Rotating Mirror Camera State Detection via Approach Sensing
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Solution Overview
Problem
Existing mobile terminals face challenges in effectively detecting and switching between front-facing and rear-facing camera states, leading to a poor user experience due to the inability to reliably determine the camera state in real-time.
Innovation Solution
A two-way photographing system for mobile terminals, which includes a rotating mirror and an approach sensing apparatus to detect the state of the camera, allowing for real-time state detection and efficient switching between front and rear reflection states, utilizing a main control chip to set applications accordingly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If a rotating apparatus is used to rotate a single camera to achieve two-way photographing, then cost is saved by using one camera instead of two, but the reliability of real-time state detection deteriorates because the main chip can only determine camera state by comparing initial state with switching operations
Solution Approach 1:
The patent introduces an approach sensing apparatus as an intermediary component to detect the camera state. This sensing apparatus independently detects whether the camera is in front-facing or rear-facing state and provides detection signals to the main control chip, eliminating the need for the main chip to track state changes through switching operations. This resolves the contradiction by maintaining single-camera cost savings while achieving reliable real-time state detection through the intermediary sensing mechanism.
2Adaptability or versatility
If the user frequently switches the camera between front-facing and rear-facing states, then versatility of the photographing system is improved, but the ease of operation deteriorates because it is hard to synchronously detect the rotation of the camera in real-time
Solution Approach 1:
The patent implements a feedback mechanism where the approach sensing apparatus continuously monitors the camera's physical position and provides real-time detection signals to the main control chip. This feedback loop enables the system to immediately recognize when the camera has switched between front-facing and rear-facing states, allowing the user interface to respond instantly to the actual camera state. This resolves the contradiction by enabling frequent state switching while maintaining ease of operation through real-time feedback-driven responsiveness.
3Device complexity
If no angle sensor is disposed in the mobile terminal, then device complexity is reduced, but the measurement precision of camera rotation angle deteriorates
Solution Approach 1:
The patent extracts the essential detection function from complex angle sensors and implements a simplified approach sensing apparatus that only needs to detect binary states (front-facing or rear-facing) rather than continuous rotation angles. This extraction approach removes the need for complex angle measurement mechanisms while retaining sufficient measurement precision for the specific application requirement of determining camera orientation state. The solution resolves the contradiction by taking out the unnecessary complexity of precise angle measurement while maintaining adequate precision for state identification.
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
Enables reliable real-time detection of the camera state and quick switching between states, improving user experience by allowing seamless transitions and appropriate application settings.
Implementation Method 1
an approach sensing apparatus, located adjacent to the first end when the rotating mirror is in the front reflection state or adjacent to the second end when the rotating mirror is in the rear reflection state, and configured to detect the first end so as to generate a first detecting signal when the rotating mirror is in the front reflection state, and to detect the second end so as to generate a second detecting signal when the rotating mirror is in the rear reflection state
Implementation Method 2
a camera module, including a rotating mirror and a lens, in which the rotating mirror is rotatable about an axis of the rotating mirror to a front reflection state for reflecting incident light through the front light entrance to the lens or a rear reflection state for reflecting incident light through the rear light entrance to the lens
Data Source
AI summary
Disclosed are a two-way photographing system of a mobile terminal and a control method. The system includes a rotating mirror, a lens and an approach sensing apparatus. The rotating mirror is rotatable around the axis to a front reflection state or a rear reflection state for reflecting the incident light to the lens. The rotating minor has a first end close to the front light entrance and a second end close to the rear light entrance. The approach sensing apparatus is located adjacent to the first end when the rotating minor is in the front reflection state or adjacent to the second end when the rotating mirror is in the rear reflection state, and configured to generate a first detecting signal when the rotating mirror is in the front reflection state and to generate a second detecting signal when the rotating mirror is in the rear reflection state.