CN106557210B - Driving device, touch-control driving method and touch control display system - Google Patents
Driving device, touch-control driving method and touch control display system Download PDFInfo
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- CN106557210B CN106557210B CN201510634600.8A CN201510634600A CN106557210B CN 106557210 B CN106557210 B CN 106557210B CN 201510634600 A CN201510634600 A CN 201510634600A CN 106557210 B CN106557210 B CN 106557210B
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Abstract
A kind of touch-control driving device, touch-control driving method and touch control display system.Touch control display system includes touch-control display panel, common voltage generator and touch-control driving device.Touch-control driving device includes driving circuit, capacitor and sensing circuit.The output end of driving circuit is electrically connected to the driving electrodes line of touch-control display panel.In touch-control driving period, driving circuit output drive signal to driving electrodes line.The first end of capacitor is electrically connected to the common electrode lines of multiple pixels of touch-control display panel.The input terminal of sensing circuit is electrically connected to the second end of capacitor.In touch-control driving period, sensing circuit is via capacitor senses common electrode lines, to detect the touch event of touch-control display panel.
Description
Technical field
The present invention relates to a kind of touch device, in particular to a kind of touch-control driving device, touch-control driving method and touch-control are aobvious
Show system.
Background technique
It is inner in the display panel (hereinafter referred to as touch-control display panel) of embedded touch (In-cell Touch), common electricity
Pole (common electrode, the capacitance electrode that multiple pixels are shared) is in addition to transmitting common voltage in display driving period
(common voltage) VCOM gives the liquid crystal capacitance of these pixels, and common electrode can also be used to make in touch-control driving period
For touch-control sensing electrode.In general, the manufacturing process of the display driver of touch-control display panel is all with high pressure manufacturing process
It is manufactured, that is to say, that the common voltage VCOM of common electrode may be high voltage (such as 8V).Therefore, it is coupled to common electrode
Touch-control driver (or touch-control driving device) also must be with manufactured by high pressure manufacturing process, to be resistant to common voltage VCOM
High-voltage level.Anyway, for integrated circuit manufactured by low pressure manufacturing process, high pressure manufacturing process institute
The integrated circuit of manufacture is usually very expensive.If with touch-control driver manufactured by low pressure manufacturing process (or touch-control driving
Device) collocation is with display driver manufactured by high pressure manufacturing process, then and the high voltage of common electrode may damage touch-control drive
Dynamic device.
Summary of the invention
The present invention provides a kind of touch-control driving device, touch-control driving method and touch control display system, so that touch-control driving dress
It sets and low pressure manufacturing process can be used to manufacture, and the touch-control driving device of this low pressure manufacturing process can use with high voltage
Common electrode is as touch-control sensing electrode.
The embodiment of the present invention provides a kind of touch-control driving device, including driving circuit, capacitor and sensing circuit.It drives
The output end of dynamic circuit is electrically connected to the driving electrodes line of touch-control display panel.In touch-control driving period, driving circuit output
Driving signal is to driving electrodes line.The first end of capacitor is electrically connected to the common electrode of multiple pixels of touch-control display panel
Line.The input terminal of sensing circuit is electrically connected to the second end of capacitor.In touch-control driving period, sensing circuit is via capacitor
Common electrode lines are sensed, to detect the touch event of touch-control display panel.
In one embodiment of this invention, above-mentioned common electrode lines are also electrically connected to common voltage generator.Aobvious
Show driving period, common voltage generator supplies common voltage to the common electrode of these pixels by common electrode lines, and feels
Slowdown monitoring circuit does not sense common electrode.In touch-control driving period, common voltage generator does not supply common voltage to common electrode, and
Sensing circuit senses common electrode by capacitor and common electrode lines to detect touch event.
The embodiment of the present invention provides a kind of touch-control driving method.Touch-control driving method includes: by driving circuit in touch-control
Driving period output drive signal to touch-control display panel driving electrodes line；The multiple of touch-control display panel are filtered out by capacitor
The dc component of the common electrode lines of pixel, and transmit the Alternating Component of common electrode lines；And it is driven by sensing circuit in touch-control
The Alternating Component for the common electrode lines that capacitor sensor is transmitted during dynamic, to detect the touch event of touch-control display panel.
