CN104391603B - A kind of calibration method of touch screen, calibrating installation and calibration system - Google Patents
A kind of calibration method of touch screen, calibrating installation and calibration system Download PDFInfo
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- CN104391603B CN104391603B CN201410746380.3A CN201410746380A CN104391603B CN 104391603 B CN104391603 B CN 104391603B CN 201410746380 A CN201410746380 A CN 201410746380A CN 104391603 B CN104391603 B CN 104391603B
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- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/0416—Control or interface arrangements specially adapted for digitisers
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Abstract
The invention discloses a kind of calibration method of touch screen, calibrating installation and calibration system, the method includes：The first alignment mark on control calibrator unit is aligned with the second alignment mark of display on display panel, and the equivalent touch points check point position corresponding with the second alignment mark for making calibrator unit contact produced by contact panel is identical；Determine coordinate position of the equivalent touch points in contact panel coordinate system；The corresponding relation of contact panel coordinate system and display panel coordinates system is determined in the coordinate position of contact panel coordinate system in the coordinate position of display panel coordinates system and the equivalent touch points determined according to check point；According to the corresponding relation determined, exported after the coordinate position that touch-control occurs in contact panel coordinate system is calibrated.The first alignment mark and the method that is aligned of the second alignment mark provided using the present invention, it can be ensured that it is equivalent touch it is a little identical with check point position so that the calibration accuracy between display panel and contact panel is more accurate.
Description
Technical Field
The present invention relates to the field of display technologies, and in particular, to a calibration method, a calibration device, and a calibration system for a touch screen.
Background
With the rapid development of display technology, Touch Screen panels (Touch Screen panels) have gradually spread throughout the lives of people. Currently, a touch screen includes a touch panel and a display panel, and may be divided into: an add Mode Touch Panel (add Mode Touch Panel) and an In Cell Touch Panel (In Cell Touch Panel). The external hanging type touch screen is produced by separately producing a touch panel and a display panel and then attaching the touch panel and the display panel together; the in-cell touch panel embeds the touch electrodes of the touch panel inside the display panel.
Because the touch screen has mechanical errors and errors of amplification factors, corresponding points of graphs on the touch panel and the display panel have certain deviation, namely the touch panel and the display panel are in different plane coordinate systems, and the horizontal axis and the vertical axis of the coordinate system of the touch panel and the coordinate system of the display panel cannot be completely superposed, as shown in fig. 1a to 1c, after the external-hanging touch screen is assembled into a complete machine, relative displacement deviation and rotation deviation on the same plane may exist between the display panel 01 and the touch panel 02, and zooming deformation deviation caused by the fact that the display panel 01 and the touch panel 02 are not on the same horizontal plane, and after the embedded touch screen is assembled into the complete machine, relative displacement deviation on the same plane may also exist in the process of carrying out coordinate mapping. Therefore, in order to solve the above problems, the external touch screen or the internal touch screen needs to be calibrated after being assembled into a complete machine. Calibration is a graphic reconstruction process, i.e. the picture is transformed into a set of points consistent with the display panel by some transformation method. The existing calibration method mainly includes that an operator manually touches a certain calibration point on a display panel, capacitance at a touch point position generated by manual touch on a touch panel changes, and the calibration point and a coordinate point of the touch point position with the changed capacitance on the touch panel are analyzed, so that calibration between the display panel and the touch panel is realized.
Therefore, how to make the calibration precision between the display panel and the touch panel more accurate is a technical problem that needs to be solved urgently by those skilled in the art.
Disclosure of Invention
In view of this, embodiments of the present invention provide a calibration method, a calibration device, and a calibration system for a touch panel, which can ensure that equivalent touch points and calibration points are located at the same position, so that the calibration accuracy between a display panel and the touch panel is more accurate.
Therefore, an embodiment of the present invention provides a calibration method for a touch screen, including:
controlling a first alignment mark on a calibration component to align with a second alignment mark displayed on a display panel, so that an equivalent touch point generated by the calibration component contacting the touch panel is the same as a correction point corresponding to the second alignment mark;
determining the coordinate position of an equivalent touch point generated by the calibration component contacting the touch panel in the touch panel coordinate system;
determining a corresponding relation between the coordinate system of the touch panel and the coordinate system of the display panel according to the coordinate position of the correction point in the coordinate system of the display panel and the determined coordinate position of the equivalent touch point in the coordinate system of the touch panel;
and according to the determined corresponding relation, calibrating the coordinate position where touch control occurs in the coordinate system of the touch panel and outputting the calibrated coordinate position.
In a possible implementation manner, in the calibration method for a touch screen according to an embodiment of the present invention, before controlling the first alignment mark on the calibration component to align with the second alignment mark displayed on the display panel, the method includes: and controlling the display panel to display at least one second alignment mark.
