CN201749653U - Touch-control type flat-panel display - Google Patents

Touch-control type flat-panel display Download PDF

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Publication number
CN201749653U
CN201749653U CN2009201552460U CN200920155246U CN201749653U CN 201749653 U CN201749653 U CN 201749653U CN 2009201552460 U CN2009201552460 U CN 2009201552460U CN 200920155246 U CN200920155246 U CN 200920155246U CN 201749653 U CN201749653 U CN 201749653U
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China
Prior art keywords
touch
circuit
control
display
display screen
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Expired - Fee Related
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CN2009201552460U
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Chinese (zh)
Inventor
陈其良
刘海平
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Zhidian Technology (Shenzhen) Co Ltd
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Zhidian Technology (Shenzhen) Co Ltd
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Abstract

The utility model relates to a touch screen and a flat-panel display, in particular to a touch-control type flat-panel display. The utility model discloses the touch-control type flat-panel display comprising a display screen, a drive circuit and the like; a touch control exciting source for providing touch control excitation energy is connected with the power source terminal of the final stage driving unit of the drive circuit, the output terminal of the final stage driving unit is connected with the electrode wire of the display screen, and a touch control detection circuit is used for judging whether the electrode wire of the display screen, which is connected with the driving unit, is touched or not by detecting the variations of touch control signals flowing through the power source terminal or the output terminal of the final stage driving unit. The circuit structure relations between the touch control detection circuit and the display drive circuit and between the touch control detection circuit and the display screen circuit ensure that the connection between the touch control detection circuit and the display drive circuit and the connection between the touch control detection circuit and the electrode of the display screen are simple and practicable, and influences of capacitors distributed inside the display drive circuit on the touch control signals can be avoided.

Description

A kind of touch control type flat-panel display
Technical field
The utility model relates to touch screen and flat-panel monitor, relates in particular to a kind of touch control type flat-panel display.
Background technology
The patent of invention instructions that application number is 2006100948141, name is called touch control type flat-panel display, disclosed the connected mode between a kind of touch-control detection circuit and the display screen electrode, make display screen electrode or transmitting and displaying drive signal by analog switch, or transmission and sensing touching signals, display driver and touch-control are surveyed time division multiplex display screen electrode, and the display screen electrode not only is used for display driver but also be used for the touch-control detection.The patent of invention instructions that application number is 2006101065583, name is called the flat-panel monitor with touch controllable function, disclosed the connected mode between another kind of touch-control detection circuit and the display screen electrode, make display screen electrode transmitting and displaying drive signal and transmission and sensing touching signals simultaneously by the signal loading circuit, display driver and touch-control are surveyed shared display screen electrode simultaneously, and the display screen electrode not only is used for display driver but also be used for the touch-control detection.
Utilizing the display screen electrode pair to touch to survey and locate, in fact is exactly to survey the small electrical signals that coupling capacitance is leaked between touch control object and display screen electrode.Because the touch-control detection circuit is connected with display driver circuit, coupling capacitance is quite small again between touch control object and display screen electrode, makes touch-control survey the unusual sensitivity all of the distributed capacitance on the connecting circuit of the distributed capacitance of display driver circuit inside and stray capacitance, touch-control detection circuit and display driver circuit.The rational connectivity scenario of touch-control detection circuit and display driver circuit, the reasonably setting of sampled point, to getting rid of the interference of distributed capacitance and stray capacitance, realization utilizes the display screen electrode to carry out the detection and the location of touch-control, flat-panel monitor and touch screen are united two into one, and it is most important to make flat-panel monitor become touch control type flat-panel display.
Touch control type flat-panel display has display screen and driving circuit, comprise display driver circuit and touch-control detection circuit in the driving circuit again, display driver circuit comprises demonstration driving source, display timing generator control circuit and shows signal gating circuit, and the touch-control detection circuit comprises touch-control source and touch-control metering circuit.The touch-control detection circuit is connected with the reasonable of display driver circuit, and control realizes the cost of touch control type flat-panel display, also is the work that has very much value.
The utility model content
The utility model is exactly for the circuit structure of setting up touch-control detection circuit and display driver circuit and display screen electrode concerns, realizes that the touch-control excitation is connected with the simple and direct, reasonable of display driver and display screen electrode wires, and effective touch control detection.
Technical matters of the present utility model is solved by following technical scheme:
A kind of touch control type flat-panel display, form by display screen and driving circuit etc., comprise display driver circuit, control circuit, gating circuit or loaded circuit, touch-control driving source and touch-control detection circuit in the driving circuit again, display driver circuit comprises display drive source, signal selection and output circuit; Each output terminal of driving circuit connects each electrode wires of display screen respectively.The touch-control driving source of touch-control excitation energy is provided, connects the power end of driving circuit afterbody driver element; The afterbody driver element has an active component at least, output terminal connects the display screen electrode wires; The touch-control detection circuit judges by the flow through variation of touching signals of afterbody driver element power end or output terminal of detection whether the display screen electrode wires that is connected with driver element is touched.
Technical matters of the present utility model is further solved by following technical scheme:
The power end of driver element can be the positive power source terminal of driver element in the driving circuit that described touch-control driving source connects, and also can be the negative power end of driver element.
The power end of afterbody driver element in the driving circuit that described each electrode wires of display screen is connected, be connected with the touch-control driving source that the touch-control excitation energy is provided with the display drive source that the display driver energy is provided by gating circuit respectively, gating circuit makes the power end of driver element, or be communicated with display drive source, driving circuit is to the display screen electrode wires transmitting and displaying drive signal that links to each other; Or be communicated with the touch-control driving source, driving circuit is to the display screen electrode wires transmission touching signals that links to each other.
The touch-control detection circuit detects the sampled point of touching signals, is arranged between touch-control driving source and the gating circuit, or is arranged between gating circuit and the driver element power end, or be arranged between the multistage gating circuit, or be arranged on the output terminal of driver element.
The power end of afterbody driver element in the driving circuit that described each electrode wires of display screen is connected, respectively by the signal loading circuit unit, be connected with the touch-control driving source that the touch-control excitation energy is provided with the display drive source that the display driver energy is provided, driving circuit to the subordinate's circuit that links to each other at last until display screen electrode wires transmitting and displaying drive signal and touching signals simultaneously.
Described signal loading circuit is by gating circuit or directly is connected with the touch-control driving source.
The touch-control detection circuit detects the sampled point of touching signals, be arranged between touch-control driving source and the gating circuit, or be arranged between gating circuit and the signal loading circuit, or be arranged between signal loading circuit and the driver element power end, or be arranged on the output terminal of driver element.
The described touch-control driving source that the touch-control excitation energy is provided with provide the display drive source of display driver energy to share same power supply, the power end of driver element share the source with display driver and touch-control excitation and is connected in the driving circuit, driving circuit to the subordinate's circuit that links to each other at last until display screen electrode wires while or timesharing transmitting and displaying drive signal and touching signals.
The power end of interior each driver element of the driving circuit that described each electrode wires of display screen is connected is by gating circuit or directly share the source with display driver and touch-control excitation is connected.
The touch-control detection circuit detects the sampled point of touching signals, is arranged on the excitation of display driver and touch-control and share between source and the gating circuit, or be arranged between gating circuit and the driver element power end, or be arranged on the output terminal of driver element.
It is independent current source that the source is share in described display driver and touch-control excitation, or the independent output terminal in the power output end.
Described gating circuit is single-stage or the multistage gating circuit that has an active component at least.
Described touch-control driving source be direct supply, also can be alternating source, also can be the alternating current-direct current AC-battery power source.
When described touch-control driving source is direct supply, the output terminal of afterbody driver element in the driving circuit, output follow the alternating signal of input end and the touching signals of alternation to the display screen electrode wires.
When described touch-control driving source is alternating source, the output terminal of afterbody driver element in the driving circuit, output by the input end gating, from the alternation touching signals of power end to the display screen electrode wires.
The touching signals sample circuit of described touch-control detection circuit is a passive element, or active component, or the circuit unit of a plurality of element composition.
Described driving circuit afterbody driver element output terminal is not less than 50kHz to the frequency of the touching signals of display screen electrode wires output.
Described touch-control detection circuit detects the touching signals that flows into the driver element power end that is linked to each other with the touch-control driving source, detection be at least a in current signal and the voltage signal.
Described touch-control detection circuit detects the touching signals that flows into the driver element power end that is linked to each other with the touch-control driving source, detection be at least a in amplitude, time, phase place, frequency signal and the umber of pulse.
The beneficial effect that the utility model is compared with the prior art is:
The mode that the utility model disclosed is the circuit structure relation of quite concrete touch-control detection circuit and display driver circuit and display screen electrode, make the touch-control detection circuit reasonable with being connected of display driver circuit and display screen electrode, even also utilized selection and the output circuit part in the display driver circuit dexterously, allow the simple possible that is connected of touch-control detection circuit and display driver circuit and display screen electrode.The simple connected mode of touch-control detection circuit and display driver circuit, can reduce the distributed capacitance on touch-control detection circuit and the display driver circuit connecting circuit again as much as possible, prevent that distributed capacitance from surveying the interference of the electric signal that coupling capacitance is leaked between touch control object and display screen electrode to the touch-control detection circuit.
The touch-control detection circuit that the utility model disclosed and the circuit connecting mode of display driver circuit, the touch-control driving source provides the port of display driver energy from display driver circuit, the power end that is driving circuit afterbody driver element inserts display driver circuit, provide the touch-control pumping signal to the display screen electrode, even touch-control excitation and the shared same energy source of display driver, can reduce in the driving circuit the inner distributed capacitance of front stage circuits and stray capacitance to the influence of touch-control detection.The reasonably setting of sampled point also is the effective ways that reduce the influence that the inner distributed capacitance of driving circuit and stray capacitance survey touch-control.And the connected mode that is disclosed can allow the different electrode wires of display screen be communicated with the touch-control driving source simultaneously, can detect the touching signals that flows through the different electrode wires of display screen again respectively.Set up the Rule of judgment of the polar curve that reasonably gets an electric shock, can allow touch control type flat-panel display of the present utility model allow multi-point touch simultaneously.
For computer, the flat-panel monitor that mobile phone etc. use, the display screen electrode is huge many, when display driver and touch-control detection time division multiplex display screen electrode, want to allow touch control type flat-panel display not produce the flicker of demonstration, it is very short to allow touch-control survey the shared time, at first will allow the touch-control driving source on display panel, set up stable touching signals fast enough, and the touch-control driving source is from the power end access display driver circuit of driving circuit afterbody driver element, provide the touch-control pumping signal to the display screen electrode, utilize the driving force of afterbody driver element, setting up stable touching signals fast on display panel, is simple but effective method.
The touch-control detection circuit that is disclosed and the circuit connecting mode of display driver circuit have utilized the internal circuit unit of display driver circuit fully, allow touch control type flat-panel display be able to realize on low cost.
