Optical Data Carrier Standby Power Reduction via Photovoltaic Extraction
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Solution Overview
Problem
Optical data carriers face high power consumption during standby due to the need for primary batteries and interference from direct disturbance lights like sunlight, which limits data transmission speed and increases device size.
Innovation Solution
A data carrier system using a light receiving element, a power supply, and a reception circuit with a comparator, capacitor, and reactive-current resistor to manage power consumption during standby and communication, preventing current flow during direct disturbance light exposure and optimizing power use during signal reception.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If a primary battery is mounted in the data carrier to obtain operating power, then the data carrier can operate during communication, but the battery is exhausted during standby due to reception circuit operation and direct disturbance light
Solution Approach 1:
The patent extracts and removes the primary battery from the data carrier, eliminating the power supply component that causes battery exhaustion during standby. The reception circuit is designed to operate without continuous power supply by utilizing the photovoltaic effect from received light signals to generate necessary operating power only during communication periods.
Solution Approach 2:
The data carrier performs self-service by generating its own operating power during communication through the photovoltaic effect. The reception circuit converts received light signals into electrical energy, which is then used to power the circuit operations, eliminating the need for external battery power and achieving energy self-sufficiency during active communication.
2Reliability
If the reception circuit operates continuously during standby to receive data, then the data carrier is ready for communication, but the primary battery is exhausted
Solution Approach 1:
The reception circuit operates periodically rather than continuously. It activates only when light signals are detected during communication periods and remains inactive during standby periods. This periodic operation pattern maintains communication readiness when needed while eliminating continuous power consumption that would exhaust the battery.
Solution Approach 2:
The patent removes the continuous power supply requirement by extracting the battery component. The reception circuit is redesigned to function without continuous electrical power, using instead the photovoltaic conversion of received light signals to provide power only during active communication, thereby eliminating standby power consumption.
3Loss of energy
If direct disturbance light such as sunlight or illumination light is incident on the light receiving element during standby, then electromotive force is generated and current flows through the primary battery, but the battery exhausts
Solution Approach 1:
The patent converts the harmful effect of direct disturbance light during standby into a beneficial feature. The photovoltaic effect, which previously caused unwanted current flow and battery exhaustion, is now utilized to generate operating power during communication periods. The reception circuit is designed to distinguish between disturbance light during standby and signal light during communication, converting the latter into useful electrical energy.
Solution Approach 2:
The data carrier generates its own operating power from received light signals through the photovoltaic effect. During communication, the reception circuit converts signal light into electrical energy to power its operations, achieving self-service without external battery power. This eliminates the problem of battery exhaustion from both intentional and unintentional light exposure.
4Speed
If optical data carrier system is used, then communication distance and data capacity are improved, but power consumption during standby increases due to primary battery requirement
Solution Approach 1:
The patent extracts and removes the primary battery from the optical data carrier system, eliminating the source of continuous power consumption during standby. The reception circuit is redesigned to operate without continuous electrical power supply, using instead the photovoltaic conversion of received light signals to provide power only during active communication periods.
Solution Approach 2:
The optical data carrier system achieves self-service by generating its own operating power during communication through the photovoltaic effect. The reception circuit converts received light signals into electrical energy, which is then used to power the circuit operations, eliminating the need for external battery power and achieving energy self-sufficiency during active communication while reducing standby power consumption to zero.
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 system effectively suppresses power consumption during standby and enables efficient data transmission by controlling current flow, extending battery life and maintaining communication stability.
Implementation Method 1
a light receiving element (for example, a photo diode) of the data carrier, and the generated power is stored in a capacitor
Data Source
AI summary
A data carrier 2 is provided with a comparator 41, a capacitor 42, a comparator operation adjustment resistor 43, a resistance voltage divider circuit 44 and a reactive-current resistor 45. The capacitor 42 is disposed between the cathode of a photo-diode (PD) 21 and the minus input terminal of the comparator 41. The comparator operation adjustment resistor 43 is disposed between the plus terminal of a primary battery 271 and the minus input terminal of the comparator 41. The resistance voltage divider circuit 44 is constituted by a series connection of voltage dividing resistors 441 and 442. One end of the resistance voltage divider circuit 44 is connected to the plus terminal of the primary battery 271. The junction between the voltage division resistor 441 and the other voltage division resistor 442 is connected to the plus input terminal of the comparator 41.