CN1484194A - Panel sensor and location point search method thereof - Google Patents
Panel sensor and location point search method thereof Download PDFInfo
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- CN1484194A CN1484194A CNA021429324A CN02142932A CN1484194A CN 1484194 A CN1484194 A CN 1484194A CN A021429324 A CNA021429324 A CN A021429324A CN 02142932 A CN02142932 A CN 02142932A CN 1484194 A CN1484194 A CN 1484194A
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Abstract
The invention relates to a kind of panel sensing device and the location searching method. It mainly uses a control unit to provide at leas a reference voltage and at least a phase reversal reference voltage, in order to defines plural position districts through the distribution of electric field generated by reference voltage on the sensing panel, and uses a sensing pen to touch the sensing board to sense the voltage, in order to search touching point according to the target voltage and the phase of the reference voltage.
Description
Technical field
The present invention relates to a kind of panel sensing apparatus and anchor point method for searching thereof, refer to a kind of especially with the panel sensing apparatus and the anchor point method for searching thereof of phase differential as the foundation of judging the position.
Background technology
General e-book has a sensing pen and a plurality of sensing page, and this sensing pen is used for touching these sensing pages, to carry out a selection operation.Fig. 1 shows the synoptic diagram of the sensing panel of the known electric philosophical works 11, and wherein A1 and B1 two ends are to send into drive waveforms respectively, with the column position (row) of obtaining sensing pen 12; Drive waveforms is also sent at C1 and D1 two ends respectively, with the line position (col) of obtaining this sensing pen 12.
Fig. 2 shows A1, B1, C1, reaches the drive waveforms that D1 four ends are imported respectively.At the beginning (for example: the 10-20 microsecond), A1, B1, C1, and DI four ends send into identical reference voltage waveform, then import an addressing voltage waveform (row) in the A1 end at 6-9 during second, so that the mode that induction pen 12 sees through electric field induction senses an electric field intensity waveform, as shown in Figure 3.
The linearity that is distributed as owing to electric field intensity, so can come the voltage that on the reference voltage waveform time (for example: 0-3 second), obtains according to sending into the voltage of addressing voltage waveform time (for example: 6-9 second), to judge sensing pen 12 present positions in institute's survey time on the sensing pen 12.
Yet sensing pen 12 judges that the power of voltage amplitudes need see through a high-precision Analogue-to-digital Converter (ADC) (ADC) and judge, if when needing accurate Xie Suodu, needs higher bit and more accurate ADC, makes volume production with high costs.The amplitude or the energy that detect voltage induced in addition and produced, precision and specification are not easy control when a large amount of production.
Therefore, the inventor urgently thinks a kind of " the panel sensing apparatus and anchor point method for searching thereof " that can address the above problem in line with the spirit of actively inventing, and several times research experiment is finished this good common people's of suffering from invention finally.
Summary of the invention
Fundamental purpose of the present invention is that a kind of panel sensing apparatus and anchor point method for searching thereof are being provided, and is to utilize phase differential as the foundation of judging the position, and need use extra high precision Analogue-to-digital Converter (ADC) (ADC).
Another object of the present invention is that a kind of panel sensing apparatus and anchor point method for searching thereof are being provided, so that can utilize simple numerical digit analogy converter to promote Xie Suodu.
Another purpose of the present invention is that a kind of panel sensing apparatus and anchor point method for searching thereof are being provided, so that it is simple to reach external circuit, and the volume production quality is controlled easily.
According to a characteristic of the present invention, panel sensing apparatus proposed by the invention mainly comprises: a tablet, and it has one first end, second end corresponding to first end, one the 3rd end, reaches the 4th end corresponding to the 3rd end; One control module, be that the first, second, third and the 4th reference voltage to first, second, third and the 4th end that can adjust accurate position is provided respectively, wherein, first reference voltage and second reference voltage have opposite phases, the 3rd reference voltage and the 4th reference voltage have opposite phases, so as by first to fourth reference voltage on tablet Electric Field Distribution and define a plurality of positions block; And a sensing pen, in order to the touching tablet, and sensing is at the target voltage of the touch position of sensing pen, so as by control module according to target voltage and first to fourth reference voltage phase place search touch position with accurate.
Described panel sensing apparatus, wherein, the Electric Field Distribution of this first and second reference voltage defines first and second corresponding position block respectively on tablet, the Electric Field Distribution of the 3rd and the 4th reference voltage defines the 3rd and the 4th corresponding position block respectively on tablet.
Described panel sensing apparatus, wherein, this control module is that the phase place with the phase place of this target voltage and this first to fourth voltage compares, to judge the position block at this touch position place, and change defined position block by the accurate position of adjusting at least one voltage, the phase place of the phase place of comparison object voltage and this first to fourth voltage is oriented this touch position to continue to judge the position block at this touch position place again.
Described panel sensing apparatus, wherein this control module more comprises one numerical digit/analogy D/A converter, is converted to the reference voltage of analogy with the magnitude of voltage with numerical digit.
Described panel sensing apparatus, wherein this D/A converter is the D/A converter for 7 bits, so that the resolution on 128 rank to be provided.
