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Contact multi-filtration mechanism of touch screen

A multi-layer filtering, touch screen technology, applied in the field of mobile communication terminal equipment, handheld computer PDA terminal equipment, can solve the problems of user inconvenience, inconsistency, wrong operation, etc.

Inactive Publication Date: 2009-08-12
TECHFAITH INTELLIGENT HANDSET TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the user clicks the touch screen, the underlying hardware will report the coordinates of the touch point, but due to hardware limitations, the reported coordinates will not match the actual clicked position of the user. If the reported coordinates are not processed and the direct response will lead to a series of wrong operations, giving Inconvenience to users

Method used

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  • Contact multi-filtration mechanism of touch screen

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0005] The first layer: stability filter

[0006] Circularly start the hardware to collect the contact coordinates, and judge whether the relative error of the contact coordinates collected 5 times in a row is less than the accuracy requirement. If it meets the requirements, enter the second layer of filtering, otherwise, it will be processed as abnormal coordinates.

[0007] Second layer: peak filtering

[0008] Collect 3 effective contact coordinates according to the mechanism of the first layer, filter out the maximum and minimum values, and report the middle value.

[0009] The third layer: continuous stroke filtering

[0010] When the user writes on the touch screen, the stylus will continuously touch the touch screen and report the coordinates. Therefore, it is necessary to compare the currently reported coordinates with the previous coordinates. If the span of the two coordinates exceeds a certain range (the specific value depends on the size of the touch screen and t...

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PUM

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Abstract

The invention discloses a multilayer filter mechanism of touch screen contacts, and relates to a mobile terminal device, in particular to a mobile communication terminal device with touch screen function, a palm computer PDA terminal device, and the like. In order to reduce the report probability of error contacts and simultaneously avoid filtering normal contacts, the invention defines a set of the multilayer filter mechanism for the contacts, and can realize effective filter for the contacts through the mechanism. The multilayer filter mechanism comprises three layers of filter, namely, stability filter, peak value filter and continuous stroke filter.

Description

technical field [0001] The invention relates to mobile terminal equipment, in particular to a mobile communication terminal equipment with a touch screen function, a palmtop computer PDA terminal equipment and the like. Background technique [0002] Many current terminal devices that interface with users, such as mobile phones, have a touch screen function. When the user clicks the touch screen, the underlying hardware will report the coordinates of the touch point, but due to hardware limitations, the reported coordinates will not match the actual clicked position of the user. If the reported coordinates are not processed and the direct response will result in a series of wrong operations, giving Inconvenience to users. Therefore, it is very necessary to filter the coordinates reported by the hardware by software. Contents of the invention [0003] In order to reduce the reporting probability of wrong contacts and avoid filtering out normal contacts, the present inventi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F3/041
Inventor 何伟王宏庄
Owner TECHFAITH INTELLIGENT HANDSET TECH BEIJING