In a possible implementation manner, in the calibration method for a touch panel according to an embodiment of the present invention, when the display panel is controlled to display a plurality of second alignment marks, controlling the first alignment mark on the calibration component to align with the second alignment mark displayed on the display panel specifically includes: controlling the first alignment marks on the calibration component to be sequentially aligned with a plurality of second alignment marks displayed on the display panel;
the determining the coordinate position of the equivalent touch point generated by the calibration component contacting the touch panel in the touch panel coordinate system specifically includes: determining coordinate positions of a plurality of equivalent touch points generated by the calibration component contacting the touch panel in a coordinate system of the touch panel respectively;
determining the corresponding relationship between the touch panel coordinate system and the display panel coordinate system according to the coordinate position of the correction point in the display panel coordinate system and the determined coordinate position of the equivalent touch point in the touch panel coordinate system specifically comprises: and determining the corresponding relation between the coordinate system of the touch panel and the coordinate system of the display panel according to the coordinate position of each correction point in the coordinate system of the display panel and the determined coordinate position of each equivalent touch point in the coordinate system of the touch panel.
In a possible implementation manner, in the calibration method for a touch screen provided in an embodiment of the present invention, determining a corresponding relationship between the touch panel coordinate system and the display panel coordinate system specifically includes:
according to the coordinate position (x, y) of each correction point in the display panel coordinate system and the determined coordinate position (x ', y') of each equivalent touch point in the touch panel coordinate system, calculating an included angle α between a horizontal axis of a projection coordinate system of the touch panel on the display panel and a horizontal axis of the display panel coordinate system, an included angle β between a vertical axis of the projection coordinate system of the touch panel on the display panel and a vertical axis of the display panel coordinate system, and a scaling coefficient k between a horizontal axis value of the touch panel coordinate system and a horizontal axis value corresponding to the projection coordinate system by adopting the following formulasxAnd a scaling coefficient k between a longitudinal axis value of the touch panel coordinate system and a longitudinal axis value corresponding to the projection coordinate systemyDetermining a corresponding relationship between the touch panel coordinate system and the display panel coordinate system:
wherein (x)0，y0) And the coordinate position of the origin of the projection coordinate system of the touch panel on the display panel in the coordinate system of the display panel is represented.
In a possible implementation manner, in the calibration method for a touch panel provided in an embodiment of the present invention, controlling the first alignment mark on the calibration component to align with the second alignment mark displayed on the display panel specifically includes: aligning a center point of the first alignment mark on the calibration member with a center point of the second alignment mark displayed on the display panel; wherein,
the center point of the second alignment mark is a corresponding correction point, and the center point of the first alignment mark is an equivalent touch point generated when the calibration component contacts the touch panel; or, the set value of the displacement from the center point of the second alignment mark to the set direction is a corresponding correction point, and the set value of the displacement from the center point of the first alignment mark to the set direction is an equivalent touch point generated by the calibration component contacting the touch panel.
The embodiment of the present invention further provides a calibration apparatus for a touch screen according to the above embodiments of the present invention, including:
the alignment control unit is used for controlling a first alignment mark on the calibration component to be aligned with a second alignment mark displayed on the display panel, so that an equivalent touch point generated by the calibration component contacting the touch panel is the same as a correction point corresponding to the second alignment mark in position;
the coordinate determination unit is used for determining the coordinate position of an equivalent touch point generated by the calibration component contacting the touch panel in the touch panel coordinate system;
the corresponding relation determining unit is used for determining the corresponding relation between the touch panel coordinate system and the display panel coordinate system according to the coordinate position of the correction point in the display panel coordinate system and the determined coordinate position of the equivalent touch point in the touch panel coordinate system;
and the calibration unit is used for calibrating the coordinate position where touch control occurs in the coordinate system of the touch panel according to the determined corresponding relation and then outputting the calibrated coordinate position.
In a possible implementation manner, the calibration apparatus for a touch screen provided in the embodiment of the present invention further includes: and the display control unit is used for controlling the display panel to display at least one second alignment mark.
In a possible implementation manner, in the calibration device for a touch screen according to an embodiment of the present invention, when the display control unit is specifically configured to control the display panel to display a plurality of second alignment marks, the alignment control unit is specifically configured to control the first alignment mark on the calibration component to be sequentially aligned with the plurality of second alignment marks displayed on the display panel;
the coordinate determination unit is specifically configured to determine coordinate positions of a plurality of equivalent touch points generated by the calibration component contacting the touch panel in the touch panel coordinate system respectively;
the corresponding relation determining unit is specifically configured to determine a corresponding relation between the touch panel coordinate system and the display panel coordinate system according to the coordinate position of each correction point in the display panel coordinate system and the determined coordinate position of each equivalent touch point in the touch panel coordinate system.
