CN1815424A

CN1815424A - Dynamic correcting method for touch coutrol panel

Info

Publication number: CN1815424A
Application number: CNA2005100331541A
Authority: CN
Inventors: 黄光照
Original assignee: LG Electronics Huizhou Co Ltd
Current assignee: LG Electronics Huizhou Co Ltd
Priority date: 2005-02-02
Filing date: 2005-02-02
Publication date: 2006-08-09

Abstract

The method includes three steps: dividing all faceplate into zones according to stated size; checking whether input point is generated in the divided zones in sequence; if yes, carrying out accurate scanning for the relevant zone so as to calculate out coordinate value of the relevant input point. Advantages are: reducing power consumption; accuracy of coordinate value for touch control faceplate in large type raised to the accuracy same as the touch control faceplate in small type.

Description

The dynamic calibration method of contact panel

(1) technical field

The invention relates to the technology of dynamic calibration (Dynamic Calibration), especially about the dynamic calibration method of a kind of contact panel (Touch Panel).

(2) background technology

At present, equipment such as PC or portable terminal computer utilize keyboard (Key Board), mouse (Mouse), digital quantizer various input medias (Input Device) such as (Digitizer) usually, carry out text and diagram and handle.

Contact panel (Touch Panel) is current representative input media, and it is simple in structure, and maloperation is few, and is not having still to carry out the literal input under the situation of extra input equipment.

At present, contact panel has: resistance-type (resistive), condenser type (capacitive), acoustic wave, optics (ultraviolet ray) formula, electromagnetic type etc.

Particularly, electric resistance touch-control panel is to use resistance to make, what adopt is to cut apart the analog form of recently obtaining user's position contacting coordinate by current ratio that flows to resistance or voltage, and common this mode is more favourable than alternate manner at aspects such as slim, small-sized, light-type and low power consumptions.

So, electric resistance touch-control panel is installed in the display screen front end of LCD LCD (Liquid Crystal Display) or leonard's tube, the user sees on the limit that the display screen limit pushes above the display screen, can carry out various operations, so electronic memo, PDA (personal digital assistant), portable PC input equipments such as (PC) have obtained extensively popularizing.

Having as above, a side group plate of the electric resistance touch-control panel information input side of characteristics is provided with transparent flexible film substrate, the opposite side substrate is provided with the formulated transparent lightweight substrate of glass, article 2, the subtend face of transparency carrier is provided with resistance, forms upper/lower electrode with this.Wiring mode according to electrode can be divided into four-wire type, five-line, eight line formulas again.

The function of this electric resistance touch-control panel is: whole conducting electric currents on the x of 2 panels that are close together up and down, y direction of principal axis, simultaneously as shown in Figure 1, according to the strength of externally pushing with pen or hand, detect the specified point voltage (Vx1, Vx2, Vy1, Vy2) up and down that is produced with the contact panel contact, produce digital the variation with this, and calculate the ratio (Vx1, Vx2) (Vy1, Vy2) of this number value, draw the two-dimensional coordinate value of reference point.

Promptly, prior art is: make the whole contact panels of certain current direction, scan all panels, under the situation that produces input point, obtain voltage ratio (Vx1, Vx2) (Vy1, Vy2) according to the resistance change between resistive element and lead-out terminal, thereby calculate the coordinate figure of relevant input point.

But, because the mode that adopts is the mode that makes the whole contact panels of current direction and calculate the input point coordinate figure at present, therefore, if the size of contact panel is big, the line of contact panel current lead-through must be correspondingly increased, the problem that current drain increases can be produced like this.

But when the size of contact panel was big, contact panel its resolution (resolution) little compared with size reduced usually, and the accuracy of input point coordinate figure also will reduce thereupon.

So, use the equipment of the intelligent display (smart display) of large-scale contact panel or radio monitor (wireless monitor) and so on, also need to improve calibration accuracy as the equipment that uses the such small size panel of PDA.

(3) summary of the invention

Therefore, the present invention puts forward for solving above-mentioned existing issue, purpose is to provide a kind of dynamic calibration method of contact panel, promptly, whole panels are divided into the regulation zone, and scan these divided zones in order, confirm whether to produce input simultaneously, precision sweep is carried out in the relevant range that produces input, calculate the dynamic calibration method of the contact panel of relevant input point coordinate figure with this.

To achieve these goals, the dynamic calibration method of contact panel of the present invention is at the touch control panel coordinate detection method, divide following three steps: provide electric current to a part of electrode of the X-direction of whole panels and a part of electrode of Y direction, be divided into the step in the zone of prescribed level; Check that in order the above-mentioned zone of having cut apart has or not the step that produces input point; If above-mentioned input point produces, then carry out precision sweep, calculate the step of relevant input point coordinate figure with this.

