the touch-sensing stage, drives the first electrode 101 to refresh to perform image display.
Touch-sensing stage and image show the refreshing stage and such as hocket.
When touch display panel 10 performs touch-sensing, described touch driving circuit 201 such as once drives at least two row first electrodes 101 to perform self-capacitance touch-sensing simultaneously.Further, described touch driving circuit 201 can be drive at least two row first electrodes 101 to perform self-capacitance touch-sensing at every turn simultaneously.Wherein, described at least two behavior adjacent lines or different rows, when described at least two behavior different rows, as being odd-numbered line or even number line.
In addition, for a touch-sensing stage, described touch driving circuit 201 can be once drive multirow first electrode 101 to perform self-capacitance touch-sensing simultaneously, also can be point several times, each multirow first electrode 101 that simultaneously drives performs self-capacitance touch-sensing.For dividing several times, drive multirow first electrode 101 to perform this situation of self-capacitance at every turn simultaneously, described the first electrode 101 driven several times is the first electrode 101 of sequential, does not have overlap each other, so, change ground, the first electrode 101 of adjacent twice driving also can overlap.In addition, also once can drive a line first electrode 101, not restriction at least two row first electrodes 101.
When touch display panel 10 performs image display refreshing, described display driver circuit 203 drives the first electrode 101 to perform image display line by line to refresh.
Further, in one embodiment, described driving circuit 20, for carrying out interlacing display refresh scan to described multiple first electrode 101 and interlacing touches and scan, realizes image and shows refreshing and touch-sensing.Thus the display refreshing frequency of described driving circuit 20 to described touch display panel 10 is identical with touch-sensing frequency, such as, be 120 hertz (HZ).It should be noted that, such as, select to do by the conversion of progressive-to-interlace display data in advance in control circuit 205.
In order to more cheer and bright, the procedure declaration performing image display refreshing and touch-sensing to described touch display panel 10 for an example is as follows:
1. the first electrode 101 has shown; Such as, the display of former frame picture is complete, starts next frame below;
2. the touch-sensing stage starts in advance, short circuit even number line the 2nd row, the 4th row ..., the 52nd row the first electrode 101, and after short circuit reaches the schedule time, by the 2nd row, the 4th row ..., the 52nd row the first electrode 101 receive predetermined level;
3. start dual numbers row the 2nd row, the 4th row ..., the 52nd row the first electrode 101 perform self-capacitance touch-sensing;
4. pair to execute the 2nd row of self-capacitance touch-sensing, the 4th row ..., the 52nd row the first electrode 101 carry out display refresh;
5. next touch-sensing stage starts in advance, short circuit even number line the 54th row, the 56th row ..., the 106th row the first electrode 101, and after short circuit reaches the schedule time, by the 54th row, the 56th row ..., the 106th row the first electrode 101 receive predetermined level;
6. start dual numbers row the 54th row, the 56th row ..., the 106th row the first electrode 101 perform self-capacitance touch-sensing;
7. pair to execute the 54th row of self-capacitance touch-sensing, the 56th row ..., the 106th row the first electrode 101 carry out display refresh;
According to above-mentioned steps, complete and the touch-sensing of the first electrode 101 of all even number lines and display are refreshed, next, similarly, then complete the touch-sensing of the first electrode 101 of all odd-numbered lines is refreshed with showing.
Change ground, the scanning sequence of odd-numbered line and even number line can be put upside down.
So, touch scanning of the present invention is not limited to above-mentioned steps with display refresh scan, also can do other to change, such as, between the adjacent two touch-sensing stages, after completing the display refreshing to the first electrode 101 performing the last touch-sensing stage, next touch-sensing stage can be started immediately, also after can carrying out display refreshing to other the first electrode 101, then next touch-sensing stage is started.
In addition, after also can completing self-capacitance touch-sensing to the first electrode 101 of all idols (very) number row, then display refreshing is performed to the first electrode 101 of all even number lines; Afterwards, to odd (idol) number row first electrode 101 perform self-capacitance touch-sensing with display refresh.
Further, after also can completing self-capacitance touch-sensing to all first electrodes 101, then perform display refreshing.
Referring again to Fig. 1, described electronic equipment 100 comprises main control chip 3 further, and in addition, Figure 12 also shows described main control chip 3.Described main control chip 3 is connected with described touch display unit 1.Described main control chip 3 is for carrying out data communication with described touch display unit 1.Described main control chip 3 is also further used for providing supply voltage to described touch display unit 1.Described main control chip 3 can be one chip, also can be a chipset.When main control chip 3 is chipset, described chipset comprises application processor (ApplicationProcessor, AP) and power supply chip.In addition, described chipset can comprise storage chip further.Further, described application processor also can be central processing unit (CentralProcessingUnit, CPU).
Described main control chip 3 comprises earth terminal 33, and described earth terminal 33 connection device ground, the ground signalling on receiving equipment ground, ground signalling represents with GND at Fig. 1.Described equipment ground is also known as systematically, and be such as the negative pole of the power supply of electronic equipment 100, power supply is as being battery.Described ground signalling GND is also known as systematically voltage, systematically signal, equipment ground voltage or equipment earth signal etc.Described ground signalling GND is constant voltage, and as the voltage reference of circuit each in electronic equipment 100, described ground signalling GND is such as the voltage signals such as 0V (volt), 2V, (-1) V.Usually, described equipment ground not earth ground or definitely greatly.So, when electronic equipment 100 is connected with earth ground by conductor, described equipment ground also may be earth ground.
Described driving circuit 20 comprises the first earth terminal 251 and the second earth terminal 253 be connected further.Described second earth terminal 253 is connected with described earth terminal 33.
Described touch display panel 10 comprises ground wire 112 further, and described ground wire 112 is connected with described first earth terminal 251.So, change ground, described ground wire 112 also directly can be connected with equipment ground or earth terminal 33 or the second earth terminal 253.
When described touch display unit 1 is when performing image display and refreshing with touch-sensing, described ground wire 112 all receives ground signalling GND.
In the respective embodiments described above, described electronic equipment 100 is for voltage reference with a territory.The territory that described territory is is benchmark with ground signalling GND.
Refer to Figure 15, Figure 15 is the structural representation of the another embodiment of electronic equipment of the present invention.Described electronic equipment 400 is optional substantially identical with the structure of described electronic equipment 100, as, the structure example of touch display panel 40 and touch display panel 10 is as identical or similar, main control chip 6 is such as identical or similar with the structure & working mechanism of main control chip 3, annexation between driving circuit 50 with main control chip 6 and the annexation between driving circuit 20 and main control chip 3 are such as identical or similar, and the annexation between driving circuit 50 with touch display panel 40 and the annexation between driving circuit 20 and touch display panel 10 are such as identical or similar.
Described electronic equipment 400 is with the key distinction of described electronic equipment 100: the driving circuit 50 of the touch display unit 4 of described electronic equipment 400 is different with the structure & working mechanism of the driving circuit 20 of the touch display unit 1 of described electronic equipment 100, when touch display panel 40 performs touch-sensing, described driving circuit 50 exports to the signal of touch display panel 40 by overall uniform modulation, to improve signal to noise ratio (S/N ratio).
Particularly, described driving circuit 50 is compared driving circuit 20 and is comprised modulation circuit 506 further.Described modulation circuit 506 is for generation of modulation signal, and described modulation signal touches for modulating the input signal that driving circuit 501 is supplied to touch display panel 40.Described input signal changes with the change of described modulation signal.In the present embodiment, described input signal raises with the rising of described modulation signal, reduces with the reduction of described modulation signal.So, change ground, in other embodiments, the variation relation between described input signal and modulation signal also can be other suitable variation relation.
Owing to adopting modulation technique scheme, except newly-increased above-mentioned modulation circuit 506, in described driving circuit 50, also correspondence increases some circuit relevant to modulation circuit 506 or element newly, in addition, it is corresponding in described driving circuit 50 that to also have some circuit structures to compare the circuit structure realizing same or similar function in driving circuit 20 different, from knowing these information to the description of this embodiment below.
It should be noted that, described electronic equipment 400 have employed different labels from same or similar structure in described electronic equipment 100, and such as, touch display panel 10 is identical or similar with touch display panel 40 structure, but have employed different labels; Driving circuit 50 also uses different labels etc. with same or similar circuit in driving circuit 20, herein just in order to allow label seem to have more logicality, more regular, and and the structure that indicates of non-limiting different labels is different.Correspondingly, this is no longer going to repeat them for the structure that described electronic equipment 400 is identical with aforementioned electronic devices 100.Below the main difference part of electronic equipment 400 and electronic equipment 100 is described.Similarly, the electronic equipment 700,900 be also suitable for below noted earlier.
Described input signal comprise described touch-sensing control signal, touch-sensing drive singal, the second common electric voltage, with the 3rd common electric voltage.
Described touch-sensing control signal, described touch-sensing drive singal, the second common electric voltage are such as corresponding identical with the changes in amplitude size of described modulation signal with the changes in amplitude size of the 3rd common electric voltage.
Described touch-sensing control signal, described touch-sensing drive singal, the second common electric voltage and the 3rd common electric voltage are such as all with the same frequency of width with described modulation signal and the phase place of the relative described modulation signal of phase place of described touch-sensing control signal, described touch-sensing drive singal, the second common electric voltage and the 3rd common electric voltage all has certain delay.
In the present embodiment, described modulation signal is periodically variable square-wave pulse signal.So, in other embodiments, described modulation signal also can be the signal of aperiodicity change, in addition, also can be other suitable waveform signal such as sine wave or trapezoidal wave.
In the present embodiment, in the touch-sensing stage, described modulation circuit 506, by modulating the ground of partial circuit touched in driving circuit 501 and the ground of touch display panel 40, reaches and carries out overall uniform modulation to the input signal of touch display panel 40.So, change ground, in other embodiments, described modulation circuit 506 also can in touch driving circuit 501 all the ground of circuit and the ground of touch display panel 40 modulate, to this, after have related description.
Relatively, in the image display refreshing stage, the ground of described display driver circuit 503 and the ground of touch display panel 40 are not modulated, all reception ground signalling GND.
More specifically, described driving circuit 50 comprises voltage generation circuit 51, multiple Signal transmissions end 551 and the first power end 554 further.Wherein, described voltage generation circuit 51 connects modulation circuit 506, for providing drive singal to described modulation circuit 506.Described modulation circuit 506 is connected between the first earth terminal 552 and the second earth terminal 553 further.Described first earth terminal 552 is connected with described ground wire 412 further.Described Signal transmissions end 551 is connected respectively with public voltage generating circuit 507, first switch element 508, selection circuit 510 and second switch unit 509, for export gray scale voltage to the first electrode 401, export touch-sensing control signal to sweep trace 402, export touch-sensing drive singal to the first electrode 401, export the first common electric voltage or the second common electric voltage or the 3rd common electric voltage to the second electrode 405 and receive the touch-sensing detection signal exported from the first electrode 401.It should be noted that, described Signal transmissions end 551 comprises output terminal a as the driving circuit 20 of aforementioned electronic devices 100 and transmission ends b.
Main control chip 6 comprises power supply end 61 and earth terminal 63.Described earth terminal 63 is connected with described equipment ground, the second earth terminal 553.Described power supply end 61 is connected with described first power end 554.Communication interface (sign) is provided with further, to carry out information communication between described main control chip 6 and described driving circuit 50.
