Non-contact IC Card Display Power Management via Magnetic Field Detection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Non-contact IC cards with display functions experience increased power consumption due to unnecessary updating of display contents, which reduces the battery's driving time.
Innovation Solution
An information processing apparatus and method that includes receiving, storage, detecting, condition determining, switching control, and reading means to manage the connection of storage and reading sections based on magnetic field variations, preventing unnecessary updates by controlling the electronic switch to disconnect the storage from the antenna when updates are detected.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If display contents are updated at arbitrary timing in accordance with user operation, then display convenience is improved, but power consumption increases due to unnecessary updating processes
Solution Approach 1:
The patent implements dynamic switching between two operational modes: a first mode where the display is continuously updated with latest information from the IC chip, and a second mode where the display shows cached information without continuous updates. The system dynamically transitions between these modes based on detected user operations (such as card insertion/detachment or button presses), allowing the display to be updated only when necessary. This dynamic approach resolves the contradiction by enabling convenient display updates on demand while avoiding unnecessary power consumption during periods when updates are not needed.
2Productivity
If the storage section is continuously connected to the reading section, then display information can be updated frequently, but power consumption increases
Solution Approach 1:
The patent implements periodic action by enabling the storage section to be connected to the reading section only during specific periods or intervals when updates are actually needed, rather than maintaining continuous connection. The system uses detected user operations as triggers to initiate update cycles, and the display shows cached information during intervals between updates. This periodic connection approach allows the system to maintain the capability for frequent updates when needed while significantly reducing power consumption during non-update periods.
3Measurement precision
If the display is updated with latest information from memory, then information accuracy is improved, but unnecessary updating processes increase power consumption
Solution Approach 1:
The patent applies preliminary action by pre-fetching and caching information from the IC chip memory into the display's internal storage during periods when updates are appropriate (such as when the card is inserted or during idle periods). Once information is cached, the display can show this pre-loaded information without requiring continuous connection to the IC chip or repeated reading operations. This preliminary action ensures information accuracy is maintained while avoiding the energy waste of continuous updating processes.
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 effectively prevents power consumption increases by minimizing unnecessary updates, extending battery life and enhancing the convenience of the device by reducing the frequency of battery replacement or recharge.
Implementation Method 1
an antenna that receives a magnetic field signal transmitted from another device
Implementation Method 2
a magnetic field sensor that detects a magnetic field variation which has occurred in the vicinity of the antenna
Data Source
AI summary
An information processing method includes the steps of: detecting a magnetic field variation that occurs in the vicinity of a receiving section that receives a magnetic field signal; determining whether or not a detection result satisfies a predetermined condition that is set in advance; connecting a storage section, which stores information included in the magnetic field signal received by the receiving section, to the receiving section if it is determined that the detection result does not satisfy the condition; and connecting the storage section to a reading section that reads information stored on the storage section, if it is determined that the detection result satisfies the condition.