Haptic Controller Instruction Sequencing for Complex Touch Feedback
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Solution Overview
Problem
Conventional haptic solutions for touch screens face limitations due to demanding host interface communication, limited haptic effect variations, and low power efficiency, primarily attributed to on-chip low drop-out regulators.
Innovation Solution
A haptic controller system comprising a plurality of haptics instructions, an instruction sequencer, a sine wave generator, and a class-D amplifier, which generates a sine wave based on a haptic profile to produce desired haptic effects, including amplitude, frequency, and duration, allowing for complex haptic feedback with improved power efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional haptic solutions are used with host interface communication, then haptic feedback can be provided, but communication bottlenecks limit haptic effect variations and control flexibility
Solution Approach 1:
The patent extracts the haptic control functionality from the host processor by implementing a dedicated haptic controller with its own instruction set and processing capabilities. This allows the haptic controller to independently generate and execute haptic effects without burdening the host interface, thereby increasing haptic effect variations while reducing communication complexity.
Solution Approach 2:
The haptic controller serves as an intermediary device between the host system and the haptic output device. It receives high-level commands from the host and translates them into detailed haptic profiles using its internal instruction sequencer and sine wave generator, effectively mediating between simple host commands and complex haptic effects.
2Use of energy by moving object
If conventional haptic controllers are used with on-chip LDO regulators, then power supply is provided, but power efficiency is low
Solution Approach 1:
The patent changes the power management approach by replacing the conventional LDO regulator with a switching regulator architecture. This parameter change in the power supply method significantly improves power efficiency by reducing power loss, while the switching regulator's integrated design keeps the overall device complexity manageable.
Data Source
AI summary
A method for generating a desired haptics effect is provided. A haptics effect instruction is generated by a host processor responsive to a touch screen, where the haptics effect instruction corresponds to the desired haptics effect. This haptics effect instruction is received by a haptics driver, and a haptic profile from the haptics effect instruction is generated from the haptics effect instruction. The haptic profile includes at least one of a profile word, a move word, wait/halt word, and a branch word, and a sine wave is generated from the from the haptic profile that corresponds to the desired haptics effect.