In a possible implementation manner, the correspondence determining unit is specifically configured to calculate, according to a coordinate position (x, y) of each correction point in the display panel coordinate system and a coordinate position (x ', y') of each determined equivalent touch point in the touch panel coordinate system, an included angle α between a horizontal axis of a projection coordinate system of the touch panel on the display panel and a horizontal axis of the display panel coordinate system, an included angle β between a vertical axis of the projection coordinate system of the touch panel on the display panel and a vertical axis of the display panel coordinate system, and a scaling coefficient k between a horizontal axis value of the touch panel coordinate system and a horizontal axis value corresponding to the projection coordinate system, by using the following formulaxAnd the longitudinal axis value and the position of the coordinate system of the touch panelThe scaling coefficient k between the longitudinal axis values corresponding to the projection coordinate systemyDetermining a corresponding relationship between the touch panel coordinate system and the display panel coordinate system:
wherein (x)0，y0) And the coordinate position of the origin of the projection coordinate system of the touch panel on the display panel in the coordinate system of the display panel is represented.
In a possible implementation manner, in the calibration device for a touch screen provided in an embodiment of the present invention, the alignment control unit is specifically configured to align a center point of the first alignment mark on the calibration component with a center point of the second alignment mark displayed on the display panel; wherein,
the center point of the second alignment mark is a corresponding correction point, and the center point of the first alignment mark is an equivalent touch point generated when the calibration component contacts the touch panel; or, the set value of the displacement from the center point of the second alignment mark to the set direction is a corresponding correction point, and the set value of the displacement from the center point of the first alignment mark to the set direction is an equivalent touch point generated by the calibration component contacting the touch panel.
The embodiment of the invention also provides a calibration system, which comprises a display panel which is provided with a touch panel and can display the second alignment mark, a calibration component which is provided with the first alignment mark, and the calibration device of the touch screen provided by the embodiment of the invention.
In a possible implementation manner, in the calibration system of the touch screen provided in the embodiment of the present invention, a contact surface between the calibration component and the touch panel is a circular ring or a circle.
The embodiment of the invention has the beneficial effects that:
the embodiment of the invention provides a calibration method, a calibration device and a calibration system of a touch screen, wherein the calibration method comprises the following steps: firstly, controlling a first alignment mark on a calibration component and a second alignment mark displayed on a display panel to align, so that an equivalent touch point generated by the calibration component contacting the touch panel is the same as a correction point corresponding to the second alignment mark; then determining the coordinate position of an equivalent touch point generated by the calibration component contacting the touch panel in a coordinate system of the touch panel; then determining the corresponding relation between the coordinate system of the touch panel and the coordinate system of the display panel according to the coordinate position of the correction point in the coordinate system of the display panel and the determined coordinate position of the equivalent touch point in the coordinate system of the touch panel; and finally, according to the determined corresponding relation, calibrating the coordinate position where touch control occurs in the coordinate system of the touch panel and outputting the calibrated coordinate position. Therefore, compared with the prior art, the method for performing alignment on the first alignment mark and the second alignment mark provided by the embodiment can ensure that the equivalent touch point and the correction point are the same in position, so that the calibration precision between the display panel and the touch panel is more accurate, and the method is convenient to apply to an automatic production process.
Drawings
Fig. 1a is a schematic diagram illustrating a relative displacement deviation between a display panel and a touch panel in a conventional touch screen;
FIG. 1b is a schematic view illustrating a rotational deviation between a display panel and a touch panel of a conventional touch screen;
FIG. 1c is a schematic diagram illustrating a distortion of a display panel and a touch panel in a conventional touch screen;
fig. 2 is a flowchart of a calibration method for a touch screen according to an embodiment of the present invention;
FIG. 3a is a schematic structural diagram of a first alignment mark on a calibration component according to an embodiment of the present invention;
fig. 3b is a schematic structural diagram of a second alignment mark displayed on the display panel according to the embodiment of the present invention;
fig. 4a to 4d are schematic diagrams of relative positions of a center point of a first alignment mark and an equivalent touch point generated by a calibration component contacting a touch panel, and a relative position of a center point of a second alignment mark and a corresponding calibration point, respectively, according to an embodiment of the present invention;
FIG. 5 is a schematic diagram illustrating coordinate transformation between a display panel coordinate system and a projection coordinate system according to an embodiment of the present invention;
fig. 6a and fig. 6b are schematic structural diagrams of a contact surface between a calibration component and a touch panel according to an embodiment of the invention.
Detailed Description
The following describes specific embodiments of a calibration method, a calibration device, and a calibration system for a touch screen according to embodiments of the present invention in detail with reference to the accompanying drawings.
The embodiment of the invention provides a calibration method of a touch screen, which specifically comprises the following steps as shown in fig. 2:
s101, controlling a first alignment mark on a calibration component and a second alignment mark displayed on a display panel to align, so that an equivalent touch point generated by the calibration component contacting the touch panel is the same as a correction point corresponding to the second alignment mark in position;
s102, determining the coordinate position of an equivalent touch point generated by the touch panel contacted by the calibration component in a coordinate system of the touch panel;
s103, determining a corresponding relation between a coordinate system of the touch panel and a coordinate system of the display panel according to the coordinate position of the correction point in the coordinate system of the display panel and the determined coordinate position of the equivalent touch point in the coordinate system of the touch panel;
and S104, according to the determined corresponding relation, calibrating the coordinate position where touch control occurs in the coordinate system of the touch panel and outputting the calibrated coordinate position.
