CN101101525A - Touching control panel - Google Patents
Touching control panel Download PDFInfo
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- CN101101525A CN101101525A CNA2007101411491A CN200710141149A CN101101525A CN 101101525 A CN101101525 A CN 101101525A CN A2007101411491 A CNA2007101411491 A CN A2007101411491A CN 200710141149 A CN200710141149 A CN 200710141149A CN 101101525 A CN101101525 A CN 101101525A
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Abstract
The touch control type faceplate includes multiple pixels. Each pixel includes a sensitization element, a pressure-sensing element, and a switch. When sensing, the sensitization element generates first sense signal. When being pressed, the pressure-sensing element generates second sense signal. The switch includes following parts: a first end connected to the sensitization element and the pressure-sensing element; a control end in use for receiving a signal driven by a grid; and a second end in use for transferring the first sense signal and the second sense signal based on the said signal driven by the grid. Thuds, in the invention, even if there is no light source on surrounding environment, pixels can determine whether the touch control type faceplate is set a finger on based on capacitance magnitude of variable capacity.
Description
Technical field
The present invention is about a kind of touch panel, especially in regard to a kind of touch panel with pixel of photo-sensitive cell and sensing element.
Background technology
Please refer to Fig. 1.Fig. 1 is the synoptic diagram of the touch panel pixel Pa of prior art.As shown in the figure, pixel Pa comprises switch SW, photo-sensitive cell PD.Switch SW can be a thin film transistor (TFT) (Thin FilmTransistor, TFT); Photo-sensitive cell PD can be a photodiode (photo diode).Photo-sensitive cell PD one end is coupled to second end of switch SW, and the other end is coupled to a bias generator Vb.When photo-sensitive cell PD receives light source when (representing not touched), just can produce electric current I, and current potential Va is pulled down to Vb; Otherwise,, just can not produce electric current I, and current potential Va just can keep original level when photo-sensitive cell PD does not receive light source when (representing touched).Second end that first end that the control end of switch SW is coupled to the pairing gate line of pixel Pa, switch SW is coupled to the pairing data read line of pixel Pa, switch SW is coupled to the end of photo-sensitive cell PD, when the control end of switch SW receives gate drive signal that corresponding gate line transmits and when first end of switch SW is coupled to second end, the pairing data read line of pixel Pa just can receive the current potential Va on second end of switch SW.And the touch panel of prior art is according to the height of current potential Va, and it is touched to judge whether pixel Pa has.
Yet, the shortcoming of the pixel Pa of the touch panel of prior art is when not having light source in the surrounding environment (as touch panel being placed dark place), in any case then photo-sensitive cell PD all can't experience light source and produce electric current, therefore it is touched to have no way of also learning whether pixel Pa has, the touch panel made from pixel Pa thus, its usable range will enjoy restriction, and reduce user's convenience greatly.
Summary of the invention
The invention provides a kind of touch panel.This touch panel comprises a plurality of pixels, and each pixel comprises a photo-sensitive cell, produces one first sensing signal when sensitization; One sensing element produces one second sensing signal when pressurized; And a switch, comprise: one first end is coupled to this photo-sensitive cell and this sensing element; One control end is in order to receive a gate drive signal; And one second end, in order to according to this gate drive signal, transmit this first sensing signal and this second sensing signal.
Above-mentioned touch panel wherein preferably, also comprises many gate lines, in order to transmit the switch of a plurality of gate drive signals to described a plurality of pixels.
Above-mentioned touch panel wherein preferably, also comprises many data read lines, is coupled to second end of each switch of described a plurality of pixels, in order to transmit this first sensing signal or this second sensing signal.
Above-mentioned touch panel, wherein preferably, this photo-sensitive cell comprises a photodiode, and this photodiode comprises: one first end is coupled to one first voltage; One control end is coupled to first end of this photodiode; Reach one second end, be coupled to first end of this switch.
Above-mentioned touch panel, wherein preferably, this sensing element comprises a variable capacitance, and an end is coupled to first end of this switch, and the other end is coupled to one second voltage, changes the size of its capacitance when pressurized.
Above-mentioned touch panel wherein preferably, also comprises a plurality of testing circuits, receives first sensing signal and second sensing signal carried by described many data read lines.
