Optical Cable Angle Detection for Display Devices
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Solution Overview
Problem
Conventional display device angle detection systems, such as those using encoder wheels and accelerometers, fail to accurately detect the angle of a display member relative to a base member, especially in orientations like the 'book' configuration, due to their limitations and requirement for extra hardware.
Innovation Solution
An information handling system employing an optical cable that connects the display device and processing system, where the processing system determines signal loss to calculate the angle between the display and base chassis, using this method to perform instructions based on the detected angle.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional encoder wheels and accelerometers are used for angle detection, then the system can detect display member angle, but the system requires additional hardware and fails to accurately detect angle in book orientation
Solution Approach 1:
The optical cable performs dual functions: transmitting optical signals for display data and serving as an angle sensor by detecting signal loss due to bending. This eliminates the need for separate angle detection hardware while maintaining accurate angle measurement across all orientations including book mode
Solution Approach 2:
The optical cable monitors its own bending state by detecting changes in its transmitted optical signal. The system uses the cable's inherent optical properties to self-diagnose its physical state, eliminating the need for external sensing mechanisms
2Adaptability or versatility
If dual 9-axis sensors are used for angle detection, then the system can detect orientation, but the system fails to detect angle in book orientation and requires additional hardware
Solution Approach 1:
The optical cable serves multiple purposes: data transmission and angle sensing across all device orientations. This universal approach provides reliable angle detection in book orientation and other configurations without requiring orientation-specific sensor configurations
3Measurement precision
If encoder wheels integrated with hinge are used, then the system can detect display member angle, but the system fails to provide accurate detection under all circumstances
Solution Approach 1:
The patent replaces mechanical angle sensing (encoder wheels) with an optical sensing approach. By measuring optical signal loss in the cable, the system determines bending angle without mechanical contact, providing accurate detection across all orientations including book mode where mechanical sensors fail
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 provides accurate and reliable angle detection across various configurations, including the 'book' orientation, without the need for additional hardware, enhancing user experience and functionality.
Implementation Method 1
an optical cable connecting each of the display device and the processing system... determine signal loss of an optical signal provided by the processing system through the optical cable to the display device
Data Source
AI summary
A angle detection system, includes a first member pivotally coupled to a second member. An optical cable connecting an optical transmitter provided on the first member and an optical receiver provided on the second member is used by an angle detection engine to determine signal loss of an optical signal provided by the optical transmitter through the optical cable to the optical receiver. The angle detection engine then determines, based on the signal loss, a first angle of the second member relative to the first member. The angle detection engine then performs an instruction based on the first angle.