CN103488349B - Touch control induction panel and induction circuit therein - Google Patents
Touch control induction panel and induction circuit therein Download PDFInfo
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- CN103488349B CN103488349B CN201310339745.6A CN201310339745A CN103488349B CN 103488349 B CN103488349 B CN 103488349B CN 201310339745 A CN201310339745 A CN 201310339745A CN 103488349 B CN103488349 B CN 103488349B
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Abstract
An induction circuit comprises an energy storage unit, a light sensing unit and a charging unit. The light sensing unit is electrically coupled to the energy storage unit, and is used for sensing a first color light, presenting a corresponding conduction state according to the intensity of the first color light to control the discharge of the energy storage unit, and resetting the energy storage unit according to the conduction of the control signal. The charging unit is electrically coupled to the energy storage unit and charges the energy storage unit in the process of resetting the energy storage unit. A touch sensing panel is also disclosed.
Description
Technical field
Present invention relates to a kind of touch-control sensing panel, and in particular to the sensor circuit in a kind of touch-control sensing panel.
Background technology
Generally speaking, for Photoinduction type touch control display, it produces corresponding faradic current mainly by wherein optical inductor according to different illumination intensity, and experiences, as wherein optical inductor, the foundation that light is strong and weak using the difference in size between different faradic currents, and then makees the judgement of touch-control.For example, optical inductor is when finger touching, ambient light irradiation and light pen touch-control, different faradic currents can be produced the most accordingly, and when the light intensity that optical inductor accepts is bigger, faradic current increases the most therewith, and output voltage can be transferred to via integrator circuit between difference faradic current, whereby for determining whether touch control operation.
But, in touch-control display panel, what touch control induction circuit was received reset current potential can because the resistance capacitance in panel loads (RC loading) effect difference, thus make way for the end of signal transmission path reset current potential and the replacement current potential that had of current potential being positioned at signal transmission path front end is different, make when resetting current potential and putting on touch control induction circuit and the generation of follow-up output voltage, output voltage in signal transmission path front end can be more than the output voltage at signal transmission path end, and the situation causing touch control operation to judge by accident occurs.
Summary of the invention
Present invention is about a kind of touch-control sensing panel and sensor circuit therein, and the situation improving touch control operation erroneous judgement whereby occurs.
One enforcement aspect of present invention is about a kind of sensor circuit, and it comprises energy-storage units, light sensing unit and charhing unit.Light sensing unit is electrically coupled to energy-storage units, in order to sense one first color of light, and present the electric discharge with control energy-storage units of the corresponding conducting state according to the intensity of the first color of light sensed, and in order to energy-storage units is reset according to a control signal conducting.Charhing unit is electrically coupled to energy-storage units, and is charged energy-storage units during energy-storage units resets.
In an embodiment of the present invention, the voltage that charhing unit is stored by energy-storage units is controlled optionally to be charged energy-storage units.
In an alternative embodiment of the invention, energy-storage units further includes capacity cell, and charhing unit further includes at least one switch element, and switch element is in order to according to the voltage turn-on capacity cell stored by capacity cell and a supply voltage.
In a present invention time embodiment, charhing unit further includes at least one Photosensing Units, and it is in order to sense one second color of light, and the intensity generation of foundation the second color of light compensates electric current accordingly in light sensing unit produces leakage current according to the second color of light when.
Another enforcement aspect of present invention is about a kind of touch-control sensing panel, and it comprises each in multiple sensor circuit, and aforementioned sensor circuit and comprises capacity cell, optotransistor and charhing unit.Optotransistor electric property coupling capacity cell is in a running node, corresponding conducting state is presented in order to sense the intensity of one first color of light, capacity cell is discharged by optotransistor, wherein optotransistor is controlled by a control signal and is turned on so that capacity cell is reset by optotransistor.Charhing unit electric property coupling capacity cell is in running node, and turns on capacity cell and a supply voltage during capacity cell resets.
In an embodiment of the present invention, charhing unit further includes switch element, and it has a control end, one first end and one second end, and wherein control end and the second end electric property coupling capacity cell are in running node, and the first end supplies voltage in order to electric property coupling.
In an alternative embodiment of the invention, charhing unit further includes the first switch element and second switch element.First switch element has a control end, one first end and one second end, and wherein control end electric property coupling capacity cell is in running node, and the first end supplies voltage in order to electric property coupling.Second switch element has a control end, one first end and one second end, wherein controls end and the second end electric property coupling capacity cell in running node, the second end of first end electric property coupling the first switch element.