Description of drawings
Fig. 1 is the synoptic diagram that is electrically connected of the utility model embodiment one;
Fig. 2 is the synoptic diagram that is electrically connected of the utility model embodiment two;
Fig. 3 is the synoptic diagram that is electrically connected of the utility model embodiment three;
Fig. 4 is the synoptic diagram that is electrically connected of the utility model embodiment four;
Fig. 5 is the synoptic diagram that is electrically connected of the utility model embodiment five;
Fig. 6 is the synoptic diagram that is electrically connected of the utility model embodiment six;
Fig. 7 is the synoptic diagram that is electrically connected of the utility model embodiment seven;
Fig. 8 is the synoptic diagram that is electrically connected of the utility model embodiment eight;
Fig. 9 is the synoptic diagram that is electrically connected of the utility model embodiment nine;
Figure 10 is the synoptic diagram that is electrically connected of the utility model embodiment ten;
Figure 11 is the synoptic diagram that is electrically connected of the utility model embodiment 11;
Figure 12 is the synoptic diagram that is electrically connected of the utility model embodiment 12;
Figure 13 is the synoptic diagram that is electrically connected of the utility model embodiment 13;
Figure 14 is the synoptic diagram that is electrically connected of the utility model embodiment 14;
Figure 15 is the synoptic diagram that is electrically connected of the utility model embodiment 15;
Figure 16 is the synoptic diagram that is electrically connected of the utility model embodiment 16.
Embodiment
Flat-panel monitor has multiple, with LCD (LCD) is example, passive liquid crystal display, such as distortion (Twist Nematic, be called for short TN) type LCD (TN-LCD) and supertwist (SuperTwist Nematic, be called for short STN) type LCD (STN-LCD), have reading scan electrode wires or shows signal electrode wires (being row electrode lines) on the general lower baseplate glass, upper substrate is on glass to have shows signal electrode wires or reading scan electrode wires (i.e. row electrode wires), and cross section is display element.Active-matrix liquid crystal display, such as thin film transistor (TFT) (Thin Film Transistor, abbreviation TFT) LCD (TFT-LCD) generally comprises tft array, the display element array that is positioned on the base plate glass, with the reading scan electrode wires (being row electrode lines) that the Gate of TFT extremely links to each other, the shows signal electrode wires (i.e. row electrode wires) that links to each other with source electrode or the drain electrode of TFT; With the color filter film and the public electrode that are positioned on another base plate glass.And plasma display (PDP), active and passive organic light emitting diode display (OLED) wait other flat-panel monitors, have reading scan electrode wires and shows signal electrode wires (being the ranks electrode wires) equally.
The touch control type flat-panel display that the utility model disclosed, form by display screen and driving circuit etc., comprise display driver circuit, control circuit, gating circuit or loaded circuit, touch-control driving source and touch-control detection circuit in the driving circuit again, display driver circuit comprises display drive source, signal selection and output circuit; Each output terminal of driving circuit connects each strip electrode line of display screen respectively.Rely on the touch-control detection circuit be connected with display driver circuit, the row-column electrode line of flat-panel monitor is carried out touch-control survey, display driver and touch-control are surveyed multiplexing display screen electrode, allow flat-panel monitor realize the touch-control detection normal the demonstration.
Embodiment one
Touch control type flat-panel display 100 as shown in Figure 1 comprises display screen 110, driving circuit 120.Driving circuit 120 comprises control circuit 121, the display drive source 122 of display driver energy is provided, provide the touch-control excitation energy touch-control driving source 123, signal selects and output circuit 124, touch-control detection circuit 125, gating circuit 126 etc.Display screen 110 has display screen line electrode 111 and row electrode 112 etc.The afterbody driver element 1241,1242 of signal selection and output circuit 124 ..., 124N, the afterbody driver element of driving circuit 120 just, its input end connects front stage circuits 1240, and its output terminal connects each electrode wires of display screen line electrode 111 and row electrode 112; Its power end 12410,12420 ..., 124N0 connects each output terminal of gating circuit 126 respectively, an input end 1261 of gating circuit 126 connects display drive source 122, another input end 1262 of gating circuit 126 connects touch-control driving sources 123 by the touching signals sampling unit 1251 of touch-control detection circuit 125, each output terminal of gating circuit 126 or be communicated with input end 1261 or be communicated with input end 1262.Touching signals sampling unit 1251 connects touch-control detection circuit 125, and touch-control detection circuit 125 detects the variation of touching signals on the sampling unit.Control circuit 121 allow gating circuit 126 make afterbody driver element 1241,1242 ..., 124N power end 12410,12420 ..., 124N0, or be communicated with display drive source 122, carry display drive signals to the display screen line electrode 111 that is connected and row electrode 112 each electrode wires; Or be communicated with touch-control driving source 123, carry touching signals to the display screen line electrode 111 that is connected and row electrode 112 each electrode wires.Each bar connecting line among Fig. 1 has more than and represents single line to connect, and also represents multi-thread annexation.
Above-mentioned touch control type flat-panel display is worked as follows:
In the display driver period, gating circuit 126 in the driving circuit 120, make afterbody driver element 1241,1242 ..., 124N power end 12410,12420 ..., 124N0 is communicated with display drive source 122, control circuit 121 allows signal select to carry display drive signals with output circuit 124 to display screen line electrode 111 that is connected and row electrode 112, and display screen 110 is in the display driver state.
Survey the period at touch-control, control circuit 121 allows gating circuit 126, make afterbody driver element 1241,1242 ..., 124N power end 12410,12420 ..., 124N0, be communicated with touch-control driving source 123 by touching signals sampling unit 1251 one by one, signal is selected and output circuit 124 is carried touching signals one by one to each electrode wires of display screen line electrode 111 and row electrode 112.Touch-control detection circuit 125 is by detecting the variation of touching signals on the touching signals sampling unit 1251, judges whether display screen 110 is touched, the position of which row-column electrode line is touched, and display screen 110 is in the touch-control acquisition mode.By the point of crossing that the quilt that detects touches row electrode lines and touched the row electrode wires, determine by contact position.
Allow touch control type flat-panel display 100 intersegmental conversion when display driver period and touch-control are surveyed repeatedly, display driver and touch-control are surveyed time division multiplex display screen electrode, not only can show but also the touch control type flat-panel display of touch-control but form.
Judge the condition of the polar curve that gets an electric shock, can detect the touching signals of flowing through change maximum, and the electrode wires that surpasses certain setting threshold be the polar curve that gets an electric shock; Can be not yet with detect the touching signals of flowing through change maximum, and the electrode wires that surpasses certain setting threshold be the polar curve that gets an electric shock, and only with detect the touching signals of flowing through change surpass certain setting threshold electrode wires for geting an electric shock polar curve, allow touch control type flat-panel display allow the while multi-point touch.
Making the display screen electrode or be communicated with the transmitting and displaying drive signal with display driver circuit or be communicated with the gating circuit that transmits touching signals with the touch-control detection circuit, can be multiway analog switch, also can be other circuit that play gate action.
The touching signals sampling unit can be the passive device of single resistance or electric capacity or inductance, also can be the combination of multiple passive device, also can be single active device, also can be the circuit unit with active device.
Embodiment two
Touch control type flat-panel display 200 as shown in Figure 2 comprises display screen 210, driving circuit 220.Driving circuit 220 comprises control circuit 221, the display drive source 222 of display driver energy is provided, provide the touch-control excitation energy touch-control driving source 223, signal selects and output circuit 224, touch-control detection circuit 225, gating circuit 226 etc.Display screen 210 has display screen line electrode 211 and row electrode 212 etc.The afterbody driver element 2241,2242 of signal selection and output circuit 224 ..., 224N, the afterbody driver element of driving circuit 220 just, its input end connects front stage circuits 2240, and its output terminal connects each electrode wires of display screen line electrode 211 and row electrode 212; Its power end 22410,22420 ..., 224N0 connects each output terminal of gating circuit 226 respectively, an input end 2261 of gating circuit 226 connects display drive source 222, another input end 2262 of gating circuit 226 connects touch-control driving sources 223, each output terminal of gating circuit 226 or be communicated with input end 2261 or be communicated with input end 2262.The sampled point 2251 of touch-control detection circuit 225 is set between 2262 ends of gating circuit 226 and touch-control driving source 223, connects touch-control detection circuit 225.Touch-control detection circuit 225 detects the variation of current potential on the sampled points, and the reference end points of potential measurement can be located at the common of driving circuit 220, also can be located at a certain specific reference point of driving circuit 220.Control circuit 221 allow gating circuit 226 make afterbody driver element 2241,2242 ..., 224N power end 22410,22420 ..., 224N0, or be communicated with display drive source 222, carry display drive signals to the display screen line electrode 211 that is connected and row electrode 212 each electrode wires; Or be communicated with touch-control driving source 223, carry touching signals to the display screen line electrode 211 that is connected and row electrode 212 each electrode wires.Each bar connecting line among Fig. 2 has more than and represents single line to connect, and also represents multi-thread annexation.
Above-mentioned touch control type flat-panel display is worked as follows:
In the display driver period, gating circuit 226 in the driving circuit 220, make afterbody driver element 2241,2242 ..., 224N power end 22410,22420 ..., 224N0 is communicated with display drive source 222, control circuit 221 allows signal select to carry display drive signals with output circuit 224 to display screen line electrode 211 that is connected and row electrode 212, and display screen 210 is in the display driver state.
Survey the period at touch-control, control circuit 221 allows gating circuit 226, make afterbody driver element 2241,2242 ..., 224N power end 22410,22420 ..., 224N0, sampled point 2251 by touch-control detection circuit 225 is communicated with touch-control driving source 223 one by one, and signal is selected and output circuit 224 is carried touching signals one by one to each electrode wires of display screen line electrode 211 and row electrode 212.Touch-control detection circuit 225 is by detecting the variation of touching signals on the sampled point 2251, judges whether display screen 210 is touched, the position of which row-column electrode line is touched, and display screen 210 is in the touch-control acquisition mode.By the point of crossing that the quilt that detects touches row electrode lines and touched the row electrode wires, determine by contact position.
Allow touch control type flat-panel display 200 intersegmental conversion when display driver period and touch-control are surveyed repeatedly, display driver and touch-control are surveyed time division multiplex display screen electrode, not only can show but also the touch control type flat-panel display of touch-control but form.
Judge the condition of the polar curve that gets an electric shock, can detect the touching signals of flowing through change maximum, and the electrode wires that surpasses certain setting threshold be the polar curve that gets an electric shock; Can be not yet with detect the touching signals of flowing through change maximum, and the electrode wires that surpasses certain setting threshold be the polar curve that gets an electric shock, and only with detect the touching signals of flowing through change surpass certain setting threshold electrode wires for geting an electric shock polar curve, allow touch control type flat-panel display allow the while multi-point touch.
Making the display screen electrode or be communicated with the transmitting and displaying drive signal with display driver circuit or be communicated with the gating circuit that transmits touching signals with the touch-control detection circuit, can be multiway analog switch, also can be other circuit that play gate action.
