Disc Drive USB Interface Activation via Disc-In Switch
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing optical disc drives for automotive use face challenges in efficiently detecting disc insertion and activating USB interfaces over long distances, as standard ATA interfaces are not suitable for such configurations due to signal quality issues and the need for additional wiring, and USB interfaces alone lack necessary wiring for disc-in recognition functionality.
Innovation Solution
Incorporating a conversion unit, such as a central processing module with a PATA/SATA-USB bridge, to facilitate data communication between a USB interface and a drive controller with a SATA or PATA interface, enabling automatic activation of the USB interface upon disc insertion and deactivation upon ejection, using a disc-in switch to control power supply to the USB interface.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a USB interface is used for data communication between the disc drive and host over long distances, then signal quality and adaptability are improved, but the interface lacks necessary wiring for disc-in recognition functionality
Solution Approach 1:
The patent combines the disc-in switch functionality with the USB interface wiring by utilizing existing USB pins (specifically D+ or D-) to carry both data communication signals and disc-in detection signals. This merging eliminates the need for separate dedicated wiring for disc-in recognition while maintaining reliable signal quality over long distances through the USB interface's differential signaling capability.
Solution Approach 2:
The USB interface is designed to serve multiple functions simultaneously: data communication between host and disc drive, power supply to the disc drive, and disc-in recognition detection. By making the USB interface universal and multi-functional, the patent eliminates the need for separate dedicated wiring for each function, thereby reducing overall wiring complexity while maintaining signal reliability.
2Adaptability or versatility
If a disc switch is used to detect disc insertion, then disc-in recognition functionality is achieved, but additional wiring is required beyond the USB interface
Solution Approach 1:
The patent merges the disc-in switch detection circuit with the USB interface by connecting the disc-in switch to existing USB data pins. This integration allows the same wiring to serve both USB data communication and disc-in detection purposes, eliminating the need for additional separate wiring while maintaining full disc-in recognition functionality.
Solution Approach 2:
The disc-in switch acts as an intermediary component that translates the physical presence of a disc into an electrical signal that can be detected through the existing USB interface wiring. By using the USB data lines as the transmission medium for the disc-in signal, the patent avoids adding separate wiring while still achieving reliable disc-in recognition through the switch mechanism.
3Ease of operation
If the USB interface is always powered, then data communication is always available, but power consumption increases when disc is not inserted
Solution Approach 1:
The patent implements dynamic power management for the USB interface by enabling it only when a disc is detected through the disc-in switch. The USB interface transitions between powered and unpowered states based on real-time disc presence detection, optimizing power consumption while maintaining data communication availability whenever needed (i.e., when a disc is actually present and requires processing).
Solution Approach 2:
The disc-in switch provides continuous feedback about disc presence to the power control logic, which then adjusts the USB interface power state accordingly. When the switch detects disc insertion, it triggers USB interface activation; when disc is removed, it triggers USB interface deactivation. This feedback mechanism ensures the USB interface is powered only when necessary, reducing overall power consumption while maintaining operational readiness.
Data Source
AI summary
A disc drive may provide data communications to a host using a universal serial bus (“USB”) interface. Activation of the USB interface may be triggered upon insertion of a disc into the disc drive. A connection unit may activate the USB interface by providing power to the USB interface when a disc switch detects that the disc has been inserted into the disc drive. The connection unit may deactivate the USB interface by no longer providing power to the USB interface when the disc switch detects that the disc has been ejected or no longer is in the disc drive.