In a present invention time embodiment, charhing unit further includes the first switch element and second switch element.First switch element has a control end, one first end and one second end, and wherein control end electric property coupling capacity cell is in running node, and the first end supplies voltage in order to electric property coupling.Second switch element has a control end, one first end and one second end, wherein controls end and the second end of first end electric property coupling the first switch element, and the second end electric property coupling capacity cell is in running node.
In still another embodiment of the process, touch-control sensing panel further includes colored filter, colored filter comprises multiple color blocking, wherein color blocking further includes one first color blocking and one second color blocking of tool one second color of tool one first color, first color blocking corresponding optotransistor configuration, the second color blocking corresponding charhing unit configuration.
In yet another embodiment of the invention, touch-control sensing panel further includes colored filter, and colored filter comprises multiple color blocking, and wherein color blocking further includes one first color blocking and one second color blocking, first color blocking corresponding optotransistor configuration, the second color blocking corresponding charhing unit configuration.Charhing unit further includes at least one Photosensing Units, and its Photosensing Units is in order to produce and to compensate electric current accordingly through the second color blocking sensing one second color of light, to compensate optotransistor through the first color blocking according to leakage current produced by the second color of light.
From the above, apply aforementioned embodiments of the invention effectively to improve and cause sensing, because of resistance capacitance load (RC loading) effect, the situation that output signal is wrong, and then the situation preventing touch control operation from judging by accident occurs, and the problem that the light collocation that more can improve specific color blocking and different colours light pen operates and produces leakage current, it is to avoid affect the generation of normal touching signals.
Present invention aims to provide the simplification summary of this disclosure, so that reader possesses basic understanding to this disclosure.The complete overview of this summary of the invention not this disclosure, and it is not intended to pointing out important (or the crucial) element of the embodiment of the present invention or defining the scope of the present invention.
Accompanying drawing explanation
Fig. 1 is the schematic diagram illustrating a kind of touch-control sensing panel according to the embodiment of the present invention；
Fig. 2 is the circuit box schematic diagram illustrating sensor circuit in a kind of panel of touch-control sensing as shown in Figure 1 according to the embodiment of the present invention；
Fig. 3 is the circuit diagram illustrating a kind of sensor circuit as shown in Figure 2 according to first embodiment of the invention；
Fig. 4 is the circuit diagram illustrating a kind of sensor circuit as shown in Figure 2 according to second embodiment of the invention；
Fig. 5 is the circuit diagram illustrating a kind of sensor circuit as shown in Figure 2 according to third embodiment of the invention；
Fig. 6 is the Frequency spectrum ratio relatively schematic diagram illustrating a kind of LED light pen with color blocking；
Fig. 7 is the circuit diagram illustrating a kind of sensor circuit as shown in Figure 2 according to fourth embodiment of the invention；
Fig. 8 is the circuit diagram illustrating a kind of sensor circuit as shown in Figure 2 according to fifth embodiment of the invention；
Fig. 9 is the circuit diagram illustrating a kind of sensor circuit as shown in Figure 2 according to sixth embodiment of the invention；And
Figure 10 is the circuit diagram illustrating a kind of sensor circuit as shown in Figure 2 according to seventh embodiment of the invention.
Wherein, reference
100: touch-control sensing panel
110: gate drivers
120,120a～120g: sensor circuit
210,210a: energy-storage units
220,220a: light sensing unit
230,230a～230c: charhing unit
Detailed description of the invention
Hereafter appended accompanying drawing is coordinated to elaborate for embodiment, but the embodiment provided also is not used to limit the scope that the present invention is contained, and the description of structure operation is not used to limit its order performed, any structure reconfigured by element, produced the device with impartial effect, be all the scope that the present invention is contained.Additionally, accompanying drawing is for the purpose of description, and map not according to life size.For making to readily appreciate, in the description below, similar elements will illustrate with identical symbology.
In the word (terms) that full piece description and claim are used, in addition to having and indicating especially, be generally of each word use in this area, in the content that discloses at this with the usual meaning in special content.Some is in order to describe the word of this exposure by lower or discuss in the other places of this description, to provide those skilled in the art about guiding extra in the description of this exposure.
