CN101996684A - Shift register and touch controller - Google Patents
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- CN101996684A CN101996684A CN2010105413939A CN201010541393A CN101996684A CN 101996684 A CN101996684 A CN 101996684A CN 2010105413939 A CN2010105413939 A CN 2010105413939A CN 201010541393 A CN201010541393 A CN 201010541393A CN 101996684 A CN101996684 A CN 101996684A
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Abstract
The invention relates to a touch controller which comprises a plurality of grid electrode wires, a plurality of pixels, a plurality of sensing control wires and a plurality of sensing units, wherein each pixel is electrically coupled to one of the grid electrode wires for determining whether to receive the data or not according to the potential of the grid electrode wire, and each sensing unit is electrically coupled to one of the sensing control wires for determining whether to carry out touch sensing operation or not according to the potential of the sensing control wire, wherein the touch controller also comprises a shift register string which comprises a plurality of serially connected shift registers, each shift register comprises a first output end and a second output end, the first output end provides a first clock pulse signal to one grid electrode wire for controlling the potential of the grid electrode wire, the second output end provides the second clock pulse signal to one sensing control wire for controlling the potential of the sensing control wire, and in addition, the first clock pulse signal is different from the second clock pulse signal. The invention also discloses the shift register.
Description
Technical field
The present invention relates to a kind of demonstration touch technology field, and particularly relevant for a kind of touch points scanning times determining method that shows contact panel.
Background technology
Along with development of science and technology, flat-panel screens (for example, LCD) because of have high image quality, volume is little, in light weight and advantage such as applied range, and be widely used in the various consumption electronic products such as mobile phone, notebook computer, desktop display device and TV, and little by little replaced traditional cathode-ray tube display and become the main flow of display.
Contact panel provides a kind of interface of new human-computer interaction, its in the use more intuition, more meet human nature.And contact panel and flat-panel screens are combined to be combined into the demonstration contact panel, make flat-panel screens have touch controllable function, be a kind of application trend of flat-panel screens development.
For make display product more slimming with and cost more competitive, display can trend towards adopting grid (Gate-On-Array on the array, GOA) the type gate driver circuit produces gate drive signal, and GOA type gate driver circuit generally includes a plurality of shift registers of serial connection to export a plurality of gate drive signals in regular turn, and the output of each shift register simultaneously also can be used as the initial pulse signals (Start Pulse Signal) of next stage shift register.
Yet, for the display that is integrated with capacitance type touch-control panel in the prior art, because capacitance type touch-control panel is accepted continuous clock pulse signal usually, utilize again multiplexer with this time clock signal allocation to each sensing control line as drive signal (driving signal) drive with the sensing cell of each sensing control line electric property coupling determining whether these sensing cells carry out the touch sensing operation, increase thereby cause output channel (channel) number of multiplexer to improve with the resolution of contact panel; Therefore, when the resolution of contact panel improves, the cost of multiplexer will increase substantially.
Summary of the invention
One of purpose of the present invention provides a kind of shift register, can reduce the cost of contactor control device when it is applied to contactor control device.
A further object of the present invention provides a kind of contactor control device, to reduce cost.
A kind of shift register that the embodiment of the invention proposes comprises: go up drawing-die piece, output module and stable module.Wherein, last drawing-die piece receiving inputted signal and input signal is provided the output terminal of supreme drawing-die piece.Output module possesses first output terminal and second output terminal, output module receives different first clock pulse signal and second clock pulse signal, and the output terminal of the supreme drawing-die piece of output module electric property coupling is so that whether decision provides first clock pulse signal and second clock pulse signal to first output terminal and second output terminal respectively according to the current potential on the output terminal of last drawing-die piece.The output terminal of the supreme drawing-die piece of stable module electric property coupling, first output terminal and second output terminal, stable with output terminal, first output terminal and second output terminal that in scheduled time slot, will go up the drawing-die piece to specific potential.
In an embodiment of the present invention, in the activation cycle of first clock pulse signal, the second clock pulse signal has a plurality of pulses.
