Touch Display Shielding Area for False Touch Prevention
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Solution Overview
Problem
Current interactive displays often generate unnecessary touch traces when the pen-holding hand is close or touches the screen, interfering with written content.
Innovation Solution
A data processing method and device that calculates a shielding area based on the pen-holding parameters, inclination angle, and writing track position to prevent display of unwanted touch traces by determining the orthographic projection point and using pre-stored pen-holding endpoint values to define the shielding area shape and size.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the display allows touch input from any area, then touch interaction functionality is improved, but false touches from the pen-holding hand interfere with written content
Solution Approach 1:
The patent applies local quality by creating a shielding area with different touch sensitivity characteristics in the region where the pen-holding hand may appear. This shielding area is calculated based on the writing position and pen inclination angle, making the display have different touch response properties in different spatial locations. The shielding area prevents false touches while allowing normal touch interaction in non-shielded regions, thus resolving the contradiction between comprehensive touch functionality and prevention of false touches.
Solution Approach 2:
The patent introduces a shielding area as an intermediary layer between the pen-holding hand and the touch detection system. This shielding area acts as a mediator that blocks or filters out touch signals from the pen-holding hand while allowing legitimate touch inputs to pass through. The shielding area is dynamically calculated and positioned based on writing parameters, effectively mediating between the harmful hand contact and the useful touch interaction functionality.
2Object-affected harmful factors
If a shielding area is created to block false touches, then interference from pen-holding hand is reduced, but system complexity increases due to calculation requirements
Solution Approach 1:
The patent applies preliminary action by pre-calculating and storing pen-holding endpoint values and their corresponding shielding area parameters before actual writing occurs. The system pre-processes the relationship between pen inclination angles, holding positions, and resulting shielding areas, creating a lookup table or pre-computed data structure. During actual writing, the system only needs to query pre-computed values based on detected writing parameters, significantly reducing real-time calculation complexity while maintaining accurate shielding area generation.
3Measurement precision
If the shielding area is dynamically adjusted based on pen inclination angle and holding position, then accuracy of false touch prevention is improved, but computational requirements increase
Solution Approach 1:
The patent pre-calculates shielding area parameters for various pen inclination angles and holding positions, storing these as reference data. Instead of performing complex geometric calculations in real-time, the system retrieves pre-computed shielding area characteristics based on detected pen parameters. This preliminary computation approach maintains high positioning accuracy while significantly reducing real-time computational power requirements.
Solution Approach 2:
The patent changes the computational approach from real-time geometric calculation to parameter-based lookup. By transforming the problem from calculating shielding areas based on continuous geometric parameters to selecting from discrete pre-computed parameter sets, the system maintains precision while reducing computational burden. The system adjusts shielding area characteristics by selecting from pre-defined parameter combinations rather than performing continuous mathematical operations.
Data Source
AI summary
The present disclosure relates to a data processing method and apparatus, and an intelligent interactive device. The data processing method is performed by a display having a touch function. The method include: obtaining a writing track point position when a writing pen writes on the display, and an inclination angle of the writing pen relative to the display during writing; obtaining a touch track point position of a user on the display at a current moment obtaining a holding parameter for holding the writing pen; determining a shielding area for a touch at the current moment according to the holding parameter, the inclination angle and the writing track point position; and when touch track point position is located in the shielding area, not displaying a track of the touch track point position on the display.