Embodiment three
Touch control type flat-panel display 300 as shown in Figure 3 comprises display screen 310, driving circuit 320.Driving circuit 320 comprises control circuit 321, the display drive source 322 of display driver energy is provided, provide the touch-control excitation energy touch-control driving source 323, signal selects and output circuit 324, touch-control detection circuit 325, gating circuit 326 etc.Display screen 310 has display screen line electrode 311 and row electrode 312 etc.The afterbody driver element 3241,3242 of signal selection and output circuit 324 ..., 324N, the afterbody driver element of driving circuit 320 just, its input end connects front stage circuits 3240, and its output terminal connects each electrode wires of display screen line electrode 311 and row electrode 312; Its power end 32410,32420 ..., 324N0 connects each output terminal of gating circuit 326 respectively, an input end 3261 of gating circuit 326 connects display drive source 322, another input end 3262 of gating circuit 326 connects touch-control driving sources 323, each output terminal of gating circuit 326 or be communicated with input end 3261 or be communicated with input end 3262.Signal select and output circuit 324 afterbody driver elements 3241,3242 ..., 324N output terminal separately be provided with touch-control detection circuit 325 sampled point 3251,3252 ..., 325N, connect touch-control detection circuit 325.Touch-control detection circuit 325 detects the variation of current potential on the sampled point, the reference end points of potential measurement, can be located at the output terminal of touch-control driving source 323, also can be located at the common of driving circuit 320, also can be located at a certain specific reference point of driving circuit 320.Control circuit 321 allow gating circuit 326 make afterbody driver element 3241,3242 ..., 324N power end 32410,32420 ..., 324N0, or be communicated with display drive source 322, carry display drive signals to the display screen line electrode 311 that is connected and row electrode 312 each electrode wires; Or be communicated with touch-control driving source 323, carry touching signals to the display screen line electrode 311 that is connected and row electrode 312 each electrode wires.Each bar connecting line among Fig. 3 has more than and represents single line to connect, and also represents multi-thread annexation.
Above-mentioned touch control type flat-panel display is worked as follows:
In the display driver period, gating circuit 326 in the driving circuit 320, make afterbody driver element 3241,3242 ..., 324N power end 32410,32420 ..., 324N0 is communicated with display drive source 322, control circuit 321 allow signal select with output circuit 324 to display screen line electrode 311 that is connected and row electrode 312 transmitting and displaying drive signals, display screen 310 is in the display driver state.
Survey the period at touch-control, control circuit 321 allows gating circuit 326, make afterbody driver element 3241,3242 ..., 324N power end 32410,32420 ..., 324N0 is communicated with touch-control driving source 323, signal is selected and output circuit 324 is carried touching signals simultaneously to each electrode wires of display screen line electrode 311 and row electrode 312.Touch-control detection circuit 325 is by the mode of sampling simultaneously or the mode of scanning sample, detect respectively each driver element 3241,3242 ..., the set sampled point 3251,3252 of 324N output terminal ..., the last touching signals of 325N variation, judge whether display screen 310 is touched, the position of which row-column electrode line is touched, display screen 310 is in the touch-control acquisition mode.By the point of crossing that the quilt that detects touches row electrode lines and touched the row electrode wires, determine by contact position.
Allow touch control type flat-panel display 300 intersegmental conversion when display driver period and touch-control are surveyed repeatedly, display driver and touch-control are surveyed time division multiplex display screen electrode, not only can show but also the touch control type flat-panel display of touch-control but form.
Judge the condition of the polar curve that gets an electric shock, can detect the touching signals of flowing through change maximum, and the electrode wires that surpasses certain setting threshold be the polar curve that gets an electric shock; Can be not yet with detect the touching signals of flowing through change maximum, and the electrode wires that surpasses certain setting threshold be the polar curve that gets an electric shock, and only with detect the touching signals of flowing through change surpass certain setting threshold electrode wires for geting an electric shock polar curve, allow touch control type flat-panel display allow the while multi-point touch.
Making the display screen electrode or be communicated with the transmitting and displaying drive signal with display driver circuit or be communicated with the gating circuit that transmits touching signals with the touch-control detection circuit, can be multiway analog switch, also can be other circuit that play gate action.
Embodiment four
Touch control type flat-panel display 400 as shown in Figure 4 comprises the active display screen 410 of thin film transistor (TFT) (TFT), driving circuit 420.Driving circuit 420 comprises control circuit 421, the display drive source 422 of display driver energy is provided, provide the touch-control excitation energy touch-control driving source 423, signal selects and output circuit 424, touch-control detection circuit 425, analog switch group 426 and 427 etc.Display screen 410 has display screen line electrode 411, row electrode 412 and public electrode 413 etc.As signal select and the operational amplifier 4241,4242 of output circuit 424 afterbody driver elements ..., 424N, the afterbody driver element of driving circuit 420 just, its input end connects front stage circuits 4240, and its output terminal connects each electrode wires and the public electrode 413 of display screen tft array column electrode 411 and row electrode 412; Its power end 42410,42420 ..., 424N0 connects each output terminal of simulation switches set 426, an input end of analog switch group 426 each switch connects display drive source 422, and another input end of analog switch group 426 each switch connects the output terminal of simulation switches set 427; 427 1 input ends of analog switch group connect touch-control driving source 423 through the touching signals sampling element 4251 of touch-control detection circuit 425, and another input end directly connects touch-control driving source 423.Touching signals sampling element 4251 connects touch-control detection circuit 425, and touch-control detection circuit 425 detects the variation of touching signals on the sampling element.Control circuit 421 allows analog switch group 426 and 427, make operational amplifier 4241,4242 as the afterbody driver element ..., 424N power end 42410,42420 ..., 424N0, or be communicated with display drive source 422, carry display drive signals to the display screen line electrode 411 that is connected and row electrode 412 each electrode wires and public electrode 413; Or be communicated with touch-control driving source 423, carry touching signals to the display screen line electrode 411 that is connected and row electrode 412 each electrode wires and public electrode 413.Each bar connecting line among Fig. 4 has more than and represents single line to connect, and also represents multi-thread annexation.
Above-mentioned touch control type flat-panel display is worked as follows:
In the display driver period, analog switch group 426 in the driving circuit 420, make operational amplifier 4241,4242 as the afterbody driver element ..., 424N power end 42410,42420 ..., 424N0 is communicated with display drive source 422, control circuit 421 allow signal select and output circuit 424 to the display screen electrode 411 that is connected and 412 and public electrode 413 conveying display drive signals, display screen 410 is in the display driver state.
Survey the period at touch-control, control circuit 421 allows analog switch group 426, make operational amplifier 4241,4242 as the afterbody driver element ..., 424N power end 42410,42420 ..., 424N0 is communicated with analog switch group 427, again by analog switch group 427, each power end that only allows an afterbody driver element, also can allow the power end of a plurality of afterbody driver elements at every turn, be communicated with touch-control driving source 423 by touching signals sampling element 4251; The power end of remaining afterbody driver element directly is communicated with touch-control driving source 423; Signal is selected and output circuit 424 is carried touching signals simultaneously to display screen line electrode 411 and row electrode 412 each electrode wires and public electrode 413.Touch-control detection circuit 425 is by detecting the variation of touching signals on the touching signals sampling element 4251 one by one, judges whether display screen 410 is touched, the position of which row-column electrode line is touched, and display screen 410 is in the touch-control acquisition mode.By the point of crossing that the quilt that detects touches row electrode lines and touched the row electrode wires, determine by contact position.
Allow touch control type flat-panel display 400 intersegmental conversion when display driver period and touch-control are surveyed repeatedly, display driver and touch-control are surveyed time division multiplex display screen electrode, not only can show but also the touch control type flat-panel display of touch-control but form.
Judge the condition of the polar curve that gets an electric shock, can detect the touching signals of flowing through change maximum, and the electrode wires that surpasses certain setting threshold be the polar curve that gets an electric shock; Can be not yet with detect the touching signals of flowing through change maximum, and the electrode wires that surpasses certain setting threshold be the polar curve that gets an electric shock, and only with detect the touching signals of flowing through change surpass certain setting threshold electrode wires for geting an electric shock polar curve, allow touch control type flat-panel display allow the while multi-point touch.
The touching signals sampling unit can be the passive device of single resistance or electric capacity or inductance, also can be the combination of multiple passive device, also can be single active device, also can be the circuit unit with active device.
Embodiment five
Touch control type flat-panel display 500 as shown in Figure 5 comprises the active display screen 510 of thin film transistor (TFT) (TFT), driving circuit 520.Driving circuit 520 comprises control circuit 521, the display drive source 522 of display driver energy is provided, provide the touch-control excitation energy touch-control driving source 523, signal selects and output circuit 524, touch-control detection circuit 525, analog switch group 526 etc.Display screen 510 has display screen line electrode 511, row electrode 512 and public electrode 513 etc.As signal select and the operational amplifier 5241,5242 of output circuit 524 afterbody driver elements ..., 524N, the afterbody driver element of driving circuit 520 just, its input end connects front stage circuits 5240, and its output terminal connects each electrode wires and the public electrode 513 of display screen tft array column electrode 511 and row electrode 512; Its power end 52410,52420 ..., 524N0 connects each output terminal of simulation switches set 526, an input end of analog switch group 526 each switch connects display drive source 522, and another input end of analog switch group 526 each switch connects touch-control driving source 523.Swash between the source 523 at analog switch group 526 and touch-control, be provided with correspond respectively to operational amplifier 5241,5242 ..., 524N touch-control detection circuit 525 sampled point 5251,5252 ..., 525N, connect touch-control detection circuit 525.Touch-control detection circuit 525 detects the variation of current potential on the sampled points, and the reference end points of potential measurement can be located at the common of driving circuit 520, also can be located at a certain specific reference point of driving circuit 520.Control circuit 521 allows analog switch group 526, make operational amplifier 5241,5242 as the afterbody driver element ..., 524N power end 52410,52420 ..., 524N0, or be communicated with display drive source 522, carry display drive signals to the display screen line electrode 511 that is connected and row electrode 512 each electrode wires and public electrode 513; Or be communicated with touch-control driving source 523, carry touching signals to the display screen line electrode 511 that is connected and row electrode 512 each electrode wires and public electrode 513.Each bar connecting line among Fig. 5 has more than and represents single line to connect, and also represents multi-thread annexation.
Above-mentioned touch control type flat-panel display is worked as follows:
In the display driver period, analog switch group 526 in the driving circuit 520, make operational amplifier 5241,5242 as the afterbody driver element ..., 524N power end 52410,52420 ..., 524N0 is communicated with display drive source 522, control circuit 521 allow signal select and output circuit 524 to the display screen tft array electrode 511 that is connected and 512 and public electrode 513 conveying display drive signals, display screen 510 is in the display driver state.
Survey the period at touch-control, control circuit 521 allows analog switch group 526, make operational amplifier 5241,5242 as the afterbody driver element ..., 524N power end 52410,52420 ..., 524N0 is communicated with touch-control driving source 523, signal is selected and output circuit 524 is carried touching signals simultaneously to display screen line electrode 511 and row electrode 512 each electrode wires and public electrode 513.Touch-control detection circuit 525 is by the mode of sampling simultaneously or the mode of scanning sample, detect respectively 523 each set sampled points 5251,5252 of analog switch group 526 and touch-control driving source ..., the last touching signals of 525N variation, judge whether display screen 510 is touched, the position of which row-column electrode line is touched, display screen 510 is in the touch-control acquisition mode.By the point of crossing that the quilt that detects touches row electrode lines and touched the row electrode wires, determine by contact position.
Allow touch control type flat-panel display 500 intersegmental conversion when display driver period and touch-control are surveyed repeatedly, display driver and touch-control are surveyed time division multiplex display screen electrode, not only can show but also the touch control type flat-panel display of touch-control but form.