In an embodiment of the present invention, above-mentioned last drawing-die piece can comprise transistor, and transistor has grid, first source/drain electrode and second source/drain electrode; Transistorized grid and first source/drain electrode receive above-mentioned input signal simultaneously, and transistorized second source/draining is the output terminal of last drawing-die piece.
In an embodiment of the present invention, above-mentioned output module can comprise the first transistor and transistor seconds; Wherein, the first transistor has grid, first source/drain electrode and second source/drain electrode, the output terminal of the supreme drawing-die piece of grid electric property coupling of the first transistor, first source of the first transistor/drain electrode receives first clock pulse signal, and second source/drain electrode of the first transistor is as first output terminal; Transistor seconds has grid, first source/drain electrode and second source/drain electrode, the output terminal of the supreme drawing-die piece of grid electric property coupling of transistor seconds, first source of transistor seconds/drain electrode receives the second clock pulse signal, and second source/drain electrode of transistor seconds is as second output terminal.
In an embodiment of the present invention, above-mentioned stable module can comprise the first transistor, transistor seconds and the 3rd transistor; Wherein, the first transistor has grid, first source/drain electrode and second source/drain electrode, the grid of the first transistor receives stablizes control signal to open the first transistor in scheduled time slot, the output terminal of first source of the first transistor/supreme drawing-die piece of drain electrode electric property coupling, second source/drain electrode of the first transistor is electrically coupled to above-mentioned specific potential; Transistor seconds has grid, first source/drain electrode and second source/drain electrode, the grid of transistor seconds receives stablizes control signal to open transistor seconds in scheduled time slot, first source/drain electrode of transistor seconds is electrically coupled to first output terminal, and second source/drain electrode of transistor seconds is electrically coupled to specific potential; The 3rd transistor has grid, first source/drain electrode and second source/drain electrode, the 3rd transistorized grid receives stablizes control signal to open the 3rd transistor in scheduled time slot, the 3rd transistorized first source/drain electrode is electrically coupled to second output terminal, and the 3rd transistorized second source/drain electrode is electrically coupled to specific potential.
A kind of contactor control device that the embodiment of the invention proposes comprises a plurality of gate lines, a plurality of pixel, a plurality of sensing control line and a plurality of sensing cell; Each pixel is electrically coupled to one of gate line and determines whether receive data with the current potential according to the gate line of institute's electric property coupling, and each sensing cell is electrically coupled to one of sensing control line and determines whether to carry out the touch sensing operation with the current potential according to the sensing control line of institute's electric property coupling.Moreover, contactor control device more comprises the shift register string, wherein the shift register string comprises a plurality of shift registers of serial connection, each shift register has first output terminal and second output terminal, first output terminal provide first clock pulse signal to one of gate line to control the current potential of this gate line, second output terminal provide the second clock pulse signal to one of sensing control line to control the current potential of this sensing control line, and first clock pulse signal is different with the second clock pulse signal (for example, in the activation cycle of first clock pulse signal, the second clock pulse signal has a plurality of pulses).
The embodiment of the invention is by (for example carrying out specific circuit design to shift register, adopt two transistors to export gate drive signal and touch-control drive signal simultaneously) and (for example arrange in pairs or groups the combined type control timing, adopt the clock pulse signal of a plurality of different frequencies), can significantly reduce because of the contact panel resolution improves the cost that produces and pay.
For above-mentioned and other purposes, feature and advantage of the present invention can be become apparent, preferred embodiment cited below particularly, and cooperate appended accompanying drawing, be described in detail below.
Description of drawings
Fig. 1 shows the structural representation of the contactor control device of the embodiment of the invention;
Fig. 2 shows the internal circuit configuration synoptic diagram of the shift register in the contactor control device shown in Figure 1;
Fig. 3 shows the sequential chart of a plurality of signals that are relevant to contactor control device shown in Figure 1.
