CN102904562B - Multisampling frequency circuit and multisampling frequency method - Google Patents
Multisampling frequency circuit and multisampling frequency method Download PDFInfo
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- CN102904562B CN102904562B CN201110214403.2A CN201110214403A CN102904562B CN 102904562 B CN102904562 B CN 102904562B CN 201110214403 A CN201110214403 A CN 201110214403A CN 102904562 B CN102904562 B CN 102904562B
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Abstract
The invention provides a multisampling frequency circuit and a multisampling frequency method which are applicable to a touch device. The multisampling frequency circuit comprises a transmitter, a receiver, a plurality of clock pulse generators and a switcher, wherein the transmitter is used for transmitting a detection signal to the touch device according to a working sampling frequency, the receiver is used for receiving a position signal from the touch device according to the working sampling frequency, the clock pulse generators are used for generating multiple sampling frequencies, and the switcher is used for selecting one of the clock pulse generators as a working clock pulse generator according to a switching signal and outputting the working sampling frequency generated by the working clock pulse generator to the transmitter and the receiver. Success rate of reading is increased by the aid of the multiple sampling frequencies, and use fluency of the touch device is improved.
Description
Technical field
The present invention relates to a kind of multiple sampling frequency circuit, particularly relate to the multiple sampling frequency circuit being applicable to contactor control device.
Background technology
In the design of traditional contact panel (touch penal), control circuit reads signal according to a sampling frequency (sampling rate) from touch-control sensor (touch sensor).When various interference source produces (such as: the voltage cycle of mobile phone signal, 60Hz), control circuit will adjust sampling frequency to avoid read error.
Fig. 1 is the procedure chart of the control circuit adjustment sampling frequency showing known contact panel.At the beginning, sampling frequency is Frequency point f1 (frequency range in Fig. 1, representing Frequency point f1 also can be Gaussian Profile frequency range centered by Frequency point f1).When control circuit finds that signal is interfered, sampling frequency is adjusted to Frequency point f2.If signal is still interfered, then again sampling frequency is adjusted to Frequency point f3, the rest may be inferred.
But in the process of adjustment sampling frequency, control circuit cannot read any signal by touch-control sensor, and this will cause the slack use experience of user.
Summary of the invention
In order to solve the problem, the invention provides a kind of multiple sampling frequency circuit, utilize multiple sampling frequency to improve and reading successful probability, adding the use fluency of contactor control device.
The invention provides a kind of multiple sampling frequency circuit, be applicable to a contactor control device, comprise: a reflector, in order to transmit a detection signal to above-mentioned contactor control device according to a working sampling frequency; One receiver, in order to according to the position signalling of above-mentioned working sampling frequency reception from above-mentioned contactor control device; Multiple gate generator, in order to produce multiple sampling frequency; And a switch, according to a switching signal, select one of above-mentioned gate generator as a work clock pulse generator, and the above-mentioned working sampling frequency exporting above-mentioned work clock pulse generator is to above-mentioned reflector and above-mentioned receiver.
In addition, the invention provides a kind of multiple sampling frequency approach, be applicable to a contactor control device, comprise: produce multiple sampling frequency; And according to a switching signal, select one of above-mentioned sampling frequency as a working sampling frequency, and export above-mentioned working sampling frequency to a reflector and a receiver, wherein above-mentioned reflector is in order to transmit a detection signal to above-mentioned contactor control device according to above-mentioned working sampling frequency, and above-mentioned receiver is in order to according to the position signalling of above-mentioned working sampling frequency reception from above-mentioned contactor control device.
The present invention utilizes multiple sampling frequency to improve and reads successful probability, adds the use fluency of contactor control device.
Accompanying drawing explanation
Fig. 1 is the procedure chart of the control circuit adjustment sampling frequency showing known contact panel;
Fig. 2 is the schematic diagram of the multiple sampling frequency circuit of display according to one embodiment of the invention;
Fig. 3 A is the schematic diagram of the multiple sampling frequency circuit of display according to another embodiment of the present invention;
Fig. 3 B is the schematic diagram of the sense cycle of the multiple sampling frequency circuit of display according to another embodiment of the present invention;
Fig. 4 is the flow chart of the multiple sampling frequency approach of display according to one embodiment of the invention;
Fig. 5 is the flow chart of the multiple sampling frequency approach of display according to another embodiment of the present invention.