In one embodiment of this invention, above-mentioned touch-control driving method further include: in display driving period by common electricity
Generator is pressed to supply common voltage to the common electrode of these pixels by common electrode lines, wherein sensing circuit drives in display
Period does not sense common electrode；And common voltage is not supplied to common electrode in touch-control driving period, wherein sensing circuit exists
Touch-control driving period senses common electrode by capacitor and common electrode lines to detect touch event.
The embodiment of the present invention provide a kind of touch control display system, including touch-control display panel, common voltage generator with
And touch-control driving device.Touch-control display panel includes multiple pixels, at least a driving electrodes line and at least community electrode line.
Common voltage generator is electrically connected to common electrode lines.Touch-control driving device includes driving circuit, capacitor and sensing electricity
Road.The output end of driving circuit is electrically connected to driving electrodes line, in touch-control driving period output drive signal to driving electricity
Polar curve.The first end of capacitor is electrically connected to the common electrode lines of these pixels.The input terminal of sensing circuit is electrically connected to
The second end of capacitor.In touch-control driving period, sensing circuit is aobvious to detect touch-control via capacitor senses common electrode lines
Show the touch event of panel.
In one embodiment of this invention, pass through common electrode lines in the above-mentioned common voltage generator of display driving period
Common voltage is supplied to the common electrode of these pixels, and sensing circuit does not sense common electrode.It is common in touch-control driving period
Voltage generator does not supply common voltage to common electrode, and sensing circuit passes through capacitor and the common electricity of common electrode lines sensing
Pole is to detect touch event.
In one embodiment of this invention, above-mentioned common voltage is greater than the operation voltage of sensing circuit.
Based on above-mentioned, the embodiment of the present invention using capacitor filter out touch-control display panel common electrode lines direct current at
Part, and the Alternating Component of common electrode lines is transferred to the sensing circuit of touch-control driving device.Therefore, touch-control driving device can make
It is manufactured with low pressure manufacturing process, and the touch-control driving device of this low pressure manufacturing process can use the common electricity with high voltage
Pole is as touch-control sensing electrode.
To make the foregoing features and advantages of the present invention clearer and more comprehensible, special embodiment below, and cooperate attached drawing detailed
It is described as follows.
Detailed description of the invention
Fig. 1 is the circuit layout schematic diagram for illustrating embedded touch (In-cell Touch) display panel.
Fig. 2 is the circuit box schematic diagram for illustrating a kind of touch control display system according to the embodiment of the present invention.
Fig. 3 is illustrated according to the process of the touch-control driving method of touch control display system shown in explanatory diagram of the embodiment of the present invention 2
Figure.
Fig. 4 depicts the equivalent circuit diagram that touch-control display panel shown in Fig. 2 operates in touch-control driving period.
Accompanying drawings symbol description
100: touch-control display panel
200: touch control display system
210: common voltage generator
220: touch-control driving device
221: driving circuit
222: sensing circuit
Δ CM: capacitance variation amount
C, RXC, TXC: capacitor
CE_1_1, CE_s_1, CE_1_t, CE_s_t: common electrode
CEL: common electrode lines
CM: mutual tolerance
DL: driving electrodes line
GL_1, GL_2, GL_k, GL_s, GL_s+1, GL_n: grid line
P_1_1、P_2_1、P_i_1、P_j_1、P_j+1_1、P_m_1、P_1_2、P_2_2、P_i_2、P_j_2、P_j+1_
2、P_m_2、P_1_k、P_2_k、P_i_k、P_j_k、P_j+1_k、P_m_k、P_1_h、P_2_h、P_i_h、P_j_h、P_j+1_
h、P_m_h、P_1_h+1、P_2_h+1、P_i_h+1、P_j_h+1、P_j+1_h+1、P_m_h+1、P_1_n、P_2_n、P_i_n、
P_j_n, P_j+1_n, P_m_n: pixel
RXR, TXR: resistor
S310~S330: step
SL_1, SL_2, SL_i, SL_j, SL_j+1, SL_m: source electrode line
Specific embodiment
" coupling (or connection) " word used in description of the invention full text (including claim) can refer to any
Direct or indirect connection means.For example, if it is described herein that first device coupling (or connection) then should in second device
Be construed as the first device can be directly connected to the second device or the first device can by other devices or certain
It plants connection means and is coupled indirectly to the second device.In addition, all possible places, in the drawings and embodiments using identical
Component/component/step of label represents same or like part.Identical label is used in different embodiments or uses identical term
Component/component/step can be with cross-referenced related description.