Wherein, Reference numeral
10: contactor control device 11: display part
110: gate line 112: data line
114: pixel 13: touch control part
130: sensing control line 132: read line
134: sensing cell 15: the shift register string
SR (n), SR (n+1), SR (n+2): shift register 151: go up the drawing-die piece
153: output module 155: stable module
ST: initial pulse signals Vss: earthing potential
STN (n-1), STN (n), STN (n+1), STN (n+2), STN (n+3): gate drive signal
N (n), N (n+1), N (n+2): touch-control drive signal
CK1, CK2, XCK1, XCK2: clock pulse signal T1～T6: transistor
Q (n): enable signal DT1, DT2: activation cycle
Embodiment
See also Fig. 1, it shows the structural representation of the contactor control device of the embodiment of the invention.As shown in Figure 1, contactor control device 10 has concurrently at this and shows and touch controllable function, and it comprises display part 11, touch control part 13 and shift register string 15.Wherein, display part 11 comprises a plurality of gate lines 110, a plurality of data line 112 and a plurality of pixel 114; Gate line 110 extends along two different directions respectively with data line 112, and each pixel 114 is electrically coupled to one of gate line 110 and one of data line 112, to determine whether receive video data from data line 112 according to the current potential on the gate line 111 of institute's electric property coupling.Touch control part 13 comprises a plurality of sensing control lines 130, a plurality of read line 132 and a plurality of sensing cell 134; Sensing control line 130 extends along two different directions with read line 132, and each sensing cell 134 is electrically coupled to one of sensing control line 130 and one of read line 132, to carry out the touch sensing operation according to the current potential on the sensing control line 130 of institute's electric property coupling.When a certain sensing cell 134 carries out the touch sensing operation, from then on will touch the result on the read line 132 of 134 electric property couplings of sensing cell and read out.Need to prove that at this quantity of the gate line 110 shown in Fig. 1, data line 112, pixel 114, sensing control line 130, read line 132 and sensing cell 134 is not to be used for limiting the present invention only for illustrating.
Hold above-mentioned, for example clock pulse signal CK1, the XCK1, CK2, XCK2 and the initial pulse signals ST that provide of time schedule controller (Timing Controller) of external circuits is provided for shift register string 15, and a plurality of shift registers that comprise serial connection for example SR (n), SR (n+1) and SR (n+2).Each shift register SR (n), SR (n+1) and SR (n+2) export corresponding person among gate drive signal STN (n), STN (n+1) and the STN (n+2) and the corresponding person among touch-control drive signal N (n), N (n+1) and the N (n+2) according to two clock pulse signals (for example CK1 and CK2, perhaps XCK1 and XCK2) respectively at its two output terminal; At this, the output terminal of the output gate drive signal STN (n) of each shift register SR (n), SR (n+1) and SR (n+2), STN (n+1) and STN (n+2) is electrically coupled to the gate line 110 of display part 11, and the output terminal of its output touch-control drive signal N (n), N (n+1) and N (n+2) then is electrically coupled to the sensing control line 130 of touch control part 13.
More specifically, shift register SR (n) receive clock pulse signal CK1 and CK2 and earthing potential Vss, and accept the control of gate drive signal STN (n-1) and STN (n+1), export gate drive signal STN (n) and touch-control drive signal N (n) respectively to the gate line 110 of display part 11 and the sensing control line 130 of touch control part 13 with foundation clock pulse signal CK1 and CK2.Similarly, shift register SR (n+1) receive clock pulse signal XCK1 and XCK2 and earthing potential Vss, and accept the control of gate drive signal STN (n) and STN (n+2), export gate drive signal STN (n+1) and touch-control drive signal N (n+1) respectively to the gate line 110 of display part 11 and the sensing control line 130 of touch control part 13 with foundation clock pulse signal XCK1 and XCK2; Shift register SR (n+2) receive clock pulse signal CK1 and CK2 and earthing potential Vss, and accept the control of gate drive signal STN (n+1) and STN (n+3), export gate drive signal STN (n+2) and touch-control drive signal N (n+2) respectively to the gate line 110 of display part 11 and the sensing control line 130 of touch control part 13 with foundation clock pulse signal CK1 and CK2.