About " about " used herein, the error of " about " or " substantially " commonly exponential quantity or scope within 20 percent, it is preferably to be the most then within 5 percent within 10.Wen Zhongruo is without clearly stating, and its mentioned numerical value all regards as approximation, such as can error as represented by " about ", " about " or " substantially " or scope, or other approximations.
About " first " used herein, " second " ... etc., censuring order or the meaning of cis-position the most especially, be also not used to limit the present invention, it is only used to element or the operation that difference describes with constructed term.
Secondly, the word used in this article " comprises ", " including ", " having ", " containing " etc., be the term of opening, i.e. mean including but not limited to.
It addition, about " coupling " used herein or " connection ", all can refer to that entity or in electrical contact the most directly made by two or multiple elements, or mutually indirectly put into effect body or in electrical contact, be also referred to as two or multiple element mutual operation or actions.
Fig. 1 is the schematic diagram illustrating a kind of touch-control sensing panel according to the embodiment of the present invention.As shown in Figure 1, touch-control sensing panel 100 comprises gate drivers 110 and multiple sensor circuit 120, and wherein gate drivers 110 is in order to transmit corresponding gate drive signal (such as: gate drive signal G by signal transmssion line (such as: scan line, selection line)n、Gn+1、Gn+2... etc.) and select signal (such as: select signal Sn、Sn+1、Sn+2... etc.) respectively to corresponding sensor circuit 120 so that sensor circuit 120 is according to gate drive signal and selects signal to coordinate touch-control sensing operation to produce corresponding output signal (such as: output signal D1、D2... etc.), for judging whether touch control operation is carried out.
It should be noted that, according to different embodiments and aspect, aforementioned touch-control sensing panel 100 more can include other circuit or element (such as: data driver, display pixel, reading circuit ... etc. in order to interpretation output signal), but for the sake of for convenience and clearly illustrating, Fig. 1 illustrates partial circuit and element the most illustratively, but it is not intended to limiting the invention.
Fig. 2 is the circuit box schematic diagram illustrating sensor circuit in a kind of panel of touch-control sensing as shown in Figure 1 according to the embodiment of the present invention.As shown in Figure 2, at least one or each in aforementioned sensor circuit 120 can comprise energy-storage units 210, light sensing unit 220 and charhing unit 230, wherein light sensing unit 220 is electrically coupled to energy-storage units 210, in order to sense the first color of light, and present the electric discharge with control energy-storage units 210 of the corresponding conducting state according to the intensity of the first color of light sensed, and in order to according to a control signal (such as: gate drive signal Gn+1) turn on and energy-storage units 210 is reset (Reset).Charhing unit 230 is then electrically coupled to energy-storage units 210, and is charged energy-storage units 210 during energy-storage units 210 resets.
Secondly, aforementioned sensor circuit 120 also can include switch element MR, wherein switch element MR electric property coupling energy-storage units 210, and by gate drive signal GnControl and turn on so that the change of the voltage stored by energy-storage units 210 can export as output signal D via switch element MRnFor interpretation.In implementation, switch element MR can be nmos pass transistor or PMOS transistor according to actual demand.
Operationally, light sensing unit 220 through irradiation when, light sensing unit 220 turns on according to the intensity of experienced light, the degree that energy-storage units 210 turns on according to light sensing unit 220 is discharged by light sensing unit 220 so that the change of the voltage stored by energy-storage units 210 can export as output signal D via switch element MRnFor interpretation.On the other hand, light sensing unit 220 without irradiation when, light sensing unit 220 is according to gate drive signal Gn+1Conducting, and by selecting signal Sn+1Being charged energy-storage units 210, energy-storage units 210 is also charged by power supply signal by charhing unit 230 according to control signal conducting simultaneously so that energy-storage units 210 is chargeable to having required replacement current potential.
Thus, for the sensor circuit 120 at signal transmission path end, when energy-storage units 210 therein cannot reset to have certain voltage potential by light sensing unit 220 because of resistance capacitance load (RC loading) effect, still by charhing unit 230, energy-storage units 210 can be charged, make energy-storage units 210 the most chargeable to having required replacement current potential, avoid being caused sensing output signal with the replacement current potential of end by resistance capacitance load (RC loading) effects in signal transmission path front end different, and then the situation preventing touch control operation from judging by accident occurs.