Described main control chip 6 gives described first power end 554 by described power supply end 61 output supply voltage.Described earth terminal 63 and described second earth terminal 553 all receive the ground signalling GND from equipment ground.
In the touch-sensing stage, described modulation circuit 506 is the corresponding modulation signal (representing with MNGD in fig .15) that produces according to the ground signalling GND on the second earth terminal 553 and the drive singal of described voltage generation circuit 51, and exports described modulation signal MGND to the first earth terminal 552.Described first earth terminal 552 exports described modulation signal MNGD to described ground wire 412.Described drive singal is such as higher than described ground signalling GND.Such as, described ground signalling GND is 0V, and described drive singal is 2V.So, described ground signalling is 0V, described drive singal be 2V is an example, and can do the adjustment of respective amplitude according to the situation of product, the present invention does not limit this.When being defined in touch-sensing, load the ground (comprising the first earth terminal 552 and ground wire 412) of described modulation signal MGND for modulation ground, to distinguish the equipment ground loading ground signalling GND.Change ground, in other embodiments, described modulation circuit 506 also directly can export modulation signal MGND to ground wire 412, and and unrestrictedly necessarily export modulation signal MGND to ground wire 412 by the first earth terminal 552.
Correspondingly, in the touch-sensing stage, described electronic equipment 400 is for voltage reference with two territories.Two territories are shown as with the ground signalling GND territory 480 that is benchmark and the territory 490 that is benchmark with modulation signal MGND.Wherein, the earth terminal all directly connection device ground of the circuit in the territory 480 being benchmark with ground signalling GND, the earth terminal of the circuit in the territory 490 being benchmark with modulation signal MGND all directly connects modulation ground.Further, for be the circuit on ground with modulation, its ground reference is the modulation signal MGND that loads of modulation ground; For being the circuit on ground with equipment, its ground reference is the ground signalling GND that loads of equipment ground.
That is, in the touch-sensing stage, modulation ground is modulated to modulation signal MGND by ground signalling GND, and the equal modulated signals MGND of all signals being reference data with the modulation signal MGND loaded with modulating is modulated.
Further, in the image display refreshing stage, modulation ground (552,412) is electrically connected to and the second earth terminal 553 of being connected of equipment ground by the first active switch 561 (in conjunction with Figure 15 and Figure 16), this stage, second active switch 563 is in cut-off state, correspondingly, when image display refreshes, described modulation circuit 506 exports ground signalling GND to described first earth terminal 552 and ground wire 412.Alternatively, described modulation circuit 506 continues to export ground signalling GND to described first earth terminal 552 and ground wire 412.That is, when image display refreshes, described electronic equipment 400 is actually the territory 480 that employing take GND as benchmark.
Referring again to Figure 15, described driving circuit 50 comprises Graphics Processing circuit 504 and level conversion unit 5353 further.Described Graphics Processing circuit 504 is connected with described main control chip 6, for carrying out respective handling (e.g., compression, storage, decompression, color conversion etc.) to the display data from main control chip 6.Described level conversion unit 5353 is arranged between described Graphics Processing circuit 504 and control circuit 505, carry out level conversion for the display data after processing described Graphics Processing circuit 504, and the display data after output level conversion give described control circuit 505.Described control circuit 505 export corresponding display according to this and clock signal give described display driver circuit 503.Described display driver circuit 503 conversion receiver to display data be gray scale voltage, and according to described clock signal by the first switch element 508 export gray scale voltage give corresponding first electrode 101 perform image display refresh.Described display data are preferably digital signal.
It should be noted that, when not adopting the scheme on modulation ground, if when the signal between Graphics Processing circuit 504 and described control circuit 505 does not need level conversion, then between Graphics Processing circuit 504 and control circuit 505 without the need to arranging level conversion unit, but, in modulation ground technical scheme, because territory 480 is different from the voltage reference in territory 490, so need level conversion be done.
Described level conversion unit 5353 is arranged between computing unit 5355 and analog to digital signal conversion unit 5351 further, digital signal for exporting analog to digital signal conversion unit 5351 carries out level conversion, and the digital signal after output level conversion obtains touch coordinate to computing unit 5355.
In the present embodiment, to circuit module each in driving circuit 50 or circuit unit in the dividing condition in two territories 480,490 be: touch-sensing control circuit 5011, selection circuit 510, touch-sensing detecting unit 532, secondary signal treatment circuit 533, analog to digital signal conversion unit 5351, the 3rd K switch 3, second switch unit 509, control circuit 505, display driver circuit 503, first switch element 508, public voltage generating circuit 507 and touch display panel 40 are all divided in MGND be benchmark territory 490 in; Modulation circuit 506, Graphics Processing circuit 504, computing unit 5355 and voltage generation circuit 51 are all divided in GND be benchmark territory 480 in; Level conversion unit 5353 is across two territories, namely, a part is in territory 480, a part is in territory 490, for one of ordinary skill in the art, it is to determine that level conversion unit 5353 lays respectively at territory 480 and the part in territory 490 according to the record of the application and circuit theory, repeats no more this herein.
About indicating the circuit module of same names or the concrete structure of circuit unit and annexation each other in driving circuit 50 with driving circuit 20, function repeats no more, specifically see aforementioned driving circuit 20 herein.In addition, a part for touch-sensing testing circuit (sign) is only shown in Figure 15, in fact, touch-sensing testing circuit comprises multiple touch-sensing detecting unit 532, multiple 3rd K switch 3, multiple analog to digital signal conversion unit 5351 and multiple computing unit 5355.Corresponding that is known see aforementioned touch sensing testing circuit 2013.
It should be noted that, the fractionation scheme of the aforementioned control chip 71 that the division in two territories 480,490 mainly will disclose after correspondence to circuit module each in driving circuit 50 or circuit unit and driving chip 73, to save manufacturing cost, specifically see the electronic equipment 700 (see Figure 25) of subsequent implementation mode.
Change ground, the present invention can comprise multiple situation to driving circuit 50 in the dividing mode in above-mentioned two territories 480,490, be not limited to described in above-mentioned embodiment, such as, in other embodiments, control circuit 505, display driver circuit 503, analog to digital signal conversion unit 5351 also can be arranged in territory 480.
Again such as, computing unit 5355 also can be arranged in territory 490.It should be noted that, when computing unit 5355 is arranged in territory 490 and the digital signal that analog to digital signal conversion unit 5351 exports to computing unit 5355 needs to carry out level conversion, also can be arranged on completely in territory 490 for this part level conversion unit described digital signal being carried out to level conversion.Correspondingly, as previously mentioned, described modulation circuit 506 in touch driving circuit 501, all modulate by the ground of circuit and the ground of touch display panel 40.
Need to further illustrate, the signal outputting to territory 490 from territory 480 can be modulated by modulated signals MGND, and accordingly, the signal outputting to territory 480 from territory 490 also can be carried out corresponding modulation, e.g., and the modulation etc. contrary with modulation signal MGND.
Due to the overall uniform modulation of the input signal modulated signals MGND of described touch display panel 40 when performing touch-sensing, thus, the signal to noise ratio (S/N ratio) of touch display unit 4 can be improved, and then improve touch-sensing precision.
Refer to Figure 16, the schematic diagram of the embodiment that Figure 16 is modulation circuit 506 shown in Figure 15.Described modulation circuit 506 comprises the first active switch 561, second active switch 563 and control module 565.Wherein, the first active switch 561 comprises control end G1, the first transmission ends S1 and the second transmission ends S2, and the second active switch 563 comprises control end G2, the first transmission ends S3 and the second transmission ends S4.Described control end G1, G2 are all connected with control module 565.Second transmission ends S2 of the first active switch 561 is connected with the first transmission ends S3 of the second active switch 563 and on connecting line, defines an output node N, first transmission ends S1 of the first active switch 561 receives the first reference signal, second transmission ends S4 of the second active switch 563 receives the second reference signal, described control module 565 alternately exports described first reference signal and described second reference signal, to form modulation signal by controlling described first, second active switch 561,563 corresponding control described output node N.
In the present embodiment, described first reference signal is ground signalling, and described second reference signal is drive singal.Correspondingly, described second transmission ends S4 is connected with described voltage generation circuit 51, and described first transmission ends S1 is connected with the second earth terminal 553, and described node N is connected with the first earth terminal 552.
Described first active switch 561 and the second active switch 563 are as being thin film transistor (TFT), triode, metal oxide semiconductor field effect tube.
The principle of work of described modulation circuit 506 is: in the touch-sensing stage, and described control module 565 exports modulation signal MGND to the first earth terminal 552 for controlling described modulation circuit 506; In the image display refreshing stage, described control module 565 exports ground signalling GND to the first earth terminal 552 for controlling described modulation circuit 506.
It should be noted that, described first reference signal and the second reference signal are not limited to described in present embodiment, the voltage condition of described first reference signal and the second reference signal can be in following five kinds of situations any one:
The voltage of the first: the first reference signal is positive voltage, and the voltage of the second reference signal is 0V;
The voltage of the second: the first reference signal is 0V, and the voltage of the second reference signal is negative voltage;
The voltage of the three: the first reference signal is positive voltage, and the voltage of the second reference signal is negative voltage, and the absolute value of the voltage of described first reference signal equals or is not equal to the absolute value of voltage of described second reference signal;
Positive voltages different sized by the voltage of the four: the first reference signal, the second reference signal;
Negative voltages different sized by the voltage of the five: the first reference signal, the second reference signal.
Described first reference signal, the second reference signal are such as constant voltage signal.Described modulation signal is the periodically variable square-wave signal that the first reference signal and the second reference signal alternately occur.
In addition, the circuit structure of described modulation circuit 506 also and described in unrestricted above-mentioned embodiment, also can be the circuit structure that other is suitable.
What needs further illustrated is, for touch display unit 1, electronic equipment 100 only has a reference field being benchmark with ground signalling GND, and the principle of described touch driving circuit 201 when driving described touch display panel 10 to perform touch-sensing is self-capacitance touch-sensing principle; For touch display unit 4, electronic equipment 400 has a reference field being benchmark with modulation signal MGND with the ground signalling GND reference field that is benchmark and, and the principle of described touch driving circuit 501 when driving described touch display panel 40 to perform touch-sensing is also self-capacitance touch-sensing principle.
When electronic equipment 400 adopt with GND and MGND be benchmark two territories 480,490 time, not only the input signal of touch display panel 40 is made signal to noise ratio (S/N ratio) be improved by overall uniform modulation, and some circuit structure that described touch driving circuit 501 is in territory 490 correspondingly also can be simplified, and then also can simplify circuit structure, save cost of products.Such as, be described for secondary signal treatment circuit 233,533.