In the calibration method for the touch screen provided in the embodiment of the present invention, first, the first alignment mark on the calibration component is controlled to align with the second alignment mark displayed on the display panel, so as to ensure that the equivalent touch point generated when the calibration component contacts the touch panel is the same as the calibration point corresponding to the second alignment mark; then, the coordinate position of the equivalent touch point generated by the touch panel contacted by the calibration component in the coordinate system of the touch panel is determined, then the corresponding relation between the coordinate system of the touch panel and the coordinate system of the display panel is determined according to the coordinate position of the calibration point in the coordinate system of the display panel and the determined coordinate position of the equivalent touch point in the coordinate system of the touch panel, and finally the coordinate position where touch control occurs in the coordinate system of the touch panel is calibrated and output according to the determined corresponding relation.
In general, in a specific implementation, in the calibration method for a touch panel according to an embodiment of the present invention, the step S101 of controlling the first alignment mark on the calibration component to align with the second alignment mark displayed on the display panel specifically includes: aligning a center point of a first alignment mark on the calibration component with a center point of a second alignment mark displayed on the display panel; wherein,
specifically, fig. 3a and 3B respectively show a schematic structural diagram of a first alignment mark a and a second alignment mark B, where the first alignment mark a may be a quadrilateral, or may be other regular or irregular shapes, and the shape may be any size, and similarly, the second alignment mark B may also be designed to be any shape and size, and is not limited herein;
as shown in fig. 4a and 4B, the center point of the first alignment mark a is an equivalent touch point 001 generated by the calibration component contacting the touch panel, and the center point of the second alignment mark B is a corresponding calibration point 002; alternatively, as shown in fig. 4c and 4d, the set value L of the displacement from the center point of the first alignment mark a to the set direction is the equivalent touch point 001 generated by the touch panel contacted by the calibration component, and the set value L of the displacement from the center point of the second alignment mark B to the set direction is the corresponding calibration point 002, which is not limited herein.
In a specific implementation, in the calibration method for a touch screen according to an embodiment of the present invention, in order to facilitate performing the alignment between the first alignment mark on the calibration component and the second alignment mark displayed on the display panel in step S101, before performing step S101, the method may further include: and controlling the display panel to display at least one second alignment mark.
In a specific implementation, in the calibration method for a touch panel according to an embodiment of the present invention, in order to improve the calibration accuracy between the display panel and the touch panel, a plurality of calibration points may be selected and a plurality of equivalent touch points may be obtained for performing a comprehensive analysis, and when the display panel is controlled to display a plurality of second alignment marks, the calibration method step S101 is used to control the first alignment mark on the calibration component to align with the second alignment mark displayed on the display panel, which may specifically include: controlling the first alignment marks on the calibration component to be sequentially aligned with a plurality of second alignment marks displayed on the display panel respectively so as to be touched for a plurality of times and achieve the aim of accurate calibration;
step S102 of determining a coordinate position of an equivalent touch point generated by the calibration component contacting the touch panel in the touch panel coordinate system may specifically include: determining coordinate positions of a plurality of equivalent touch points generated by the calibration component contacting the touch panel in a coordinate system of the touch panel;
step S103 determines a corresponding relationship between the touch panel coordinate system and the display panel coordinate system according to the coordinate position of the calibration point in the display panel coordinate system and the coordinate position of the determined equivalent touch point in the touch panel coordinate system, which may specifically include: the method comprises the steps of determining a corresponding relation between a touch panel coordinate system and a display panel coordinate system according to a coordinate position of each correction point in the display panel coordinate system and a determined coordinate position of each equivalent touch point in the touch panel coordinate system, specifically, only calibrating relative translation deviation between coordinates of the display panel and the touch panel on the same plane due to analysis on one correction point and one equivalent touch point, and comprehensively analyzing a plurality of correction points and a plurality of corresponding equivalent touch points to determine a corresponding relation between the touch panel coordinate system and the display panel coordinate system.
In a specific implementation, in the calibration method for a touch screen provided in the embodiment of the present invention, determining a corresponding relationship between a touch panel coordinate system and a display panel coordinate system may specifically include:
first, a formula of a corresponding relationship between a touch panel coordinate system and a display panel coordinate system can be obtained by the following method, as shown in fig. 5, xOy is a coordinate system of the display panel, x "O 'y" is a projection coordinate system of the touch panel on the display panel, and a horizontal axis and a vertical axis of x "O' y" are respectively l1And l2，l1And l2The parameter equations of (1) are respectively as follows:
wherein (x)0，y0) Indicating the coordinate position of the origin of the projected coordinate system of the touch panel on the display panel in the display panel coordinate system, α indicating the horizontal axis and the display of the projected coordinate system of the touch panel on the display panelThe angle between the horizontal axes of the panel coordinate system, β represents the angle between the vertical axis of the projection coordinate system of the touch panel on the display panel and the vertical axis of the display panel coordinate system.