The above-mentioned alleged operation that energy-storage units 210 is reset (Reset), it is primarily referred to as when light sensing unit 220 is without irradiation energy-storage units 210 being charged to certain potentials (such as: reset current potential), making follow-up when touch control operation is carried out, energy-storage units 210 can be experienced the intensity of light according to light sensing unit 220 and be discharged by light sensing unit 220.
In one embodiment, energy-storage units 210 can include that capacity cell, light sensing unit 220 can include photoinduction element (such as: optotransistor).Secondly, the control signal that charhing unit 230 is received can be the voltage signal in pixel control signal, scanning drive signal, selection signal or circuit on other corresponding operating node；In other words, those skilled in the art can open any signal of charhing unit 230 according to point between actual demand employing in due course.Similarly, the power supply signal that charhing unit 230 is received can also be pixel control signal, scanning drive signal, selection signal or d. c. voltage signal；In other words, those skilled in the art can use, according to actual demand, any signal that can charge energy-storage units 210.
Fig. 3 is the circuit diagram illustrating a kind of sensor circuit as shown in Figure 2 according to first embodiment of the invention.As shown in Figure 3, in sensor circuit 120a, energy-storage units 210a comprises capacity cell C1, light sensing unit 220a comprises optotransistor MP, wherein optotransistor MP electric property coupling capacity cell C1 is in running node Va, and present corresponding conducting state (such as: when light intensity is big in order to sense the intensity of the first color of light, the conducting electric current flowing through optotransistor MP increases accordingly, and when light intensity is little, the conducting electric current flowing through optotransistor MP reduces accordingly) so that capacity cell C1 discharges through optotransistor MP.Secondly, optotransistor is by control signal (such as: gate drive signal Gn+1) controlled and turn on so that capacity cell C1 resets through optotransistor MP, and by selecting signal S in reset processn+1It is charged.Charhing unit 230a then electric property coupling capacity cell C1 is in running node Va, and turns on capacity cell C1 and supply voltage V during capacity cell C1 resetsDSo that charhing unit 230a is by selecting signal Sn+1Also by supply voltage V while chargingDIt is charged, it is ensured that capacity cell C1 is chargeable to having required replacement current potential.
In one embodiment, the voltage that charhing unit 230a is stored by energy-storage units 210a is controlled optionally to be charged energy-storage units 210a.As shown in Figure 3, charhing unit 230a further includes at least one switch element (such as: switch element M1), switch element M1 has a control end, one first end and one second end, wherein control end and the second end electric property coupling capacity cell C1 of switch element M1 supplies voltage V in running node Va, first end of switch element M1 in order to electric property couplingD。
In implementation, can be nmos pass transistor or PMOS transistor according to different control modes and circuit connecting mode, optotransistor MP and switch element M1.As a example by switch element M1 is as nmos pass transistor, the grid of switch element M1 and source electrode system electric property coupling capacity cell C1 are in running node Va, and the drain electrode of switch element M1 then supplies voltage V in order to electric property couplingD。
Here, the voltage V coupled in one end of capacity cell C1CWhen for certain value, the change in voltage of running node Va can be equivalent to the change in voltage stored by capacity cell C1；In other words, switch element M1 can be equivalent to be controlled by the voltage stored by capacity cell C1, or is equivalent to be controlled by the voltage of running node Va.
Operationally, optotransistor MP through irradiation when, optotransistor MP according to experienced light intensity conducting, capacity cell C1 according to optotransistor MP conducting degree through optotransistor MP electric discharge, now switch element MR is by gate drive signal GnControl and turn on so that the change of the voltage stored by capacity cell C1 can export as output signal D via switch element MRnFor interpretation.
Secondly, when being intended to charge capacity cell C1, optotransistor MP is by gate drive signal Gn+1Control and turn on, and select signal Sn+1It is sent to capacity cell C1 through optotransistor MP and capacity cell C1 is charged, now at the voltage (or voltage of running node Va) stored by capacity cell C1 by selecting signal Sn+1When charging to certain voltage current potential, switch element M1 is controlled by the voltage stored by capacity cell C1 and is correspondingly turned on capacity cell C1 and supply voltage VDSo that capacity cell C1 can be through switch element M1 simultaneously by supply voltage VDIt is charged.