Fig. 1 illustrates embedded touch (In-cell Touch) display panel (hereinafter referred to as touch-control display panel 100)
Circuit layout schematic diagram.Touch-control display panel 100 shown in Fig. 1 is made of two substrates (Substrate), and is filled between two substrates
There is liquid crystal material as liquid crystal layer (liquid crystal layer).Touch-control display panel 100 is provided with s*t common electrode
(common electrode, such as common electrode CE_1_1, CE_s_1, CE_1_t and CE_s_t shown in Fig. 1), m source electrode line
(source line or data line, for example, source electrode line SL_1, SL_2 shown in Fig. 1 ..., SL_i ..., SL_j, SL_j+1 ...,
SL_m), n grid line (gate line or scan line, for example, gate lines G L_1, GL_2 shown in Fig. 1 ..., GL_k ...,
GL_s, GL_s+1 ..., GL_n) and m*n pixel (such as pixel P_1_1, P_2_1 shown in Fig. 1 ..., P_i_1 ..., P_j_
1、P_j+1_1、…、P_m_1、P_1_2、P_2_2、…、P_i_2、…、P_j_2、P_j+1_2、…、P_m_2、…、P_1_k、P_
2_k、…、P_i_k、…、P_j_k、P_j+1_k、…、P_m_k、…、P_1_h、P_2_h、…、P_i_h、…、P_j_h、P_j+
1_h、…、P_m_h、P_1_h+1、P_2_h+1、…、P_i_h+1、…、P_j_h+1、P_j+1_h+1、…、P_m_h+1、…、P_
1_n,P_2_n,…,P_i_n,…,P_j_n,P_j+1_n,…,P_m_n).Wherein, described s, t, i, j, m, k, s, n are integer.
Described s, t, i, j, m, k, s, n can be determined according to design requirement.
Source electrode line SL_1~SL_m is perpendicular to gate lines G L_1~GL_n.Pixel P_1_1~P_m_n is in a manner of matrix
It is distributed on touch-control display panel 100.Fig. 1 depicts the sample circuit diagram of pixel P_m_1, and other pixels are referred to pixel
P_m_1 and analogize.Gate drivers (gate driver, be not painted) be coupled to the gate lines G L_1 of touch-control display panel 100~
GL_n.Gate drivers (not being painted) can drive (scanning) gate lines G L_1 in display driving period in turn one by one
The each of~GL_n.Source electrode driver (source driver, be not painted) is coupled to the source electrode line of touch-control display panel 100
SL_1~SL_m.Cooperate the scanning sequence of gate drivers (not being painted), source electrode driver (not being painted) can drive in display
Period is by multiple pixels of source drive signal write-in touch-control display panel 100 to show image.
In touch-control driving period, common electrode CE_1_1~CE_s_t can be used to the sensing as touch-control display panel
Electrode.Driving circuit (illustrating after appearance) can be in touch-control driving period output drive signal to the driving of touch-control display panel 100
Electrode wires (such as source electrode line SL_1~SL_m or the conducting wire additionally configured), and sensing circuit (illustrating after appearance) can be in touch-control
Driving period senses common electrode CE_1_1~CE_s_t, to detect the touch event of touch-control display panel 100.
Fig. 2 is the circuit box schematic diagram for illustrating a kind of touch control display system 200 according to the embodiment of the present invention.Shown in Fig. 2
Touch control display system 200 includes touch-control display panel 100, common voltage generator 210 and touch-control driving device 220.Touch-control
Display panel 100 includes multiple pixels, at least one driving electrodes line (such as driving electrodes line DL shown in Fig. 2) and at least one
A common electrode lines (such as common electrode lines CEL shown in Fig. 2).These common electrode lines CEL is respectively coupled in a one-to-one manner
To the common electrode (such as common electrode CE_1_1~CE_s_t shown in Fig. 2) of touch-control display panel 100.Touch-control shown in Fig. 2 is aobvious
Show that pixel, driving electrodes line DL and the common electrode CE_1_1~CE_s_t of panel 100 are referred to the pixel of Fig. 1, driving
The related description of electrode wires and common electrode, so it will not be repeated.
