CN102236450B - Scanning method of the touch panel - Google Patents

Abstract

Translated fromChinese

本发明提出一种触碰面板的扫描方法，上述触碰面板具有一水平通道组与一垂直通道组，其分别具有多条水平通道与多条垂直通道。此扫描方法会同时扫描N条通道，其中上述N条通道选自水平通道组或垂直通道组，N为正整数且小于所选择的通道组中的通道总数。藉此，可加速扫描速度与提高感测的准确性。

The present invention provides a scanning method for a touch panel, wherein the touch panel has a horizontal channel group and a vertical channel group, each of which has a plurality of horizontal channels and a plurality of vertical channels. The scanning method simultaneously scans N channels, wherein the N channels are selected from the horizontal channel group or the vertical channel group, and N is a positive integer and is less than the total number of channels in the selected channel group. In this way, the scanning speed can be accelerated and the accuracy of sensing can be improved.

Description

The scan method of contact surface plate

Technical field

The invention relates to a kind of scan method of contact surface plate, and particularly relevant for a kind of scan method that has sweep velocity and sensing accuracy concurrently.

Background technology

Along with the technical development of contact surface plate, contact surface plate has been widely used in the screen of electronic installation, for example mobile phone, mobile computer or flat computer.Contact surface plate can allow user input more easily or operate, and makes its user interface humanized and convenient.Multipoint mode contact surface plate has become the main flow of contact surface plate at present, comprises that the windowing software of apple computer, Microsoft has all been released relevant product.Due to the support of large-scale company, more promoted the range of application of contact surface plate, purposes such as portable communications equipment, office automation equipment, health care, finance/business, industry or electronic game.

Common contact surface plate is mainly divided into two kinds at present, resistance type touch panel (resistive touch panel) and capacitor-type touch panel (capacitive touch panel).Resistance type touch panel is mainly used in single-point type contact surface plate, and its cost is comparatively cheap, and capacitor-type touch panel can be applicable to, in multipoint mode contact surface plate, to have the function of multi-point touch.

The sensor chip of multipoint mode contact surface plate can utilize a plurality of analog-digital converters that signal is converted to digital signal to carry out interpretation for back-end circuit conventionally.Along with contact surface plate size strengthens, its port number and passage length also can increase, and this can cause the difficulty and the accuracy that affects sensing of configuration.

Summary of the invention

The present invention proposes a kind of scan method of contact surface plate, has accelerated scan speed and the effect that improves sensing accuracy, and can come according to this scan method configuration mode and its channel layout mode of Optimized Simulated digital quantizer.

The present invention proposes a kind of scan method of contact surface plate, this contact surface plate has a horizontal channel group and a vertical channel group, this horizontal channel group has many horizontal channels, this vertical channel group has many vertical channels, this scan method comprises: according to the non-conterminous mode of the passage scanning in the same scan period, sequentially scan according to a default scanning sequency all passages in first passage group are scanned, the passage scanning in the same scan period is non-conterminous; And after all passages in this first passage group of scanning, sequentially scan according to the non-conterminous mode of the passage scanning in the same scan period, according to another default scanning sequency, all passages in second channel group are scanned, the passage scanning in the same scan period is non-conterminous, wherein, if this first passage group is this horizontal channel group, this second channel group is this vertical channel group; If this first passage group is this vertical channel group, this second channel group is this horizontal channel group.。

In an embodiment of the present invention, this default scanning sequency all passages in first passage group being scanned is first to scan even-numbered channels to scan odd chanel again or first scan odd chanel and scan even-numbered channels again.

In an embodiment of the present invention, this another the default scanning sequency all passages in second group being scanned is first to scan even-numbered channels to scan odd chanel again or first scan odd chanel and scan even-numbered channels again.

In an embodiment of the present invention, the analog-digital converter of respective amount can be connected to respectively corresponding above-mentioned many horizontal channels and above-mentioned many vertical channels according to a default scanning sequency, and sequentially scans in the step of all passages in this first passage group and also comprise: the analog-digital converter with this respective amount scans this all passages respectively.

Based on above-mentioned, the present invention utilizes a plurality of analog-digital converters to scan many non-conterminous passages simultaneously, has accelerated scan speed and the effect that improves sensing accuracy.

For above-mentioned feature and advantage of the present invention can be become apparent, special embodiment below, and coordinate accompanying drawing to be described in detail below.

Accompanying drawing explanation

Fig. 1 is the contact surface plate schematic diagram according to first embodiment of the invention.

Fig. 2 and Fig. 3 are the analog-digital converter 122～128 and pin CH1～CH24 annexation figure according to first embodiment of the invention.