Fig. 4 is the circuit diagram illustrating a kind of sensor circuit as shown in Figure 2 according to second embodiment of the invention.Compared to the embodiment shown in Fig. 3, in the sensor circuit 120b shown in Fig. 4, charhing unit 230b comprises switch element M2 and M3.Switch element M2 has a control end, one first end and one second end, and wherein the control end electric property coupling capacity cell C1 of switch element M2 supplies voltage V in running node Va, first end of switch element M2 in order to electric property couplingD.Additionally, switch element M3 has a control end, one first end and one second end, wherein the control end of switch element M3 and the second end electric property coupling capacity cell C1 are in running node Va, second end of the first end electric property coupling switch element M2 of switch element M3.
Compared to the embodiment shown in Fig. 3, owing to charhing unit 230b further includes switch element M2, therefore more voltage V can be supplied by switch element M2 as regulation and controlDThe switch being charged, more guarantees that optotransistor MP does not makees the action charged when irradiation.
In implementation, according to different control modes and circuit connecting mode, switch element M2, M3 can be nmos pass transistor or PMOS transistor.As a example by switch element M2, M3 are nmos pass transistor, the grid of switch element M2 and the grid of switch element M3 and source electrode electric property coupling capacity cell C1 supply voltage V in running node Va, the drain electrode of switch element M2 in order to electric property couplingD, the drain electrode of the source electrode electric property coupling switch element M3 of switch element M2.Additionally, as a example by switch element M2, M3 are PMOS transistor, circuit connecting mode can be similar to aforementioned, only voltage sets difference, therefore repeats no more in this.It addition, for the size of implementation, the size being smaller in size than optotransistor MP of switch element M2, M3.
Similarly, in operation on, optotransistor MP through irradiation when, capacity cell C1 according to optotransistor MP conducting degree discharged by optotransistor MP, switch element MR is by gate drive signal GnControl and turn on so that the change of the voltage stored by capacity cell C1 can export as output signal D via switch element MRnFor interpretation.Secondly, optotransistor MP without irradiation when, optotransistor MP is by gate drive signal Gn+1Control and turn on, and select signal Sn+1It is sent to capacity cell C1 through optotransistor MP and capacity cell C1 is charged, now at the voltage (or voltage of running node Va) stored by capacity cell C1 by selecting signal Sn+1When charging to certain voltage current potential, switch element M2 and M3 is controlled by the voltage stored by capacity cell C1 and is correspondingly turned on capacity cell C1 and supply voltage VDSo that capacity cell C1 can be through switch element M2 and M3 simultaneously by supply voltage VDIt is charged.
Fig. 5 is the circuit diagram illustrating a kind of sensor circuit as shown in Figure 2 according to third embodiment of the invention.Compared to the embodiment shown in Fig. 3, in the sensor circuit 120c shown in Fig. 5, charhing unit 230b comprises switch element M4 and M5.Switch element M4 has a control end, one first end and one second end, and wherein the control end electric property coupling capacity cell C1 of switch element M4 supplies voltage V in running node Va, first end of switch element M4 in order to electric property couplingD.Additionally, switch element M5 has a control end, one first end and one second end, wherein switch element M5 control end and second end of the first end electric property coupling switch element M4, the second end electric property coupling capacity cell C1 of switch element M5 is in running node Va.
In implementation, according to different control modes and circuit connecting mode, switch element M4, M5 can be nmos pass transistor or PMOS transistor.As a example by switch element M4, M5 are nmos pass transistor, the grid electric property coupling capacity cell C1 of switch element M4 supplies voltage V in running node Va, the drain electrode of switch element M4 in order to electric property couplingD, the grid of switch element M5 and the source electrode of drain electrode electric property coupling switch element M4, the source electrode electric property coupling capacity cell C1 of switch element M5 is in running node Va.Additionally, as a example by switch element M4, M5 are PMOS transistor, circuit connecting mode can be similar to aforementioned, only voltage sets difference, therefore repeats no more in this.It addition, for the size of implementation, the size being smaller in size than optotransistor MP of switch element M4, M5.