See also Fig. 2, it shows clock pulse signal CK1, XCK1, CK2 and the XCK2 that is relevant to contactor control device 10 shown in Figure 1, the sequential chart of gate drive signal STN (n), STN (n+1) and STN (n+2) and touch-control drive signal N (n), N (n+1) and N (n+2).Can learn that from Fig. 2 clock pulse signal CK2 has higher frequency compared to CK1, in the activation cycle of clock pulse signal CK1 DT1, clock pulse signal CK2 has a plurality of pulses; And in the forbidden energy cycle of clock pulse signal CK1 (not indicating among Fig. 3), clock pulse signal CK2 no pulse.Similarly, clock pulse signal XCK2 has higher frequency compared to XCK1, and in the activation cycle of clock pulse signal XCK1 DT2, clock pulse signal XCK2 has a plurality of pulses; And at the forbidden energy of clock pulse signal XCK1 in the cycle, clock pulse signal XCK2 no pulse.Moreover gate drive signal STN (n), STN (n+1) and STN (n+2) export in regular turn, and touch-control drive signal N (n), N (n+1) and also output in regular turn of N (n+2); And same shift register is for example STN (n) and for example N (n) output synchronously of touch-control drive signal of gate drive signal of SR (n) output for example.
To describe each shift register SR (n), SR (n+1) in the contactor control device 10 shown in Figure 1 and the internal circuit configuration of SR (n+2) below in detail, produce the principle of work of gate drive signal and touch-control drive signal simultaneously according to the clock pulse signal of two different frequencies so that each shift register SR (n), SR (n+1) and SR (n+2) to be described whereby.In the embodiment of the invention,, only be illustrated as representative below therefore with shift register SR (n) because each SR (n), SR (n+1) and SR (n+2) can have identical internal circuit configuration.As shown in Figure 3, shift register SR (n) comprises drawing-die piece 151, output module 153 and stable module 155.
Wherein, last drawing-die piece 151 comprises transistor T 1, transistor T 1 has grid, leakage/source electrode and source/drain electrode, the grid of transistor T 1 and leakage/source electrode receive the gate drive signal STN (n-1) of upper level shift register output simultaneously as input signal, the source/drain electrode of transistor T 1 as the output terminal of last drawing-die piece 151 with output enable signal Q (n).
Output module 153 comprises transistor T 2 and T3, transistor T 2 and T3 all have grid, leakage/source electrode and source/drain electrode, whether the grid of transistor T 2 and the T3 all output terminal of the supreme drawing-die piece 151 of electric property coupling determines turn-on transistor T2 and T3 with the current potential according to enable signal Q (n), the leakage of transistor T 2/source electrode receive clock pulse signal CK1, source/the drain electrode of transistor T 2 is as the output terminal of gate drive signal STN (n), the leakage of transistor T 3/source electrode receive clock pulse signal CK2, the source/drain electrode of transistor T 3 is as the output terminal of touch-control drive signal N (n).In the present embodiment, during enable signal Q (n) was noble potential, transistor T 2 and T3 all opened, two output terminals that clock pulse signal CK1 and CK2 are passed to output module 153 by the transistor T 2 opened and T3 respectively; And after enable signal Q (n) saltus step was electronegative potential, transistor T 2 and T3 all ended, and clock pulse signal CK1 and CK2 then stop to be passed to two output terminals of output module 153.
Hold above-mentionedly, stable module 155 comprises transistor T 4, T5 and T6; Wherein, transistor T 4, T5 and T6 all have grid, leakage/source electrode and source/drain electrode, the grid of transistor T 4, T5 and T6 all receives the gate drive signal STN (n+1) of next stage shift register output as stablizing control signal, the output terminal of the leakage of transistor T 4/supreme drawing-die piece of source electrode electric property coupling, leakage/source electrode of transistor T 5 and T6 is electrically coupled to two output terminals of output module 153 respectively, and source/drain electrode of transistor T 4, T5 and T6 all is electrically coupled to for example earthing potential Vss of specific potential.In the present embodiment, when stablizing control signal STN (n+1) for during the noble potential, transistor T 2 and T3 end, and transistor T 4, T5 and T6 all open, thereby the current potential that will go up on two output terminals of the output terminal of drawing-die piece 151 and output module 153 is pulled to earthing potential Vss.