Refer to Figure 17 and Figure 18, Figure 17 is that electronic equipment 100 is when only adopting one to take GND as the territory of benchmark, the electrical block diagram of one embodiment of described secondary signal treatment circuit 233, Figure 18 be electronic equipment 400 adopt with GND and MGND be benchmark two territories 480,490 time, the electrical block diagram of an embodiment of described secondary signal treatment circuit 533.Secondary signal treatment circuit 233 comprises current sources la, resistance Ra, the first K switch 1a, second switch K2a.Wherein, current sources la and resistance Ra are connected in series between power end VDD1 and equipment ground GND.One end of first K switch 1a is connected between current sources la and resistance Ra, and the other end is connected to in-phase end e1.One end of second switch K2a is connected between the first K switch 1a and in-phase end e1, and the other end is connected to the equipment ground for loading ground signalling GND.By controlling the alternate conduction of the first K switch 1a and second switch K2a, the corresponding touch-sensing drive singal that produces is to in-phase end e1.Wherein, described power end VDD1 keeps constant relative to described equipment ground GND.Wherein, described power end VDD1 is such as the first power end 554, but is not limited to described first power end 554, also can be the power end that other is suitable.
Relatively, secondary signal treatment circuit 533 comprises current source Ib and resistance Rb, and described current source Ib and resistance Rb is connected in series between power end VDD2 and the modulation ground for load-modulate signal MGND.Described in-phase end e1 is connected between described current source Ib and resistance Rb.Wherein, described power end VDD2 is such as aftermentioned second source end 555.Because described modulation modulation signal MGND is on the ground change, therefore, output voltage between power end VDD2, described current source Ib and resistance Rb all changes with the change of modulating modulation signal MGND on the ground, thus the corresponding touch-sensing drive singal that produces is to in-phase end e1.In addition, also can such as modulate ground MGND and power end VDD2 between increase electric capacity, carry out the stability of holding signal.
Compared to secondary signal treatment circuit 233, the structure of secondary signal treatment circuit 533 becomes simple, and the touch-sensing drive singal that the touch-sensing drive singal that produces of secondary signal treatment circuit 533 produces compared to secondary signal treatment circuit 233 will be stablized.
Referring again to Figure 15, described driving circuit 50 comprises slope controller 55 further.Described slope controller 55 is connected with described modulation circuit 506, for controlling the slope of the modulation signal that described modulation circuit 506 exports, to reduce electromagnetic interference (EMI) (EMI).Separately, described slope controller 55 be such as arranged on GND be benchmark territory 480 in.
Referring again to Figure 15; in the present embodiment; a part due to described driving circuit 50 is in the territory 480 taking GND as benchmark; a part is in the territory 490 taking MGND as benchmark; therefore, the possibility of the current flowing backwards in territory 490 to territory 480 may be had, in order to prevent this phenomenon; described electronic equipment 400 comprises protection circuit 53 further, and described protection circuit 53 is arranged between territory 480 and territory 490.
Particularly, described driving circuit 50 comprises second source end 555 further in described territory 490.Described protection circuit 53 is arranged between described first power end 554 and second source end 555.When described modulation signal MGND is drive singal, described protection circuit 53 correspondence disconnects the connection between described first power end 554 and described second source end 555; When described modulation signal MGND is ground signalling GND, the closed connection between described first power end 554 and described second source end 555 of described protection circuit 53 correspondence.
Refer to Figure 19, Figure 19 is the circuit diagram of protection circuit 53.In the present embodiment, described protection circuit 53 comprises diode D1.The anode of described diode D1 connects the first power end 554, and the negative electrode of described diode D1 connects second source end 555.
Preferably, described protection circuit 53 comprises the first electric capacity C1 and the second electric capacity C2 further.Wherein, between the anode that described first electric capacity C1 is connected to described diode D1 and the equipment ground being loaded with ground signalling GND, between the negative electrode that described second electric capacity C2 is connected to described diode D1 and the modulation ground being loaded with modulation signal MGND.Wherein, described first electric capacity C1 and diode D1 is arranged in territory 480, and described second electric capacity C2 is arranged in territory 490.
Described in described protection circuit 53 unrestricted above embodiment, e.g., refer to Figure 20, Figure 20 is the structural representation of another embodiment of protection circuit 53.In order to the protection circuit shown in the protection circuit 53, Figure 20 shown in clear difference Figure 19 is denoted as 53a.Described protection electric capacity 53a comprises the 3rd active switch 571 and control module 573.Described 3rd active switch 571 comprises control end G3, the first transmission ends S5 and the second transmission ends S6.The control end G3 of described 3rd active switch 571 connects described control module 573, and described first transmission ends S5 connects described first power end 554, and described second transmission ends S6 connects described second source end 555.When described modulation signal MGND is drive singal, described control module 573 controls described 3rd active switch 571 to be ended, and described protection circuit 53a correspondence disconnects the connection between described first power end 554 and described second source end 555; When described modulation signal MGND is ground signalling GND, described control module 573 controls described 3rd active switch 571 conducting, the closed connection between described first power end 554 and described second source end 555 of described protection circuit 53a correspondence.Described 3rd active switch 571 is as being thin film transistor (TFT), triode, metal oxide semiconductor field effect tube.
In addition, preferably, described protection circuit 53a comprises the first electric capacity C1 and the second electric capacity C2 further.Wherein, the first electric capacity C1 is connected between the first transmission ends S5 and the equipment ground being loaded with ground signalling GND, and described second electric capacity C2 is connected between the second transmission ends S6 and the modulation ground being loaded with ground signalling MGND.
Especially it should be noted that, when performing touch-sensing, adopting this technical scheme on modulation ground to be also suitable for the structure of the touch display panel of other suitable type, and being not limited to the structure of described touch display panel 40.Such as, self-capacitance touch screen (sign) as shown in figure 21, described self-capacitance touch screen comprises multiple first electrode 401, each first electrode 401 is connected with driving circuit (sign) respectively by an independent data line 403, namely, save the gauge tap 404 in touch display panel 40 shown in Figure 15 and sweep trace 402, but need the quantity increasing data line 403, each first electrode 401 individually connects a data line 403, in addition, the size of the first electrode 401 becomes large, so, adopt the scheme on modulation ground can improve the sensing precision of the touch display unit comprising described self-capacitance touch display screen too.
Change ground, in other embodiments, described modulation circuit 506, also by modulating the power supply in driving circuit 50 or reference power source, reaching and carrying out overall uniform modulation to the input signal of touch display panel 40, and and unrestrictedly to modulate equipment.Such as, described modulation circuit 506 is modulated terminal for exporting one end of modulation signal.Described modulated terminal, except connecting or be used as (when modulating ground) except aforementioned first earth terminal 552, also can connect or be used as aforementioned second source end 555 (when modulating power supply).When connecting or be used as described second source end 555, described modulation circuit 506 is connected between the first power end 554 and second source end 555.Described second source end 555 relative to the first earth terminal 552, also referred to as power supply end, the two voltages keep constant loaded.
In addition, except described second source end 555 and described first earth terminal 552, driving circuit 50 generally includes reference power source end (not shown), when second source end 555 is for loading the first supply voltage, when first earth terminal 552 is for loading second source voltage, described reference power source end is for loading the 3rd supply voltage, the height of described 3rd supply voltage is between described first supply voltage and the height of second source voltage, wherein, the pressure reduction of described first supply voltage and second source voltage keeps constant, the pressure reduction of described first supply voltage and the 3rd supply voltage keeps constant.Described reference power source end also can be used as or connects described modulated terminal.That is, described power supply end, reference power source end and the one in the first earth terminal three are used as or are connected described modulated terminal, accordingly, to be used as or the supply voltage that connects described modulated terminal comprises modulation signal.
Correspondingly, in the image display refreshing stage, described modulated terminal loads a constant voltage, and described driving circuit 50 provides gray scale voltage to described multiple first electrode 401 by Signal transmissions end 551, drives described first electrode 401 to perform image display; In the touch-sensing stage, described modulated terminal load-modulate signal, described driving circuit 50 provides touch-sensing drive singal to described multiple first electrode 401 by Signal transmissions end 551, described first electrode 401 is driven to perform self-capacitance touch-sensing, wherein, described touch-sensing drive singal raises with the rising of described modulation signal, reduces with the reduction of described modulation signal.
Described control module 565 (see Figure 16) exports described constant voltage to modulated terminal for refreshing modulation circuit 506 described in stage control in image display; Described in touch-sensing stage control, modulation circuit 506 exports modulation signal to modulated terminal.
Refer to Figure 22, Figure 22 is the structural representation of public voltage generating circuit 507.Described public voltage generating circuit 507 comprises the first circuit 5071, second circuit 5072 and tertiary circuit 5073.Wherein, described first circuit 5071 is for generation of the first common electric voltage, and described second circuit 5072 is for generation of the second common electric voltage, and described tertiary circuit 5073 is for generation of the 3rd common electric voltage.The earth terminal of described first circuit 5071 is connected between described modulation circuit 506 and the first earth terminal 552.The earth terminal of described second circuit 5072 is connected between described modulation circuit 506 and the first earth terminal 552.The earth terminal of described tertiary circuit 5073 is connected between described modulation circuit 506 and the first earth terminal 552.
In the image display refreshing stage, described first circuit 5071 is electrically connected with described second electrode 405 further, there is provided the first common electric voltage to the second electrode 405, it should be noted that, although the earth terminal of described first circuit 5071 is connected between described modulation circuit 506 and the first earth terminal 552, this stage modulation circuit 506 only exports ground signalling GND to the first earth terminal 552; Be in bright screen duty in the touch-sensing stage at touch display unit 4, described second circuit 5072 is electrically connected with described second electrode 405 further, provide the second common electric voltage to described second electrode 405; Blank screen holding state is at touch display unit 4 in the touch-sensing stage, described tertiary circuit 5073 is electrically connected with described second electrode 405, there is provided the 3rd common electric voltage to described second electrode 405, it should be noted that, in the touch-sensing stage, modulation circuit 506 exports modulation signal MGND to the first earth terminal 552.
When the first common electric voltage is constant voltage, correspondingly, described first circuit 5071 can be same circuit with second circuit 5072.Because when image display refreshes, the first actual connection device ground of circuit 5071, and modulation ground is connected when touch-sensing, thus, when image display refreshes, the first circuit 5071 exports constant first common electric voltage, and when touch-sensing, described constant first common electric voltage modulated signal MGND modulates and correspondence becomes the second common electric voltage of change, and the pressure reduction between the second common electric voltage and described touch-sensing drive singal remains unchanged.So, second circuit 5072 can be saved.
Similarly, described tertiary circuit 5073 is preferably same circuit with described secondary signal treatment circuit 533.So, tertiary circuit 5073 is saved further.
Referring again to Figure 22, described public voltage generating circuit 507 comprises the 8th K switch 8, the 9th K switch 9 and the tenth K switch 10 further, first circuit 5071 is connected with the second electrode 405 by the 8th K switch 8, second circuit 5072 is connected with the second electrode 405 by the 9th K switch 3, and tertiary circuit 5073 is connected with the second electrode 405 by the tenth K switch 10.By whether controlling the conducting of the 8th K switch 8, the 9th K switch 9 and the tenth K switch 10, carrying out corresponding control is export which common electric voltage to the second electrode 405.
Change ground, described second common electric voltage also can be modulation signal, and correspondingly, described second circuit 5073 comprises the 9th K switch 9, is connected between the second electrode 405 and the first earth terminal 552.
When the first circuit 5071 and second circuit 5072 are same circuit, correspondingly, the switch in the 8th K switch 8 and the 9th K switch 9 can be saved.
Refer to Figure 23, Figure 23 is the annexation figure between second circuit 5072 and the second electrode 405.Described second circuit 5072 comprises impact damper R, is connected between the second electrode 405 and the first earth terminal 552.
