Rotatable Display Module with Optical Rotation Sensing
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Solution Overview
Problem
Conventional displays with rotatable modules have complex structures, difficult manufacturing processes, and high costs due to the use of touch-press type switches and conducting wires for sensing and controlling the rotation of the display module.
Innovation Solution
A display design featuring a base with a sensing region and a rotatably coupled display module, where an electromagnetic or infra-red sensing element determines the angle of rotation by sensing changes in a magnetic field or infra-red light intensity, allowing the control element to control the on-screen display (OSD) accordingly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a touch-press type switch and conducting wire are used to control OSD rotation, then the display module can rotate and control the OSD, but the structure becomes complicated and manufacturing cost increases
Solution Approach 1:
The patent replaces the mechanical touch-press switch and conducting wire system with an optical sensing system. A light source emits light toward a photodetector, and the rotation of the display module changes the light path, causing the photodetector to detect light intensity changes. This optical system eliminates the need for mechanical contacts and complex wiring, directly resolving the technical contradiction by reducing structural complexity while maintaining rotation control capability.
2Reliability
If a touch-press type switch is disposed on the rotation axis, then the display module rotation can be sensed, but the conducting wire may be twisted during rotation and interference with other elements occurs
Solution Approach 1:
The patent eliminates the conducting wire by using an optical sensing mechanism. The light source and photodetector are positioned such that the rotation of the display module modulates the light path without requiring physical wire rotation. This substitution removes the harmful wire twisting and interference issues entirely while maintaining reliable rotation sensing through optical intensity changes detected by the photodetector.
3Measurement precision
If precise positioning of the touch-press switch is required on the rotation axis, then rotation detection accuracy improves, but manufacturing precision requirements increase
Solution Approach 1:
The patent replaces the mechanically positioned touch-press switch with an optical system where the light source and photodetector are arranged to detect rotation through light path modulation. This optical approach reduces manufacturing precision requirements because the system detects rotation based on light intensity changes rather than requiring precise mechanical positioning of a switch contact point, while still achieving accurate rotation detection.
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 design simplifies the structure, eases manufacturing, and reduces costs by eliminating the need for complex mechanical sensing and wiring, while effectively controlling the OSD rotation based on the display module's position.
Implementation Method 1
the sensing element can be an electromagnetic sensing element for generating a magnetic field and for sensing an intensity of the magnetic field
Implementation Method 2
the sensing element can be an infra-red sensing element which can emit a first infra-red light for sensing a reflected second infra-red light
Data Source
AI summary
A display comprises a base, a display module and a sensing device. The base has a sensing region and the display module has a control device. The sensing device is electrically connected with the control device and the display module is rotatably coupled to the base. The control device can determine that an angle of rotation of the display module with respect to the base according to a corresponding relation between the sensing device and the sensing region of the base.