Similarly, in operation on, optotransistor MP through irradiation when, capacity cell C1 according to optotransistor MP conducting degree through optotransistor MP discharge, switch element MR is by gate drive signal GnControl and turn on so that the change of the voltage stored by capacity cell C1 can export as output signal D via switch element MRnFor interpretation.Secondly, when being intended to charge capacity cell C1, optotransistor MP is by gate drive signal Gn+1Control and turn on, and select signal Sn+1It is sent to capacity cell C1 through optotransistor MP and capacity cell C1 is charged, now at the voltage (or voltage of running node Va) stored by capacity cell C1 by selecting signal Sn+1When charging to certain voltage current potential, switch element M4 is controlled by the voltage stored by capacity cell C1 and is correspondingly turned on, and switch element M5 also turns on according to the operation of switch element M4, whereby conducting capacity cell C1 and supply voltage VDSo that capacity cell C1 can be through switch element M4 and M5 simultaneously by supply voltage VDIt is charged.
On the other hand, for the embodiment shown in aforementioned Fig. 1, touch-control sensing panel 100 more can comprise colored filter 150, wherein colored filter 150 configures relative to the substrate at sensor circuit 120 place, and colored filter 150 comprises multiple color blocking (redness as shown in the following example, green, blue color blocking), red light, green light or the blue light that the light sent for backlight is required when penetrating and provide show image.
But, the spectral range contained due to colored filter is bigger, therefore when colored filter 150 configures relative to sensor circuit 120, when wherein light sensing unit (or optotransistor) is by light source (such as: the LED light pen of the solid color) irradiation of particular color and when carrying out touch control operation, the situation having colour mixture occurs, and in turn results in the erroneous judgement of touch control operation.
For example, Fig. 6 is the Frequency spectrum ratio relatively schematic diagram illustrating a kind of LED light pen with color blocking, wherein CF_R, CF_G, CF_B represent redness, green, the spectral range at blue color blocking place respectively, and LED_R, LED_G, LED_B represent the spectral range at the light place of redness, green, the transmitting of blue led light pen respectively.As shown in Figure 6, because LED light pen is very big with the spectral range lap at color blocking place, therefore when light sensing unit relative blueness color blocking configures, the light of green light pen can be by blue color blocking, make light sensing unit produce leakage current according to the light of green light pen, cause the situation that touch-control is judged by accident；It addition, when light sensing unit configures relative to red color resistance, the light of blue light pen can pass through red color resistance so that light sensing unit produces leakage current according to the light of blue light pen, causes the situation that touch-control is judged by accident；Secondly, when the relatively green color blocking configuration of light sensing unit, the light of red light pen can be by green color blocking so that light sensing unit produces leakage current according to the light of red light pen, causes the situation that touch-control is judged by accident.
According to above-mentioned, in the aforementioned embodiment, charhing unit more can comprise at least one Photosensing Units, and it is in order to sense one second color of light, and the intensity generation of foundation the second color of light compensates electric current accordingly in light sensing unit produces leakage current according to the second color of light when.For example, switch element M2 and M3 shown in switch element M1, Fig. 4 shown in Fig. 3 or switch element M4 and M5 shown in Fig. 5 may each be Photosensing Units, or charhing unit additionally comprises Photosensing Units, electric current is compensated accordingly, it is to avoid the situation of touch-control erroneous judgement so as to producing in leakage current produces when.
Fig. 7 is the circuit diagram illustrating a kind of sensor circuit as shown in Figure 2 according to fourth embodiment of the invention.Compared to the embodiment shown in Fig. 3, in the sensor circuit 120d shown in Fig. 7, optotransistor MP corresponds to green color blocking CF_G configuration, switch element M1(or charhing unit) correspond to the configuration of red color resistance CF_R, and switch element M1 is Photosensing Units and can be corresponding conducting state according to corresponding light intensity.
Operationally, when green LED light pen irradiation, optotransistor MP understands normal operating and turns on to produce corresponding faradic current；Additionally when red LED light pen irradiation, because the light of red LED light pen is by green color blocking CF_G, therefore optotransistor MP can produce leakage current according to red light, now element M1 can be produced compensated electric current accordingly by red color resistance CF_R sensing red light, to compensate optotransistor MP by green color blocking CF_G according to leakage current produced by red light, the leakage current that optotransistor MP is produced does not interferes with presenting of normal touch control operation signal, also red light can be avoided to cause green photoinduction distorted signals corresponding to color blocking CF_G, and then the problem improving specific color blocking and the light collocation operation of different colours light pen.
