Calibrating method and apparatus for touch screen equipment

A calibration method and touch screen technology, applied in the input/output process of data processing, instruments, electrical and digital data processing, etc., can solve the problems of transformation, data inversion, and unusable touch screen equipment.

Inactive Publication Date: 2009-03-11
GUANGDONG VTRON TECH CO LTD
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

According to different site conditions, there may be various ways to install the touch screen device, which may cause the coordinate system adopted by the touch screen device to be inconsistent with the coordinate system adopted by the display device. Some calibration methods are used to calibrate, which may cause the final output data of horizontal coordinates and vertical coordinates to be reversed or transformed, making the touch screen device unusable

Method used

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  • Calibrating method and apparatus for touch screen equipment
  • Calibrating method and apparatus for touch screen equipment
  • Calibrating method and apparatus for touch screen equipment

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Embodiment Construction

[0026] The following describes in detail specific embodiments of the present invention.

[0027] According to people's usual addressing habits, in the following descriptions, the horizontal coordinate is used as the first coordinate and the vertical coordinate is used as the second coordinate for illustration. Correspondingly, the horizontal coordinate pixel refers to the maximum pixel value of the first coordinate, and the vertical coordinate Pixel refers to the maximum pixel value of the second coordinate, the rotation coefficient of the abscissa refers to the rotation coefficient of the first coordinate, and the rotation coefficient of the ordinate refers to the rotation coefficient of the second coordinate. It should be noted that this example is not used for touch screen devices , the orientation of the display device and the coordinate system used are restricted.

[0028] Because under normal circumstances, touch screen devices use the wider side as the horizontal coordi...

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Abstract

The invention relates to a calibration method and a calibration device for touch screen equipment. A coordinate system rotation coefficient is determined according to the maximum pixel values of a first coordinate and a second coordinate of display equipment; according to the coordinate system rotation coefficient, a first preset point and a second preset point located at the display equipment, and a first touch point and a second touch point which are detected by the touch screen equipment when the first and the second preset points are touched, a first coordinate rotation coefficient and a second coordinate rotation coefficient are determined and a transforming relationship which transforms an initial coordinate system of the touch screen equipment into the transformed coordinate system of the touch screen equipment, with a coordinate system direction the same as that of the display equipment; according to the transforming relationship, the touch screen equipment can output the position coordinate of the transformed coordinate system, which has the same coordinate system direction as the display equipment, thus being convenient for transforming the position coordinate into the coordinate located at the display equipment and preventing the circumstance that the real touch position is different from the display position of the display equipment, which is caused by that when the touch screen equipment is installed on the display equipment, the direction is different.

Description

technical field [0001] The invention relates to the technical field of touch screens, in particular to a calibration method and a calibration device for touch screen equipment. Background technique [0002] As a relatively simple and mature human-computer interaction device, the touch screen has been widely used in many fields. The realization of the existing touch screen technology mainly includes several realization methods such as resistance, capacitance, camera, and infrared rays. Among them, taking an infrared touch screen as an example, its basic structure is to install several pairs of infrared emitting elements and infrared receiving elements in a certain order on the periphery of a display surface. These infrared emitting elements and infrared receiving elements form a transmitting and receiving pair in a one-to-one correspondence, forming a mutually perpendicular transmitting and receiving array along the edge of the display surface, and the infrared rays emitted b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F3/041
Inventor 徐响林
Owner GUANGDONG VTRON TECH CO LTD
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