According to another characteristic of the present invention, anchor point method for searching proposed by the invention is to search the touch position that a sensing style of writing is pressed on a tablet, tablet has one first end, one second end corresponding to first end, one the 3rd end, and the 4th end corresponding to the 3rd end, this method comprises the steps: mainly that (A) provides respectively and can adjust first of accurate position, second, the the 3rd and the 4th reference voltage to this first, second, the the 3rd and the 4th end, wherein, first reference voltage and second reference voltage have opposite phases, the 3rd reference voltage and the 4th reference voltage have opposite phases, so that the Electric Field Distribution by first and second reference voltage defines first and second corresponding position block respectively on tablet, and on tablet, define the 3rd and the 4th corresponding position block respectively by the Electric Field Distribution of the 3rd and the 4th reference voltage; (B) bump tablet with a sensing style of writing, and sensing is at the target voltage of the touch position of this sensing pen; (C) phase place of target voltage and the phase place of first to fourth voltage are compared, to judge the position block at this touch position place; (D) adjust the accurate position of at least one voltage in first to fourth voltage, and change defined position block; And (E) phase place of the phase place of comparison object voltage and first to fourth voltage again, judge the position block at touch position place and orient this touch position continuing.
The present invention constructs novelty, can provide on the industry to utilize, and truly have the advantage of promoting effect.
Description of drawings
Fig. 1 is the synoptic diagram of the known electric philosophical works;
Fig. 2 is the synoptic diagram of the input drive waveforms of known electric philosophical works sensing;
Fig. 3 is the sense waveform synoptic diagram of the known electric philosophical works;
Fig. 4 is the synoptic diagram of panel sensing apparatus of the present invention;
Fig. 5 is the embodiments of the invention synoptic diagram;
Fig. 6 is an action flow chart of the present invention.
Embodiment
Relevant preferred embodiment of the present invention, please be with reference to the synoptic diagram of Fig. 4 demonstration, its mainly by tablet 2, sensing pen 3, and control module 4 formed, wherein control module 4 more comprises a digital to analog converter (D/A) 41, in present embodiment, this digital to analog converter 41 is preferably has 7 bits, so that the resolution on 128 rank to be provided.Sensing pen 3 is to see through filter unit, shaping unit and signal amplifying unit (figure does not show) earlier to be connected with control module 4, so that handle for the voltage of 3 sensings of 4 pairs of sensing pens of control module.
Above-mentioned tablet 2 has four end A2, B2, C2, reaches D2, and wherein, the A2 end is corresponding with the B2 end, and the C2 end is corresponding with the D2 end.4 of control modules provide reference voltage to A2, B2, C2, and four ends such as D2 respectively.
Wherein, it is identical and phase place is opposite to input to the amplitude of A2 end and the reference voltage of B2 end, input to C2 end and D2 end-reference voltage also has opposite phases, so that supply to utilize the phase differential of these reference voltages to be used as the basis for estimation of local range search.
Next, will be that example is illustrated with the position (row) of addressing row.
Please be with reference to Fig. 5 and Fig. 6, control module 4 provides A2, and to hold an amplitude be 0 to 5V positive phase reference voltage, providing B2 to hold an amplitude is 5 to 0V minus phase reference voltage (step S601), and set the loop number of the accurate position of reference voltage of repeating to adjust A2 end or B2 end according to the precision of e-book and employed search algorithm method, so that for the location touch position.In the present embodiment, the precision of e-book is 128 bits, and the search algorithm method that is adopted is the binary search method, and then the loop number of She Dinging is seven times (step S602).With the alpha position place of sensing pen 3 these tablets 2 of touching, to be sensed in the target voltage of alpha position, for example, target voltage is that an amplitude is the positive phase voltage (step S603) of 3V again.
Then, the phase place of target voltage and the phase place of A2 end and B2 end are compared, hold still B2 end with the touch position of judging sensing pen 3 near A2, in present embodiment, the phase place of target voltage is identical with the reference voltage phase place of A2 end, is the first half block (step S604) near the A2 end so judge the touch position of sensing pen 3.Because the touch position of sensing pen 3 is near the A2 end, therefore see through control module 4 and adjust the reference voltage position standard of A2 end, make that the reference voltage of A2 end is the positive phase reference voltage of amplitude 2.5 to 5V, and with loop number successively decrease (step S605), so that when the loop number is not equal to zero, repeated execution of steps S603, step S604, and step S605, for example: the phase place of target voltage and the phase place of adjusted A2 end and B2 end are compared, at this moment, the phase place of target voltage is identical with the phase place of A2 end, therefore the touch position (α) of judging sensing pen 3 drops in 3/4 to 1 the position block of tablet 2, and adjusts reference voltage and the loop number subtracts one.When the loop number equals zero, then orient touch position (column position, row address) (step S606).
For the position (col address) of addressed row, because suitable, so repeated description no longer with the process of aforementioned addressing column position.And the drop point method of above-mentioned search sensing pen 3 is mainly to utilize phase differential and binary search method to seek, but with panel sensing apparatus of the present invention, also can adopt other search algorithm methods to orient touch position.
