Display Device Haptic Feedback Control via Interference
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Solution Overview
Problem
Display devices face challenges in providing precise haptic feedback due to insufficient vibration or vibrations occurring in unintended areas, as existing vibrators struggle to accurately control tactile feedback.
Innovation Solution
The implementation of a display device with a main vibrator and multiple sub-vibrators spaced apart to generate specific phase-different vibration waves, allowing for constructive or destructive interference, thereby enabling precise vibration control and haptic operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a single vibrator is used to provide haptic feedback, then the device structure is simple, but the vibration control precision is insufficient and vibrations occur in unintended areas
Solution Approach 1:
The single vibrator is divided into multiple sub-vibrators (first sub-vibrator, second sub-vibrator, third sub-vibrator) that are spatially separated and controlled independently. Each sub-vibrator generates vibration waves that interfere with each other, allowing precise control of vibration distribution across different areas of the display panel.
Solution Approach 2:
Different sub-vibrators are configured to provide different vibration characteristics to different regions of the display panel. By controlling the phase and amplitude of each sub-vibrator individually, the system can create localized vibration zones that precisely match touch input positions without causing unwanted vibrations in other areas.
2Measurement precision
If multiple vibrators are used to improve vibration control precision, then the vibration control precision improves, but the device complexity increases
Solution Approach 1:
The patent extracts the vibration generation function from a single complex vibrator and distributes it across multiple simpler sub-vibrators. This allows the system to achieve precise haptic feedback control by independently managing each sub-vibrator, reducing the complexity of individual components while improving overall system precision.
Solution Approach 2:
The patent utilizes wave interference principles where vibration waves from multiple sub-vibrators combine constructively at desired locations and destructively at undesired locations. By controlling the phase relationships between sub-vibrators, the system achieves precise spatial control of haptic feedback without requiring complex mechanical structures.
3Measurement precision
If vibration waves from multiple sub-vibrators are used, then precise vibration control is achieved, but the energy management becomes more complex
Solution Approach 1:
The sub-vibrators operate with controlled periodic vibrations at specific phases. By synchronizing the periodic actions of multiple sub-vibrators with precise phase relationships, the system achieves constructive interference at target locations and destructive interference at other locations, enabling efficient energy distribution without excessive complexity in power management.
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 configuration allows for precise haptic feedback by amplifying vibration at touch points and reducing it in other areas, enhancing user interaction and immersion in applications.
Implementation Method 1
the first sub-vibration wave and the second sub-vibration wave may be configured to destructively interfere with the main vibration wave
Data Source
AI summary
A display device includes a display panel, a main vibrator disposed on the display panel configured to generate a main vibration wave, and a plurality of sub-vibrators disposed on the display panel and spaced apart from the main vibrator and configured to the plurality of sub-vibrators configured to generate sub-vibration waves, respectively, wherein the plurality of sub-vibrators includes a first sub-vibrator disposed at a first distance from the main vibrator in a plan view, the first sub-vibrator being configured to generate a first sub-vibration wave; and a second sub-vibrator disposed at a second distance from the main vibrator in the plan view, the second sub-vibrator being configured to generate a second sub-vibration wave having a phase different from the first sub-vibration wave, and, wherein the second distance is different from the first distance.