Fig. 4 is the scan method process flow diagram according to the contact surface plate of second embodiment of the invention.

[main element symbol description]

110: contact surface plate

X1～X12: horizontal channel

Y1～Y12: vertical channel

120: sensing cell

122～128: analog-digital converter

CH1～CH24: pin

ADC1-1～ADC4-6: the pin of analog-digital converter

S405～S450: step

Embodiment

the first embodiment

Please refer to Fig. 1, Fig. 1 is the contact surface plate schematic diagram according to first embodiment of the invention, on contact surface plate 110, there is many horizontal channel X1～X12 and vertical channel Y1～Y12, horizontal channel X1～X12 is positioned at a side of contact surface plate 110, form horizontal channel group, and vertical channel Y1～Y12 is positioned at the opposite side of contact surface plate 110, form vertical channel group.Sensing cell 120 is respectively coupled to horizontal channel X1～X12 and the vertical channel Y1～Y12 of contact surface plate 110 via pin (Pin) CH1～CH24.Sensing cell 120 can detect the touch position on panel via horizontal scan passage X1～X12 and vertical channel Y1～Y12.In sensing cell 120, have a plurality of analog-digital converters 122～128, it is configurable on printed circuit board (PCB) and be connected to horizontal channel X1～X12 and vertical channel Y1～Y12 touches signal with sensing.On contact surface plate 110, have a plurality of sensing elements (for example capacitance sensing element), with array way, be disposed in panel, wherein horizontal channel X1～X12 and vertical channel Y1～Y12 are electrically connected to those sensing elements to export its touching signal.

In the present embodiment, the layout cabling that pin CH1～CH24 is connected to horizontal channel X1～X12 and vertical channel Y1～Y12 can not intert, and as shown in Figure 1, so just can not affect the accuracy of sensing.Each analog-digital converter 122～128 has 6 sensing pins (not illustrating), can be connected to 6 passages.Analog-digital converter 122～128 can be connected to respectively pin CH1～CH24 to be connected to corresponding horizontal channel X1～X12 and vertical channel Y1～Y12 according to a default scanning sequency.Annexation between the sensing pin of analog-digital converter 122～128 and pin CH1～CH24 please refer to Fig. 2 and Fig. 3, and Fig. 2 and Fig. 3 are the analog-digital converter 122～128 and pin CH1～CH24 annexation figure according to first embodiment of the invention.The sensing pin of analog-digital converter 122～128 represents with ADC1-1～ADC1-6, ADC2-1～ADC2-6, ADC3-1～ADC3-6 and ADC4-1～ADC4-6 respectively.Take pin CH1～CH4 as example, and it is connected to respectively first sensing pin in analog-digital converter 122～128, i.e. ADC1-1, ADC2-1, ADC3-1, ADC4-1.Other analog-digital converter 122～128 please refer to Fig. 2 with pin CH1～CH24 annexation figure, at this, is not repeated.Fig. 3 illustrates the annexation of analog-digital converter 122～128 out of the ordinary and pin CH1～CH24.

Configuration mode by means of above-mentioned Fig. 2 and Fig. 3, sensing cell 120 can carry out horizontal channel X1～X12 and the vertical channel Y1～Y12 in sensing contact surface plate 110 with analog-digital converter 122～128 simultaneously, and all passages that sequentially scan whole contact surface plate 110 are with detecting touch position.

Next, further illustrate the method with analog-digital converter 122～128 scanning contact surface plates 110.In scanning process, simultaneously activation of analog-digital converter 122～128 is with 4 passages of while sensing, but these 4 passages must be positioned at the same side (being horizontal channel X1～X12 or vertical channel Y1～Y12) of contact surface plate 110 and non-conterminous mutually.The first horizontal scan passage X1～X12 of take is example, analog-digital converter 122～128 can first scan even-numbered channels (being horizontal channel X2, X4, X6, X8), then in the next scan period, scan odd chanel (being horizontal channel X1, X3, X5, X7), vice versa again.After two scan periods, horizontal channel X1～X8 can be scanned like this, and in the same scan period, the horizontal channel that analog-digital converter 122～128 scans is non-conterminous.Because the horizontal channel being scanned is non-conterminous, so can increase the accuracy of sensing result, avoid the action phase mutual interference of scanning in same period.

From the above, analog-digital converter 122～128 must meet following two conditions when scanning contact surface plate 110:

(1) passage scanning in the same scan period is necessary for the passage of same group (horizontal channel group or vertical channel group), for example, be all horizontal channel or be all vertical channel.Passage on the same group can not carry out sensing simultaneously.

(2) passage scanning in the same scan period is non-conterminous.