Therefore, at any point M in the plane, the coordinate position of the coordinate system xOy on the display panel is (x, y), and the coordinate position of the projection coordinate system x "O' y" on the display panel is (x ", y"), as shown in fig. 5, the point M is actually a straight line l1Along a line l2After translation by a distance y ″)xAnd a straight line l2Along a line l1The intersection point of ly after translation by a distance x ″, i.e.
Two straight lines lxIntersect with ly, then there is, t1＝x″,t2Y ", then there are
The coordinate system xOy of the display panel is projected to the projection coordinate system x ' O ' y ' of the touch panel on the display panel, which has a certain scaling change, i.e. the coordinate system of the touch panel
Wherein k isxA scaling factor, k, between the horizontal axis value of the touch panel coordinate system and the horizontal axis value corresponding to the projection coordinate systemyAnd the scaling coefficient is expressed between the longitudinal axis value of the touch panel coordinate system and the longitudinal axis value corresponding to the projection coordinate system.
Therefore, the formula of the coordinate correspondence relationship between the display panel and the touch panel is as follows:
wherein (x)0，y0) And the coordinate position of the origin of the projection coordinate system of the touch panel on the display panel in the coordinate system of the display panel is represented.
There are various methods for obtaining the formula of the coordinate correspondence relationship between the display panel and the touch panel, and the method is not limited herein.
Calculating an included angle α between the horizontal axis of the projection coordinate system of the touch panel on the display panel and the horizontal axis of the display panel coordinate system, an included angle β between the vertical axis of the projection coordinate system of the touch panel on the display panel and the vertical axis of the display panel coordinate system, and a scaling coefficient k between the horizontal axis value of the touch panel coordinate system and the horizontal axis value corresponding to the projection coordinate system according to the coordinate position (x, y) of each correction point in the display panel coordinate system and the coordinate position (x ', y') of each determined equivalent touch point in the touch panel coordinate system by adopting the obtained formula of the coordinate correspondence relationship between the display panel and the touch panelxAnd a scaling coefficient k between a longitudinal axis value of the touch panel coordinate system and a longitudinal axis value corresponding to the projection coordinate systemyThe corresponding relation between the touch panel coordinate system and the display panel coordinate system can be determined.
In the following, a specific example is described in detail to illustrate that, in the calibration method for a touch screen according to an embodiment of the present invention, determining a corresponding relationship between a touch panel coordinate system and a display panel coordinate system includes the following steps:
assuming that the control display panel displays three second alignment marks, the first alignment marks on the control calibration component are sequentially aligned with the three second alignment marks displayed on the display panel, and when the coordinate position of the calibration point corresponding to the first second alignment mark in the display panel coordinate system is (3, 3), the coordinate position of the determined equivalent touch point in the touch panel coordinate system is (2, 2), that is, (x, y) ═ 3, and (x ', y') ═ 2, 2; when the coordinate position of the calibration point corresponding to the second alignment mark in the display panel coordinate system is (5, 5), the coordinate position of the determined equivalent touch point in the touch panel coordinate system is (4, 4), that is, (x, y) ═ 5, (x ', y') ═ 4, 4; when the coordinate position of the calibration point corresponding to the third second alignment mark in the display panel coordinate system is (7, 7), the coordinate position of the determined equivalent touch point in the touch panel coordinate system is (6, 6), that is, (x, y) ═ 7, (x ', y') ═ 6, and the data are respectively and sequentially substituted into the obtained formula of the coordinate correspondence relationship between the display panel and the touch panel, so as to obtain the following three sets of equations:
according to the above three sets of equations, the angle α between the horizontal axis of the projection coordinate system of the touch panel on the display panel and the horizontal axis of the display panel coordinate system is 30 °, the angle β between the vertical axis of the projection coordinate system of the touch panel on the display panel and the vertical axis of the display panel coordinate system is 60 °, and the scaling factor between the horizontal axis value of the touch panel coordinate system and the horizontal axis value corresponding to the projection coordinate system can be calculatedBetween the longitudinal axis value of the touch panel coordinate system and the longitudinal axis value corresponding to the projection coordinate systemScaling factorAnd the coordinate position of the origin of the projection coordinate system of the touch panel on the display panel in the coordinate system of the display panel is (1, 1), namely (x)0，y0) If the coordinate system of the touch panel corresponds to the coordinate system of the display panel, the coordinate system of the touch panel corresponds to (1, 1):
based on the same inventive concept, an embodiment of the present invention further provides a calibration apparatus for a touch screen, including:
the alignment control unit is used for controlling the first alignment mark on the calibration component and the second alignment mark displayed on the display panel to align, so that the equivalent touch point generated by the calibration component contacting the touch panel is the same as the position of the correction point corresponding to the second alignment mark;
the coordinate determination unit is used for determining the coordinate position of an equivalent touch point generated by the calibration component contacting the touch panel in a touch panel coordinate system;
the corresponding relation determining unit is used for determining the corresponding relation between the coordinate system of the touch panel and the coordinate system of the display panel according to the coordinate position of the correction point in the coordinate system of the display panel and the coordinate position of the determined equivalent touch point in the coordinate system of the touch panel;
and the calibration unit is used for calibrating and outputting the coordinate position where touch control occurs in the coordinate system of the touch panel according to the determined corresponding relation.