By above explanation as can be known, the present invention mainly provides at least one reference voltage and at least one corresponding anti-phase reference voltage on tablet, and the phase place and the position of target voltage that sees through sensing style of writing time of bumping tablet institute's sensing is accurate, the phase place that the reference voltage that is provided is provided, to obtain the touch position of sensing pen, so that need not use extra high precision Analogue-to-digital Converter (ADC) (ADC), and can utilize simple numerical digit analogy converter to promote Xie Suodu, and it is simple to reach external circuit, and the volume production quality is controlled easily.
To sum up institute is old, and no matter the present invention all shows it be different from the feature of prior art with regard to purpose, means and effect, in fact is one to have the invention of practical value.
It should be noted that above-mentioned many embodiment give an example for convenience of explanation, the interest field that the present invention advocated should be as the criterion so that claim is described certainly, but not only limits to the foregoing description.
Claims (6)
1. a panel sensing apparatus is characterized in that, mainly comprises:
One tablet, it has one first end, second end corresponding to this first end, one the 3rd end, reaches the 4th end corresponding to the 3rd end;
One control module, be to provide the first, second, third and the 4th reference voltage that to adjust accurate position respectively to this first, second, third and the 4th end, wherein, this first reference voltage and second reference voltage have opposite phases, the 3rd reference voltage and the 4th reference voltage have opposite phases, so as by this first to fourth reference voltage on tablet Electric Field Distribution and define a plurality of positions block; And
One sensing pen, in order to touching this tablet, and sensing is at the target voltage of the touch position of this sensing pen so that by this control module according to this target voltage and this first to fourth reference voltage phase place search touch position with accurate position.
2. panel sensing apparatus as claimed in claim 1, it is characterized in that, wherein, the Electric Field Distribution of this first and second reference voltage defines first and second corresponding position block respectively on tablet, the Electric Field Distribution of the 3rd and the 4th reference voltage defines the 3rd and the 4th corresponding position block respectively on tablet.
3. panel sensing apparatus as claimed in claim 2, be characterised in that, wherein, this control module is that the phase place with the phase place of this target voltage and this first to fourth voltage compares, to judge the position block at this touch position place, and changing defined position block by the accurate position of adjusting at least one voltage, the phase place of the phase place of comparison object voltage and this first to fourth voltage again is with the position block that continues this touch position place of judgement and orient this touch position.
4. panel sensing apparatus as claimed in claim 1 is characterized in that, wherein this control module more comprises one numerical digit/analogy D/A converter, is converted to the reference voltage of analogy with the magnitude of voltage with numerical digit.
5. panel sensing apparatus as claimed in claim 4 is characterized in that, wherein this D/A converter is the D/A converter for 7 bits, so that the resolution on 128 rank to be provided.
6. anchor point method for searching, it is characterized in that, be on a tablet, to search the touch position that a sensing style of writing is pressed, this tablet has one first end, second end corresponding to this first end, one the 3rd end, reaches the 4th end corresponding to the 3rd end, and this method mainly comprises the steps:
(A) provide respectively can adjust accurate position the first, second, third and the 4th reference voltage to this first, second, third and the 4th end, wherein, this first reference voltage and second reference voltage have opposite phases, the 3rd reference voltage and the 4th reference voltage have opposite phases, so that the Electric Field Distribution by this first and second reference voltage defines first and second corresponding position block respectively on tablet, and on tablet, define the 3rd and the 4th corresponding position block respectively by the Electric Field Distribution of the 3rd and the 4th reference voltage;
(B) bump this tablet with a sensing style of writing, and sensing is at the target voltage of the touch position of this sensing pen;
(C) phase place of this target voltage and the phase place of this first to fourth voltage are compared, to judge the position block at this touch position place;
(D) adjust the accurate position of at least one voltage in first to fourth voltage, and change defined position block; And
(E) phase place of the phase place of this target voltage and this first to fourth voltage is relatively again judged the position block at this touch position place and is oriented this touch position continuing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02142932 CN1244882C (en) | 2002-09-16 | 2002-09-16 | Panel sensor and location point search method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02142932 CN1244882C (en) | 2002-09-16 | 2002-09-16 | Panel sensor and location point search method thereof |
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| Publication Number | Publication Date |
|---|---|
| CN1484194A true CN1484194A (en) | 2004-03-24 |
| CN1244882C CN1244882C (en) | 2006-03-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 02142932 Expired - Fee Related CN1244882C (en) | 2002-09-16 | 2002-09-16 | Panel sensor and location point search method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103219025A (en) * | 2012-01-18 | 2013-07-24 | 台均科技（深圳）有限公司 | Audio frequency recording method and device |
-
2002
- 2002-09-16 CN CN 02142932 patent/CN1244882C/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103219025A (en) * | 2012-01-18 | 2013-07-24 | 台均科技（深圳）有限公司 | Audio frequency recording method and device |
| CN103219025B (en) * | 2012-01-18 | 2020-03-06 | 台均科技（深圳）有限公司 | Audio recording method and device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1244882C (en) | 2006-03-08 |
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