Referring to figure 2., common voltage generator 210 is electrically connected to common electrode lines CEL, as shown in Figure 2.Touch-control driving
Device 220 includes driving circuit 221, sensing circuit 222 and at least one capacitor (such as capacitor C shown in Fig. 2).Driving
The output end of circuit 221 is respectively and electrically connected to driving electrodes line (such as Fig. 2 of touch-control display panel 100 in a one-to-one manner
Shown driving electrodes line DL).The first end of capacitor C is electrically connected to the common electrode lines CEL of touch-control display panel 100, and
The second end of capacitor C is electrically connected to the input terminal of sensing circuit 222, as shown in Figure 2.Other capacitors and common electrode lines
It is referred to the related description of capacitor C and common electrode lines CEL and analogizes, so it will not be repeated.
Fig. 3 is shown according to the process of the touch-control driving method of touch control display system 200 shown in explanatory diagram of the embodiment of the present invention 2
It is intended to.Step S310 judges that touch control display system 200 operates in touch-control driving period or display driving period.When touch-control is aobvious
When showing that system 200 operates in display driving period, step S320 is performed.When touch control display system 200 operates in touch-control
When driving period, step S330 is performed.
In step s 320, that is, in display driving period, common voltage generator 210 passes through common electrode lines (example
Common electrode lines CEL as shown in Figure 2) supply common voltage (common voltage) VCOM is total to touch-control display panel 100
With electrode CE_1_1~CE_s_t, and sensing circuit 222 does not sense common electrode CE_1_1~CE_s_t in display driving period.
Common voltage generator 210 can achieve in any way.Such as in some embodiments, common voltage generator 210 can be used
Existing common voltage generating circuit is realized.
In step S330, that is, in touch-control driving period, common voltage generator 110 does not supply common voltage VCOM
Give common electrode CE_1_1~CE_s_t.In touch-control driving period, 221 output drive signals are extremely for driving circuit (also known as TX circuit)
The driving electrodes line (such as driving electrodes line DL shown in Fig. 2) of touch-control display panel 100.According to design requirement, touch-control display surface
The driving electrodes line DL of plate 100 may be source electrode line SL_1~SL_m shown in Fig. 1, or additionally be configured at touch-control display panel
100 conducting wire (not being painted).Capacitor C can filter out the dc component of the common electrode lines CEL of touch-control display panel 100, and
The Alternating Component of common electrode lines CEL is transmitted to sensing circuit 222.Sensing circuit (also known as RX circuit) 222 drives the phase in touch-control
Between can be with the Alternating Component for the common electrode lines CEL that capacitor sensor C is transmitted.Therefore, sensing circuit 222 can drive in touch-control
Common electrode CE_1_1 is sensed via capacitor C and common electrode lines CEL during dynamic, to detect touch-control display panel 100
The touch event of common electrode CE_1_1.Other capacitors, common electrode lines and common electrode are referred to capacitor C, common
The related description of electrode wires CEL and common electrode CE_1_1 and analogize, so it will not be repeated.Driving circuit 221 and sensing circuit 222
It can achieve in any way.Such as in some embodiments, driving circuit 221 and sensing circuit 222 can be driven with existing touch-control
Dynamic circuit and existing touch control sensing circuit are realized.
In general, the manufacturing process of the source electrode driver (not being painted) of touch-control display panel 100 is manufactured with high pressure
Manufactured by technique, in order to which output HIGH voltage drives pixel P_1_1~P_m_n.For example, source electrode line SL_1~SL_m
Voltage swing (voltage swing) may be 0V to 15V, and the common voltage VCOM of common electrode CE_1_1~CE_s_t can
It can be 8V.Completely cut off the straight of the dc component of the voltage of common electrode CE_1_1 and the voltage of sensing circuit 222 based on capacitor C
Composition is flowed, the common voltage VCOM of common electrode CE_1_1~CE_s_t shown in Fig. 2 can be greater than the operation electricity of sensing circuit 222
Pressure.In this way, sensing circuit 222 can be made using low pressure manufacturing process, without have common electrode CE_1_1~
The high voltage of CE_s_t damages the problem of sensing circuit 222.For with integrated circuit manufactured by high pressure manufacturing process,
Integrated circuit manufactured by low pressure manufacturing process is usually relatively inexpensive and saves power consumption.
