Optical Pickup Flexible Wiring Board Segmentation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The existing optical pickup devices face challenges in reducing the number of wiring lines, leading to resource waste, increased materials cost, and difficulties in re-adjustment and defective product analysis, due to the need for cutting unnecessary wiring lines during production.
Innovation Solution
The implementation of a flexible printed wiring board with a connector section that connects only the necessary wiring lines to the control section, allowing for broader wiring pitches and preventing signal deterioration, while enabling easy attachment and detachment for adjustments and re-adjustments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If wiring lines are cut during production to reduce the number of signal lines, then the number of wiring lines is reduced, but resource waste and increased materials cost occur
Solution Approach 1:
The flexible printed wiring board is divided into two distinct regions: a first region with a first pitch for general signal transmission and a second region with a second pitch (broader than the first) for adjustment purposes. This segmentation allows the adjustment wiring lines to be separated from the main signal wiring lines, enabling selective usage during production and operation phases without wasting resources on permanently retained adjustment infrastructure.
Solution Approach 2:
The patent implements a dynamic configuration where the flexible printed wiring board can be detached and reattached. During production, the board is attached to enable adjustment operations. After adjustment, the board can be detached to remove the adjustment circuit, transforming the system from a static to a dynamic configuration that adapts to different operational needs.
2Device complexity
If wiring lines are cut during production, then the number of wiring lines is reduced, but difficulties in re-adjustment and defective product analysis occur
Solution Approach 1:
The flexible printed wiring board is designed to be detachably connected to the optical pickup device, allowing it to be attached during production for adjustment operations and then detached after use. This dynamic connection enables the same board to be reused for subsequent adjustment operations or defective product analysis without requiring permanent wiring modifications, thus maintaining re-adjustment capability while reducing the number of wiring lines.
Solution Approach 2:
The adjustment circuit connected through the flexible printed wiring board is designed to be discarded after use, while the board itself can be recovered and reused. This allows the adjustment functionality to be temporarily removed after production adjustments are complete, but the infrastructure remains available for future adjustment needs or defect analysis.
3Adaptability or versatility
If multiple semiconductor laser elements and photodetectors are mounted to support multiple formats, then format versatility is improved, but the number of circuit wiring lines increases
Solution Approach 1:
The flexible printed wiring board segments the wiring into two distinct pitch regions: the first region handles the complex signal transmission for multiple laser elements and photodetectors, while the second region with broader pitch handles adjustment signals. This segmentation allows the versatile format support functionality to be maintained through the first region while the second region provides a simplified wiring structure for adjustment purposes.
Solution Approach 2:
The flexible printed wiring board acts as an intermediary between the optical pickup device components and the control circuit board. By providing a standardized interface with distinct pitch regions, it mediates the complex connections required for multiple formats while simplifying the overall wiring architecture through its detachable nature and organized signal routing.
Data Source
AI summary
An optical disk apparatus according to the present invention includes an optical pickup device and a control section for controlling an operation of the optical pickup device. The optical pickup device includes a plurality of first wiring lines for transmitting signals from the control section, a second wiring line to be used for an adjustment of the optical pickup device, and a connector section which is electrically connected to the first wiring lines. The optical disk apparatus further includes a flexible printed wiring board (FPC) which is connected to the connector section for electrically connecting the first wiring lines to the control section. The FPC includes a plurality of third wiring line for electrically connecting the first wiring lines to the control section, such that a pitch of the plurality of third wiring lines in a central portion of the FPC is broader than a pitch of the plurality of third wiring lines in a region of the FPC adjoining the connector section. Moreover, the connector section is electrically connected to the second wiring line, and the FPC being connected to the connector section electrically connects the first wiring lines to the control section, but does not electrically connect the second wiring line to the control section.