Preferably, described second circuit 5072 comprises multiple impact damper R, is connected to positions different between the second electrode 405 from the first earth terminal 552.As, be equally spaced distributed in the surrounding of the second electrode 405, so, be not limited at equal intervals.Thus, ensure the stable of the second common electric voltage.It should be noted that, in the present embodiment, other element is not connected between impact damper R with the first earth terminal 552, so, change ground, in other embodiments, be connected with voltage generation circuit between described impact damper R and the first earth terminal 552, the voltage that described voltage generation circuit produces raises with the rising of modulation signal MGND, reduces with the reduction of modulation signal MGND.
Similarly, the first circuit 5071, tertiary circuit 5073 also can include multiple impact damper R, and are connected to positions different between the second electrode 405 from the first earth terminal 552.
Please consult Figure 15 and Figure 24 in the lump again, Figure 24 is the structural representation of the Graphics Processing circuit 504 shown in Figure 15.Described Graphics Processing circuit 504 comprises compressor circuit 5035, memory circuit 5037, decompression circuit 5038 and color conversion circuit 5039.Described compressor circuit 5035, memory circuit 5037, decompression circuit 5038 are connected successively with color conversion circuit 5039.Described compressor circuit 5035 connects described main control chip 6 further by a high-speed interface 5040.Described color conversion circuit 5039 connects described control circuit 505 further by level conversion unit 5353.
Described compressor circuit 5035, for being received the display data from main control chip 6 by high-speed interface 5040, carry out compression process, and the display data after output squeezing is to memory circuit 5037 to the display data received.Display data after described memory circuit 5037 output squeezing are to decompression circuit 5038.Described decompression circuit 5038 to receiving display according to decompressing, and exports the display data after decompressing to color conversion circuit 5039.Described color conversion circuit 5039 is to receiving display according to carrying out color conversion process, and as Gamma corrects, and the display data exported after conversion are to level conversion unit 5353.After described level conversion unit 5353 carries out level conversion to the display data received, and the display data after output level conversion are to control circuit 505.
Described control circuit 505 exports corresponding display data and clock signal to data circuit circuit 5033, and further output timing signal to scan drive circuit 5031.Described scan drive circuit 5031 is according to described clock signal, and correspondence provides corresponding sweep signal to sweep trace 402.Described data drive circuit 5033 conversion receiver to display data be gray scale voltage, and according to clock signal export corresponding gray scale voltage give corresponding data line 503, with perform image display refresh.
It should be noted that, described Graphics Processing circuit 504 is not limited to comprise circuit described herein, also can not have wherein some circuit or comprises other circuit further.Such as, described compressor circuit 5035 is arranged in main control chip 6, but not in Graphics Processing circuit 504.
Usually, described touch driving circuit 501 is formed in a chip; Display driver circuit 503 is formed in a chip; For small-size product, the general and display driver circuit 503 of control circuit 505 is formed in same chip, and for large scale product, control circuit 505 is formed as alone a chip; Compressor circuit 5035, memory circuit 5037, decompression circuit 5038, color conversion circuit 5039 or be respectively formed in different chips, or being wherein combined to form in a chip of a few person.
A touch driving chip is formed in touch driving circuit 501, circuit in described touch driving circuit 501 both comprised digital circuit, also comprise mimic channel, digital circuit and mimic channel are not distinguished and is completely formed in a chip, manufacturing cost can be caused higher.
More specifically, each chip has a minimal characteristic live width.Described characteristic line breadth refers to the length of transistor gate.In general, minimal characteristic live width is less, and chip area is less, but manufacturing cost is higher, but along with diminishing of chip minimal characteristic live width, the degree that diminishes of mimic channel area does not have the degree that diminishes of digital circuit area high, even, after the minimal characteristic live width of chip reaches certain value, even if diminish again, mimic channel area also can not diminish, and digital circuit area can correspondence diminish, but cost still can uprise.Therefore, broadly touch driving circuit being formed in a mode with the chip of less characteristic line breadth at present will cause manufacturing cost higher.
Similarly, also there is same or similar technical matters in the chip at display driver circuit 503, Graphics Processing circuit 504, control circuit 505 place.
Inventor finds the problems referred to above by large quantity research, and proposes the technological thought that solve the technical problem and corresponding technological means.
By driving circuit 50 dividing by digital circuit and mimic channel, be respectively formed in different chips, such as, digital circuit is mainly formed in control chip, mimic channel is mainly formed in driving chip, thus adopt different minimal characteristic live width technique to manufacture control chip area can be made relatively to diminish, the relative step-down of driving chip cost, and then reach the object of saving manufacturing cost on the whole, in addition, the area sum of two chips relatively before circuit to be formed in the area of a chips little.
Correspondingly, following several solution is proposed:
First: touch driving circuit 501 is formed in a control chip and a driving chip;
Second: display driver circuit 503, Graphics Processing circuit 504 are formed in a control chip and a driving chip;
For the first and the second situation, touch driving circuit 501 control circuit 505 shared with display driver circuit 503 or be formed in the driving chip of the first situation, or be formed in the driving chip of the second situation, be preferably formed in the driving chip of the second situation.
3rd: touch driving circuit 501, control circuit 505, display driver circuit 503, Graphics Processing circuit 504 are formed in a control chip and a driving chip.The present invention is the third embodiment preferably, also to save cost further, and reduces the area of chip.
Described control chip mainly comprises digital circuit, and described driving chip mainly comprises mimic channel.It should be noted that, described control chip comprises fraction mimic channel.Described driving chip comprises fraction digital circuit.In addition, in described control chip, preferably include the resistance to circuit component forced down, but also can comprise the withstand voltage high circuit component of sub-fraction; Described driving chip preferably includes withstand voltage high circuit component, but also can comprise the resistance to circuit component forced down of sub-fraction.
Wherein, the minimal characteristic live width of control chip is less than the minimal characteristic live width of driving chip.
When adopting the scheme on modulation ground, described modulation circuit 506 is preferably formed in control chip.
Due to according to the type of circuit and resistance to pressure, foregoing circuit is respectively formed in different chip by the corresponding manufacturing process of different minimal characteristic live width that adopts, and therefore, can reduce cost of goods manifactured.
Correspondingly, the electronic equipment 700 of following embodiment is proposed.
Refer to Figure 25, Figure 25 is the structural representation of the another embodiment of electronic equipment of the present invention.Described electronic equipment 700 is substantially identical with the structure of aforementioned electronic devices 100,400, mainly based on the problem of aforementioned discovery, is formed in corresponding chip, saves cost of products by driving circuit 20,50 correspondence.Described electronic equipment 700 comprises touch display unit 7 and main control chip 8.Described touch display unit 7 comprises touch display panel 70, control chip 71 and driving chip 73.Described control chip 71 is connected between described main control chip 8 and described driving chip 73, and described driving chip 73 connects described touch display panel 70 further.
Described driving chip 73 is for providing touch-sensing control signal to sweep trace 702, active control switch 704, and for providing touch-sensing drive singal to described first electrode 701 by the gauge tap 704 of data line 703 and activation, drive described first electrode 701 to perform self-capacitance touch-sensing.
Described control chip 71 for carrying out Signal transmissions and process between described main control chip 8 and described driving chip 73.
Described driving chip 73 is further used for receiving the touch-sensing detection signal exported from the first electrode 701, processes described touch-sensing detection signal, and the signal relevant to touch-sensing detection signal after output processing gives described control chip 71.
Such as, described driving chip 73 comprises described touch-sensing control circuit 731, touch-sensing detecting unit 732, secondary signal treatment circuit 733 and analog to digital signal conversion unit 7351.Wherein, described touch-sensing control circuit 731 is for exporting touch-sensing control signal to sweep trace 702, described touch-sensing detecting unit 732 for the touch-sensing drive singal that exports secondary signal treatment circuit 733 and provide to data line 703, receive the touch-sensing detection signal exported from the first electrode 701, described touch-sensing detection signal is changed, and the signal exported after conversion is to analog to digital signal conversion unit 7351.Described analog to digital signal conversion unit 7351 carries out analog to digital conversion to the received signal, and the digital signal exported after conversion is to control chip 71.So, change ground, described touch-sensing control circuit 731 also can be formed in described touch display panel 70, is not limited in chip.
Described control chip 71 receives the input signal relevant to touch-sensing detection signal exported from driving chip 73, carries out level conversion process to described input signal.
Further, described control chip 71 calculates touch coordinate according to the signal after level conversion process, and output represents that the signal of touch coordinate is to described main control chip 8.
Such as, described control chip 71 comprises level conversion unit 7353 and computing unit 7355.Wherein, described level conversion unit 7353 is for carrying out level conversion to the digital signal from driving chip 73, and the digital signal after output level conversion is to computing unit 7355.Described computing unit 7355 calculates according to the digital signal after described level conversion and obtains touch coordinate, and output represents that the signal of touch coordinate is to described main control chip 8.
Described main control chip 8 controls electronic equipment 700 according to the signal correspondence of the expression touch coordinate received and performs corresponding function.
Further, as previously mentioned similar, control chip 71 to increase corresponding circuit module respectively in driving chip 73 or clipped circuit unit is also fine, or, adopt other circuit module or circuit unit also to realize identical function and be fine equally.Correspondingly, mainly according to the classification of digital circuit or mimic channel, and in conjunction with the situation of high-tension circuit and low-voltage circuit, related circuit module or circuit unit are respectively formed among driving chip 73 and control chip 71 by correspondence, wherein, driving chip 73 is more suitable for high-tension circuit, but such as low-voltage circuit but belong to mimic channel and also can be arranged in driving chip 73.Boundary between low pressure and high pressure can be weighed with 5V, and being more than or equal to 5V is high pressure, is low pressure lower than 5V.It should be noted that, for negative pressure can corresponding with (-5) V for boundary, 0V ~ (-5) V is then low pressure, (-5) V and the voltage lower than (-5) V, as (-6) V, is then high pressure.So, 5V, (-5) V are two examples, and this boundary value of different product can be different.Namely the basic thought of this embodiment of the present invention is type according to circuit component and resistance to pressure; the chip with different minimal characteristic live width is adopted to form different types of circuit respectively; thus saving cost of goods manifactured; therefore, other change embodiment based on the technological thought of this embodiment of the present invention all should fall into protection scope of the present invention.
Particularly, as, between analog to digital signal conversion unit 7351 and touch-sensing detecting unit 732, comprise filter unit further, the signal of described filter unit after carrying out filtering process to the signal that touch-sensing detecting unit exports again after output filtering is to analog to digital signal conversion unit 7351.Described filter unit is arranged in driving chip 73.
Further, described control chip 71 comprises a nonvolatile memory (not shown) further, and as flash storage, described nonvolatile memory is used for program code stored.Change ground, described nonvolatile memory also can be an independently chip, is connected with described control chip 71.