Wherein, description of reference numerals is as follows:
200,300 ~ multiple sampling frequency circuit;
202 ~ contactor control device;
204 ~ reflector;
206 ~ receiver;
208-1,208-2 ..., 208-N ~ gate generator;
210 ~ switch;
212 ~ microcontroller;
400,500 ~ flow chart;
A1 ~ detection signal;
A2 ~ position signalling;
CLK1, CLK2 ..., CLKN ~ sampling frequency;
CLKO ~ working sampling frequency;
F1, f2, f3 ~ Frequency point;
SF ~ Frequency Hopping Signal;
SR ~ return signal;
SS ~ switching signal;
T1, T2, T3, T4, T5, T6, T7, T8 ~ sense cycle;
TX ~ regulation time.
Embodiment
Fig. 2 is the schematic diagram of the multiple sampling frequency circuit 200 of display according to one embodiment of the invention.As shown in Figure 2, multiple sampling frequency circuit 200 goes for contactor control device 202, and comprise: reflector 204, receiver 206, multiple gate generator 208-1,208-2 ..., 208-N (N be more than or equal to 2 positive integer), switch 210, and microcontroller 212.Contactor control device 202 can comprise contact panel, touch-control sensor etc.
Reflector 204 can transmit detection signal A1 to contactor control device 202 according to working sampling frequency CLKO.Receiver 206 can receive from the position signalling A2 of contactor control device 202, to obtain the touch information (such as: the position of touch-control, pressure) of user according to working sampling frequency CLKO.Multiple gate generator 208-1,208-2 ..., 208-N can in order to produce multiple sampling frequency CLK1, CLK2 ..., CLKN, such as: gate generator 208-1 produce sampling frequency CLK1 ..., gate generator 208-N produces sampling frequency CLKN, wherein, sampling frequency CLK1, CLK2 ..., CLKN is respectively different frequencies.Gate generator can be voltage controlled oscillator (voltage control oscillator, VCO).Switch 210 can according to switching signal SS select multiple gate generator 208-1,208-2 ..., one of 208-N as work clock pulse generator, and the working sampling frequency CLKO of output services gate generator is to reflector 204 and receiver 206.For example, if switching signal SS instruction selects gate generator 208-1 to be work clock pulse generator, then working sampling frequency CLKO is exactly sampling frequency CLK1.
Microcontroller 212 can be independently controller, also can be a part of central processing unit (CPU).Microcontroller 212 can input according to user and produce different switching signal SS, such as: produce switching signal SS and make switch 210 in different sense cycle (frame), sequentially select respectively gate generator 208-1,208-2 ..., 208-N is used as work clock pulse generator, then working sampling frequency CLKO also can sequentially switch to sampling frequency CLK1, CLK2 ..., CLKN.The present invention selects different working sampling frequency CLKO in different sense cycle, can reduce the probability that single frequency band is interfered, and the negative effect caused when reducing adjustment working sampling frequency CLKO.This advantage describes in detail in embodiment afterwards.
In addition, microcontroller 212 can receive the return signal SR from receiver 206, and determine whether transmit Frequency Hopping Signal SF to work clock pulse generator according to return signal SR, such as: if when the position signalling A2 that return signal SR instruction receives is interfered (such as: position signalling A2 is incorrect voltage level, or position signalling A2 instruction exceedes the position of touch number of the upper limit), namely microcontroller 212 transmits Frequency Hopping Signal SF to the work clock pulse generator now selected.Carry out in the process of adjusting frequency at current work clock pulse generator, switch 210 also can select another untapped gate generator again, work on as new work clock pulse generator, to reduce the process of the adjusting frequency impact for whole system.Frequency Hopping Signal SF can pass to separately work clock pulse generator, also can pass to simultaneously multiple gate generator 208-1,208-2 ..., 208-N, but only have the work clock pulse generator now selected can this signal of interpretation.When the work clock pulse generator selected receives Frequency Hopping Signal SF, working sampling frequency CLKO is converted to second frequency by first frequency by work clock pulse generator, and wherein first frequency is different with second frequency.If second frequency is still disturbed, working sampling frequency CLKO also can be switched to the 3rd different frequencies, the 4th frequency by work clock pulse generator again, and the rest may be inferred.
Fig. 3 A is the schematic diagram of the multiple sampling frequency circuit 300 of display according to another embodiment of the present invention.Fig. 3 B is the schematic diagram of the sense cycle of the multiple sampling frequency circuit 300 of display according to another embodiment of the present invention.Below will with in Fig. 3 A, Fig. 3 B, N equals the example of 2 to describe the present invention in detail.