Above-mentioned touch panel, wherein preferably, arbitrary described testing circuit comprises: an amplifier comprises: a positive input terminal, in order to receive a reference voltage; One negative input end is coupled to arbitrary described many data read lines; And an output terminal, in order to the voltage of output according to this first and second sensing signal conversion; One electric capacity is coupled between the output terminal and negative input end of this amplifier; And a switch, be coupled between the output terminal and negative input end of this amplifier, in order to the corresponding gate drive signal of receiving according to this pixel-by-pixel basis this amplifier input terminal is coupled to output terminal.
The present invention also provides a kind of touch panel.This touch panel comprises a plurality of first pixels, and each first pixel comprises a photo-sensitive cell, produces one first sensing signal when sensitization; And a switch, comprise one first end, be coupled to this photo-sensitive cell; One control end is in order to receive a first grid drive signal; And one second end, in order to according to this first grid drive signal, transmit this first sensing signal; And a plurality of second pixels, each second pixel comprises a sensing element, produces one second sensing signal when pressurized; And a switch, comprise one first end, be coupled to this sensing element; One control end is in order to receive a second grid drive signal; And one second end, in order to according to this second grid drive signal, transmit this second sensing signal.
By the present invention, even when surrounding environment does not all have light source, pixel also can be according to the capacitance size of variable capacitance, detect whether have touched.
Description of drawings
Fig. 1 is the synoptic diagram of the touch panel pixel of prior art.
Fig. 2 is the synoptic diagram of the pixel of touch panel of the present invention.
Fig. 3 is the synoptic diagram of another pixel of the present invention.
Fig. 4 is the synoptic diagram according to the touch panel of the first embodiment of the present invention.
Fig. 5 is the synoptic diagram of touch panel according to a second embodiment of the present invention.
Wherein, description of reference numerals is as follows:
Pa Pb Pc pixel
The PD photo-sensitive cell
The Cv variable capacitance
Cfb electric capacity
The I electric current
SW SW2 switch
Va Vcom Vb voltage
210 integrators
211 amplifiers
400 500 touch panels
410 gate driver circuits
420 data reading circuits
S1 S2 S3 gate drive signal
Embodiment
Please refer to Fig. 2.Fig. 2 is the synoptic diagram of the pixel Pb of touch panel of the present invention.As shown in the figure, pixel Pb and pixel Pa are similar, and same section repeats no more in this, and difference is that the newly-increased variable capacitance Cv of pixel Pb is in second end of switch SW.Variable capacitance Cv one end is coupled to second end of switch SW, and the other end is coupled to a common ends Vcom (just being loaded with voltage Vcom on the common ends).And when pixel Pb was touched, the capacitance size of variable capacitance Cv will change, and therefore also can influence the size of current potential Va.Thus, when pixel Pb was not touched, photo-sensitive cell PD can produce electric current I and influence current potential Va; When pixel was touched, photo-sensitive cell PD can not produce electric current I but the capacitance change of variable capacitance Cv also can influence current potential Va.In other words, when surrounding environment did not all have light source, pixel Pb also can be according to the capacitance size of variable capacitance Cv, detect whether have touched.
In addition, in Fig. 2, on the data read line of pixel Pb correspondence, coupled an integrator 210 (testing circuit), touched with helping to judge whether pixel Pb has.Integrator 210 has comprised a switch SW 2, a capacitor C fb, an amplifier 211.The positive input terminal of amplifier 211 is coupled to a reference voltage source, in order to receive a reference voltage Vref, negative input end is coupled to pairing data read line, output terminal in order to export an output voltage V out; Switch SW 2 is coupled between the negative input end and output terminal of amplifier 211; Capacitor C fb is coupled between the negative input end and output terminal of amplifier.When pixel Pb received corresponding gate drive signal, switch SW 2 was a closed condition, just opens circuit; And when pixel Pb did not receive corresponding gate drive signal again, switch SW 2 was an opening, just the negative input end of amplifier 211 is coupled to the output terminal of amplifier 211.