In other words, when sensing cell 120 has N analog-digital converter, sensing cell 120 can utilize N analog-digital converter with a while sensing N passage, but this N passage must be all horizontal channel or be all vertical channel, and this N passage is non-conterminous mutually each other, N is positive integer and is less than horizontal channel or vertical logical sum.So-called non-conterminous passage is for example even-numbered channels or odd chanel, but the present embodiment is not limited to this.Sensing cell 120 can carry out sensing to jump the different modes of choosing such as number (as 2,5,7,11) according to design requirement, as long as institute's scan channel is non-conterminous simultaneously.According to all horizontal channel X1～X12 of above-mentioned scan mode sensing and vertical channel Y1～Y12, can increase the accuracy of sensing.

In addition,, although it should be noted that it is example explanation that the present embodiment be take 122～128,12 horizontal channel X1～X12 of four analog-digital converters and 12 vertical channel Y1～Y12, the present invention is not as limit.After via of the present invention disclosing, those skilled in the art should know other embodiment easily by inference, at this, do not add tired stating.

the second embodiment

In the above-described embodiments, after the passage of sensing cell 120 in can first horizontal scan passage group, and then the passage in scanning vertical channel group, in another embodiment of the present invention, sensing cell 120 also can first scan after the passage in vertical channel group, and then the passage in horizontal scan passage group.Next, referring to Fig. 4, Fig. 4 is the scan method process flow diagram according to the contact surface plate of second embodiment of the invention.First, determine the scanning sequency (step S405) of horizontal channel group and vertical channel group, the first passage group that then judgement first scans is horizontal channel group or vertical channel group (step S410).If selection level passage group is first passage group, first all horizontal channel X1～X12 (step S420) in horizontal scan passage group sequentially, and then sequentially scan all vertical channel Y1～Y12 (step S430) in vertical channel group.Otherwise, if select vertical channel group, be that first passage group first sequentially scans all vertical channel Y1～Y12 (step S440) in vertical channel group, and then all horizontal channel X1～X12 (step S450) in horizontal scan passage group sequentially.

Wherein, in above-mentioned steps S420～S450, sensing cell 120 can a plurality of passages of single pass, but the passage of scanning must be non-conterminous mutually simultaneously, for example even-numbered channels or odd chanel.The mode of scanning please refer to the explanation of above-mentioned Fig. 1～Fig. 3, and after via of the present invention disclosing, those skilled in the art should know its embodiment easily by inference, at this, does not add tired stating.

In sum, the present invention proposes the scan method of contact surface plate, and wherein horizontal channel and vertical channel can not scan simultaneously, and many passages of scanning are simultaneously non-conterminous mutually each other.By this, can increase the sweep velocity of contact surface plate and the accuracy of sensing.In addition, a plurality of analog-digital converters can configure and be connected to horizontal channel and vertical channel to scan (sensing) many passages simultaneously according to above-mentioned scan method is corresponding.

Although the present invention with embodiment openly as above; but it is not in order to limit the present invention; any one of ordinary skill in the art; without departing from the spirit and scope of the present invention; should make a little change and modification, therefore protection scope of the present invention should be as the criterion depending on the claims person of defining.

Claims (4)

1. a scan method for contact surface plate, this contact surface plate has a horizontal channel group and a vertical channel group, and this horizontal channel group has many horizontal channels, and this vertical channel group has many vertical channels, and this scan method comprises:

According to the non-conterminous mode of the passage scanning in the same scan period, according to a default scanning sequency, all passages in first passage group are scanned; And

After all passages in this first passage group of scanning, according to the non-conterminous mode of the passage scanning in the same scan period, according to another default scanning sequency, all passages in second channel group are scanned,

Wherein, if this first passage group is this horizontal channel group, this second channel group is this vertical channel group; If this first passage group is this vertical channel group, this second channel group is this horizontal channel group.

2. the scan method of contact surface plate as claimed in claim 1, this default the scanning sequency wherein all passages in first passage group being scanned is first to scan even-numbered channels to scan odd chanel again or first scan odd chanel and scan even-numbered channels again.

3. the scan method of contact surface plate as claimed in claim 1, this another the default the scanning sequency wherein all passages in second channel group being scanned is first to scan even-numbered channels to scan odd chanel again or first scan odd chanel and scan even-numbered channels again.

4. the scan method of contact surface plate as claimed in claim 1, wherein the analog-digital converter of respective amount is connected to respectively corresponding described many horizontal channels and described many vertical channels according to a default scanning sequency, and also comprises in the step all passages in this first passage group being scanned according to a predetermined scanning sequency: the analog-digital converter with this respective amount scans this all passages respectively.

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