Be similar to aforementioned electronic devices 100, perform touch-sensing and image show refresh time, above-mentioned electronic equipment 700 can only adopt one to take GND as the territory of benchmark.Change ground, be similar to aforementioned electronic devices 400, described electronic equipment 700 also can adopt one to take GND as the territory of benchmark and one with MGND to be the territory of benchmark when performing touch-sensing, only adopts one to take GND as the territory of benchmark when performing image display and refreshing.Correspondingly, described control chip 71 comprises described modulation circuit 706 and described voltage generation circuit 75 further.Described modulation circuit 706 is connected between the second earth terminal 714 and the first earth terminal 713, and the second earth terminal 714 connects the earth terminal 83 of main control chip 8.First earth terminal 713 connects ground wire 712.The drive singal that described modulation circuit 706 provides according to described voltage generation circuit 75 is corresponding with equipment ground signalling GND on the ground produces modulation signal MGND.In addition, described control chip 71 comprises slope controller 77 further, is connected with described modulation circuit 706, for controlling the slope of the modulation signal MGND that modulation circuit 706 produces, to reduce electromagnetic interference (EMI) (EMI).
The specific works principle of described control chip 71 and described driving chip 73 is similar or be same as aforementioned touch driving circuit 20 or 50, repeats no more herein.
Further, between control chip 71 and driving chip 73, aforementioned protection circuit 53 or 53a is comprised further.It should be noted that; for protection circuit 53; because diode D1 and first, second electric capacity C1, C2 are discrete component; it is without the need to being formed in control chip 71 with driving chip 73; so; for protection circuit 53a, control module 573 and the 3rd active switch 571 can be preferably formed in control chip 71, and first, second electric capacity C1, C2 are without the need to being formed in control chip 71 with driving chip 73.
Because the circuit formed in control chip 71 is mainly digital circuit, and the circuit formed in driving chip 73 is mainly mimic channel, therefore, described control chip 71 and described driving chip 73 can adopt the semiconductor circuit technique with different minimal characteristic live widths to make respectively, thus reduce cost of products.
It should be noted that, also multiple control chip 71 can be respectively formed at multiple driving chip 73 for the circuit driving touch display panel 70 to perform touch-sensing, namely, be not limited to an above-mentioned control chip 71 and a driving chip 73, so, a control chip 71 and a driving chip 73 is preferably.
Similarly, also can be respectively formed in a control chip and a driving chip for the circuit driving touch display panel 70 to perform image display refreshing.This is repeated no longer separately herein.According to below to drive touch display panel 70 perform image display refresh being specifically divided in of circuit can be clear in which chip.
In order to save cost further, also the circuit driving touch display panel 70 to perform image display refreshing can be respectively formed at above-mentioned control chip 71 with driving chip 73.In addition, according to circuit types and resistance to pressure etc., the chips such as touch driving chip and image display chip are split again and distinguishes the original creation that formation control chip 71 and driving chip 73 are the application, and there is the effect that can reduce costs.
Correspondingly, described control chip 71 is further used for receiving the display data from main control chip 8, after carrying out relevant treatment (e.g., storage, decompression, color conversion etc.) to described display data, and the display data after output processing are to driving chip 73.Described driving chip 73 conversion receiver to display data be corresponding gray scale voltage, and provide gray scale voltage to the first electrode 701 perform image display.Described display data are preferably digital signal, and described gray scale voltage is preferably simulating signal.
Particularly, control chip 71 comprises Graphics Processing circuit 708, high-speed interface 710 and output interface 711 further.Described Graphics Processing circuit 708 is connected between high-speed interface 710 and level conversion unit 7353.Described output interface 711 comprises multiple pin, is connected with driving chip 73, for signal transmission between control chip 71 and driving chip 73.
Described driving chip 73 comprises control circuit 735, display driver circuit 734, public voltage generating circuit 737, first switch element 738, selection circuit 730, the 3rd K switch 3 and second switch unit 739 further.
It should be noted that, in the present embodiment, scan drive circuit (not shown) in described display driver circuit 734 is formed in driving chip 73, so, change ground, described scan drive circuit also can be formed on touch display panel 70, such as, is together produced on array base palte with gauge tap 704.In addition, the one in the first switch element 738, second switch unit 739, the 3rd K switch 3 and selection circuit 730 or the combination of any a few person also can be formed on touch display panel 70.
When adopting the technical scheme on non-modulation ground, control chip 71 is identical or similar with the circuit module of same names in aforementioned driving circuit 20 or the concrete structure of circuit unit and annexation each other, principle of work with driving chip 73, repeats no more herein.For this kind of technical scheme, in control chip 71, then correspondence does not arrange modulation circuit 706, voltage generation circuit 75 and slope controller 77.
When adopting the technical scheme on modulation ground, control chip 71 is identical or similar with the circuit module of circuit of same names in aforementioned driving circuit 50 or the concrete structure of circuit unit and annexation each other, principle of work with driving chip 73, repeats no more herein.
In addition, similar Figure 15, one the 3rd K switch 3, touch-sensing detecting unit 732, analog to digital signal conversion unit 7351 and a computing unit 7355 is only shown in Figure 25, in fact, driving chip 73 comprises multiple touch-sensing detecting unit 732, multiple 3rd K switch 3, multiple analog to digital signal conversion unit 7351 and multiple computing unit 7355.
The display data that described control chip 71 exports to described driving chip 73 are voltage signal or current signal.
Preferably, described driving chip 73 is when providing touch-sensing drive singal to described first electrode 701, and described driving chip 73 stops receiving display data from control chip 71, and stops exporting gray scale voltage to touch display panel 70.
Preferably, the amount of the display data that the amount of display data that described control chip 71 stores stores more than described driving chip 73.
The memory capacity of described control chip 71 is greater than the memory capacity of described driving chip 73.
Such as, the no more than whole frame of amount of the display data of described driving chip 73 storage shows 1/5th of the amount of data.
Preferably, the instantaneous velocity that the instantaneous velocity that described control chip 71 transmits display data toward described driving chip 73 transmits display data than main control chip 8 toward described control chip 71 is slow.
Described main control chip 8 comprises the output interface 89 be connected with control chip 71, and described output interface 89 comprises multiple pin.Correspondingly, the pin number of the output interface 89 of described main control chip 8 is less than the pin number of the output interface 711 of described control chip 71.
Described touch display panel 70 is chosen as the touch display panel being not more than 12.1 inches.
Because described touch display unit 7 comprises driving chip 73 and control chip 71, thus save cost of products.
It should be noted that, the control chip 71 different for the amount of above-mentioned storage display data and driving chip 73, the present invention is also not limited to described two chips and is respectively described control chip 71 and driving chip 73, namely, described two chips do not limit a chip and mainly comprise digital circuit, and another chip mainly comprises mimic channel.Correspondingly, the first chip and the second chip that are connected also be can be for different two chips of amount storing display data, wherein, the first chip institute store the amount showing data be greater than the second chip store the amount showing data.Second chip is used for providing gray scale voltage for described multiple first electrode 701, drive described multiple first electrode 701 to perform image display to refresh, also for providing touch-sensing drive singal for described multiple first electrode 701, described multiple first electrode is driven to perform self-capacitance touch-sensing.Wherein, described second chip transforms display data is described gray scale voltage.
The minimal characteristic live width of described first chip is less than the minimal characteristic live width of described second chip.
The memory capacity of the first chip is greater than the memory capacity of the second chip.
The amount of the display data of the second chip-stored is less than 1/5th of whole frame display data.
Described first chip is such as control chip, and described second chip is such as driving chip.
Further, described control chip 71 is preferably arranged on a flexible circuit board, and described driving chip 73 preferably binds (Bonding) on the array base palte of described touch display panel 70.Described control chip 71 is connected with described driving chip 73 by flexible circuit board.
For embodiment driving circuit is respectively formed in two chips, can with further reference to the driving circuit 50 shown in Figure 15, visible driving circuit 50 is divided in the circuit in two territories 480 and 490, and correspondence is preferably respectively formed at control chip 71 with driving chip 73.Namely; the circuit be divided in territory 480 is formed in control chip 71; the circuit be divided in territory 490 is formed in driving chip 73; in addition; level conversion unit 5353 across two territories is formed in control chip 71, and whether protection circuit 53 or 53a are formed in control chip 71 according to concrete component type corresponding selection as previously mentioned.
It should be noted that, in fig. 25, control chip 71, driving chip 73 have employed different labels from the circuit of same names in driving circuit 50 and indicate, such as, level conversion unit in control chip 71 adopts label 7353 to indicate, but circuit structure is identical with function or similar, also illustrates, repeats no more before herein.
In addition, for touch display unit, prior art is all generally be formed in a chips by the circuit driving touch display panel to perform touch-sensing, the circuit driving touch display panel to perform image display refreshing is formed in another chips, the present invention proposes the digital circuit in two chips to be mainly formed in a chips, technological thought mimic channel being mainly formed in another chips can reduce the manufacturing cost of product, and in addition, chip area also can diminish.Therefore, for partition existing touch driving chip and image display chip be the touch display unit 1,4,7 etc. that control chip and this embodiment of driving chip are not only suitable for each embodiment of the present invention, also the touch display unit of other type is suitable for, comprise self-tolerant and mutual tolerance formula touch display unit, or touch-screen is configured in touch display unit outside display panel and touch-screen and is formed in various types of touch display units etc. in display panel.
Refer to Figure 26, the part-structure schematic diagram of the another embodiment that Figure 26 is touch display panel 10 shown in Fig. 3.10b is denoted as in order to distinguish the touch display panel shown in the touch display panel 10, Figure 26 shown in Fig. 3.Described touch display panel 10b is identical with the basic structure of described touch display panel 10, the key distinction of the two is: the quantity of the gauge tap 104 of described touch display panel 10b becomes many, arranges two gauge tap 104 between every scan line 102 and data line 103 infall.The control electrode G of described two gauge tap 104 connects sweep trace 102, first transmission electrode S connection data line 103 of the gauge tap 104 in described two gauge tap 104, second transmission electrode D connects the first transmission electrode S of another gauge tap 104, and the second transmission electrode D of another gauge tap 104 connects the first electrode 101.The mode of the gauge tap 104 that setting like this is connected in series, can reduce leakage current.Similarly, touch display panel 40,70 and the gauge tap 404,704,904 of touch display panel 90 that will address below also can be connected a gauge tap respectively; Described modulation circuit 506,706 and first, second, third active switch 561,563,571 in protection circuit 53,53a also can preferably be connected an active switch respectively.
It should be noted that, when adopting the mode on modulation ground, described first electrode 401,701 is not restricted to pixel electrode, also can be public electrode, when the first electrode is public electrode, the second electrode pair should be pixel electrode, certainly, this two classes electrode position also will corresponding to adjustment.When adopting public electrode to do self-capacitance touch-sensing electrode, described driving circuit 50, driving chip 73 correspondence provide common electric voltage to perform image display refreshing to the first electrode 401,701.That is, when adopting the mode on modulation ground, according to being that pixel electrode or public electrode do self-capacitance touch-sensing electrode, described driving circuit 50, driving chip 73 provide corresponding display voltage to perform image display refreshing to the first electrode 401,701.Wherein, described display voltage is gray scale voltage or common electric voltage.
Refer to Figure 27, Figure 27 is the process flow diagram of the driving method of inventive touch display device.Described touch display unit is as the touch display unit for aforementioned various embodiment, as touch display unit 1,4,7, so, driving method of the present invention is not limited to the touch display unit of aforementioned various embodiment, also can be the touch display unit of other suitable construction.Described touch display unit comprises touch display panel, and described touch display panel comprises multiple first electrode; Described driving method comprises:
Step S101: provide touch-sensing drive singal to perform self-capacitance touch-sensing to the first electrode;
Step S102: provide gray scale voltage to perform image display to the first electrode and refresh.