Judge the condition of the polar curve that gets an electric shock, can detect the touching signals of flowing through change maximum, and the electrode wires that surpasses certain setting threshold be the polar curve that gets an electric shock; Can be not yet with detect the touching signals of flowing through change maximum, and the electrode wires that surpasses certain setting threshold be the polar curve that gets an electric shock, and only with detect the touching signals of flowing through change surpass certain setting threshold electrode wires for geting an electric shock polar curve, allow touch control type flat-panel display allow the while multi-point touch.
Embodiment six
Touch control type flat-panel display 600 as shown in Figure 6 comprises the active display screen 610 of thin film transistor (TFT) (TFT), driving circuit 620.Driving circuit 620 comprises control circuit 621, the display drive source 622 of display driver energy is provided, provide the touch-control excitation energy touch-control driving source 623, signal selects and output circuit 624, touch-control detection circuit 625, analog switch group 626 etc.Display screen 610 has display screen line electrode 611, row electrode 612 and public electrode 613 etc.As signal select and the operational amplifier 6241,6242 of output circuit 624 afterbody driver elements ..., 624N, the afterbody driver element of driving circuit 620 just, its input end connects front stage circuits 6240, and its output terminal connects each electrode wires and the public electrode 613 of display screen tft array column electrode 611 and row electrode 612; Its power end 62410,62420 ..., 624N0 connects the output terminal of simulation switches set 626, an input end of analog switch group 626 connects display drive source 622, another input end of analog switch group 626 connects touch-control driving source 623.Signal select and the operational amplifier 6241,6242 of output circuit 624 afterbody driver elements ..., 624N output terminal separately be provided with touch-control detection circuit 625 sampled point 6251,6252 ..., 625N, connect touch-control detection circuit 625.Touch-control detection circuit 625 detects the variation of current potential on the sampled point, the reference end points of potential measurement, can be located at the output terminal of touch-control driving source 623, also can be located at the common of driving circuit 620, also can be located at a certain specific reference point of driving circuit 620.Control circuit 621 allows analog switch group 626, make operational amplifier 6241,6242 as the afterbody driver element ..., 624N power end 62410,62420 ..., 624N0, or be communicated with display drive source 622, carry display drive signals to the display screen line electrode 611 that is connected and row electrode 612 each electrode wires and public electrode 613; Or be communicated with touch-control driving source 623, carry touching signals to the display screen line electrode 611 that is connected and row electrode 612 each electrode wires and public electrode 613.Each bar connecting line among Fig. 6 has more than and represents single line to connect, and also represents multi-thread annexation.
Above-mentioned touch control type flat-panel display is worked as follows:
In the display driver period, analog switch group 626 in the driving circuit 620, make operational amplifier 6241,6242 as the afterbody driver element ..., 624N power end 62410,62420 ..., 624N0 is communicated with display drive source 622, control circuit 621 allow signal select and output circuit 624 to the display screen tft array electrode 611 that is connected and 612 and public electrode 613 conveying display drive signals, display screen 610 is in the display driver state.
Survey the period at touch-control, control circuit 621 allows analog switch group 626, make operational amplifier 6241,6242 as the afterbody driver element ..., 624N power end 62410,62420 ..., 624N0 is communicated with touch-control driving source 623, signal is selected and output circuit 624 is carried touching signals simultaneously to display screen line electrode 611 and row electrode 612 each electrode wires and public electrode 613.Touch-control detection circuit 625 is by the mode of sampling simultaneously or the mode of scanning sample, detect respectively each operational amplifier 6241,6242 ..., the set sampled point 6251,6252 of 624N output terminal ..., the last touching signals of 625N variation, judge whether display screen 610 is touched, the position of which row-column electrode line is touched, display screen 610 is in the touch-control acquisition mode.By the point of crossing that the quilt that detects touches row electrode lines and touched the row electrode wires, determine by contact position.
Allow touch control type flat-panel display 600 intersegmental conversion when display driver period and touch-control are surveyed repeatedly, display driver and touch-control are surveyed time division multiplex display screen electrode, not only can show but also the touch control type flat-panel display of touch-control but form.
Judge the condition of the polar curve that gets an electric shock, can detect the touching signals of flowing through change maximum, and the electrode wires that surpasses certain setting threshold be the polar curve that gets an electric shock; Can be not yet with detect the touching signals of flowing through change maximum, and the electrode wires that surpasses certain setting threshold be the polar curve that gets an electric shock, and only with detect the touching signals of flowing through change surpass certain setting threshold electrode wires for geting an electric shock polar curve, allow touch control type flat-panel display allow the while multi-point touch.
Embodiment seven
Touch control type flat-panel display 700 as shown in Figure 7 comprises passive display screen 710, driving circuit 720.Driving circuit 720 comprises control circuit 721, the display drive source 722 of display driver energy is provided, provide the touch-control excitation energy touch-control driving source 723, signal selects and output circuit 724, touch-control detection circuit 725, analog switch group 726 etc.Display screen 710 has display screen line electrode 711 and row electrode 712 etc.Operational amplifier 7241 as signal selection and output circuit 724 afterbody driver elements, 7242,724N, the afterbody driver element of driving circuit 720 just, its input end connects front stage circuits 7240, its output terminal connects each electrode wires of display screen line electrode 711 and row electrode 712, its power end 72410,72420,724N0 connects each output terminal of simulation switches set 726, input end of analog switch group 726 each switch connects display drive source 722, and another input end of analog switch group 726 each switch is respectively through the touching signals sampling element 7251 of touch-control detection circuit 725,725N connects touch-control driving source 723.Touching signals sampling element 7251 ..., the 725N end that connects simulation switches set 726 is provided with sampled point, connects touch-control detection circuit 725.Touch-control detection circuit 725 detects the variation of current potential on the sampled point, the reference end points of potential measurement, can be located at another end points (being the output terminal of touch-control driving source 723) of touching signals sampling element 7251, also can be located at the common of driving circuit 720, also can be located at a certain specific reference point of driving circuit 720.Control circuit 721 allows analog switch group 726, make operational amplifier 7241,7242 as the afterbody driver element ..., 724N power end 72410,72420 ..., 724N0, or be communicated with display drive source 722, carry display drive signals to the display screen line electrode 711 that is connected and row electrode 712 each electrode wires; Or be communicated with touch-control driving source 723, carry touching signals to the display screen line electrode 711 that is connected and row electrode 712 each electrode wires.Each bar connecting line among Fig. 7 has more than and represents single line to connect, and also represents multi-thread annexation.
Above-mentioned touch control type flat-panel display is worked as follows:
In the display driver period, analog switch group 726 in the driving circuit 720, make operational amplifier 7241,7242 as the afterbody driver element ..., 724N power end 72410,72420 ..., 724N0 is communicated with display drive source 722, control circuit 721 allows signal select to carry display drive signals with output circuit 724 to display screen line electrode 711 that is connected and row electrode 712, and display screen 710 is in the display driver state.
Survey the period at touch-control, control circuit 721 allows analog switch group 726, make operational amplifier 7241,7242 as the afterbody driver element ..., 724N power end 72410,72420 ..., 724N0 respectively by touching signals sampling element 7251,7252 ..., 725N is communicated with touch-control driving source 723; Signal is selected and output circuit 724 is carried touching signals simultaneously to each electrode wires of display screen line electrode 711 and row electrode 712.Touch-control detection circuit 725 is by the mode of sampling simultaneously or the mode of scanning sample, detect respectively touching signals sampling element 7251,7252 ..., the last touching signals of 725N variation, judge whether display screen 710 is touched, the position of which row-column electrode line is touched, display screen 710 is in the touch-control acquisition mode.By the point of crossing that the quilt that detects touches row electrode lines and touched the row electrode wires, determine by contact position.
Allow touch control type flat-panel display 700 intersegmental conversion when display driver period and touch-control are surveyed repeatedly, display driver and touch-control are surveyed time division multiplex display screen electrode, not only can show but also the touch control type flat-panel display of touch-control but form.
Judge the condition of the polar curve that gets an electric shock, can detect the touching signals of flowing through change maximum, and the electrode wires that surpasses certain setting threshold be the polar curve that gets an electric shock; Can be not yet with detect the touching signals of flowing through change maximum, and the electrode wires that surpasses certain setting threshold be the polar curve that gets an electric shock, and only with detect the touching signals of flowing through change surpass certain setting threshold electrode wires for geting an electric shock polar curve, allow touch control type flat-panel display allow the while multi-point touch.
Embodiment eight
Touch control type flat-panel display 800 as shown in Figure 8 comprises passive display screen 810, driving circuit 820.Driving circuit 820 comprises control circuit 821, the display drive source 822 of display driver energy is provided, provide the touch-control excitation energy touch-control driving source 823, signal selects and output circuit 824, touch-control detection circuit 825, analog switch 826 etc.Display screen 810 has display screen line electrode 811 and row electrode 812 etc.As signal select and the operational amplifier 8241,8242 of output circuit 824 afterbody driver elements ..., 824N, the afterbody driver element of driving circuit 820 just, its input end connects front stage circuits 8240, and its output terminal connects each electrode wires of display screen line electrode 811 and row electrode 812; Its power end 82410,82420 ..., 824N0 connects each output terminal of analog switch 826, an input end of analog switch 826 each switch connects display drive source 822, another input end of analog switch 826 each switch connects touch-control driving source 823.Signal select and the operational amplifier 8241,8242 of output circuit 824 afterbody driver elements ..., 824N output terminal separately be provided with touch-control detection circuit 825 sampled point 8251,8252 ..., 825N.Touch-control detection circuit 825 detects the variation of current potential on the sampled point, the reference end points of potential measurement, can be located at the output terminal of touch-control driving source 823, also can be located at the common of driving circuit 820, also can be located at a certain specific reference point of driving circuit 820.Control circuit 821 allows analog switch 826, make operational amplifier 8241,8242 as the afterbody driver element ..., 824N power end 82410,82420 ..., 824N0, or be communicated with display drive source 822, carry display drive signals to the display screen line electrode 811 that is connected and row electrode 812 each electrode wires; Or be communicated with touch-control driving source 823, carry touching signals to the display screen line electrode 811 that is connected and row electrode 812 each electrode wires.Each bar connecting line among Fig. 8 has more than and represents single line to connect, and also represents multi-thread annexation.
Above-mentioned touch control type flat-panel display is worked as follows:
In the display driver period, analog switch 826 in the driving circuit 820, make operational amplifier 8241,8242 as the afterbody driver element ..., 824N power end 82410,82420 ..., 824N0 all is communicated with display drive source 822, control circuit 821 allows signal select to carry display drive signals with output circuit 824 to display screen line electrode 811 that is connected and row electrode 812, and display screen 810 is in the display driver state.
Survey the period at touch-control, control circuit 821 allows analog switch 826, make operational amplifier 8241,8242 as the afterbody driver element ..., 824N power end 82410,82420 ..., 824N0 is communicated with touch-control driving source 823 respectively; Signal is selected and output circuit 824 is carried touching signals simultaneously to each electrode wires of display screen line electrode 811 and row electrode 812.Touch-control detection circuit 825 is by the mode of sampling simultaneously or the mode of scanning sample, detect respectively each operational amplifier 8241,8242 ..., the set sampled point 8251,8252 of 824N output terminal ..., the last touching signals of 825N variation, judge whether display screen 810 is touched, the position of which row-column electrode line is touched, display screen 810 is in the touch-control acquisition mode.By the point of crossing that the quilt that detects touches row electrode lines and touched the row electrode wires, determine by contact position.