Fig. 8 is the circuit diagram illustrating a kind of sensor circuit as shown in Figure 2 according to fifth embodiment of the invention.Compared to the embodiment shown in Fig. 4, in the sensor circuit 120e shown in Fig. 8, optotransistor MP corresponds to green color blocking CF_G configuration, switch element M2 and M3(or charhing unit) correspond to the configuration of red color resistance CF_R, and switch element M2 and M3 is Photosensing Units and can be corresponding conducting state according to corresponding light intensity.
Operationally, when green LED light pen irradiation, optotransistor MP understands normal operating and turns on to produce corresponding faradic current；Additionally when red LED light pen irradiation, because the light of red LED light pen is by green color blocking CF_G, therefore optotransistor MP can produce leakage current according to red light, now element M2 and M3 can be produced compensated electric current accordingly by red color resistance CF_R sensing red light, to compensate optotransistor MP through green color blocking CF_G according to leakage current produced by red light, red light can be avoided to cause green photoinduction distorted signals corresponding to color blocking CF_G, and then the problem improving specific color blocking and the light collocation operation of different colours light pen.
Fig. 9 is the circuit diagram illustrating a kind of sensor circuit as shown in Figure 2 according to sixth embodiment of the invention.Compared to the embodiment shown in Fig. 5, in the sensor circuit 120f shown in Fig. 9, optotransistor MP corresponds to green color blocking CF_G configuration, switch element M4 and M5(or charhing unit) correspond to the configuration of red color resistance CF_R, and switch element M4 and M5 is Photosensing Units and can be corresponding conducting state according to corresponding light intensity.
Similarly, when red LED light pen irradiation, because the light of red LED light pen is by green color blocking CF_G, therefore optotransistor MP can produce leakage current according to red light, now element M4 and M5 can be produced compensated electric current accordingly by red color resistance CF_R sensing red light, to compensate optotransistor MP through green color blocking CF_G according to leakage current produced by red light, red light can be avoided to cause green photoinduction distorted signals corresponding to color blocking CF_G, and then the problem improving specific color blocking and the light collocation operation of different colours light pen.
Figure 10 is the circuit diagram illustrating a kind of sensor circuit as shown in Figure 2 according to seventh embodiment of the invention.Compared to the embodiment shown in Fig. 9, in the sensor circuit 120g shown in Figure 10, optotransistor MP corresponds to blue color blocking CF_B configuration, switch element M4 and M5(or charhing unit) correspond to the configuration of green color blocking CF_G, and switch element M4 and M5 is Photosensing Units and can be corresponding conducting state according to corresponding light intensity.
Similarly, when green LED light pen irradiation, light transmission blueness color blocking CF_B because of green LED light pen, therefore optotransistor MP can produce leakage current according to green light, now element M4 and M5 can produce compensate electric current accordingly through green color blocking CF_G sensing green light, to compensate optotransistor MP through blue color blocking CF_B according to leakage current produced by green light, green light can be avoided to cause blue photoinduction distorted signals corresponding to color blocking CF_B, and then the problem improving specific color blocking and the light collocation operation of different colours light pen.
The similar above-mentioned compensation way of situation of the configuration of other different colours color blocking and different colours light collocation operation, and can the rest may be inferred, therefore repeat no more in this.
From the above, apply aforementioned embodiments of the invention effectively to improve and cause sensing, because of resistance capacitance load (RC loading) effect, the situation that output signal is wrong, and then the situation preventing touch control operation from judging by accident occurs, and the problem that the light collocation that more can improve specific color blocking and different colours light pen operates and produces leakage current, it is to avoid affect the generation of normal touching signals.
Certainly; the present invention also can have other various embodiments; in the case of without departing substantially from present invention spirit and essence thereof; those of ordinary skill in the art are when making various corresponding change and deformation according to the present invention, but these change accordingly and deform the protection domain that all should belong to appended claims of the invention.
Claims (8)
1. a sensor circuit, it is characterised in that comprise:
One energy-storage units；
One light sensing unit, is electrically coupled to this energy-storage units, in order to sense one first color of light, and foundation
The intensity of this first color of light sensed presents corresponding conducting state to control the electric discharge of this energy-storage units,
And in order to this energy-storage units is reset according to a control signal conducting；And
One charhing unit, is electrically coupled to this energy-storage units, and to this during this energy-storage units resets
Energy-storage units is charged；
Wherein this charhing unit further includes:
At least one Photosensing Units, in order to sense one second color of light, and in this light sensing unit according to this
Produce according to the intensity of this second color of light when second colors light produces leakage current and compensate electric current accordingly.