In a specific implementation, the calibration apparatus for a touch screen provided in the embodiment of the present invention further includes: and the display control unit is used for controlling the display panel to display at least one second alignment mark.
By using the calibration device of the touch screen provided by the embodiment, the equivalent touch point and the calibration point can be ensured to be the same, so that the calibration precision between the display panel and the touch panel is more accurate.
In a specific implementation of the calibration device for a touch screen according to the embodiment of the present invention, the display control unit is specifically configured to control the display panel to display a plurality of second alignment marks, and the alignment control unit is specifically configured to control the first alignment mark on the calibration component to sequentially align with the plurality of second alignment marks displayed on the display panel;
the coordinate determination unit is specifically used for determining coordinate positions of a plurality of equivalent touch points generated by the calibration component contacting the touch panel in a coordinate system of the touch panel;
the correspondence determining unit may be specifically configured to determine a correspondence between the touch panel coordinate system and the display panel coordinate system according to a coordinate position of each calibration point in the display panel coordinate system and a coordinate position of each determined equivalent touch point in the touch panel coordinate system.
In practical implementation, the correspondence determining unit of the calibration apparatus for a touch screen provided in the embodiment of the present invention may be specifically configured to calculate, according to the coordinate position (x, y) of each calibration point in the display panel coordinate system and the determined coordinate position (x ', y') of each equivalent touch point in the touch panel coordinate system, an included angle α between a horizontal axis of a projection coordinate system of the touch panel on the display panel and a horizontal axis of the display panel coordinate system, an included angle β between a vertical axis of the projection coordinate system of the touch panel on the display panel and a vertical axis of the display panel coordinate system, and a scaling coefficient k between a horizontal axis value of the touch panel coordinate system and a horizontal axis value corresponding to the projection coordinate system by using the following formulaxAnd a scaling coefficient k between a longitudinal axis value of the touch panel coordinate system and a longitudinal axis value corresponding to the projection coordinate systemyDetermining the corresponding relation between the touch panel coordinate system and the display panel coordinate system:
wherein (x)0，y0) And the coordinate position of the origin of the projection coordinate system of the touch panel on the display panel in the coordinate system of the display panel is represented.
In a specific implementation, in the calibration device for a touch screen provided in the embodiment of the present invention, the alignment control unit is specifically configured to align a center point of a first alignment mark on the calibration component with a center point of a second alignment mark displayed on the display panel; wherein,
as shown in fig. 4a and 4B, the center point of the first alignment mark a is an equivalent touch point 001 generated by the calibration component contacting the touch panel, and the center point of the second alignment mark B is a corresponding calibration point 002; alternatively, as shown in fig. 4c and 4d, the set value L of the displacement from the center point of the first alignment mark B to the set direction is the equivalent touch point 001 generated by the touch panel contacted by the calibration member, and the set value L of the displacement from the center point of the second alignment mark B to the set direction is the corresponding calibration point 002, which is not limited herein.
The invention also provides a calibration system of the touch screen, which comprises the following components: the calibration device comprises a display panel which is provided with a touch panel and can display a second alignment mark, a calibration component which is provided with a first alignment mark, and the calibration device of the touch screen provided by the embodiment of the invention.
In a specific implementation, in the calibration system of the touch panel provided in the embodiment of the present invention, the contact surface between the calibration component and the touch panel is a circular ring or a circle, as shown in fig. 6a, the contact surface between the calibration component and the touch panel is a circular ring C, a center point of the circular ring C coincides with a center point of the first alignment mark a, when the center point of the first alignment mark a is an equivalent touch point 001 generated by the calibration component contacting the touch panel, the center point of the circular ring C may also be an equivalent touch point 001 generated by the calibration component contacting the touch panel, as shown in fig. 6b, the contact surface between the calibration component and the touch panel is a circle D, when the center point of the circle D coincides with a point position where the center point of the first alignment mark a is displaced by the set value L in the set direction, and when the set value L is displaced from the center point of the first alignment mark a to the set direction and is the equivalent touch point 001 generated by the calibration component contacting the touch panel, the center point of the circle D may also be the equivalent touch point 001 generated by the calibration component contacting the touch panel, the circle C and the circle D are made of metal materials, and the contact surface between the calibration component and the touch panel may also be other regular or irregular shapes, which is not limited herein.
