Portable Computer Optical Hinge Power Control
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Solution Overview
Problem
Existing power control mechanisms in notebook computers, such as cover switches and magnetic switches, are inefficient and prone to errors, leading to unnecessary power consumption and aesthetic issues, as they struggle to accurately manage the power supply of the LCD display when it is not in use.
Innovation Solution
A portable computer design incorporating a hinge with an optical sensor and grating, along with a control circuit and resistance sensor, which generates control signals based on the open angle of the LCD display relative to the main unit, allowing precise control over the backlight module's power supply, thereby optimizing battery usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If a cover switch is used to control LCD display power supply, then the power consumption is reduced when LCD is not in use, but the aesthetic appearance is compromised and mechanical malfunctions may occur
Solution Approach 1:
The patent replaces the mechanical cover switch with an optical sensing system consisting of an optical sensor, optical grating, and control circuit. The optical sensor detects the opening angle of the LCD display through the optical grating, and the control circuit automatically adjusts power supply based on detected angle, eliminating mechanical components while maintaining power-saving functionality and aesthetic appearance.
2Shape
If a magnetic switch is used to control LCD display power supply, then the aesthetic appearance is maintained, but control accuracy deteriorates due to Gauss value attenuation and distance detection variability
Solution Approach 1:
The patent replaces the magnetic switch with an optical sensing system. The optical sensor detects the LCD opening angle through the optical grating, providing precise and stable detection without the issues of magnetic field attenuation or distance variability. This optical approach maintains aesthetic appearance while significantly improving measurement precision and control accuracy.
3Ease of operation
If the LCD display remains on when not in use, then the system is ready for immediate use, but battery power is wasted
Solution Approach 1:
The patent implements dynamic power management by detecting the LCD opening angle and automatically adjusting power supply state. When the LCD is closed or at small angles, power is automatically cut off. When opened to larger angles, power is activated. This dynamic adjustment eliminates the need to keep the LCD permanently on while ensuring immediate readiness when needed, optimizing both energy efficiency and operational readiness.
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 solution accurately manages the power supply of the LCD display and system, reducing battery power consumption by adjusting the backlight's brightness and turning it off when necessary, while maintaining a sleek design and avoiding mechanical malfunctions.
Implementation Method 1
The optical sensor generates a first sensing voltage when one of the blocking zones blocks the beam from the receiver means. The optical sensor generates a second sensing voltage when the beam passes through one of the openings to the receiver means.
Data Source
AI summary
A portable computer with a power control function is disclosed to include a first body, a hinge, a second body coupled to the first body through the hinge, an optical sensor having a transmitter and a receiver and mounted on the first body, an optical grating connected to the hinge and having a part located between the transmitter and the receiver, a control circuit, and an electronic component. When the second body is turned relative to the first body, the optical sensor generates a first sensing voltage and a second sensing voltage subject to the turning action of the optical grating so that the control circuit controls the power of the electronic component based on the first sensing voltage and the second sensing voltage provided by the optical sensor.