Semiconductor Device with Battery for Offline Data Display
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Solution Overview
Problem
Passive RF tags require constant proximity to a reader for power supply, making them inconvenient for large-scale measurements or high-frequency data monitoring, and they often cannot display data without continuous radio signal power.
Innovation Solution
A semiconductor device equipped with an antenna, battery, sensor, nonvolatile memory, and circuits that convert and store power, allowing it to operate and display data independently of a radio signal, using a lithium-ion battery and oxide semiconductor transistors for efficient power management and data storage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If a passive RF tag is used for measurement, then the device can operate without a battery, but a reader must always be positioned near the tag to supply power
Solution Approach 1:
The patent applies preliminary action by storing power in advance using a battery before it is needed. The semiconductor device includes a battery that stores electrical energy, allowing the device to operate independently without requiring a reader to be continuously positioned nearby to supply power through radio waves.
2Productivity
If a reader is always positioned near the tag to supply power, then the tag can operate, but it is inconvenient for large-scale measurements or high-frequency monitoring
Solution Approach 1:
The patent applies preliminary action by storing power in advance using a battery before it is needed. The semiconductor device includes a battery that stores electrical energy, allowing the device to operate independently without requiring a reader to be continuously positioned nearby to supply power through radio waves.
3Loss of information
If a display device is provided in the tag to show sensed data, then data can be displayed, but the display cannot be driven with power from radio signals alone
Solution Approach 1:
The patent applies preliminary action by storing power in advance using a battery before it is needed. The semiconductor device includes a battery that stores electrical energy, allowing the device to operate independently without requiring a reader to be continuously positioned nearby to supply power through radio waves.
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 continuous sensing and data storage without a radio signal, reducing power consumption and extending operation time, while allowing for efficient data acquisition and display in remote or hard-to-reach locations.
Implementation Method 1
Power supplied from the antenna is converted into first power via the first circuit
Implementation Method 2
The battery has a function of storing the first power and supplying second power
Data Source
AI summary
To provide a semiconductor device that is capable of displaying data even when a radio signal is not supplied. The semiconductor device includes an antenna, a battery, a sensor, a nonvolatile memory, a first circuit, and a second circuit. Power supplied from the antenna is converted into first power via the first circuit. The battery stores the first power and supplies second power. The sensor performs sensing with the second power. The nonvolatile memory stores analog data acquired by the sensor. The second power is used to store the analog data. The second circuit converts the analog data into digital data with the use of the first power. The nonvolatile memory preferably includes an oxide semiconductor transistor.