Allow touch control type flat-panel display 800 intersegmental conversion when display driver period and touch-control are surveyed repeatedly, display driver and touch-control are surveyed time division multiplex display screen electrode, not only can show but also the touch control type flat-panel display of touch-control but form.
Judge the condition of the polar curve that gets an electric shock, can detect the touching signals of flowing through change maximum, and the electrode wires that surpasses certain setting threshold be the polar curve that gets an electric shock; Can be not yet with detect the touching signals of flowing through change maximum, and the electrode wires that surpasses certain setting threshold be the polar curve that gets an electric shock, and only with detect the touching signals of flowing through change surpass certain setting threshold electrode wires for geting an electric shock polar curve, allow touch control type flat-panel display allow the while multi-point touch.
Embodiment nine
Touch control type flat-panel display 900 as shown in Figure 9 comprises the active display screen 910 of thin film transistor (TFT) (TFT), driving circuit 920.Driving circuit 920 comprises control circuit 921, the display drive source 922 of display driver energy is provided, provide the touch-control excitation energy touch-control driving source 923, signal selects and output circuit 924, touch-control detection circuit 925, analog switch group 926, analog switch group 9271,9272,9273 and 9274 etc.Display screen 910 has tft array column electrode 911, row electrode 912 and public electrode 913 etc.Operational amplifier 9241 as signal selection and output circuit 924 afterbody driver elements, 924N, the afterbody driver element of driving circuit 920 just, its input end connects front stage circuits 9240, its output terminal connects each electrode wires and the public electrode 913 of display screen tft array column electrode 911 and row electrode 912, its power end 92410,924N0 connects each output terminal of simulation switches set 926, an input end of analog switch group 926 each switch connects display drive source 922, and another input end of analog switch group 926 each switch divides four groups to connect simulation switches set 9271 respectively, 9272, each output terminal of 9273 and 9274 each switch; An input end of analog switch group 9271,9272,9273 and 9274 each switch is connected touch-control driving source 923 through the touching signals sampling element 9251,9252,9253 of touch-control detection circuit 925 with 9254 respectively, and another input end of analog switch group 9271,9272,9273 and 9274 each switch directly is connected touch-control driving source 923.Be connected an end of simulation switches set 9271,9272,9273 and 9274 with 9254 at touching signals sampling element 9251,9252,9253, sampled point 92510,92520,92530 be set be connected touch-control detection circuit 925 with 92540.Touch-control detection circuit 925 detects the variation of current potential on the sampled point 92510,92520,92530 and 92540, the reference end points of potential measurement, can be located at another end points (being the output terminal of touch-control driving source 923) of touching signals sampling element 9251,9252,9253 and 9254, also can be located at the common of driving circuit 920; Also can be located at a certain specific reference point of driving circuit 920.Control circuit 921 allows analog switch group 926 and analog switch group 9271,9272,9273,9274, make operational amplifier 9241 as the afterbody driver element ..., 924N power end 92410 ..., 924N0, or be communicated with display drive source 922, carry display drive signals to each electrode wires and the public electrode 913 of display screen line electrode 911 that is connected and row electrode 912; Or be communicated with touch-control driving source 923, carry touching signals to each electrode wires and the public electrode 913 of display screen line electrode 911 that is connected and row electrode 912.Each bar connecting line among Fig. 9 has more than and represents single line to connect, and also represents multi-thread annexation.
Above-mentioned touch control type flat-panel display is worked as follows:
In the display driver period, analog switch group 926 in the driving circuit 920, make operational amplifier 9241,9242 as the afterbody driver element ..., 924N power end 92410,92420 ..., 924N0 is communicated with display drive source 922, control circuit 921 allows signal select to carry display drive signals with output circuit 924 to each electrode wires and the public electrode 913 of display screen line electrode 911 that is connected and row electrode 912, and display screen 910 is in the display driver state.
Survey the period at touch-control, control circuit 921 allows analog switch group 926, make operational amplifier 9241 as the afterbody driver element ..., 924N power end 92410 ..., 924N0 divide four groups connect respectively the simulation switches set 9271,9272,9273 and 9274,9271,9272,9273 and 9274 part (one or more) power ends that all at every turn only allow in every group are communicated with touch-control driving source 923 by touching signals sampling element 9251,9252,9253 and 9254 respectively; The power end of remaining afterbody driver element directly is communicated with touch-control driving source 923; Signal is selected and output circuit 924 is carried touching signals simultaneously to each electrode wires and the public electrode 913 of display screen line electrode 911 and row electrode 912.Touch-control detection circuit 925 is by detecting the variation of touching signals on sampled point 92510,92520,92530 and 92540 one by one respectively, simultaneously touch-control being carried out in a plurality of zones of display screen 910 surveys, judge whether display screen 910 is touched, which zone is touched, the position of which row-column electrode line is touched, and display screen 910 is in the touch-control acquisition mode.By the point of crossing that the quilt that detects touches row electrode lines and touched the row electrode wires, determine by contact position.
Allow touch control type flat-panel display 900 intersegmental conversion when display driver period and touch-control are surveyed repeatedly, display driver and touch-control are surveyed time division multiplex display screen electrode, not only can show but also the touch control type flat-panel display of touch-control but form.
Touch-control is carried out in a plurality of zones of display screen simultaneously survey, can save the full frame touch-control that carries out of display screen is surveyed required time.
Embodiment ten
Touch control type flat-panel display 1000 as shown in figure 10 comprises the active display screen 1010 of thin film transistor (TFT) (TFT), driving circuit 1020.Driving circuit 1020 comprises control circuit 1021, the display drive source 1022 of display driver energy is provided, provide the touch-control excitation energy touch-control driving source 1023, signal selects and output circuit 1024, touch-control detection circuit 1025, analog switch group 1026, analog switch group 10271,10272,10273 and 10274 etc.Display screen 1010 has tft array column electrode 1011, row electrode 1012 and public electrode 1013 etc.As signal select and the operational amplifier 10241 of output circuit 1024 afterbody driver elements ..., 1024N, the afterbody driver element of driving circuit 1020 just, its input end connects front stage circuits 10240, and its output terminal connects each electrode wires and the public electrode 1013 of display screen tft array column electrode 1011 and row electrode 1012; Its power end 102410 ..., 1024N0 connects the output terminal of simulation switches set 1026 each switch, an input end of analog switch group 1026 each switch connects display drive source 1022, and another input end of analog switch group 1026 each switch connects touch-control driving source 1023.Signal select and the operational amplifier 10241 of output circuit 1024 afterbody driver elements ..., 1024N output terminal separately be provided with touch-control detection circuit 1025 sampled point 10251 ..., 1025N, sampled point 10251 ..., 1025N divides four groups respectively by analog switch group 10271,10272,10273 and 10274, connects touch-control detection circuit 1025.Touch-control detection circuit 1025 detects the variation of current potential on the sampled point, the reference end points of potential measurement, can be located at the output terminal of touch-control driving source 1023, also can be located at the common of driving circuit 1020, also can be located at a certain specific reference point of driving circuit 1020.Control circuit 1021 allow analog switch 1026 make operational amplifier 10241 as the afterbody driver element ..., 1024N power end 102410 ..., 1024N0, or be communicated with display drive source 1022, carry display drive signals to each electrode wires and the public electrode 1013 of display screen line electrode 1011 that is connected and row electrode 1012; Or be communicated with touch-control driving source 1023, carry touching signals to each electrode wires and the public electrode 1013 of display screen line electrode 1011 that is connected and row electrode 1012.Each bar connecting line among Figure 10 has more than and represents single line to connect, and also represents multi-thread annexation.
Above-mentioned touch control type flat-panel display is worked as follows:
In the display driver period, analog switch 1026 in the driving circuit 1020, make operational amplifier 10241 as the afterbody driver element ..., 1024N power end 102410 ..., 1024N0 is communicated with display drive source 1022, control circuit 1021 allows signal select to carry display drive signals with output circuit 1024 to each electrode wires and the public electrode 1013 of display screen line electrode 1011 that is connected and row electrode 1012, and display screen 1010 is in the display driver state.
Survey the period at touch-control, control circuit 1021 allows analog switch 1026, make operational amplifier 10241 as the afterbody driver element ..., 1024N power end 102410 ..., 1024N0 is communicated with touch-control driving source 1023, signal is selected and output circuit 1024 is carried touching signals simultaneously to each electrode wires and the public electrode 1013 of display screen line electrode 1011 and row electrode 1012.10271,10272,10273 and 10274 all only allow part (one or more) sampled point in every group of sampled point be communicated with touch-control detection circuit 1025 at every turn, touch-control detection circuit 1025 is by detecting the variation of touching signals on four groups of sampled points one by one respectively, simultaneously touch-control being carried out in a plurality of zones of display screen 1010 surveys, judge whether display screen 1010 is touched, which zone is touched, the position of which row-column electrode line is touched, and display screen 1010 is in the touch-control acquisition mode.By the point of crossing that the quilt that detects touches row electrode lines and touched the row electrode wires, determine by contact position.
Allow touch control type flat-panel display 1000 intersegmental conversion when display driver period and touch-control are surveyed repeatedly, display driver and touch-control are surveyed time division multiplex display screen electrode, not only can show but also the touch control type flat-panel display of touch-control but form.
Touch-control is carried out in a plurality of zones of display screen simultaneously survey, can save the full frame touch-control that carries out of display screen is surveyed required time.
Embodiment 11
Touch control type flat-panel display 1100 as shown in figure 11 comprises passive display screen 1110, driving circuit 1120.Driving circuit 1120 comprises control circuit 1121, the display drive source 1122 of display driver energy is provided, provides the touch-control driving source 1123 of touch-control excitation energy, signal to select and output circuit 1124, touch-control detection circuit 1125, signal loading circuit bank 1126 and analog switch group 1127 etc.Display screen 1110 has display screen line electrode 1111 and row electrode 1112 etc.Display drive source 1122 is used direct supply, and touch-control driving source 1123 uses the AC power of upper frequency (as greater than 50kHz).As signal select and the operational amplifier 11241,11242 of output circuit 1124 afterbody driver elements ..., 1124N, the afterbody driver element of driving circuit 1120 just, its input end connects front stage circuits 11240, and its output terminal connects each electrode wires of display screen line electrode 1111 and row electrode 1112; Its power end 112410,112420 ..., 1124N0 connect signal loading circuit bank 1126 each signal loading circuit unit 11261 ..., 1126N output terminal, an input end of each signal loading circuit unit connects display drive source 1122, and another input end connects the output terminal of simulation switches set 1127 each analog switch respectively; An input end of analog switch group 1127 each switch connects touch-control driving source 1123 through the touching signals sampling resistor 11251 of touch-control detection circuit 1125, and another input end connects touch-control driving source 1123 through balance resistance 11252.An end that connects simulation switches set 1127 at touching signals sampling element 11251 is provided with sampled point, connects touch-control detection circuit 1125.Touch-control detection circuit 1125 detects the variation of current potential on the sampled point, the reference end points of potential measurement, can be located at another end points (being the output terminal of touch-control driving source 1123) of touching signals sampling element 11251, also can be located at the common of driving circuit 1120, also can be located at a certain specific reference point of driving circuit 1120.Signal loading circuit bank 1126 and analog switch group 1127, make display drive source 1122 with exchange operational amplifier 11241,11242 that touch-control driving source 1123 mixed signals are applied to the afterbody driver element ..., 1124N power end 112410,112420 ..., on the 1124N0, operational amplifier 11241,11242 ..., 1124N carries display driver and touch-control mixed signals to the display screen line electrode 1111 that is connected and row electrode 1112 each electrode wires.Each bar connecting line among Figure 11 has more than and represents single line to connect, and also represents multi-thread annexation.