Fig. 4 depicts the equivalent circuit diagram that touch-control display panel 100 shown in Fig. 2 operates in touch-control driving period.Fig. 4 is drawn
Show that CM indicates the mutual tolerance (Mutual capacitance) between common electrode CE_1_1 and corresponding driving electrodes line, resistor
TXR indicate driving circuit (also known as TX circuit) 221 to electrical path between the corresponding driving electrodes line (such as Fig. 2 shown in drive
Moving electrode line DL) dead resistance, and capacitor TXC indicate driving circuit 221 between the corresponding driving electrodes line electrically
The parasitic capacitance in path (such as driving electrodes line DL shown in Fig. 2).Resistor RXR indicates sensing circuit (also known as RX circuit) 222
To the dead resistance of electrical path (such as common electrode lines CEL shown in Fig. 2) between common electrode CE_1_1, and capacitor RXC
Indicate the parasitism electricity of sensing circuit 222 to electrical path (such as common electrode lines CEL shown in Fig. 2) between common electrode CE_1_1
Hold.When Δ CM depicted in Fig. 4 indicates that object touches touch-control display panel 100 (i.e. generation touch event), the capacitance of touch points
Variable quantity.Detection mutual tolerance CM and capacitance variation amount Δ CM can know whether touch event occurs.
The capacitance of capacitor C can be determined according to design requirement.In some embodiments, the capacitance of capacitor C can be with
Capacitance much larger than mutual tolerance CM to be detected, such as capacitor C can be greater than 10 times of mutual tolerance CM.Because to be detected mutual
The capacitance for holding CM is much smaller than the capacitance of capacitor C, therefore the variation of whole equivalent capacitance value can be based on mutual tolerance CM.Therefore,
This capacitor C that connects in the sense path of sensing circuit 222 will not influence the value of our mutual tolerance CM to be detected.?
In other embodiments, the capacitance of capacitor C be can be close in mutual tolerance CM to be detected, such as the capacitance of capacitor C can be with
Less than 10 times of mutual tolerance CM.Compared with the effect that the capacitor C of low-capacitance can reach semaphore decaying, it also can inhibit the amount of noise, keep away
Exempting from external big noise causes sensing circuit 222 to be saturated.By the capacitance size of adjustment this capacitor C, to meet different designs
Demand obtains desired result.In some embodiments, capacitor C can be implemented in the same touch-control collection with sensing circuit 222
At in circuit.In further embodiments, capacitor C is also possible to the external capacitive of touch-control integrated circuit (sensing circuit 222)
Component.
In conclusion implementations described above of the present invention can use the common electricity that capacitor C filters out touch-control display panel 100
The dc component of polar curve CEL, and the Alternating Component of common electrode lines CEL is transferred to the sensing circuit of touch-control driving device 220
222.Therefore, low pressure manufacturing process can be used to manufacture for touch-control driving device 220, and the touch-control of this low pressure manufacturing process driving dress
Setting 220 can use the common electrode CE_1_1 with high voltage as touch-control sensing electrode.
Although the present invention is disclosed as above with embodiment, however, it is not to limit the invention, any common skill in this field
Art personnel, without departing from the spirit and scope of the present invention, can make a little more should and modification, therefore protection scope of the present invention with
Subject to claim.
Claims (6)
1. a kind of touch-control driving device, comprising:
One drive circuit, output end are electrically connected to a driving electrodes line of a touch-control display panel, to drive in a touch-control
Period exports a driving signal to the driving electrodes line；
One capacitor, first end are electrically connected to the community electrode line of multiple pixels of the touch-control display panel；
One sensing circuit, input terminal are electrically connected to the second end of the capacitor, in the touch-control driving period via the electricity
Container senses the common electrode lines to detect a touch event of the touch-control display panel, wherein the common electrode lines are also electric
Property be connected to a common voltage generator, supplied in the display driving period common voltage generator by the common electrode lines
One common voltage to these pixels community electrode and the sensing circuit do not sense the common electrode, and driven in the touch-control
The period common voltage generator do not supply should common voltage to the common electrode and the sensing circuit by the capacitor with should
Common electrode lines sense the common electrode to detect the touch event.