Need to prove at this, shift register SR (n) is not limited to adopt STN (n-1) as above-mentioned input signal, also be not limited to adopt STN (n+1) as above-mentioned stable control signal, specifically adopt which kind of signal as above-mentioned input signal and stablize control signal and can set by designer's elasticity; In addition, last drawing-die piece 151, output module 153 and stable module 155 among the shift register SR (n) are not limited to circuit structure shown in Figure 3, as long as can realize that exporting gate drive signal and touch-control drive signal with different frequency simultaneously according to a plurality of clock pulse signals all can.
In sum, the embodiment of the invention can significantly reduce because of the contact panel resolution improves the cost that produces and pay by shift register being carried out specific circuit design (for example adopting two-transistor to export gate drive signal and touch-control drive signal simultaneously) and the combined type control timing of arranging in pairs or groups (for example adopting the clock pulse signal of a plurality of different frequencies).
Certainly; the present invention also can have other various embodiments; under the situation that does not deviate from spirit of the present invention and essence thereof; those of ordinary skill in the art work as can make various corresponding changes and distortion according to the present invention, but these corresponding changes and distortion all should belong to the protection domain of the appended claim of the present invention.
Claims (11)
1. a shift register is characterized in that, comprising:
Drawing-die piece on one receives an input signal, and this input signal is provided the output terminal of drawing-die piece on this;
One output module, possess one first output terminal and one second output terminal, this output module receives different one first clock pulse signal and a second clock pulse signal, whether and this output module is electrically coupled to the output terminal of drawing-die piece on this, this first clock pulse signal and this second clock pulse signal are provided respectively to this first output terminal and this second output terminal according to the current potential decision on the output terminal that should go up the drawing-die piece; And
One stable module is electrically coupled to output terminal, this first output terminal and this second output terminal of drawing-die piece on this, and is stable to a specific potential with output terminal, this first output terminal and this second output terminal that will be somebody's turn to do the drawing-die piece in a scheduled time slot.
2. shift register according to claim 1 is characterized in that, in an activation cycle of this first clock pulse signal, this second clock pulse signal has a plurality of pulses.
3. shift register according to claim 1, it is characterized in that, should go up the drawing-die piece and comprise a transistor, this transistor has grid, first source/drain electrode and second source/drain electrode, this transistorized grid and first source/drain electrode receive this input signal simultaneously, and this transistorized second source/draining is the output terminal of drawing-die piece on this.
4. shift register according to claim 1 is characterized in that, this output module comprises:
One the first transistor, have grid, first source/drain electrode and second source/drain electrode, the grid of this first transistor is electrically coupled to the output terminal of drawing-die piece on this, first source of this first transistor/drain electrode receives this first clock pulse signal, and second source/drain electrode of this first transistor is as this first output terminal; And
One transistor seconds, have grid, first source/drain electrode and second source/drain electrode, the grid of this transistor seconds is electrically coupled to the output terminal of drawing-die piece on this, first source of this transistor seconds/drain electrode receives this second clock pulse signal, and second source/drain electrode of this transistor seconds is as this second output terminal.
5. shift register according to claim 1 is characterized in that, this stable module comprises:
One the first transistor, have grid, first source/drain electrode and second source/drain electrode, the grid of this first transistor receives one and stablizes control signal to open this first transistor in this scheduled time slot, first source/drain electrode of this first transistor is electrically coupled to the output terminal of drawing-die piece on this, and second source/drain electrode of this first transistor is electrically coupled to this specific potential;
One transistor seconds, have grid, first source/drain electrode and second source/drain electrode, the grid of this transistor seconds receives should stablize control signal to open this transistor seconds in this scheduled time slot, first source/drain electrode of this transistor seconds is electrically coupled to this first output terminal, and second source/drain electrode of this transistor seconds is electrically coupled to this specific potential; And
One the 3rd transistor, have grid, first source/drain electrode and second source/drain electrode, the 3rd transistorized grid receives should stablize control signal to open the 3rd transistor in this scheduled time slot, the 3rd transistorized first source/drain electrode is electrically coupled to this second output terminal, and the 3rd transistorized second source/drain electrode is electrically coupled to this specific potential.