Described driving method is such as that timesharing provides described touch-sensing drive singal and described gray scale voltage to described touch display panel.
Described touch display panel comprises further:
Multi-strip scanning line;
A plurality of data lines, to insulate cross arrangement with described multi-strip scanning line; With
Multiple gauge tap, each gauge tap comprises control electrode, the first transmission electrode and the second transmission electrode, and wherein, control electrode is connected with sweep trace, and the first transmission electrode is connected with data line, the second transmission electrode and the first Electrode connection;
Described driving method comprises further:
Step S103: provide touch-sensing control signal to described multi-strip scanning line, to activate the gauge tap be connected with sweep trace;
Correspondingly, for step S101: first provide touch-sensing drive singal to data line, described touch-sensing drive singal is transferred to described multiple first electrode by the gauge tap activated again, performs self-capacitance touch-sensing to described multiple first electrode.
Preferably, the pressure reduction between described touch-sensing control signal and described touch-sensing drive singal remains unchanged.
Described driving method comprises further:
Step S104: the touch-sensing detection signal exported from the first electrode by gauge tap and the data line reception of described activation;
Step S105: calculate described touch display panel according to described touch-sensing detection signal and touched or close position by user.
For step S101: provide touch-sensing drive singal to described a plurality of data lines, being transferred to described multiple first electrode with the gauge tap by activating, self-capacitance touch-sensing being performed to described multiple first electrode, comprising:
Once provide touch-sensing drive singal to part or all of data line simultaneously.
For step S103: provide touch-sensing control signal to described multi-strip scanning line, to activate the gauge tap be connected with sweep trace, comprising:
Once provide touch-sensing control signal at least two sweep traces, to activate the gauge tap be connected with described at least two sweep traces simultaneously.Preferably, provide touch-sensing control signal at least two sweep traces, to activate the gauge tap be connected with described at least two sweep traces at every turn simultaneously.Described at least two sweep traces are adjacent scanning lines or interlaced line.
In addition, for step S103: provide touch-sensing control signal to described multi-strip scanning line, to activate the gauge tap be connected with sweep trace, also can comprise:
Once provide touch-sensing control signal to a sweep trace, to activate the gauge tap be connected with described sweep trace.
Preferably, once provide touch-sensing control signal to the number of the sweep trace be positioned in the middle part of touch-screen more than once providing touch-sensing control signal to the number of sweep trace being positioned at touch-screen edge simultaneously simultaneously.
For step S104: the touch-sensing detection signal exported from the first electrode by gauge tap and the data line reception of described activation, being comprised:
Grouping receives described touch-sensing detection signal, and at least one group comprises from the touch-sensing detection signal on a data line, or/and at least one group comprises from the touch-sensing detection signal at least two data lines.
Such as, often group comprises from the touch-sensing detection signal at least two data lines.
At least one group comprises from the touch-sensing detection signal of at least two adjacent data lines or at least two on column data line.
Described driving method comprises further:
Step S106: provide sweep signal to described multi-strip scanning line, activates the gauge tap be connected with sweep trace.
Correspondingly, for step S102: first provide gray scale voltage to data line, described gray scale voltage is transferred to described multiple first electrode by the gauge tap activated again, realizes image display refresh to drive described touch display unit.
The stage defining the first electrode execution touch-sensing is the touch-sensing stage, and the stage defining the first electrode execution image display refreshing is the image display refreshing stage; Described touch-sensing stage and described image show the timesharing of refreshing stage and perform.
Such as, in a touch-sensing stage, described driving method provides touch-sensing drive singal to perform self-capacitance touch-sensing to part first electrode, until provide touch-sensing drive singal by multiple touch-sensing stage of carrying out successively to all first electrodes, self-capacitance touch-sensing is carried out to all first electrodes; With
After each touch-sensing stage terminates, the first electrode providing gray scale voltage to terminate to the touch-sensing stage, drives the first electrode to refresh to perform image display.
Described image display refreshing stage and described touch-sensing stage hocket.
Further, in the touch-sensing stage, described driving method performs touch-sensing to described part first electrode simultaneously; In the image display refreshing stage, described driving method performs display to described part first electrode line by line and refreshes.
Described touch display panel comprises the second electrode further, and described driving method comprises further:
Step S107: provide common electric voltage to the second electrode, realizes image display to coordinate touch display panel described in the first electrode drive.
Described driving method can be selected different in the image display refreshing stage from the common electric voltage that the touch-sensing stage is supplied to the second electrode.Further, in the touch-sensing stage, described driving method touch display panel be in blank screen holding state and bright screen duty time-division you can well imagine the common electric voltage of supply second electrode also can be different.
Preferably, in the touch-sensing stage, the pressure reduction that described driving method is supplied between the common electric voltage of the second electrode and the touch-sensing drive singal being supplied to the first electrode remains unchanged.
In the image display refreshing stage, the common electric voltage that described driving method is supplied to the second electrode is the first common electric voltage; In the touch-sensing stage and touch display panel is in bright screen duty time, the common electric voltage that described driving method is supplied to the second electrode is the second common electric voltage; In the touch-sensing stage and touch display panel is in blank screen holding state time, the common electric voltage that described driving method is supplied to the second electrode is the 3rd common electric voltage.Wherein, described 3rd common electric voltage is identical with touch-sensing drive singal.
It should be noted that, in image display refreshing stage and touch-sensing stage, described driving method is supplied to the common electric voltage of the second electrode of touch display panel also can be identical.
Further, to perform the refreshing frequency that image shows identical for the described driving method refreshing frequency that drives described multiple first electrode to perform self-capacitance touch-sensing and described multiple first electrode of driving.
Particularly, e.g., described driving method adopts interlaced display scan and interlacing to touch the mode scanned to drive described multiple first electrode to perform image respectively to show and refresh and touch-sensing.
Described touch display panel comprises ground wire further, and described driving method comprises further:
Step S108: in the touch-sensing stage, provides modulation signal to described ground wire;
Described modulation signal is for modulating the input signal of described touch display panel.Described input signal comprises touch-sensing control signal, touch-sensing drive singal, the second common electric voltage or/and the 3rd common electric voltage; Described touch-sensing control signal, touch-sensing drive singal, the second common electric voltage are or/and the 3rd common electric voltage all changes with the change of described modulation signal.
In the present embodiment, described touch-sensing control signal, touch-sensing drive singal, the second common electric voltage, the 3rd common electric voltage all raise with the rising of described modulation signal, reduce with the reduction of described modulation signal.So, change ground, in other embodiments, described touch-sensing control signal, touch-sensing drive singal, the second common electric voltage, variation relation between the 3rd common electric voltage and described modulation signal also can be other suitable variation relation.
The changes in amplitude size of described touch-sensing control signal, touch-sensing drive singal, the second common electric voltage, the 3rd common electric voltage is such as corresponding identical with the changes in amplitude size of described modulation signal.
Described touch-sensing control signal, touch-sensing drive singal, the second common electric voltage, the 3rd common electric voltage and described modulation signal are such as the same frequency of same width and the phase place of the phase place relative modulation signal of described touch-sensing control signal, touch-sensing drive singal, the second common electric voltage, the 3rd common electric voltage all has certain delay.
Described driving method comprises further:
According to one first reference signal and one second reference signal, the described modulation signal of corresponding generation.
Such as, described modulation signal comprises the square-wave signal that the first reference signal and the second reference signal alternately occur, wherein, the voltage of described first reference signal and the second reference signal is any one in following four kinds of situations:
The voltage of the first: the first reference signal is positive voltage, and the voltage of the second reference signal is 0V;
The voltage of the second: the first reference signal is 0V, and the voltage of the second reference signal is negative voltage;
The voltage of the three: the first reference signal is positive voltage, and the voltage of the second reference signal is negative voltage, and the absolute value of the voltage of described first reference signal equals or is not equal to the absolute value of voltage of described second reference signal;
Positive voltages different sized by the voltage of the four: the first reference signal, the second reference signal.
Negative voltages different sized by the voltage of the five: the first reference signal, the second reference signal.
Described first reference signal, the second reference signal are such as constant voltage signal.Described modulation signal is the periodically variable square-wave signal that the first reference signal and the second reference signal alternately occur.
Alternatively, provide touch-sensing control signal to sweep trace after, provide touch-sensing drive singal to data line before, described driving method comprises further:
Short circuit reaches a schedule time for exporting touch-sensing detection signal to each first electrode of same group.
At short circuit for exporting after touch-sensing detection signal reaches a schedule time to each first electrode of same group, described driving method comprises further:
There is provided a predetermined voltage to the first electrode of phase short circuit.
After the first electrode of phase short circuit reaches described predetermined voltage, provide touch-sensing drive singal to data line.
Particularly, before step S105, that is, to be touched by target object or before close position, described driving method comprises further calculating described touch display panel according to described touch-sensing detection signal:
(voltage waveform as touch-sensing detection signal is changed to carry out respective handling to the touch-sensing detection signal of the first electrode output, or be voltage swing conversion, or be converted to current waveform for voltage waveform, or electric charge is to the conversion of voltage), and the conversion of analog to digital signal is carried out to the touch-sensing detection signal after process; With
Level conversion is carried out to the touch-sensing detection signal after the conversion of analog to digital signal.
Described step S105 be according to level conversion after digital signal obtain touch coordinate, and then determine that described touch display unit is touched by target object or close position.
It should be noted that, when adopting the mode on modulation ground, described first electrode is not restricted to reception gray scale voltage, also can receive common electric voltage, and correspondingly, the second electrode receives gray scale voltage, and in addition, the second electrode is corresponding with the position of the first electrode will be exchanged.It should be noted that further, driving method of the present invention does not limit the order of above steps, and the order of described each step can carry out suitable adjustment, and in addition, driving method of the present invention also can omit or increase some step.
Referring again to Fig. 2, it is to be appreciated that for multiple first electrodes 101 touching display surface 10, it is that timesharing is carried out that described touch-sensing stage and image show the refreshing stage, that is, one first electrode 101 is when performing touch-sensing, and another the first electrode 101 non-concurrent performs image display and refreshes.So, as aforementioned, when show electrode 11 not all on touch display panel 10 is all as the first electrode 101, the state be not used in as the show electrode 11 of the first electrode 101 shows the definition in refreshing stage to above-mentioned touch-sensing stage and image not to be affected.In other words, when in the touch-sensing stage, the show electrode 11 being not used as the first electrode 101 can perform image display and refresh.But, for this kind of situation, be not used as show electrode 11 and the same data line 103 of the first electrode 101 multiplex of the first electrode 101.
Change ground, in some embodiments, one first electrode 101 is when performing touch-sensing, another first electrode 101 also can perform image display simultaneously and refresh, correspondingly, touch display panel 10 needs to increase further gauge tap 104, sweep trace 102, quantity with data line 103, as shown in figure 28.
