Blu-ray Disc Player
Motivation
This project deals with an design optimization for noise reduction and durability improvement of feed unit inside blu-ray disc player traverse system. In the feed unit, position homing is done by overturning the feed drive rather than using a home sensor for cost reduction, which causes fair amount of unwanted noise. The purpose of this project is to reduce the noise by changing the shape of the feed unit without deteriorating positioning accuracy.
Fig1. Blu-ray Disc Player
Research Contents
- Dynamics modeling of movement system
- Analysis of phenomena about noise generation, wear, and overturning
- Modified design of feed unit
- Verification and optimization
Details
The key issues addressed by this study consist of the followings:
- Guide feed shape optimization for noise reduction of optical pickup movement system in blu-ray disc player
- Analysis of optical pickup movement systems
- Analysis and experiment of noise factor by overturning phenomena
- Guide feed shape optimization for noise reduction
- Optimization for nut-type of collimator lens movement unit inside the optical pick-up
- Case study for nut type CMU locking problem
- Main factor and solution
Fig2. Optical pickup traverse
Fig3. Guide feed
Fig4. Breakaway phenomenon between lead screw and guide feed ? movie clip
- Number of a screw thread
- Position of CMU stopper
- Effect of between nut and link spring
- Effect of fixing link spring