Sensor circuit the most according to claim 1, it is characterised in that wherein this charhing unit is by this
The voltage that energy-storage units stores is controlled optionally to be charged this energy-storage units.
Sensor circuit the most according to claim 1 and 2, it is characterised in that wherein this energy-storage units
Further including a capacity cell, this charhing unit further includes at least one switch element, and this at least one switch element is used
With according to this capacity cell of voltage turn-on stored by this capacity cell and a supply voltage.
4. a touch-control sensing panel, it is characterised in that comprise:
Multiple sensor circuits, in these sensor circuits, each comprises:
One capacity cell；
One optotransistor, this capacity cell of electric property coupling is in a running node, in order to sense one first color of light
Intensity and present corresponding conducting state so that this capacity cell discharges through this optotransistor, its
In this optotransistor controlled by a control signal and turned on so that this capacity cell enters through this optotransistor
Row resets；And
One charhing unit, this capacity cell of electric property coupling is in this running node, and resets in this capacity cell
During turn on this capacity cell and one supply voltage；
Wherein this charhing unit further includes:
One switch element, has a control end, one first end and one second end, wherein this control end and this
Two these capacity cells of end electric property coupling are in this running node, and this first end is in order to this supply voltage of electric property coupling.
Touch-control sensing panel the most according to claim 4, it is characterised in that wherein this charhing unit
Further include:
One first switch element, has a control end, one first end and one second end, wherein this control end electricity
Property couples this capacity cell in this running node, and this first end is in order to this supply voltage of electric property coupling；And
One second switch element, has a control end, one first end and one second end, wherein this control end and
This second end this capacity cell of electric property coupling is in this running node, and this first switch of this first end electric property coupling is first
This second end of part.
Touch-control sensing panel the most according to claim 4, it is characterised in that wherein this charhing unit
Further include:
One first switch element, has a control end, one first end and one second end, wherein this control end electricity
Property couples this capacity cell in this running node, and this first end is in order to this supply voltage of electric property coupling；And
One second switch element, has a control end, one first end and one second end, wherein this control end and
This second end of this first end this first switch element of electric property coupling, this second end this capacity cell of electric property coupling
In this running node.
7. according to the touch-control sensing panel according to any one of claim 4 to 6, it is characterised in that more
Comprise:
One colored filter, comprises multiple color blocking, and wherein these color blockings further include the one the of tool one first color
One color blocking and one second color blocking of tool one second color, this first color blocking this optotransistor corresponding configures,
This second color blocking this charhing unit corresponding configures.
Touch-control sensing panel the most according to claim 4, it is characterised in that further include:
One colored filter, comprises multiple color blocking, and wherein these color blockings further include one first color blocking and one
Two color blockings, this first color blocking this optotransistor corresponding configures, and this second color blocking this charhing unit corresponding is joined
Put；
Wherein this charhing unit further includes at least one Photosensing Units, and this at least one Photosensing Units is in order to pass through
This second color blocking sensing one second color of light and produce and compensate electric current accordingly, pass through compensating this optotransistor
This first color blocking is according to leakage current produced by this second color of light.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| TW102120743A TWI507946B (en) | 2013-06-11 | 2013-06-11 | Touch sensing panel and sensing circuit therein |
| TW102120743 | 2013-06-11 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103488349A CN103488349A (en) | 2014-01-01 |
| CN103488349B true CN103488349B (en) | 2016-08-10 |
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ID=49828630
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310339745.6A Active CN103488349B (en) | 2013-06-11 | 2013-08-06 | Touch control induction panel and induction circuit therein |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN103488349B (en) |
| TW (1) | TWI507946B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI608387B (en) | 2014-01-22 | 2017-12-11 | 友達光電股份有限公司 | Touch panel |
| CN105044952B (en) * | 2015-08-27 | 2018-05-22 | 京东方科技集团股份有限公司 | A kind of optical sensor and its driving method |
| CN113869096A (en) * | 2020-06-30 | 2021-12-31 | 敦泰电子股份有限公司 | Fingerprint pixel unit, fingerprint display apparatus, and integrated circuit and method for driving the same |
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Also Published As
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| CN103488349A (en) | 2014-01-01 |
| TW201447689A (en) | 2014-12-16 |
| TWI507946B (en) | 2015-11-11 |
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