The embodiment of the invention provides a calibration method, a calibration device and a calibration system of a touch screen, wherein the calibration method comprises the following steps: firstly, controlling a first alignment mark on a calibration component and a second alignment mark displayed on a display panel to align, so that an equivalent touch point generated by the calibration component contacting the touch panel is the same as a correction point corresponding to the second alignment mark; then determining the coordinate position of an equivalent touch point generated by the calibration component contacting the touch panel in a coordinate system of the touch panel; then determining the corresponding relation between the coordinate system of the touch panel and the coordinate system of the display panel according to the coordinate position of the correction point in the coordinate system of the display panel and the determined coordinate position of the equivalent touch point in the coordinate system of the touch panel; and finally, according to the determined corresponding relation, calibrating the coordinate position where touch control occurs in the coordinate system of the touch panel and outputting the calibrated coordinate position. Therefore, compared with the prior art, the method for performing alignment on the first alignment mark and the second alignment mark provided by the embodiment can ensure that the equivalent touch point and the correction point are the same in position, so that the calibration precision between the display panel and the touch panel is more accurate, and the method is convenient to apply to an automatic production process.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (12)
1. A calibration method of a touch screen is characterized by comprising the following steps:
controlling a first alignment mark on a calibration component to align with a second alignment mark displayed on a display panel, so that an equivalent touch point generated by the calibration component contacting the touch panel is the same as a correction point corresponding to the second alignment mark;
determining the coordinate position of an equivalent touch point generated by the calibration component contacting the touch panel in the touch panel coordinate system;
determining a corresponding relation between the coordinate system of the touch panel and the coordinate system of the display panel according to the coordinate position of the correction point in the coordinate system of the display panel and the determined coordinate position of the equivalent touch point in the coordinate system of the touch panel; the corresponding relation is that a plurality of correction points and a plurality of corresponding equivalent touch points are adopted to determine the corresponding relation between a touch panel coordinate system and a display panel coordinate system, and comprises the steps of calibrating the relative translation deviation between the touch panel coordinate system and the display panel coordinate system of the display panel and the touch panel on the same plane, calibrating the rotation deviation between the touch panel coordinate system and the display panel coordinate system on the same plane and the relative scaling deformation deviation between the touch panel coordinate system and the display panel coordinate system caused by non-same horizontal plane;
and according to the determined corresponding relation, calibrating the coordinate position where touch control occurs in the coordinate system of the touch panel and outputting the calibrated coordinate position.
2. The method of claim 1, wherein prior to controlling the alignment of the first alignment mark on the alignment feature with the second alignment mark displayed on the display panel, comprising: and controlling the display panel to display at least one second alignment mark.
3. The method as claimed in claim 2, wherein controlling the display panel to display a plurality of second alignment marks, the controlling of the first alignment mark on the alignment component to align with the second alignment mark displayed on the display panel comprises: controlling the first alignment marks on the calibration component to be sequentially aligned with a plurality of second alignment marks displayed on the display panel;
the determining the coordinate position of the equivalent touch point generated by the calibration component contacting the touch panel in the touch panel coordinate system specifically includes: determining coordinate positions of a plurality of equivalent touch points generated by the calibration component contacting the touch panel in a coordinate system of the touch panel respectively;
determining the corresponding relationship between the touch panel coordinate system and the display panel coordinate system according to the coordinate position of the correction point in the display panel coordinate system and the determined coordinate position of the equivalent touch point in the touch panel coordinate system specifically comprises: and determining the corresponding relation between the coordinate system of the touch panel and the coordinate system of the display panel according to the coordinate position of each correction point in the coordinate system of the display panel and the determined coordinate position of each equivalent touch point in the coordinate system of the touch panel.
4. The method of claim 3, wherein determining the correspondence between the touch panel coordinate system and the display panel coordinate system comprises:
according to the coordinate position (x, y) of each correction point in the display panel coordinate system and the determined coordinate position (x ', y') of each equivalent touch point in the touch panel coordinate system, calculating an included angle α between a horizontal axis of a projection coordinate system of the touch panel on the display panel and a horizontal axis of the display panel coordinate system, an included angle β between a vertical axis of the projection coordinate system of the touch panel on the display panel and a vertical axis of the display panel coordinate system, and a scaling coefficient k between a horizontal axis value of the touch panel coordinate system and a horizontal axis value corresponding to the projection coordinate system by adopting the following formulasxAnd a scaling coefficient k between a longitudinal axis value of the touch panel coordinate system and a longitudinal axis value corresponding to the projection coordinate systemyDetermining a corresponding relationship between the touch panel coordinate system and the display panel coordinate system:
wherein (x)0，y0) And the coordinate position of the origin of the projection coordinate system of the touch panel on the display panel in the coordinate system of the display panel is represented.