Refer to Figure 28, Figure 28 is the part-structure schematic diagram of another embodiment of electronic equipment of the present invention.Described electronic equipment 900 is with the key distinction of the electronic equipment 100 of above-mentioned embodiment: the quantity of the sweep trace 902 of the touch display panel 90 of described electronic equipment 900 and 902a, data line 903 and 903a and gauge tap 904 and 904a is more than the quantity of the sweep trace 102 of the touch display panel 10 of the electronic equipment 100 of aforementioned embodiments, data line 103 and gauge tap 104.Especially, the sweep trace 902 of the touch display panel 90 of described electronic equipment 900 and 902a, data line 903 and 903a and gauge tap 904 and the quantity of 904a are respectively the twice of the quantity of the sweep trace 102 of the touch display panel 10 of the electronic equipment 100 of aforementioned embodiments, data line 103 and gauge tap 104, and the quantity of the data line 903 of the touch display panel 90 of described electronic equipment 900 is preferably identical with the quantity of the transmission ends b of touch-sensing testing circuit (not shown).
Wherein, sweep trace 902a, data line 903a and gauge tap 904a are newly-increased element.Newly-increased sweep trace 902a, newly-increased data line 903a are connected respectively with newly-increased gauge tap 904a, and newly-increased gauge tap 904 is connected with the first electrode 901.Correspondingly, newly-increased sweep trace 902a, newly-increased data line 903a and newly-increased gauge tap 904a are used for working when the first electrode 901 performs touch-sensing, namely, the image display of touch display panel 90 refreshes and multiplexing first electrode 901 of touch-sensing, and not multiplexing sweep trace 902, data line 903 and gauge tap 904.
Due to the change of above-mentioned touch display panel 90 structure, correspondingly, when one first electrode 901 performs touch-sensing, another first electrode 901 can perform image display simultaneously and refresh.Correspondingly, in this embodiment, touch-sensing stage and image show the refreshing stage and can carry out simultaneously or the two time have overlapping.So, the structure of this embodiment also can realize timesharing and performs touch-sensing stage and image and show the refreshing stage.
Further, for the embodiment performing touch-sensing stage and image and show the refreshing stage simultaneously, the common electric voltage of the second electrode 905 is as being constant voltage.Certainly, for the scheme on modulation ground, described common electric voltage changes with modulation signal.
So, the respective embodiments described above of the present invention preferred touch-sensing stage and image show the timesharing of refreshing stage and carry out.
It should be noted that, for the scheme on modulation ground, preferably when one first electrode 901 performs touch-sensing, another the first electrode 901 non-concurrent performs image display and refreshes, namely, for the scheme on modulation ground, touch display panel 90 preferably timesharing performs image display refreshing stage and touch-sensing stage.More preferably, for the scheme on modulation ground, whole show electrodes of touch display panel 90 are all as the first electrode.
Although embodiment is described about concrete configuration and the sequence of operation here, should be appreciated that, the embodiment substituted can increase, omits or change element, operation etc.Therefore, embodiment disclosed herein is meant to be embodiment instead of restriction.
Claims (48)
1. a touch display unit, comprising:
Touch display panel, comprises multiple first electrode;
Driving chip, is connected with described touch display panel, performs self-capacitance touch-sensing for providing touch-sensing drive singal to described multiple first electrode; With
Control chip, be connected with described driving chip, for providing modulation signal to described driving chip, described modulation signal for modulate described driving chip when driving described touch display panel to perform touch-sensing be supplied to the input signal of touch display panel, described input signal comprises described touch-sensing drive singal.
2. touch display unit as claimed in claim 1, is characterized in that: described touch-sensing drive singal raises with the rising of described modulation signal, reduces with the reduction of described modulation signal.
3. touch display unit as claimed in claim 2, it is characterized in that: described control chip comprises modulation circuit, described modulation circuit is for generation of described modulation signal, described modulation signal comprises the first reference signal and the second reference signal, wherein, described first reference signal is different from described second reference signal.
4. touch display unit as claimed in claim 3, is characterized in that: the voltage of described first reference signal and the second reference signal can be in following five kinds of situations any one:
The voltage of the first: the first reference signal is positive voltage, and the voltage of the second reference signal is 0V;
The voltage of the second: the first reference signal is 0V, and the voltage of the second reference signal is negative voltage;
The voltage of the three: the first reference signal is positive voltage, and the voltage of the second reference signal is negative voltage, and the absolute value of the voltage of described first reference signal equals or is not equal to the absolute value of voltage of described second reference signal;
Positive voltages different sized by the voltage of the four: the first reference signal, the second reference signal;
Negative voltages different sized by the voltage of the five: the first reference signal, the second reference signal.
5. touch display unit as claimed in claim 3, is characterized in that: described modulation signal is the periodically variable square-wave signal that the first reference signal and the second reference signal alternately occur.
6. touch display unit as claimed in claim 3, is characterized in that: signal is ground signalling one of in described first reference signal and described second reference signal, and another signal is drive singal, and described drive singal is higher than described ground signalling.
7. touch display unit as claimed in claim 3, is characterized in that: described first reference signal and described second reference signal are constant voltage signal.
8. touch display unit as claimed in claim 3, it is characterized in that: described modulation circuit for be connected to described driving chip and an electronic equipment one end between, described modulation circuit is for receiving the first reference signal from electronic equipment, described control chip comprises voltage generation circuit further, described voltage generation circuit is connected with described modulation circuit, for providing the second reference signal to described modulation circuit.
9. touch display unit as claimed in claim 8, is characterized in that: described modulation circuit is equipment ground for connecting one end of electronic equipment, and receive from the ground signalling that exports of equipment ground, described first reference signal is ground signalling; Or described modulation circuit is power supply end for connecting one end of electronic equipment, receive the power supply voltage exported from power supply end, described first reference signal is power supply voltage; Or described modulation circuit is reference power source end for connecting one end of electronic equipment, receive the reference voltage exported from reference power source end, described first reference signal is reference voltage.
10. touch display unit as claimed in claim 9, it is characterized in that: described power supply voltage is higher than described ground signalling, therebetween pressure reduction remains unchanged, the height of described reference voltage between described ground signalling and the height of described power supply voltage, and and pressure reduction between described ground signalling remain unchanged.
11. touch display units as claimed in claim 3, is characterized in that: described control chip comprises slope controller further, described slope controller for control described modulation circuit produce the slope of modulation signal.
12. touch display units as claimed in claim 3, is characterized in that: described driving chip is further used for providing gray scale voltage to perform image display to described multiple first electrode and refreshes.
13. touch display units as claimed in claim 12, it is characterized in that: the stage defining the first electrode execution image display refreshing is the image display refreshing stage, the stage defining the first electrode execution touch-sensing is the touch-sensing stage, described touch-sensing stage and described image show the timesharing of refreshing stage to carry out, described modulation circuit is connected with described driving chip, in the touch-sensing stage, described modulation circuit exports modulation signal to described driving chip; In the image display refreshing stage, described modulation circuit exports constant voltage signal to described driving chip.
14. touch display units as claimed in claim 13, it is characterized in that: described modulation signal is the voltage reference of described driving chip when the touch-sensing stage works, described constant voltage signal is the voltage reference of described driving chip when image display refreshing stage work.
15. touch display units as claimed in claim 14, is characterized in that: described modulation circuit is connected with described touch display panel further, and in the touch-sensing stage, described modulation circuit exports modulation signal to described touch display panel; In the image display refreshing stage, described modulation circuit exports constant voltage signal to described touch display panel.
16. touch display units as claimed in claim 15, it is characterized in that: described modulation signal is the voltage reference of described touch display panel when the touch-sensing stage works, described constant voltage signal is the voltage reference of described touch display panel when image display refreshing stage work.
17. touch display units as claimed in claim 16, is characterized in that: described touch display panel comprises the second electrode, and described second electrode is used for forming electric field between described multiple first electrode, shows image to drive touch display panel.
18. touch display units as claimed in claim 17, is characterized in that: described driving chip comprises public voltage generating circuit, described public voltage generating circuit and described second Electrode connection, for providing common electric voltage to the second electrode.
19. touch display units as claimed in claim 18, it is characterized in that: the common electric voltage that described public voltage generating circuit is supplied to the second electrode in the image display refreshing stage is different from the common electric voltage being supplied to the second electrode in the touch-sensing stage, wherein, in the touch-sensing stage, the pressure reduction that described public voltage generating circuit is supplied between the common electric voltage of the second electrode and touch-sensing drive singal remains unchanged.
20. touch display units as claimed in claim 18, is characterized in that: described touch display panel comprises further:
Multi-strip scanning line;
A plurality of data lines, insulate arranged in a crossed manner with described multi-strip scanning line;
Multiple gauge tap, for being connected respectively with described multi-strip scanning line and a plurality of data lines, wherein, each gauge tap comprises control electrode, the first transmission electrode and the second transmission electrode, wherein, control electrode is connected with sweep trace, and the first transmission electrode is connected with data line, the second transmission electrode and the first Electrode connection.
21. touch display units as claimed in claim 20, is characterized in that: described touch display unit comprises further:
Touch-sensing control circuit, for providing touch-sensing control signal to sweep trace, activates the gauge tap that is connected with sweep trace, described touch-sensing control circuit or be formed on described touch display panel, or is formed in described driving chip;
Described driving chip exports touch-sensing drive singal to the first electrode by the gauge tap of data line and activation, and wherein, the pressure reduction between described touch-sensing control signal and described touch-sensing drive singal remains unchanged.
22. touch display units as claimed in claim 21, is characterized in that: described touch display unit comprises further:
Scan drive circuit, for providing sweep signal to sweep trace, activates the gauge tap that is connected with sweep trace, described scan drive circuit or be formed on described touch display panel, or is formed in described driving chip;
Described driving chip comprises further:
Data drive circuit, for exporting gray scale voltage to the first electrode by the gauge tap of data line and activation.
23. touch display units as claimed in claim 22, is characterized in that: described driving chip comprises further:
Secondary signal treatment circuit, for generation of described touch-sensing drive singal; With
Touch-sensing detecting unit, is connected with described secondary signal treatment circuit and data line, for receiving the touch-sensing drive singal that described secondary signal treatment circuit exports, and transmits described touch-sensing drive singal to described data line.
24. touch display units as claimed in claim 23, is characterized in that: in the touch-sensing stage, and described touch-sensing detecting unit is further used for receiving the touch-sensing detection signal exported from the first electrode.
25. touch display units as claimed in claim 24, is characterized in that: described touch-sensing detecting unit comprises the first operational amplifier, feedback capacity and the 4th switch; Described first operational amplifier comprises in-phase end, end of oppisite phase and output terminal, described feedback capacity and the 4th switch and is connected between described output terminal and end of oppisite phase, described in-phase end is connected with described secondary signal treatment circuit, described output terminal is connected with described control chip, described end of oppisite phase is connected with described data line further, and described end of oppisite phase is for transmitting touch-sensing drive singal and touch-sensing detection signal.
26. touch display units as claimed in claim 25, is characterized in that: described driving chip comprises further:
Analog to digital signal conversion unit, is connected with the output terminal of described first operational amplifier, carries out analog to digital conversion for the signal exported described first operational amplifier.
27. touch display units as claimed in claim 26, it is characterized in that: described control chip comprises level conversion unit and computing unit further, described level conversion unit is connected between described computing unit and described analog to digital signal conversion unit, the digital signal that described level conversion unit is used for described analog to digital signal conversion unit exports carries out level conversion, and the digital signal after output level conversion is to computing unit, described computing unit calculates according to the digital signal after level conversion the position that described touch display panel is touched.