Effect of the present invention:

In sum, the dynamic calibration method effect of contact panel of the present invention is: whole panels are cut apart, detected each regulation zone and have or not input point to produce.Thereby, compared with prior art, not only can reduce power consumption, and large-scale contact panel also can equally improve the accuracy of coordinate figure with small-sized contact panel.

For further specifying above-mentioned purpose of the present invention, design feature and effect, the present invention is described in detail below with reference to accompanying drawing.

(4) description of drawings

Fig. 1 is the exemplary plot of existing coordinate figure account form.

Fig. 2 is the exemplary plot of the coordinate figure account form of the embodiment of the invention.

Fig. 3 is the operation flow sheet of embodiment of the invention displaing coordinate value computation process.

(5) embodiment

Dynamic calibration method to contact panel of the present invention is elaborated below with reference to accompanying drawings.

Fig. 2 is the exemplary plot that the embodiment of the invention shows the dynamic calibration zone, and Fig. 3 is the operation flow sheet that the embodiment of the invention shows the dynamic calibration process.

Therefore, with reference to Fig. 2 and Fig. 3 the operation and the effect of the embodiment of the invention are described below.

At first, the embodiment of the invention is divided into whole panels in the zone of prescribed level.

Fig. 2 has shown the situation with whole panel quarterns, can also whole panels be divided into the zone of prescribed level as required with eight equal parts, the forms of grading such as 16.

After this, the regional conducting electric current to respectively cutting apart confirms to have or not the generation magnitude of voltage to change according to input point on the lead-out terminal of relevant range simultaneously in order, checks with this to have or not input point to produce.

That is, as shown in Figure 3: the axial electrode of whole panel x is divided into (Grouping) regulation number, the axial electrode of y also is divided into the regulation number, be divided into a regulation zone; And, check that with this input point has or not generation in order to axial electrode of the x of each cut zone and the axial electrode conduction electric current of y; Judge to have then not produce input point,, continue to check in order that each cut zone has or not input point to produce if do not produce input point; If the generation input point is carried out precision sweep to relevant infringement zone, calculate the coordinate figure of input point.

Input point is not positioned on the point on the panel, and a bit being arbitrarily that benchmark is distributed on certain zone in the predetermined radius.And, not to whole electrode conduction electric currents of relevant cut zone, but whole dividing electrodes of the cut zone of being correlated with can be become regulation, the conducting electric current checks that input point has or not generation in order.

Therefore, when when cut zone shown in Figure 2 is confirmed to have produced input point, whole conducting electric currents on the x of 2 panels that are close together up and down of relevant cut zone, y direction of principal axis then, and according to the strength of externally pushing with pen or hand, detect the voltage up and down (Vx1, Vx2) (Vy1, Vy2) that contacts the specified point that is produced with contact panel, carrying out number with this changes, and calculate the ratio of these digital values (Vx1, Vx2) (Vy1, Vy2), draw the two-dimensional coordinate value of reference point.

That is, the present invention is not the institute wired (Line) of the whole panels of scanning, but widens scanning (Scan) at interval, just the zone of each prescribed level that whole panels are cut apart is scanned, and affirmation simultaneously has or not the generation input point.Then, produced input point, then measured voltage, recently calculated coordinate figure according to this voltage from relevant therewith whole electrodes if detect cut zone shown in Figure 2.

Those of ordinary skill in the art will be appreciated that, above embodiment is used for illustrating the present invention, and be not to be used as limitation of the invention, as long as in connotation scope of the present invention, all will drop in the scope of claims of the present invention variation, the modification of the above embodiment.

Claims

1, a kind of dynamic calibration method of contact panel is at the touch control panel coordinate detection method, it is characterized in that comprising following three steps:

Whole panels are divided into the step in the zone of prescribed level;

Check that in order above-mentioned divided zone has or not the step that produces input point;

Produce if confirm above-mentioned input point, then precision sweep is carried out in the relevant range, thereby calculate the step of relevant input point coordinate figure.

2, the dynamic calibration method of contact panel as claimed in claim 1 is characterized in that described Region Segmentation step comprises two processes:

The axial electrode of x is divided into the regulation number, the axial electrode of y also is divided into the process of regulation number;

Only provide electric current to cut apart the process of relevant range to axial a part of electrode of the above-mentioned x that is grouped and the axial a part of electrode of y.