5. The method according to any one of claims 1 to 4, wherein controlling the first alignment mark on the calibration component to be aligned with the second alignment mark displayed on the display panel comprises: aligning a center point of the first alignment mark on the calibration member with a center point of the second alignment mark displayed on the display panel; wherein,
the center point of the second alignment mark is a corresponding correction point, and the center point of the first alignment mark is an equivalent touch point generated when the calibration component contacts the touch panel; or, the set value of the displacement from the center point of the second alignment mark to the set direction is a corresponding correction point, and the set value of the displacement from the center point of the first alignment mark to the set direction is an equivalent touch point generated by the calibration component contacting the touch panel.
6. A calibration device for a touch screen, comprising:
the alignment control unit is used for controlling a first alignment mark on the calibration component to be aligned with a second alignment mark displayed on the display panel, so that an equivalent touch point generated by the calibration component contacting the touch panel is the same as a correction point corresponding to the second alignment mark in position;
the coordinate determination unit is used for determining the coordinate position of an equivalent touch point generated by the calibration component contacting the touch panel in the touch panel coordinate system;
the corresponding relation determining unit is used for determining the corresponding relation between the touch panel coordinate system and the display panel coordinate system according to the coordinate position of the correction point in the display panel coordinate system and the determined coordinate position of the equivalent touch point in the touch panel coordinate system; the corresponding relation is that a plurality of correction points and a plurality of corresponding equivalent touch points are adopted to determine the corresponding relation between a touch panel coordinate system and a display panel coordinate system, and comprises the steps of calibrating the relative translation deviation between the touch panel coordinate system and the display panel coordinate system of the display panel and the touch panel on the same plane, calibrating the rotation deviation between the touch panel coordinate system and the display panel coordinate system on the same plane and the relative scaling deformation deviation between the touch panel coordinate system and the display panel coordinate system caused by non-same horizontal plane;
and the calibration unit is used for calibrating the coordinate position where touch control occurs in the coordinate system of the touch panel according to the determined corresponding relation and then outputting the calibrated coordinate position.
7. The calibration device of claim 6, further comprising: and the display control unit is used for controlling the display panel to display at least one second alignment mark.
8. The calibration apparatus according to claim 7, wherein the display control unit is specifically configured to control the display panel to display a plurality of second alignment marks, and the alignment control unit is specifically configured to control the first alignment mark on the calibration component to be sequentially aligned with the plurality of second alignment marks displayed on the display panel;
the coordinate determination unit is specifically configured to determine coordinate positions of a plurality of equivalent touch points generated by the calibration component contacting the touch panel in the touch panel coordinate system respectively;
the corresponding relation determining unit is specifically configured to determine a corresponding relation between the touch panel coordinate system and the display panel coordinate system according to the coordinate position of each correction point in the display panel coordinate system and the determined coordinate position of each equivalent touch point in the touch panel coordinate system.
9. The calibration apparatus according to claim 8, wherein the correspondence determining unit is specifically configured to calculate the touch control point according to the coordinate position (x, y) of each of the calibration points in the display panel coordinate system and the determined coordinate position (x ', y') of each of the equivalent touch points in the touch panel coordinate system by using the following formulaThe panel is in an included angle α between the horizontal axis of the projection coordinate system on the display panel and the horizontal axis of the display panel coordinate system, an included angle β between the vertical axis of the projection coordinate system on the display panel and the vertical axis of the display panel coordinate system, and a scaling coefficient k between the horizontal axis value of the touch panel coordinate system and the horizontal axis value corresponding to the projection coordinate systemxAnd a scaling coefficient k between a longitudinal axis value of the touch panel coordinate system and a longitudinal axis value corresponding to the projection coordinate systemyDetermining a corresponding relationship between the touch panel coordinate system and the display panel coordinate system:
wherein (x)0，y0) And the coordinate position of the origin of the projection coordinate system of the touch panel on the display panel in the coordinate system of the display panel is represented.
10. The calibration device according to any of the claims 6 to 9, wherein the alignment control unit is specifically configured to align a center point of the first alignment mark on the calibration member with a center point of the second alignment mark displayed on the display panel; wherein,
the center point of the second alignment mark is a corresponding correction point, and the center point of the first alignment mark is an equivalent touch point generated when the calibration component contacts the touch panel; or, the set value of the displacement from the center point of the second alignment mark to the set direction is a corresponding correction point, and the set value of the displacement from the center point of the first alignment mark to the set direction is an equivalent touch point generated by the calibration component contacting the touch panel.
11. A calibration system, comprising a display panel having a touch panel and displaying a second alignment mark, a calibration component having a first alignment mark, and a calibration device of a touch screen according to any one of claims 6 to 10.
12. The calibration system of claim 11, wherein the contact surface of the calibration component and the touch panel is a circular ring or circle.
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| US10338753B2 (en) * | 2015-11-03 | 2019-07-02 | Microsoft Technology Licensing, Llc | Flexible multi-layer sensing surface |
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| WO2018058326A1 (en) * | 2016-09-27 | 2018-04-05 | 深圳市大疆创新科技有限公司 | Calibration method, calibration device, calibration system, and calibration memory |
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