Input Device Signal Strength Adjustment for Display Separation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current input devices for multimedia electronic devices, such as active pens, face challenges in providing reliable and intuitive touch-based input, especially in applications requiring precise writing or drawing, due to limitations in sensing performance and signal strength adjustment based on separation distance from the display device.
Innovation Solution
An interface device comprising a display device with a sensor layer and an input device that adjusts signal strength based on separation distance, using a controller to calculate and adjust voltage levels, allowing for improved sensing performance by enhancing signal detection and transmission between the input device and the display device.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the input device transmits a signal with fixed strength, then the device structure is simple, but the sensing performance degrades when the separation distance increases
Solution Approach 1:
The patent implements dynamic signal strength adjustment by modifying the transmission signal based on the detected separation distance between the input device and display device. The controller dynamically changes the signal strength parameter (voltage or power) in response to distance variations, transforming a static signal transmission system into a dynamic adaptive system that maintains sensing performance across different distances.
Solution Approach 2:
The patent changes the electrical parameter (signal strength, voltage, or power) of the transmission signal based on the separation distance. When the distance increases, the signal strength parameter is increased to compensate for signal attenuation, and when the distance decreases, the signal strength is reduced. This parameter adaptation resolves the contradiction between maintaining sensing performance and avoiding unnecessary complexity.
2Reliability
If the signal strength is increased to maintain detection at distance, then the sensing range is improved, but the energy consumption increases
Solution Approach 1:
The system dynamically adjusts signal strength based on real-time distance detection rather than maintaining a fixed high signal level. The controller monitors separation distance and modulates transmission power accordingly, ensuring energy is consumed only at the necessary level for current operating conditions, thus improving energy efficiency while maintaining detection capability.
Solution Approach 2:
The signal strength parameter is adaptively changed according to separation distance measurements. When objects are far apart, higher signal strength is used to ensure detection; when objects are close, signal strength is reduced to minimize energy consumption. This conditional parameter adjustment resolves the contradiction between detection capability and energy usage.
3Ease of operation
If the input device is in direct contact with the display device, then the signal strength is sufficient, but the user experience is limited compared to distance-based input
Solution Approach 1:
The system dynamically adapts to different operational modes (contact vs. non-contact) by adjusting signal parameters based on detected separation distance. This enables the system to reliably detect inputs whether the input device is touching the display or held at a distance, providing users with flexible interaction options while maintaining detection reliability across both modes.
Solution Approach 2:
The signal detection parameters are changed based on separation distance to accommodate different user interaction styles. When distance is detected, the system adjusts sensitivity and signal strength parameters to enable reliable non-contact input, thereby enhancing user experience without sacrificing detection reliability.
4Reliability
If the signal strength varies with distance, then the sensing performance is improved, but the device complexity increases due to additional control mechanisms
Solution Approach 1:
The patent combines the distance detection function and signal strength control function within an integrated controller unit. Rather than adding separate independent systems, the controller merges multiple functions (distance measurement, signal analysis, and transmission power adjustment) into a unified control mechanism, reducing overall system complexity while achieving distance-adaptive sensing performance.
Solution Approach 2:
The controller is designed as a multi-functional component that performs both distance detection and signal strength regulation. This universal controller handles multiple tasks that would otherwise require separate dedicated components, thereby improving sensing performance through distance-adaptive signaling while minimizing the increase in device complexity.
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
The solution enables the interface device to sense inputs not only when the input device is in direct contact but also at a distance, improving user experience and reducing signal degradation, thus enhancing the sense of writing and reducing image quality degradation.
Implementation Method 1
strength of the second signal is determined according to a separation distance between the display device and the input device
Data Source
AI summary
An interface device includes: a display device including a display layer and a sensor layer on the display layer; and an input device configured to receive a first signal from the sensor layer and to output a second signal to the sensor layer, wherein a strength of the second signal is determined according to a separation distance between the display device and the input device.