Multiple sampling frequency circuit 300 only comprises two gate generators 208-1,208-2, and microcontroller 212 produces control signal SS, makes switch 210 select gate generator 208-1,208-2 as work clock pulse generator in turn.
As shown in Figure 3 B, according to time order and function order, multiple sampling frequency circuit 300 different sense cycle T1, T2 ..., select sampling frequency CLK1, CLK2 as working sampling frequency CLKO in turn in T8.In odd number sense cycle (odd frame) T1, T3, T5, T7, working sampling frequency CLKO is sampling frequency CLK1; And in even number sense cycle (even frame) T2, T4, T6, T8, working sampling frequency CLKO is sampling frequency CLK2.Sense cycle T1 herein, T2 ..., T8 only for convenience of description, in fact can have more sense cycle.It should be noted that and select the mode of sampling frequency to be not limited thereto in turn, in other embodiments of the present invention, multiple sampling frequency circuit 300 also can select sampling frequency CLK1 to be working sampling frequency CLKO in sense cycle T1, T2, T5, T6; And in sense cycle T3, T4, T7, T8, select sampling frequency CLK2 to be working sampling frequency CLKO.
For example, in sense cycle T1, reflector 204 transmits detection signal A1 to contactor control device 202 according to sampling frequency CLK1, and receiver 206 also receives the position signalling A2 from contactor control device 202 according to sampling frequency CLK1.If receiver 206 finds that position signalling A1 is interfered, send back the number of notifying SR and make microcontroller 212 transmit Frequency Hopping Signal SF to work clock pulse generator now, i.e. gate generator 208-1.Namely gate generator 208-1 starts to adjust sampling frequency CLK1, is converted to second frequency by first frequency.The time that adjustment process spends is regulation time TX, and in during this section, gate generator 208-1 cannot produce correct sampling frequency.As shown in Figure 3 B, gate generator 208-1 just adjusts sampling frequency CLK1 success when sense cycle T6, and therefore, in sense cycle T3, T5, multiple sampling frequency circuit 300 cannot obtain the touch information of user according to sampling frequency CLK1.But multiple sampling frequency circuit 300 still can obtain the touch information of user in sense cycle T2, T4 according to sampling frequency CLK2, reduce the negative effect during regulation time TX.
The chance be simultaneously interfered due to multiple sampling frequency is low far beyond single sampling frequency, the use contactor control device that multiple sampling frequency circuit provided by the present invention can allow user more smooth.
Fig. 4 is the flow chart 400 of the multiple sampling frequency approach of display according to one embodiment of the invention, and this multiple sampling frequency approach is applicable to contactor control device.As shown in Figure 4, first start, in step S402, produce multiple sampling frequency.Then, in step S404, according to switching signal, select one of multiple sampling frequency as working sampling frequency, and output services sampling frequency is to reflector and receiver, wherein reflector is in order to transmit detection signal to contactor control device according to working sampling frequency, and receiver is in order to according to the position signalling of working sampling frequency reception from contactor control device.On the other hand, multiple sampling frequency in different sense cycle, sequentially can be selected as working sampling frequency respectively.In step S406, receive the return signal from receiver, and whether indicating positions signal is interfered to judge return signal? if be interfered, in step S408, working sampling frequency is converted to second frequency by first frequency; If interference-free, in step S410, maintenance work sampling frequency is first frequency, and flow process terminates.
Fig. 5 is the flow chart 500 of the multiple sampling frequency approach of display according to another embodiment of the present invention, and this multiple sampling frequency approach is applicable to contactor control device.As shown in Figure 5, first start, in step S510, produce multiple sampling frequency.Then, in step S520, according to switching signal, select one of multiple sampling frequency as working sampling frequency, and output services sampling frequency is to reflector and receiver, flow process terminates.Wherein reflector is in order to transmit detection signal to contactor control device according to working sampling frequency, and receiver is in order to according to the position signalling of working sampling frequency reception from contactor control device.
Though the present invention discloses as above with preferred embodiment; so itself and be not used to limit scope of the present invention; any those of ordinary skill in the art; without departing from the spirit and scope of the present invention; when doing a little change and retouching, the scope that therefore protection scope of the present invention ought define depending on appended claim is as the criterion.