When variable capacitance Cv was not touched, its capacitance was Cst1; When variable capacitance Cv was touched, its capacitance became Cst2.It is that the output voltage of Q (max)=Cst1 (Vref-Vcom), integrator 210 is Vout (max)=Cst1 (Vref-Vcom)/Cfb to the maximum that variable capacitance Cv can store maximum electric charge.Under not touched state (photo-sensitive cell PD has sensitization), the output voltage of integrator 210
Wherein Va (t) represents the voltage of current potential Va, and Tf represents the time that picture upgraded, and I is the electric current of photo-sensitive cell PD institute conducting.Under touched state (photo-sensitive cell PD does not have sensitization), photo-sensitive cell PD is no current I conducting just, thus the output voltage V out=of integrator 210 (Cst2-Cst1) (Vcom-Vref)/Cfb.Find out by above-mentioned, the voltage Vout that integrator 210 is exported, pixel Pb have touched and not touched state under, be difference to some extent, therefore can to judge effectively in view of the above whether pixel Pb has touched.
Please refer to Fig. 3.Fig. 3 is the synoptic diagram of another pixel Pc of the present invention.Pixel Pc and pixel Pb are similar, and difference only is to have lacked photo-sensitive cell PD among the pixel Pc, and so pixel Pc can be directly according to the variation of variable capacitance Cv capacitance, detected not touched, and the use of saving photo-sensitive cell PD.
Please refer to Fig. 4.Fig. 4 is the synoptic diagram according to the touch panel 400 of the first embodiment of the present invention.As shown in the figure, touch panel 400 has comprised gate driver circuit 410, data reading circuit 420, a plurality of integrator (testing circuit) 210 and a plurality of pixel Pb.Gate driver circuit 410 is in order to transmitting gate drive signal S1, S2, S3... etc. respectively in regular turn to corresponding pixel, and the gate drive signal that data reading circuit 420 is also transmitted according to gate driver circuit 410 goes to detect corresponding pixel whether touched (the output voltage V out by integrator 210 judges) is arranged.It is touched and improve user's convenience which pixel touch panel 400 can effectively detect thus.
Please refer to Fig. 5.Fig. 5 is the synoptic diagram of touch panel 500 according to a second embodiment of the present invention.As shown in the figure, touch panel 500 has comprised gate driver circuit 410, data reading circuit 420, a plurality of integrator 210 and a plurality of pixel Pa, Pc.Gate driver circuit 410 is in order to transmitting gate drive signal S1, S2, S3... etc. respectively in regular turn to corresponding pixel, and the gate drive signal that data reading circuit 420 is also transmitted according to gate driver circuit 410 goes to detect corresponding pixel whether touched (the output voltage V out by integrator 210 judges) is arranged.It is touched and improve user's convenience which pixel touch panel 500 can effectively detect thus.
Though the present invention discloses as above with preferred embodiment; yet it is not in order to qualification the present invention, any those skilled in the art, without departing from the spirit and scope of the present invention; still can do a little change and retouching, so protection scope of the present invention is as the criterion when looking the scope that claim defines.
Claims (14)
1. touch panel comprises:
A plurality of pixels, each pixel comprises:
One photo-sensitive cell produces one first sensing signal when sensitization;
One sensing element produces one second sensing signal when pressurized; And
One switch comprises:
One first end is coupled to this photo-sensitive cell and this sensing element;
One control end is in order to receive a gate drive signal; And
One second end in order to according to this gate drive signal, transmits this first sensing signal and this second sensing signal.
2. touch panel as claimed in claim 1 also comprises many gate lines, in order to transmit the switch of a plurality of gate drive signals to described a plurality of pixels.
3. touch panel as claimed in claim 1 also comprises many data read lines, is coupled to second end of each switch of described a plurality of pixels, in order to transmit this first sensing signal or this second sensing signal.
4. touch panel as claimed in claim 1, wherein this photo-sensitive cell comprises a photodiode, and this photodiode comprises:
One first end is coupled to one first voltage;
One control end is coupled to first end of this photodiode; And
One second end is coupled to first end of this switch.
5. touch panel as claimed in claim 1, wherein this sensing element comprises a variable capacitance, and an end is coupled to first end of this switch, and the other end is coupled to one second voltage, changes the size of its capacitance when pressurized.
6. touch panel as claimed in claim 1 also comprises a plurality of testing circuits, receives first sensing signal and second sensing signal carried by described many data read lines.
