Context-Aware Touch Input Filtering for Totem Interaction
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Solution Overview
Problem
Conventional touchscreen devices face challenges in distinguishing between intended and unintended inputs, particularly when objects like totems are placed on the screen, leading to false touch detection and reduced input precision.
Innovation Solution
The system employs a touch controller and operating system collaboration to filter and interpret inputs based on user interface context, using active capacitance and friction devices to manage totem position and movement, providing visual feedback and haptic responses to enhance user interaction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the touchscreen device uses conventional touch detection methods to detect all touches on the screen, then it can detect all user inputs including those from totems, but it cannot distinguish between intended and unintended inputs leading to false touch detection
Solution Approach 1:
The patent introduces an intermediary classification system that acts as a mediator between the touch detection mechanism and the input processing system. This intermediary analyzes touch characteristics (duration, pressure, location patterns) to distinguish between totem touches and intentional user inputs, thereby resolving the contradiction between detecting all touches and filtering false inputs.
Solution Approach 2:
The patent changes the parameters used for touch detection by analyzing multiple characteristics of touches simultaneously (duration, pressure, location sequences) rather than relying on a single parameter. This multi-parameter approach enables the system to differentiate between totem touches and intentional inputs, improving both detection accuracy and input reliability.
2Productivity
If the system processes all detected touches as potential inputs, then it ensures no intended input is missed, but it increases system load and processing latency
Solution Approach 1:
The patent extracts and removes false touches (totem touches) from the stream of detected touches before they reach the input processing system. By taking out these irrelevant inputs early in the processing chain, the system reduces the workload and processing latency for legitimate user inputs, thereby improving overall input processing efficiency.
Solution Approach 2:
The patent performs preliminary classification and filtering of touches before they are processed as potential inputs. This preliminary action of identifying and removing totem touches in advance reduces the burden on the main input processing system, decreasing latency and improving efficiency for actual user interactions.
3Ease of operation
If the touchscreen device accepts all touch inputs without context awareness, then it maintains simplicity in operation, but it reduces input precision when objects like totems are placed on the screen
Solution Approach 1:
The patent implements a universal touch processing system that handles both traditional finger touches and totem touches through the same interface. The context-aware classification mechanism enables the system to automatically adapt to different touch types without requiring users to change their interaction method, maintaining ease of operation while improving input precision through intelligent differentiation.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach reduces system load and latency by filtering out irrelevant inputs, improves input precision, and provides real-time feedback, allowing for more accurate and efficient interaction with objects on the touchscreen.
Implementation Method 1
a touch controller interfaced with capacitive sensors of the display so that the location of touches are determined
Implementation Method 2
A friction device selectively locks and releases a totem in place on a touch surface to prevent undesired movement
Data Source
AI summary
Context aware input masking by a touchscreen touch controller filters touch inputs by a totem at a touchscreen to those detected touches relevant to a user interface presented on a touchscreen display. For example, a rotational user interface that accepts values based upon the rotational orientation of a totem has rotational orientation inputs sent from the touch controller while linear inputs are withheld. As another example, a linear user interface that accepts values based upon a position along a length of the totem has linear inputs sent from the touch controller while rotational inputs are withheld.