Above-mentioned touch control type flat-panel display, can survey the mode of carrying out simultaneously with display driver and touch-control and work:
Control circuit 1121 is only selected a switch in analog switch group 1127 each analog switch at every turn, by the touch-control driving source 1123 of touching signals sampling resistor 11251 connection high frequencies, rest switch also is communicated with the touch-control driving source 1123 of high frequency by balance resistance 11252.Signal loading circuit bank 1126 each signal loading circuit unit, allow display drive source 1122 and touch-control driving source 1123 be applied to simultaneously on the power end of each operational amplifier of driving circuit afterbody, the mixed signal that each operational amplifier is just carried low frequency display drive signals and high frequency touching signals to display screen line electrode 1111 and row electrode 1112 each electrode wires simultaneously.Control circuit 1121 allows analog switch group 1127 each switch be communicated with touch-control driving source 1123 by touching signals sampling resistor 11251 one by one, display screen line electrode 1111 and row electrode 1112 each electrode wires had both been transmitted touching signals simultaneously, and touch-control detection circuit 1125 only detects the variation of the touching signals of high frequency on the strip electrode line in display screen line electrode 1111 and the row electrode 1112 again at every turn.Touch-control detection circuit 1125 is by detecting the variation of the touching signals of high frequency on the touching signals sampling element 11251 one by one, judges whether display screen 1110 is touched, the position of which electrode wires is touched.By the point of crossing that the quilt that detects touches row electrode lines and touched the row electrode wires, determine by contact position.Display driver and touch-control are surveyed frequency division multiplexing display screen electrode, not only can show but also the touch control type flat-panel display of touch-control but form.
Above-mentioned touch control type flat-panel display, also can display driver and touch-control survey the mode that timesharing carries out and work:
In the display driver period, analog switch group 1127 each switch in the driving circuit 1120 and touch-control driving source 1123 disconnect, signal loading circuit bank 1126 each signal loading circuit unit only are applied to display drive source 1122 on the power end of each operational amplifier of driving circuit afterbody, the not synthetic any touching signals of each operational amplifier is on display drive signals, only to the display drive signals of display screen line electrode 1111 and row electrode 1112 each electrode wires conveying low frequency, display screen 1110 is in the display driver state.
Survey the period at touch-control, control circuit 1121 is only selected a switch in analog switch group 1127 each analog switch at every turn, by the touch-control driving source 1123 of touching signals sampling resistor 11251 connection high frequencies, rest switch also is communicated with the touch-control driving source 1123 of high frequency by balance resistance 11252.Signal loading circuit bank 1126 each signal loading circuit unit allow display drive source 1122 and touch-control driving source 1123 be applied to simultaneously on the power end of each operational amplifier of driving circuit afterbody.Control circuit 1121 allow again the display driver state of each operational amplifier of afterbody for output black or white display drive signals, each operational amplifier is just carried black or white display drive signals of low frequencies and high frequency touching signals to display screen line electrode 1111 and row electrode 1112 each electrode wires simultaneously.Control circuit 1121 allows analog switch group 1127 each switch be communicated with touch-control driving source 1123 by touching signals sampling resistor 11251 one by one, display screen line electrode 1111 and row electrode 1112 each electrode wires had both been transmitted touching signals simultaneously, and touch-control detection circuit 1125 only detects the variation of the touching signals of high frequency on that strip electrode line that is communicated with touching signals sampling resistor 11251 in display screen line electrode 1111 and the row electrode 1112 again at every turn.Touch-control detection circuit 1125 is by detecting the variation of the touching signals of high frequency on the touching signals sampling element 11251 one by one, judges whether display screen 1110 is touched, the position of which electrode wires is touched, and display screen 1110 is in the touch-control acquisition mode.By the point of crossing that the quilt that detects touches row electrode lines and touched the row electrode wires, determine by contact position.
Allow touch control type flat-panel display 1100 intersegmental conversion when display driver period and touch-control are surveyed repeatedly, display driver and touch-control are surveyed time division multiplex display screen electrode, not only can show but also the touch control type flat-panel display of touch-control but form.
Embodiment 12
Touch control type flat-panel display 1200 as shown in figure 12 comprises passive display screen 1210, driving circuit 1220.Driving circuit 1220 comprises control circuit 1221, the display drive source 1222 of display driver energy is provided, provides the touch-control driving source 1223 of touch-control excitation energy, signal to select and output circuit 1224, touch-control detection circuit 1225, signal loading circuit 1226 and analog switch 1227 etc.Display screen 1210 has display screen line electrode 1211 and row electrode 1212 etc.Display drive source 1222 is used direct supply, and touch-control driving source 1223 uses the AC power of upper frequency (as greater than 50kHz).As signal select and the operational amplifier 12241,12242 of output circuit 1224 afterbody driver elements ..., 1224N, the afterbody driver element of driving circuit 1220 just, its input end connects front stage circuits 12240, and its output terminal connects each electrode wires of display screen line electrode 1211 and row electrode 1212; Its power end 122410,122420 ..., 1224N0 connects the output terminal of signal loading circuit 1226, an input end of each signal loading circuit unit connects display drive source 1222, another input end connects touch-control driving source 1223.Signal select and the operational amplifier 12241,12242 of output circuit 1224 afterbody driver elements ..., 1224N output terminal separately be provided with touch-control detection circuit 1225 sampled point 12251,12252 ..., 1225N, connect touch-control detection circuit 1225.Touch-control detection circuit 1225 detects the variation of current potential on the sampled point, the reference end points of potential measurement, can be located at the output terminal of touch-control driving source 1223, also can be located at the common of driving circuit 1220, also can be located at a certain specific reference point of driving circuit 1220.Signal loading circuit bank 1226 make display drive source 1222 with exchange operational amplifier 12241,12242 that touch-control driving source 1223 mixed signals are applied to the afterbody driver element ..., 1224N power end 122410,122420 ..., on the 1224N0, operational amplifier 12241,12242 ..., 1224N carries display driver and touch-control mixed signals to the display screen line electrode 1211 that is connected and row electrode 1212 each electrode wires.Each bar connecting line among Figure 12 has more than and represents single line to connect, and also represents multi-thread annexation.
Above-mentioned touch control type flat-panel display, can survey the mode of carrying out simultaneously with display driver and touch-control and work:
Control circuit 1221 allows analog switch 1227 be in closed attitude, signal loading circuit 1226 is communicated with touch-control driving source 1223, signal loading circuit 1226 allows display drive source 1222 and touch-control driving source 1223 be applied to simultaneously on the power end of each operational amplifier of driving circuit afterbody, the mixed signal that each operational amplifier is just carried low frequency display drive signals and high frequency touching signals to display screen line electrode 1211 and row electrode 1212 each electrode wires simultaneously.Touch-control detection circuit 1225 is by the mode of sampling simultaneously or the mode of scanning sample, detect respectively each operational amplifier 12241,12242 ..., the set sampled point 12251,12252 of 1224N output terminal ..., the last touching signals of 1225N variation, judge whether display screen 1210 is touched, the position of which electrode wires is touched.By the point of crossing that the quilt that detects touches row electrode lines and touched the row electrode wires, determine by contact position.Display driver and touch-control are surveyed frequency division multiplexing display screen electrode, not only can show but also the touch control type flat-panel display of touch-control but form.
Above-mentioned touch control type flat-panel display, also can display driver and touch-control survey the mode that timesharing carries out and work:
In the display driver period, analog switch 1227 each switch in the driving circuit 1220 and touch-control driving source 1223 disconnect, 1226 in signal loading circuit is applied to display drive source 1222 on the power end of each operational amplifier of driving circuit afterbody, the not synthetic any touching signals of each operational amplifier is on display drive signals, only to the display drive signals of display screen line electrode 1211 and row electrode 1212 each electrode wires conveying low frequency, display screen 1210 is in the display driver state.
Survey the period at touch-control, analog switch 1227 is in closed attitude, and signal loading circuit 1226 allows display drive source 1222 and touch-control driving source 1223 be applied to simultaneously on the power end of each operational amplifier of driving circuit afterbody.Control circuit 1221 allow again the display driver state of each operational amplifier of afterbody for output black or white display drive signals, the mixed signal that each operational amplifier is just carried black or white display drive signals of low frequencies and high frequency touching signals to display screen line electrode 1211 and row electrode 1212 each electrode wires simultaneously.Touch-control detection circuit 1225 is by the mode of sampling simultaneously or the mode of scanning sample, detect respectively each operational amplifier 12241,12242 ..., the set sampled point 12251,12252 of 1224N output terminal ..., the last mixed signal medium-high frequency of 1225N touching signals variation, judge whether display screen 1210 is touched, the position of which electrode wires is touched, display screen 1210 is in the touch-control acquisition mode.By the point of crossing that the quilt that detects touches row electrode lines and touched the row electrode wires, determine by contact position.
Allow touch control type flat-panel display 1200 intersegmental conversion when display driver period and touch-control are surveyed repeatedly, display driver and touch-control are surveyed time division multiplex display screen electrode, not only can show but also the touch control type flat-panel display of touch-control but form.
Embodiment 13
Touch control type flat-panel display 1300 as shown in figure 13 comprises the active display screen 1310 of thin film transistor (TFT) (TFT), driving circuit 1320.Driving circuit 1320 comprises control circuit 1321, the display driver energy is provided and provide the touch-control excitation energy share drive source 1322, signal selects and output circuit 1323, touch-control detection circuit 1324, analog switch group 1325 etc.As signal select and the operational amplifier 13231,13232 of output circuit 1323 afterbody driver elements ..., 1323N, the afterbody driver element of driving circuit 1320 just, its input end connects front stage circuits 13230, and its output terminal connects each electrode wires and the public electrode 1313 of display screen tft array column electrode 1311 and row electrode 1312; Its power end 132310,132320 ..., 1323N0 connects each output terminal of simulation switches set 1325, an input end of analog switch group 1325 each switch share drive source 1322 through touching signals sampling element 13241 connections of touch-control detection circuit 1324, and another input end directly connection share drive source 1322.An end that connects simulation switches set 1325 at touching signals sampling element 13241 is provided with sampled point, connects touch-control detection circuit 1324.Touch-control detection circuit 1324 detects the variation of current potential on the sampled point, the reference end points of potential measurement, can be located at another end points (being the output terminal of touch-control driving source 1322) of touching signals sampling element 13241, also can be located at the common of driving circuit 1320, also can be located at a certain specific reference point of driving circuit 1320.The drive source 1322 that share of display driver and touch-control excitation uses direct supply.Control circuit 1321 control afterbody operational amplifiers 13231,13232 ..., 1323N front stage circuits, to afterbody operational amplifier 13231,13232 ..., when the input end input direct current of 1323N or low frequency signal, the output terminal of afterbody operational amplifier is also followed its input end, to each electrode wires of display screen line electrode 1311 that is connected and row electrode 1312 and the display drive signals of public electrode 1313 output direct currents or low frequency; The front stage circuits of control circuit 1321 control afterbody operational amplifiers, when the input end of afterbody operational amplifier is imported upper frequency (as greater than 50kHz) signal, the output terminal of afterbody operational amplifier is also followed its input end, to each electrode wires of display screen line electrode 1311 that is connected and row electrode 1312 and the touching signals of public electrode 1313 output upper frequencies.It all is to come to share drive source 1322 that driving circuit 1320 provides display driver energy and touch-control excitation energy to display screen 1310.Each bar connecting line among Figure 13 has more than and represents single line to connect, and also represents multi-thread annexation.