6. contactor control device, comprise a plurality of gate lines, a plurality of pixel, a plurality of sensing control line and a plurality of sensing cell, each these pixel is electrically coupled to one of these gate lines respectively and determines whether receive data with the current potential according to this gate line of institute's electric property coupling, each these sensing cell is electrically coupled to one of these sensing control lines and carries out the touch sensing operation with the current potential according to this sensing control line of institute's electric property coupling, it is characterized in that:
This contactor control device more comprises a shift register string, this shift register string comprises a plurality of shift registers of serial connection, each these shift register has one first output terminal and one second output terminal, this first output terminal provide one first clock pulse signal to one of these gate lines to control the current potential of this gate line, this second output terminal provide a second clock pulse signal to one of these sensing control lines controlling the current potential of this sensing control line, and this first clock pulse signal is different with this second clock pulse signal.
7. contactor control device according to claim 6 is characterized in that, in an activation cycle of this first clock pulse signal, this second clock pulse signal has a plurality of pulses.
8. contactor control device according to claim 6 is characterized in that, each these shift register comprises:
Drawing-die piece on one receives an input signal, and this input signal is provided the output terminal of drawing-die piece on this;
One output module, possess this first output terminal and this second output terminal, this output module receives this first clock pulse signal and this second clock pulse signal, whether and this output module is electrically coupled to the output terminal of drawing-die piece on this, this first clock pulse signal and this second clock pulse signal are provided respectively to this first output terminal and this second output terminal according to the current potential decision on the output terminal that should go up the drawing-die piece; And
One stable module, the output terminal, this first output terminal and this second output terminal that are electrically coupled to drawing-die piece on this are stable to a specific potential with output terminal, this first output terminal and this second output terminal that will be somebody's turn to do the drawing-die piece in a scheduled time slot.
9. contactor control device according to claim 8, it is characterized in that, should go up the drawing-die piece and comprise a transistor, this transistor has grid, first source/drain electrode and second source/drain electrode, this transistorized grid and first source/drain electrode receive this input signal simultaneously, and this transistorized second source/draining is the output terminal of drawing-die piece on this.
10. contactor control device according to claim 8 is characterized in that, this output module comprises:
One the first transistor, have grid, first source/drain electrode and second source/drain electrode, the grid of this first transistor is electrically coupled to the output terminal of drawing-die piece on this, first source of this first transistor/drain electrode receives this first clock pulse signal, and second source/drain electrode of this first transistor is as this first output terminal; And
One transistor seconds, have grid, first source/drain electrode and second source/drain electrode, the grid of this transistor seconds is electrically coupled to the output terminal of drawing-die piece on this, first source of this transistor seconds/drain electrode receives this second clock pulse signal, and second source/drain electrode of this first transistor is as this second output terminal.
11. contactor control device according to claim 8 is characterized in that, this stable module comprises:
One the first transistor, have grid, first source/drain electrode and second source/drain electrode, the grid of this first transistor receives one and stablizes control signal to open this first transistor in this scheduled time slot, first source/drain electrode of this first transistor is electrically coupled to the output terminal of drawing-die piece on this, and second source/drain electrode of this first transistor is electrically coupled to this specific potential;
One transistor seconds, have grid, first source/drain electrode and second source/drain electrode, the grid of this transistor seconds receives should stablize control signal to open this transistor seconds in this scheduled time slot, first source/drain electrode of this transistor seconds is electrically coupled to this first output terminal, and second source/drain electrode of this transistor seconds is electrically coupled to this specific potential; And
One the 3rd transistor, have grid, first source/drain electrode and second source/drain electrode, the 3rd transistorized grid receives should stablize control signal to open the 3rd transistor in this scheduled time slot, the 3rd transistorized first source/drain electrode is electrically coupled to this second output terminal, and the 3rd transistorized second source/drain electrode is electrically coupled to this specific potential.
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