Claims (6)
1. a multiple sampling frequency circuit, is applicable to a contactor control device, comprises:
One reflector, in order to transmit a detection signal to above-mentioned contactor control device according to a working sampling frequency;
One receiver, in order to according to the position signalling of above-mentioned working sampling frequency reception from above-mentioned contactor control device;
Multiple gate generator, in order to produce multiple sampling frequency; And
One switch, be coupled to described multiple gate generator, in order to according to a switching signal, select one of described multiple gate generator as a work clock pulse generator, and the above-mentioned working sampling frequency exporting above-mentioned work clock pulse generator is to above-mentioned reflector and above-mentioned receiver;
Wherein above-mentioned multiple sampling frequency circuit, also comprises:
One microcontroller, in order to produce above-mentioned switching signal, and the return signal received from above-mentioned receiver, whether to transmit a Frequency Hopping Signal to above-mentioned work clock pulse generator according to above-mentioned return signal deciding, if wherein the above-mentioned position signalling of above-mentioned return signal designation is interfered, then above-mentioned microcontroller transmits above-mentioned Frequency Hopping Signal to above-mentioned work clock pulse generator.
2. multiple sampling frequency circuit as claimed in claim 1, if wherein above-mentioned work clock pulse generator receives above-mentioned Frequency Hopping Signal, then above-mentioned working sampling frequency is converted to a second frequency by a first frequency by above-mentioned work clock pulse generator, and wherein above-mentioned first frequency is different with above-mentioned second frequency.
3. multiple sampling frequency circuit as claimed in claim 1, wherein above-mentioned switch is according to above-mentioned switching signal, sequentially selects above-mentioned gate generator as above-mentioned work clock pulse generator respectively.
4. a multiple sampling frequency approach, is applicable to a contactor control device, comprises:
Produce multiple sampling frequency; And
According to a switching signal, select one of above-mentioned sampling frequency as a working sampling frequency, and export above-mentioned working sampling frequency to a reflector and a receiver;
Wherein above-mentioned reflector is in order to transmit a detection signal to above-mentioned contactor control device according to above-mentioned working sampling frequency, and above-mentioned receiver is in order to according to the position signalling of above-mentioned working sampling frequency reception from above-mentioned contactor control device;
Wherein above-mentioned multiple sampling frequency approach, also comprises:
Receive the return signal from above-mentioned receiver, and whether above-mentioned working sampling frequency is converted to a second frequency by a first frequency according to above-mentioned return signal deciding, wherein above-mentioned first frequency is different with above-mentioned second frequency.
5. multiple sampling frequency approach as claimed in claim 4, if wherein the above-mentioned position signalling of above-mentioned return signal designation is interfered, then determines above-mentioned working sampling frequency to be converted to above-mentioned second frequency by above-mentioned first frequency.
6. multiple sampling frequency approach as claimed in claim 4, wherein above-mentioned sampling frequency is sequentially selected as above-mentioned working sampling frequency respectively.
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| CN106814924B (en) * | 2015-11-27 | 2020-08-21 | 原相科技股份有限公司 | Signal sampling method and sensing system |
| CN111541451B (en) * | 2020-06-23 | 2021-10-29 | 深圳比特微电子科技有限公司 | Method and clock circuit for up-converting a clock signal |
| CN115267327B (en) * | 2022-07-25 | 2023-04-11 | 青岛艾诺智能仪器有限公司 | Harmonic wave measuring device and method for synchronous tracking |
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| EP0818751A1 (en) * | 1996-07-12 | 1998-01-14 | Synaptics, Incorporated | Object position detector with noise suppression feature |
| US6124848A (en) * | 1997-08-01 | 2000-09-26 | Lsi Logic Corporation | Method and apparatus for reducing flat panel display horizontal scan signal interference in the electrostatic pen operated digitizer |
| CN201489451U (en) * | 2009-07-14 | 2010-05-26 | 融汇通网络服务有限公司 | Computer device |
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| US7852325B2 (en) * | 2007-01-05 | 2010-12-14 | Apple Inc. | RF pulse synchronization for data acquisition operations |
| US8493331B2 (en) * | 2007-06-13 | 2013-07-23 | Apple Inc. | Touch detection using multiple simultaneous frequencies |
| CN101594225B (en) * | 2008-05-30 | 2012-09-05 | 晨星软件研发(深圳)有限公司 | Synchronous receiving circuit and method |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0818751A1 (en) * | 1996-07-12 | 1998-01-14 | Synaptics, Incorporated | Object position detector with noise suppression feature |
| US6124848A (en) * | 1997-08-01 | 2000-09-26 | Lsi Logic Corporation | Method and apparatus for reducing flat panel display horizontal scan signal interference in the electrostatic pen operated digitizer |
| CN201489451U (en) * | 2009-07-14 | 2010-05-26 | 融汇通网络服务有限公司 | Computer device |
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