Integrated Stylus Wireless Charging Circuit for Higher Link Efficiency
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing wireless charging products suffer from low charging efficiency and temperature rise issues during the charging process.
Innovation Solution
A wireless charging circuit and system that integrates a chip with a rectifier, charger unit, and micro-control unit, including a voltage-stabilizing charging circuit, boost charging circuit, or switched capacitor charging circuit, to shorten the charging link and improve efficiency by designing the RX chip and charger chip as one component, directly outputting energy to the battery.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the wireless charging link uses separate RX chip and charger chip designs, then the system has modular flexibility, but the charging efficiency is low and temperature rise occurs
Solution Approach 1:
The patent merges the RX chip and charger chip into a single integrated chip that performs both functions. The chip includes a rectifier configured to rectify an input alternating current signal into a direct current signal, and a charger unit configured to charge a battery by using the direct current signal from the rectifier. This integration eliminates the need for separate chips and reduces the number of external connections, thereby shortening the wireless charging link and improving charging efficiency while reducing temperature rise.
2Adaptability or versatility
If multiple separate chips are used in the wireless charging system, then the system has functional separation, but the charging link becomes longer and efficiency decreases
Solution Approach 1:
The patent combines multiple functional blocks (rectifier, charger unit, micro-control unit, and protocol encoding/decoding unit) into a single integrated chip. This merger maintains all necessary functions while eliminating the need for multiple separate chips and their associated external connections, thereby shortening the wireless charging link and improving charging efficiency.
3Device complexity
If the wireless charging link is long and complex, then the system has multiple functional blocks, but the link efficiency is low and temperature rises
Solution Approach 1:
The patent integrates multiple functional blocks (rectifier, charger unit, micro-control unit, and protocol encoding/decoding unit) into a single chip with minimized internal connections. This integration dramatically reduces the number of external connections required (only power input, battery output, and communication interfaces), thereby shortening the wireless charging link and improving link efficiency while reducing temperature rise.
4Ease of manufacture
If separate RX chip and charger chip are used, then the system has design flexibility, but the charging process has unnecessary steps
Solution Approach 1:
The patent merges the RX chip and charger chip into a single integrated chip that performs both functions simultaneously. The chip includes a rectifier configured to rectify an input alternating current signal into a direct current signal, and a charger unit configured to charge a battery by using the direct current signal from the rectifier. This integration eliminates unnecessary intermediate steps in the charging process, such as separate rectification and charging operations, thereby reducing charging time and improving efficiency.
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 design enhances charging efficiency, reduces temperature rise, and improves overall link efficiency by eliminating unnecessary steps in the charging process.
Implementation Method 1
the first coil is configured to be coupled to the second coil to obtain an alternating current signal
Implementation Method 2
the rectifier is configured to rectify an input alternating current signal into a direct current signal
Data Source
Figure 1
Figure 2A
Figure 2B
AI summary
Embodiments of this application provide a wireless charging system, a chip, and a wireless charging circuit and relate to the field of wireless charging technologies. The wireless charging system includes an electronic device and a stylus, where the electronic device is configured to wirelessly charge the stylus; and the stylus includes a wireless charging circuit. The wireless charging circuit includes a first coil, a chip, and a first battery, where the first coil is configured to be coupled to the second coil to obtain an alternating current signal, and the chip includes a rectifier, a charger unit, a micro-control unit, and a protocol encoding/decoding unit. The charger unit includes a voltage-stabilizing charging circuit, a boost charging circuit, or a switched capacitor charging circuit; and the charger unit is configured to charge the first battery by using the direct current signal from the rectifier. In this way, for the stylus, energy is coupled from the coil, passes through the chip, and then is directly output to a battery of the stylus, thereby shortening a wireless charging link and improving link efficiency.