Method and device for improving accuracy of edge coordinates of projection-type capacitive touch panel

一种电容触控面板、边缘坐标的技术，应用在电数字数据处理、数据处理的输入/输出过程、仪器等方向，能够解决误差大等问题

Active Publication Date: 2015-07-15
EVERDISPLAY OPTRONICS (SHANGHAI) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Similarly, for edge touch points, the error between the y coordinate calculated by the calculation method of the prior art and the actual y coordinate is also relatively large

Method used

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  • Method and device for improving accuracy of edge coordinates of projection-type capacitive touch panel
  • Method and device for improving accuracy of edge coordinates of projection-type capacitive touch panel
  • Method and device for improving accuracy of edge coordinates of projection-type capacitive touch panel

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Embodiment Construction

[0026] figure 2 A schematic plan view of the projected capacitive touch panel involved in the embodiment of the present application is schematically shown. The panel includes the projected capacitive touch panel including M sensing lines L arranged along one direction (for example, along the x-axis direction) 1 , L 2 ,... L M , where L 1 and L M is the edge sense line. P21, P22 and P23 respectively represent three touch points, the center of the cross line of each point represents the actual position of each point, and the area framed by the thick line represents the touch sensing range.

[0027] image 3 A flowchart schematically showing a method for improving the accuracy of edge coordinates of a projected capacitive touch panel according to an embodiment of the present application, the method includes the following steps:

[0028] Step S101 , acquiring the signal strength sensed by the sensing line covered by the touch sensing range of the edge touch point.

[0029...

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Abstract

A method for improving coordinate accuracy of a touch panel having sensing lines arranged to form an array includes the steps of: detecting existence of a touch point influencing at least one sensing line; determining existence of an edge sensing line; providing signal strengths to the at least one sensing line and a sensing line immediately adjacent to the at least one sensing line; generating a virtual sensing line extending out the touch panel and immediately adjacent to the at least one sensing line; providing a signal strength to the virtual sensing line; and obtaining actual coordinate of the touch point by weighing coordinates of the at least one sensing line, the sensing line immediately adjacent to the at least one sensing line and the virtual sensing line via system generated coordinates.

Description

technical field [0001] The present application relates to coordinate calculation of a projected capacitive touch panel, and in particular to a method and device for improving the accuracy of edge coordinates of a projected capacitive touch panel. Background technique [0002] At present, the calculation of the touch coordinates of the projected capacitive touch panel mostly adopts the weighted average method. Such a calculation method can meet the accuracy requirements in various applications. However, when the touch position is close to the edge of the touch panel, this calculation method will cause a large error in the calculated edge coordinates, so that when using or cause false touches on the application interface. [0003] figure 1 An example of a method for calculating touch coordinates of a projected capacitive touch panel in the prior art is schematically shown. Taking a sensor array with 6 rows and 8 columns as an example, P11, P12, and P13 respectively represen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F3/044
CPCG06F3/0418G06F3/04186G06F3/044G06F3/04166
Inventor 邱昌明林孝义
Owner EVERDISPLAY OPTRONICS (SHANGHAI) CO LTD
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