7. touch panel as claimed in claim 6, wherein arbitrary described testing circuit comprises:
One amplifier comprises:
One positive input terminal is in order to receive a reference voltage;
One negative input end is coupled to arbitrary described many data read lines; And
One output terminal is in order to the voltage of output according to this first and second sensing signal conversion;
One electric capacity is coupled between the output terminal and negative input end of this amplifier; And
One switch is coupled between the output terminal and negative input end of this amplifier, in order to the corresponding gate drive signal of receiving according to this pixel-by-pixel basis this amplifier input terminal is coupled to output terminal.
8. touch panel comprises:
A plurality of first pixels, each first pixel comprises:
One photo-sensitive cell, having or not and produce one first sensing signal in order to light sensing; And
One switch comprises:
One first end is coupled to this photo-sensitive cell;
One control end is in order to receive a first grid drive signal; And
One second end in order to according to this first grid drive signal, transmits this first sensing signal; And
A plurality of second pixels, each second pixel comprises:
One sensing element is in order to pressure sensor and produce one second sensing signal; And
One switch comprises:
One first end is coupled to this sensing element;
One control end is in order to receive a second grid drive signal; And
One second end in order to according to this second grid drive signal, transmits this second sensing signal.
9. touch panel as claimed in claim 8 also comprises many gate driving lines, in order to transmit a plurality of first grid drive signals and a plurality of second grid drive signal respectively to the switch of described a plurality of first pixels and the switch of described a plurality of second pixels.
10. touch panel as claimed in claim 8 also comprises many data read lines, is coupled to second end of each switch of described a plurality of first pixel and described second pixel, in order to transmit this first sensing signal or this second sensing signal.
11. touch panel as claimed in claim 8, wherein this photo-sensitive cell comprises a photodiode, and this photodiode comprises:
One first end is coupled to one first voltage;
One control end is coupled to first end of this photodiode; And
One second end is coupled to first end of the switch of this first pixel.
12. touch panel as claimed in claim 8, wherein this sensing element comprises a variable capacitance, and an end is coupled to first end of the switch of this second pixel, and the other end is coupled to one second voltage, changes the size of its capacitance when pressurized.
13. touch panel as claimed in claim 8 also comprises a plurality of testing circuits, receives first sensing signal and second sensing signal carried by described many data read lines.
14. touch panel as claimed in claim 13, wherein arbitrary described testing circuit comprises:
One amplifier comprises:
One positive input terminal is in order to receive a reference voltage;
One negative input end is coupled to arbitrary described many data read lines; And
One output terminal is in order to the voltage of output according to this first and second sensing signal conversion;
One electric capacity is coupled between the output terminal and negative input end of this amplifier; And
One switch is coupled between the output terminal and negative input end of this amplifier, in order to the corresponding gate drive signal of receiving according to this first pixel-by-pixel basis this amplifier input terminal is coupled to output terminal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007101411491A CN100535844C (en) | 2007-08-08 | 2007-08-08 | Touching control panel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007101411491A CN100535844C (en) | 2007-08-08 | 2007-08-08 | Touching control panel |
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| Publication Number | Publication Date |
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| CN101101525A true CN101101525A (en) | 2008-01-09 |
| CN100535844C CN100535844C (en) | 2009-09-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB2007101411491A Active CN100535844C (en) | 2007-08-08 | 2007-08-08 | Touching control panel |
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| CN108886361A (en) * | 2018-06-21 | 2018-11-23 | 深圳市汇顶科技股份有限公司 | A kind of key substrate removing method, capacitance key detection circuit and intelligent terminal |
| WO2019241968A1 (en) * | 2018-06-21 | 2019-12-26 | 深圳市汇顶科技股份有限公司 | Method for eliminating button base, capacitive button detection circuit and intelligent terminal |
| CN108886361B (en) * | 2018-06-21 | 2022-04-12 | 深圳市汇顶科技股份有限公司 | Key substrate eliminating method, capacitive key detection circuit and intelligent terminal |
| CN111750905A (en) * | 2019-03-29 | 2020-10-09 | 财团法人工业技术研究院 | Micro-electromechanical sensing device capable of adjusting induction capacitance value |
| CN111750905B (en) * | 2019-03-29 | 2023-05-09 | 财团法人工业技术研究院 | Micro-electromechanical sensing device capable of adjusting induction capacitance value |
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| Publication number | Publication date |
|---|---|
| CN100535844C (en) | 2009-09-02 |
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