2. touch-control driving device as described in claim 1, wherein the common voltage is greater than the operation voltage of the sensing circuit.
3. a kind of touch-control driving method, comprising:
By one drive circuit in a driving electrodes line of touch-control driving period output one driving signal a to touch-control display panel；
The dc component of the community electrode line of multiple pixels of the touch-control display panel is filtered out by a capacitor, and it is total to transmit this
With the Alternating Component of electrode wires；And
The Alternating Component for the common electrode lines that the capacitor is transmitted is sensed in the touch-control driving period by a sensing circuit,
To detect a touch event of the touch-control display panel；
A common voltage is supplied to these pictures by the common electrode lines by a common voltage generator in a display driving period
The community electrode of element, wherein the sensing circuit does not sense the common electrode in the display driving period；And
The touch-control driving period do not supply should common voltage to the common electrode, wherein the sensing circuit drives the phase in the touch-control
Between by the capacitor and the common electrode lines sense the common electrode to detect the touch event.
4. touch-control driving method as claimed in claim 3, wherein the common voltage is greater than the operation voltage of the sensing circuit.
5. a kind of touch control display system, comprising:
One touch-control display panel, including multiple pixels, at least a driving electrodes line and at least community electrode line；
One common voltage generator, is electrically connected to the common electrode lines；And
One touch-control driving device, including one drive circuit, a capacitor and a sensing circuit, wherein
The output end of the driving circuit is electrically connected to the driving electrodes line to export a driving signal in a touch-control driving period
To the driving electrodes line,
The first end of the capacitor is electrically connected to the common electrode lines of these pixels, and
The input terminal of the sensing circuit be electrically connected to the second end of the capacitor in the touch-control driving period via the capacitor
Device senses the common electrode lines, to detect a touch event of the touch-control display panel,
Wherein, a common voltage is supplied to these by the common electrode lines in the display driving period common voltage generator
The community electrode of pixel and the sensing circuit do not sense the common electrode, and produce in the touch-control driving period common voltage
Raw device does not supply should common voltage be to the common electrode and the sensing circuit should by the capacitor and common electrode lines sensing
Common electrode is to detect the touch event.
6. touch control display system as claimed in claim 5, wherein the common voltage is greater than the operation voltage of the sensing circuit.
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| CN201510634600.8A CN106557210B (en) | 2015-09-30 | 2015-09-30 | Driving device, touch-control driving method and touch control display system |
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| US11061500B2 (en) * | 2019-05-06 | 2021-07-13 | Himax Technologies Limited | Touch display driving apparatus and operation method thereof |
| US11099675B1 (en) * | 2020-04-23 | 2021-08-24 | Novatek Microelectronics Corp. | Display device, operation method, driving circuit and timing control circuit |
| US11550416B2 (en) * | 2020-08-11 | 2023-01-10 | Novatek Microelectronics Corp. | Touch display device and operation method thereof |
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| CN102541328A (en) * | 2010-12-27 | 2012-07-04 | 上海天马微电子有限公司 | Touch detection method, touch detection device and touch liquid crystal display device |
| TW201344526A (en) * | 2012-04-27 | 2013-11-01 | Orise Technology Co Ltd | In-cell multi-touch display panel system |
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| CN104765519A (en) * | 2015-04-27 | 2015-07-08 | 京东方科技集团股份有限公司 | Touch detection circuit and display device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| KR101657215B1 (en) * | 2009-09-08 | 2016-09-19 | 삼성디스플레이 주식회사 | Display device including touch panel device and coupling-noise elliminating method |
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| CN102541328A (en) * | 2010-12-27 | 2012-07-04 | 上海天马微电子有限公司 | Touch detection method, touch detection device and touch liquid crystal display device |
| TW201344526A (en) * | 2012-04-27 | 2013-11-01 | Orise Technology Co Ltd | In-cell multi-touch display panel system |
| CN103988157A (en) * | 2012-12-06 | 2014-08-13 | 浦项工科大学校产学协力团 | Sensing device |
| CN104765519A (en) * | 2015-04-27 | 2015-07-08 | 京东方科技集团股份有限公司 | Touch detection circuit and display device |
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