Above-mentioned touch control type flat-panel display is worked as follows:
In the display driver period, control circuit 1321 allows and connects afterbody operational amplifier 13231,13232,1323N power end 132310,132320, the analog switch group 1325 of 1323N0, switch to and allow direct connection of operational amplifier power end share drive source 1322, control circuit 1321 control front stage circuits are to afterbody operational amplifier 13281,13232, when the input end input direct current of 1323N or low frequency signal, the output terminal of afterbody operational amplifier is also followed its input end, to each electrode wires of display screen line electrode 1311 that is connected and row electrode 1312 and the display drive signals of public electrode 1313 output direct currents or low frequency.In this period, driving circuit 1320 is worked in the mode of common display driver fully, signal is selected to carry display drive signals with output circuit 1323 to each electrode wires and the public electrode 1313 of display screen line electrode 1311 that is connected and row electrode 1312, and display screen 1310 is in the display driver state.
Survey the period at touch-control, control circuit 1321 control front stage circuits to afterbody operational amplifier 13231,13232 ..., 1323N input end input upper frequency (as greater than 50kHz) signal, the output terminal of afterbody operational amplifier is also followed its input end, to the touching signals of the display screen ranks electrode 1311 that is connected and row electrode 1312 each electrode wires and public electrode 1313 output upper frequencies.And control circuit 1321 is only selected a switch at every turn from analog switch group 1325 each analog switch, is communicated with by touching signals sampling resistor 13241 one by one and share drive source 1322, and rest switch directly connection share drive source 1322.Each electrode wires of display screen line electrode 1311 and row electrode 1312 and public electrode 1313 had both transmitted touching signals simultaneously, and touch-control detection circuit 1324 only detects the variation of touching signals on that strip electrode line that is communicated with touching signals sampling resistor 13241 in display screen line electrode 1311 and the row electrode 1312 again at every turn.In this period, driving circuit 1320 is to each electrode wires of display screen line electrode 1311 that is connected and row electrode 1312 and the touching signals of public electrode 1313 output upper frequencies, touch-control detection circuit 1324 is by detecting the variation of touching signals on the touching signals sampling element 13241 one by one, judge whether display screen 1310 is touched, the position of which row-column electrode line is touched, display screen 1310 is in the touch-control acquisition mode.By the point of crossing that the quilt that detects touches row electrode lines and touched the row electrode wires, determine by contact position.
Allow touch control type flat-panel display 1300 intersegmental conversion when display driver period and touch-control are surveyed repeatedly, display driver and touch-control are surveyed time division multiplex display screen electrode, not only can show but also the touch control type flat-panel display of touch-control but form.
Judge the condition of the polar curve that gets an electric shock, can detect the touching signals of flowing through change maximum, and the electrode wires that surpasses certain setting threshold be the polar curve that gets an electric shock; Can be not yet with detect the touching signals of flowing through change maximum, and the electrode wires that surpasses certain setting threshold be the polar curve that gets an electric shock, and only with detect the touching signals of flowing through change surpass certain setting threshold electrode wires for geting an electric shock polar curve, allow touch control type flat-panel display allow the while multi-point touch.
Embodiment 14
Touch control type flat-panel display 1400 as shown in figure 14 comprises the active display screen 1410 of thin film transistor (TFT) (TFT), driving circuit 1420.Driving circuit 1420 comprises control circuit 1421, the display driver energy is provided and provide the touch-control excitation energy share drive source 1422, signal is selected and output circuit 1423, touch-control detection circuit 1424 etc.As signal select and the operational amplifier 14231,14232 of output circuit 1423 afterbody driver elements ..., 1423N, the afterbody driver element of driving circuit 1420 just, its input end connects front stage circuits 14230, its output terminal connects each electrode wires and the public electrode 1413 of display screen tft array column electrode 1411 and row electrode 1412, its power end 142310,142320 ..., 1423N0 through touching signals sampling unit 14241,14242 ..., 1424N connects and to share drive source 1422.Touching signals sampling unit 14241,14242 ..., 1424N all connects touch-control detection circuit 1424, touch-control detection circuit 1424 detects the variation of touching signals on the sampling units.The drive source 1422 that share of display driver and touch-control excitation uses direct supply.Control circuit 1421 control afterbody operational amplifiers 14231,14232 ..., 1423N front stage circuits, to afterbody operational amplifier 14231,14232 ..., when the input end input direct current of 1423N or low frequency signal, the output terminal of afterbody operational amplifier is also followed its input end, to each electrode wires of display screen line electrode 1411 that is connected and row electrode 1412 and the display drive signals of public electrode 1413 output direct currents or low frequency; The front stage circuits of control circuit 1421 control afterbody operational amplifiers, when the input end of afterbody operational amplifier is imported upper frequency (as greater than 50kHz) signal, the output terminal of afterbody operational amplifier is also followed its input end, to each electrode wires of display screen line electrode 1411 that is connected and row electrode 1412 and the touching signals of public electrode 1413 output upper frequencies.It all is to come to share drive source 1422 that driving circuit 1420 provides display driver energy and touch-control excitation energy to display screen 1410.Each bar connecting line among Figure 14 has more than and represents single line to connect, and also represents multi-thread annexation.
Above-mentioned touch control type flat-panel display is worked as follows:
In the display driver period, control circuit 1421 control front stage circuits to afterbody operational amplifier 14231,14232 ..., when the input end input direct current of 1423N or low frequency signal, the output terminal of afterbody operational amplifier is also followed its input end, to each electrode wires of display screen line electrode 1411 that is connected and row electrode 1412 and the display drive signals of public electrode 1413 output direct currents or low frequency.In this period, driving circuit 1420 is worked in the mode of common display driver fully, signal is selected to carry display drive signals with output circuit 1423 to each electrode wires and the public electrode 1413 of display screen line electrode 1411 that is connected and row electrode 1412, and display screen 1410 is in the display driver state.
Survey the period at touch-control, control circuit 1421 control front stage circuits to afterbody operational amplifier 14231,14232 ..., 1423N input end input upper frequency (as greater than 50kHz) signal, the output terminal of afterbody operational amplifier is also followed its input end, the touching signals of exporting upper frequency simultaneously to each electrode wires and the public electrode 1413 of display screen line electrode 1411 that is connected and row electrode 1412.Touch-control detection circuit 1424 is by the mode of sampling simultaneously or the mode of scanning sample, detect respectively each touching signals sampling unit 14241,14242 ..., the last touching signals of 1424N variation, judge whether display screen 1410 is touched, the position of which row-column electrode line is touched, display screen 1410 is in the touch-control acquisition mode.By the point of crossing that the quilt that detects touches row electrode lines and touched the row electrode wires, determine by contact position.
Allow touch control type flat-panel display 1400 intersegmental conversion when display driver period and touch-control are surveyed repeatedly, display driver and touch-control are surveyed time division multiplex display screen electrode, not only can show but also the touch control type flat-panel display of touch-control but form.
Judge the condition of the polar curve that gets an electric shock, can detect the touching signals of flowing through change maximum, and the electrode wires that surpasses certain setting threshold be the polar curve that gets an electric shock; Can be not yet with detect the touching signals of flowing through change maximum, and the electrode wires that surpasses certain setting threshold be the polar curve that gets an electric shock, and only with detect the touching signals of flowing through change surpass certain setting threshold electrode wires for geting an electric shock polar curve, allow touch control type flat-panel display allow the while multi-point touch.
The touching signals sampling unit can be the passive device of single resistance or electric capacity or inductance, also can be the combination of multiple passive device, also can be single active device, also can be the circuit unit with active device.
Embodiment 15
Touch control type flat-panel display 1500 as shown in figure 15 comprises the active display screen 1510 of thin film transistor (TFT) (TFT), driving circuit 1520.Driving circuit 1520 comprises control circuit 1521, the display driver energy is provided and provide the touch-control excitation energy share drive source 1522, signal is selected and output circuit 1523, touch-control detection circuit 1524 etc.As signal select and the operational amplifier 15231,15232 of output circuit 1523 afterbody driver elements ..., 1523N, the afterbody driver element of driving circuit 1520 just, its input end connects front stage circuits 15230, its output terminal connects each electrode wires and the public electrode 1513 of display screen tft array column electrode 1511 and row electrode 1512, its power end 152310,152320 ..., 1523N0 connects and to share drive source 1522.Signal select and the operational amplifier 15231,15232 of output circuit 1523 afterbody driver elements ..., 1523N output terminal separately be provided with touch-control detection circuit 1524 sampled point 15241,15242 ..., 1524N.Touch-control detection circuit 1524 detects the variation of current potential on the sampled point, the reference end points of potential measurement, can be located at the output terminal of touch-control driving source 1522, also can be located at the common of driving circuit 1520, also can be located at a certain specific reference point of driving circuit 1520.The drive source 1522 that share of display driver and touch-control excitation uses direct supply.Control circuit 1521 control afterbody operational amplifiers 15231,15232 ..., 1523N front stage circuits, to afterbody operational amplifier 15231,15232 ..., when the input end input direct current of 1523N or low frequency signal, the output terminal of afterbody operational amplifier is also followed its input end, to each electrode wires of display screen line electrode 1511 that is connected and row electrode 1512 and the display drive signals of public electrode 1513 output direct currents or low frequency; The front stage circuits of control circuit 1521 control afterbody operational amplifiers, when the input end of afterbody operational amplifier is imported upper frequency (as greater than 50kHz) signal, the output terminal of afterbody operational amplifier is also followed its input end, to each electrode wires of display screen line electrode 1511 that is connected and row electrode 1512 and the touching signals of public electrode 1513 output upper frequencies.It all is to come to share drive source 1522 that driving circuit 1520 provides display driver energy and touch-control excitation energy to display screen 1510.Each bar connecting line among Figure 15 has more than and represents single line to connect, and also represents multi-thread annexation.
Above-mentioned touch control type flat-panel display is worked as follows:
In the display driver period, control circuit 1521 control front stage circuits to afterbody operational amplifier 15231,15232 ..., when the input end input direct current of 1523N or low frequency signal, the output terminal of afterbody operational amplifier is also followed its input end, to each electrode wires of display screen line electrode 1511 that is connected and row electrode 1512 and the display drive signals of public electrode 1513 output direct currents or low frequency.In this period, driving circuit 1520 is worked in the mode of common display driver fully, signal is selected to carry display drive signals with output circuit 1523 to each electrode wires and the public electrode 1513 of display screen line electrode 1511 that is connected and row electrode 1512, and display screen 1510 is in the display driver state.