28. touch display units as claimed in claim 23, it is characterized in that: described driving chip comprises control circuit further, described control circuit is connected respectively with public voltage generating circuit, scan drive circuit, data drive circuit, touch-sensing control circuit and touch-sensing detecting unit, for controlling public voltage generating circuit, scan drive circuit, data drive circuit, touch-sensing control circuit and the work of touch-sensing detecting unit.
29. touch display units as claimed in claim 28, it is characterized in that: described control chip comprises Graphics Processing circuit and level conversion unit further, described level conversion unit is connected between described Graphics Processing circuit and described control circuit, described Graphics Processing circuit is for receiving the display data from a main control chip, described display data are processed, and the display data after output processing are to level conversion unit, described level conversion unit carries out level conversion to the display data received, and the display data after output level conversion are to control circuit.
30. touch display units as claimed in claim 29, it is characterized in that: described control circuit exports corresponding display data to data drive circuit, and output timing signal is to scan drive circuit, described scan drive circuit activates corresponding sweep trace according to the clock signal received, described data drive circuit conversion receiver to display data be corresponding gray scale voltage, and export gray scale voltage give corresponding first electrode.
31. touch display units as claimed in claim 28, is characterized in that: described Graphics Processing circuit stores the display data received, decompresses and color conversion process.
32. touch display units as claimed in claim 22, it is characterized in that: described touch display unit comprises selection circuit further, described selection circuit is connected respectively with described touch-sensing control circuit and described scan drive circuit, and be connected with sweep trace further, for selecting to be export touch-sensing control signal or sweep signal to sweep trace, described selection circuit or be formed on touch display panel, or be formed in described driving chip.
33. touch display units as claimed in claim 23, is characterized in that: described touch display unit comprises further:
First switch element, be arranged between data drive circuit and data line, described first switch element comprises multiple first switch, described multiple first switch and described multi-strip scanning line connect one to one, described first switch element or be formed on touch display panel, or be formed in described driving chip; With
Second switch unit, be arranged between data drive circuit and data line, described second switch unit comprises multiple second switch, described multiple second switch and described multi-strip scanning line connect one to one, described second switch unit or be formed on touch display panel, or be formed in described driving chip.
34. touch display units as claimed in claim 32, is characterized in that: described touch display unit comprises further:
3rd switch, 3rd switch connects and touch-sensing detecting unit connects one to one, described 3rd switch is connected with data line further by second switch, wherein, at least one 3rd switch connects at least two second switches, 3rd switch or be formed on touch display panel, or be formed in described driving chip.
35. touch display units as claimed in claim 3, is characterized in that: described modulation circuit comprises control module, the first active switch and the second active switch; First active switch comprises control electrode, the first transmission electrode and the second transmission electrode; Second active switch comprises control electrode, the first transmission electrode and the second transmission electrode; Wherein, the control electrode of the first active switch is connected described control module with the control electrode of the second active switch; First transmission electrode of described first active switch receives the first reference signal, second transmission electrode of described first active switch connects the first transmission electrode of described second active switch, and the second transmission electrode of described second active switch receives the second reference signal; Define a node between second transmission electrode of described first active switch and the first transmission electrode of described second active switch, by controlling the first Switching Power Supply and second switch power supply, to come corresponding be export described first reference signal or the second reference signal at described node to described control module.
36. touch display units as claimed in claim 35, it is characterized in that: described control chip comprises the second earth terminal, described second earth terminal is connected with the equipment ground of an electronic equipment, receive the ground signalling from equipment, first transmission electrode of described first active switch connects described second earth terminal, and described first reference signal is described ground signalling.
37. touch display units as claimed in claim 36, is characterized in that: described driving chip comprises the first earth terminal, and described node connects described first earth terminal.
38. touch display units as claimed in claim 37, it is characterized in that: described touch display panel comprises ground wire, described ground wire connects described node.
39. touch display units as claimed in claim 38, is characterized in that: described driving chip is further used for providing gray scale voltage to perform image display to described multiple first electrode and refreshes; The stage defining the first electrode execution image display refreshing is the image display refreshing stage, and the stage defining the first electrode execution touch-sensing is the touch-sensing stage, and described touch-sensing stage and described image show the timesharing of refreshing stage to carry out; In the touch-sensing stage, described modulation circuit exports modulation signal to the first earth terminal and ground wire by described node; In the image display refreshing stage, described modulation circuit exports ground signalling to described first earth terminal and ground wire by described node.
40. touch display units as claimed in claim 39, it is characterized in that: described control chip comprises the first power end, described first power end is for receiving supply voltage, described driving chip comprises second source end, described second source end is for receiving supply voltage, described touch display unit comprises protection circuit further, described protection circuit is arranged between described first power end and second source end, for disconnecting the connection between the first power end and second source end when the supply voltage of described second source end is greater than the supply voltage of described first power end.
41. touch display units as claimed in claim 40, it is characterized in that: described protection circuit comprises diode, first electric capacity, with the second electric capacity, wherein, the anode of described diode is connected with the first power end, the negative electrode of described diode is connected with described second source end, one end of described first electric capacity is connected between the anode of described diode and the first power end, the other end of described first electric capacity is connected between the second earth terminal and described modulation circuit, one end of described second electric capacity is connected between the negative electrode of described diode and second source end, the other end of described second electric capacity is connected between the first earth terminal and described modulation circuit.
42. touch display units as claimed in claim 40, is characterized in that: described protection circuit comprises control module, the 3rd active switch, the first electric capacity and the second electric capacity; Described 3rd active switch comprises control electrode, the first transmission electrode and the second transmission electrode; The control electrode of described 3rd active switch is connected with the control module of protection circuit, and the first transmission electrode of the 3rd active switch is connected with described first power end, and the second transmission electrode of the 3rd active switch is connected with described second source end; Between the first transmission electrode that one end of described first electric capacity is connected to described 3rd active switch and the first power end, the other end of described first electric capacity is connected between the second earth terminal and described modulation circuit; Between the second transmission electrode that one end of described second electric capacity is connected to described 3rd active switch and second source end, the other end of described second electric capacity is connected between the first earth terminal and described modulation circuit.
43. touch display units as claimed in claim 1, is characterized in that: the minimal characteristic live width of described control chip is less than the minimal characteristic live width of described driving chip.
44. 1 kinds of electronic equipments, comprise the touch display unit in claim 1-43 described in any one.
45. 1 kinds of electronic equipments, comprise the touch display unit described in any one in claim 12-34,39-42, described electronic equipment comprises main control chip further, described main control chip is used for providing display data to described control chip, and described control chip is used between described main control chip and described driving chip, carry out the transmission and the process that show data.
46. electronic equipments as claimed in claim 45, is characterized in that: the instantaneous velocity that described control chip transmits display data instantaneous velocity toward described driving chip transmits display data than main control chip toward described control chip is slow.
47. electronic equipments as claimed in claim 46, it is characterized in that: described main control chip comprises the output interface be connected with control chip, described control chip comprises the output interface be connected with driving chip, wherein, the pin number of the output interface of described main control chip is less than the pin number of the output interface of described control chip.
48. electronic equipments as claimed in claim 45, is characterized in that: described main control chip is also for powering for described touch display unit, and described driving chip is converted to gray scale voltage according to described display data.
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| CN107885368A (en) * | 2016-09-30 | 2018-04-06 | 深圳深微创芯科技有限公司 | Touch display unit and electronic equipment |
| CN107885365A (en) * | 2016-09-30 | 2018-04-06 | 深圳深微创芯科技有限公司 | Touch display unit and electronic equipment |
| WO2018058667A1 (en) * | 2016-09-30 | 2018-04-05 | 深圳深微创芯科技有限公司 | Two-chip of touch display device |
| WO2018058664A1 (en) * | 2016-09-30 | 2018-04-05 | 深圳深微创芯科技有限公司 | Electronic device |
| WO2018058661A1 (en) * | 2016-09-30 | 2018-04-05 | 深圳深微创芯科技有限公司 | Driver circuit |
| CN107885369A (en) * | 2016-09-30 | 2018-04-06 | 深圳深微创芯科技有限公司 | Touch display unit and electronic equipment |
| WO2018058658A1 (en) * | 2016-09-30 | 2018-04-05 | 深圳深微创芯科技有限公司 | Driver circuit |
| CN107885396A (en) * | 2016-09-30 | 2018-04-06 | 深圳深微创芯科技有限公司 | Drive circuit |
| CN107885368B (en) * | 2016-09-30 | 2021-06-29 | 珠海中科锐博医疗科技有限公司 | Touch display device and electronic apparatus |
| CN107885372A (en) * | 2016-09-30 | 2018-04-06 | 深圳深微创芯科技有限公司 | Drive circuit |
| CN107885363A (en) * | 2016-09-30 | 2018-04-06 | 深圳深微创芯科技有限公司 | Electronic equipment |
| CN107885364A (en) * | 2016-09-30 | 2018-04-06 | 深圳深微创芯科技有限公司 | Touch display unit and electronic equipment |
| CN107885365B (en) * | 2016-09-30 | 2021-06-29 | 珠海中科锐博医疗科技有限公司 | Touch display device and electronic apparatus |
| CN107885372B (en) * | 2016-09-30 | 2021-12-28 | 珠海中科锐博医疗科技有限公司 | Driving circuit |
| CN106527834A (en) * | 2016-11-09 | 2017-03-22 | 厦门天马微电子有限公司 | Touch display panel, driving method thereof and touch display device |
| CN108984047A (en) * | 2017-06-02 | 2018-12-11 | 乐金显示有限公司 | Touch display device and method for driving the same |
| CN108984047B (en) * | 2017-06-02 | 2021-05-28 | 乐金显示有限公司 | Touch display device and method for driving the same |
| TWI689855B (en) * | 2017-11-17 | 2020-04-01 | 南韓商樂金顯示科技股份有限公司 | Touch screen apparatus and electronic device comprising the same |
| US10642420B2 (en) | 2017-11-17 | 2020-05-05 | Lg Display Co., Ltd. | Touch screen apparatus that compensates touch force using measured temperature and electronic device comprising the same |
| CN109920384A (en) * | 2017-12-12 | 2019-06-21 | 深圳深微创芯科技有限公司 | Driving chip, touch display unit and electronic equipment |
| CN109917939A (en) * | 2017-12-12 | 2019-06-21 | 深圳深微创芯科技有限公司 | Driving chip, touch display unit and electronic equipment |
| CN109920384B (en) * | 2017-12-12 | 2021-09-10 | 珠海中科锐博医疗科技有限公司 | Drive chip, touch display device, and electronic apparatus |
| CN109450423A (en) * | 2018-09-30 | 2019-03-08 | 深圳市爱协生科技有限公司 | A kind of transmit circuit and touch panel device |
| CN109450423B (en) * | 2018-09-30 | 2022-04-05 | 深圳市爱协生科技有限公司 | Transmitting circuit and touch screen equipment |
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Effective date of registration: 20220406 Address after: No. 2208, block B, building 9, zone 2, shenzhenwan science and technology ecological park, Yuehai street, Nanshan District, Shenzhen City, Guangdong Province, 518000 Applicant after: Focaltech Systems Ltd. Address before: 518055 floor 5, building 1, zone 2, honghualing Industrial Zone, Xili street, Nanshan District, Shenzhen, Guangdong (East) Applicant before: SHENZHEN MOSHI TECHNOLOGY Co.,Ltd. |
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