Survey the period at touch-control, control circuit 1521 control front stage circuits to afterbody operational amplifier 15231,15232 ..., 1523N input end input upper frequency (as greater than 50k Hz) signal, the output terminal of afterbody operational amplifier is also followed its input end, the touching signals of exporting upper frequency simultaneously to each electrode wires and the public electrode 1513 of display screen line electrode 1511 that is connected and row electrode 1512.Touch-control detection circuit 1524 is by the mode of sampling simultaneously or the mode of scanning sample, detect respectively each operational amplifier 15231,15232 ..., the set sampled point 15241,15242 of 1523N output terminal ..., the last touching signals of 1524N variation, judge whether display screen 1510 is touched, the position of which row-column electrode line is touched, display screen 1510 is in the touch-control acquisition mode.By the point of crossing that the quilt that detects touches row electrode lines and touched the row electrode wires, determine by contact position.
Allow touch control type flat-panel display 1500 intersegmental conversion when display driver period and touch-control are surveyed repeatedly, display driver and touch-control are surveyed time division multiplex display screen electrode, not only can show but also the touch control type flat-panel display of touch-control but form.
Judge the condition of the polar curve that gets an electric shock, can detect the touching signals of flowing through change maximum, and the electrode wires that surpasses certain setting threshold be the polar curve that gets an electric shock; Can be not yet with detect the touching signals of flowing through change maximum, and the electrode wires that surpasses certain setting threshold be the polar curve that gets an electric shock, and only with detect the touching signals of flowing through change surpass certain setting threshold electrode wires for geting an electric shock polar curve, allow touch control type flat-panel display allow the while multi-point touch.
Embodiment 16
Touch control type flat-panel display 1600 as shown in figure 16 comprises passive display screen 1610, driving circuit 1620.Driving circuit 1620 comprises control circuit 1621, the display drive source 1622 of display driver energy is provided, provide the touch-control excitation energy touch-control driving source 1623, signal selects and output circuit 1624, touch-control detection circuit 1625, analog switch group 1626 and 1627 etc.Display screen 1610 has display screen line electrode 1611 and row electrode 1612 etc.Display drive source 1622 is used direct supply, and touch-control driving source 1623 uses the AC power of upper frequency (as greater than 50kHz).Operational amplifier 16241 as signal selection and output circuit 1624 afterbody driver elements, 16242,1624N, the afterbody driver element of driving circuit 1620 just, its input end connects front stage circuits 16240, its output terminal connects each electrode wires of display screen line electrode 1611 and row electrode 1612, its power end 162410,162420,1624N0 connects each output terminal of simulation switches set 1626, an input end of analog switch group 1626 each switch connects display drive source 1622, and another input end of analog switch group 1626 each switch connects the output terminal of simulation switches set 1627; An input end of analog switch group 1627 each switch connects touch-control driving source 1623 through the touching signals sampling resistor 16251 of touch-control detection circuit 1625, and another input end connects touch-control driving source 1623 through balance resistance 16252.An end that connects simulation switches set 1627 at touching signals sampling element 16251 is provided with sampled point, connects touch-control detection circuit 1625.Touch-control detection circuit 1625 detects the variation of current potential on the sampled point, the reference end points of potential measurement, can be located at another end points (being the output terminal of touch-control driving source 1623) of touching signals sampling element 16251, also can be located at the common of driving circuit 1620, also can be located at a certain specific reference point of driving circuit 1620.Control circuit 1621 allows analog switch group 1626 and 1627, make operational amplifier 16241,16242 as the afterbody driver element ..., 1624N power end 162410,162420 ..., 1624N0, or be communicated with display drive source 1622, carry display drive signals to the display screen line electrode 1611 that is connected and row electrode 1612 each electrode wires; Or be communicated with touch-control driving source 1623, carry touching signals to the display screen line electrode 1611 that is connected and row electrode 1612 each electrode wires.Each bar connecting line among Figure 16 has more than and represents single line to connect, and also represents multi-thread annexation.
Above-mentioned touch control type flat-panel display is worked as follows:
In the display driver period, analog switch group 1626 in the driving circuit 1620, make operational amplifier 16241,16242 as the afterbody driver element ..., 1624N power end 162410,162420 ..., 1624N0 is communicated with display drive source 1622, control circuit 1621 allows signal select to carry display drive signals with output circuit 1624 to the display screen electrode 1611 that is connected and 1612, and display screen 1610 is in the display driver state.
Survey the period at touch-control, control circuit 1621 allows analog switch group 1626, make operational amplifier 16241,16242 as the afterbody driver element ..., 1624N power end 162410,162420 ..., 1624N0 is communicated with analog switch group 1627, again by analog switch group 1627, each power end that only allows an afterbody driver element, also can allow the power end of a plurality of afterbody driver elements at every turn, be communicated with touch-control driving source 1623 by touching signals sampling element 16251; The power end of remaining afterbody driver element is communicated with touch-control driving source 1623 by balance resistance 16252; Signal is selected and output circuit 1624 is carried touching signals simultaneously to display screen line electrode 1611 and row electrode 1612 each electrode wires.Touch-control detection circuit 1625 is by detecting the variation of touching signals on the touching signals sampling element 16251 one by one, judges whether display screen 1610 is touched, the position of which row-column electrode line is touched, and display screen 1610 is in the touch-control acquisition mode.By the point of crossing that the quilt that detects touches row electrode lines and touched the row electrode wires, determine by contact position.
Allow touch control type flat-panel display 1600 intersegmental conversion when display driver period and touch-control are surveyed repeatedly, display driver and touch-control are surveyed time division multiplex display screen electrode, not only can show but also the touch control type flat-panel display of touch-control but form.
Above content be in conjunction with concrete preferred implementation to further describing that the utility model is done, can not assert that concrete enforcement of the present utility model is confined to these explanations.For the utility model person of an ordinary skill in the technical field, under the prerequisite that does not break away from the utility model design, can also make some simple deduction or replace, all should be considered as belonging to protection domain of the present utility model.

Claims (17)

1. touch control type flat-panel display, form by display screen and driving circuit, comprise display driver circuit, control circuit, gating circuit or loaded circuit, touch-control driving source and touch-control detection circuit in the driving circuit again, display driver circuit comprises display drive source, signal selection and output circuit; Each output terminal of driving circuit connects each electrode wires of display screen respectively, it is characterized in that:
The touch-control driving source of touch-control excitation energy is provided, connects the power end of driving circuit afterbody driver element; The afterbody driver element has an active component at least, output terminal connects the display screen electrode wires; The touch-control detection circuit judges by the flow through variation of touching signals of afterbody driver element power end or output terminal of detection whether the display screen electrode wires that is connected with driver element is touched.
2. touch control type flat-panel display according to claim 1 is characterized in that:
The power end of driver element can be the positive power source terminal of driver element in the driving circuit that described touch-control driving source connects, and also can be the negative power end of driver element.
3. touch control type flat-panel display according to claim 1 is characterized in that:
The power end of afterbody driver element in the driving circuit that described each electrode wires of display screen is connected, be connected with the touch-control driving source that the touch-control excitation energy is provided with the display drive source that the display driver energy is provided by gating circuit respectively, gating circuit makes the power end of driver element, or be communicated with display drive source, driving circuit is to the display screen electrode wires transmitting and displaying drive signal that links to each other; Or be communicated with the touch-control driving source, driving circuit is to the display screen electrode wires transmission touching signals that links to each other.
4. touch control type flat-panel display according to claim 3 is characterized in that:
The touch-control detection circuit detects the check point of touching signals, is arranged between touch-control driving source and the gating circuit, or is arranged between gating circuit and the driver element power end, or be arranged between the multistage gating circuit, or be arranged on the output terminal of driver element.
5. touch control type flat-panel display according to claim 1 is characterized in that:
The power end of afterbody driver element in the driving circuit that described each electrode wires of display screen is connected, respectively by the signal loading circuit unit, be connected with the touch-control driving source that the touch-control excitation energy is provided with the display drive source that the display driver energy is provided, driving circuit to the subordinate's circuit that links to each other at last until display screen electrode wires transmitting and displaying drive signal and touching signals simultaneously.
6. touch control type flat-panel display according to claim 5 is characterized in that:
Described signal loading circuit is by gating circuit or directly is connected with the touch-control driving source.
7. touch control type flat-panel display according to claim 6 is characterized in that:
The touch-control detection circuit detects the check point of touching signals, be arranged between touch-control driving source and the gating circuit, or be arranged between gating circuit and the signal loading circuit, or be arranged between signal loading circuit and the driver element power end, or be arranged on the output terminal of driver element.
8. touch control type flat-panel display according to claim 1 is characterized in that:
The described touch-control driving source that the touch-control excitation energy is provided with provide the display drive source of display driver energy to share same power supply, the power end of driver element share the source with display driver and touch-control excitation and is connected in the driving circuit, driving circuit to the subordinate's circuit that links to each other at last until display screen electrode wires while or timesharing transmitting and displaying drive signal and touching signals.
9. touch control type flat-panel display according to claim 8 is characterized in that:
The power end of interior each driver element of the driving circuit that described each electrode wires of display screen is connected is by gating circuit or directly share the source with display driver and touch-control excitation is connected.
10. touch control type flat-panel display according to claim 9 is characterized in that:
The touch-control detection circuit detects the check point of touching signals, is arranged on the excitation of display driver and touch-control and share between source and the gating circuit, or be arranged between gating circuit and the driver element power end, or be arranged on the output terminal of driver element.
11. touch control type flat-panel display according to claim 1 is characterized in that:
It is independent current source that the source is share in described display driver and touch-control excitation, or the independent output terminal in the power output end.
12., it is characterized in that according to claim 3 or 6 or 9 described touch control type flat-panel displays:
Described gating circuit is single-stage or the multistage gating circuit that has an active component at least.
13. touch control type flat-panel display according to claim 1 is characterized in that:
Described touch-control driving source be direct supply, also can be alternating source, also can be the alternating current-direct current AC-battery power source.
14. touch control type flat-panel display according to claim 13 is characterized in that:
When described touch-control driving source is direct supply, the output terminal of afterbody driver element in the driving circuit, output follow the alternating signal of input end and the touching signals of alternation to the display screen electrode wires.
15. touch control type flat-panel display according to claim 13 is characterized in that:
When described touch-control driving source is alternating source, the output terminal of afterbody driver element in the driving circuit, output by the input end gating, from the alternation touching signals of power end to the display screen electrode wires.
16. touch control type flat-panel display according to claim 1 is characterized in that:
The touching signals sample circuit of described touch-control detection circuit is a passive element, or active component, or the circuit unit of a plurality of element composition.
17. touch control type flat-panel display according to claim 1 is characterized in that:
Described driving circuit afterbody driver element output terminal is not less than 50kHz to the frequency of the touching signals of display screen electrode wires output.
CN2009201552460U 2009-05-21 2009-05-21 Touch-control type flat-panel display Expired - Fee Related CN201749653U (en)

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Application Number Priority Date Filing Date Title
CN2009201552460U CN201749653U (en) 2009-05-21 2009-05-21 Touch-control type flat-panel display

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Application Number Priority Date Filing Date Title
CN2009201552460U CN201749653U (en) 2009-05-21 2009-05-21 Touch-control type flat-panel display

Publications (1)

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CN201749653U true CN201749653U (en) 2011-02-16

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