LCOS Panel Module Adhesive FPC Opening for Assembly Tolerance
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Solution Overview
Problem
Large LCD devices above 30 inches face production cost issues, and existing LCOS panel modules lack a package structure, leading to exposure to the environment and assembly tolerance problems.
Innovation Solution
An LCOS panel module with a face mask that frames the display region, exposing it precisely through a display opening, while being fixed to the substrate with adhesive and connected via bonding wires, and optionally using protection glue and materials like aluminum or steel for structural support.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a conventional LCOS module without package structure is used, then the production cost is reduced, but the module is exposed to environmental factors and assembly tolerance problems occur
Solution Approach 1:
The patent applies a face mask structure that acts as a protective shell over the LCOS panel. The face mask is positioned close to the panel surface and secured with adhesive, creating a protective enclosure without requiring a complete rigid package structure. This flexible protection approach shields the display region from environmental factors while maintaining manufacturing simplicity and cost-effectiveness.
2Ease of manufacture
If the face mask is positioned without precise alignment features, then the manufacturing process is simplified, but the display region cannot be exposed exactly through the display opening
Solution Approach 1:
The patent incorporates positioning holes in the face mask that align with positioning marks on the LCOS panel before the final adhesive bonding step. This preliminary alignment action ensures precise positioning of the display region relative to the display opening, while the overall manufacturing process remains simple and does not require complex alignment machinery.
3Reliability
If the face mask covers the entire LCOS panel, then environmental protection is maximized, but the display region cannot be accessed for light transmission
Solution Approach 1:
The face mask is segmented with a display opening that exposes the display region of the LCOS panel. This segmentation allows light to pass through to the liquid crystal display area while the surrounding portions of the face mask remain in place to provide environmental protection. The opening is precisely positioned and sized to match the display region boundaries.
4Strength
If adhesive is applied over the entire substrate surface, then bonding strength is maximized, but the FPC cannot be electrically connected to the LCOS panel
Solution Approach 1:
An opening is created in the FPC substrate at the location where electrical connection to the LCOS panel is required. This extraction of material from the FPC allows bonding wires or conductive elements to pass through the opening and establish electrical connections with the LCOS panel underlying structure, while adhesive is applied to surrounding areas to provide mechanical bonding strength without blocking the electrical connection path.
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
Resolves assembly tolerance issues and reduces production costs by providing a robust and cost-effective LCOS panel module with improved light shielding and structural integrity, suitable for larger display sizes.
Implementation Method 1
The bottom surface of the LCOS panel is fixed on the adhesive region of the substrate exposed from the opening through an adhesive layer
Implementation Method 2
the face mask is disposed on the LCOS panel and has a display opening... Resolves assembly tolerance issues and reduces production costs by providing a robust and cost-effective LCOS panel module with improved light shielding
Data Source
AI summary
An LCOS panel module including a substrate, a flexible printed circuit (FPC), an LCOS panel, and a face mask is provided. The substrate has an adhesive region on a surface thereof. The FPC is disposed on the substrate and has an opening for exposing the adhesive region. The LCOS panel has a bottom surface and a top surface. The bottom surface of the LCOS panel is fixed on the adhesive region of the substrate exposed from the opening through an adhesive layer and is electrically connected to the FPC. The face mask used for framing the display region of the LCOS panel and sheltering from stray light is disposed on the LCOS panel and has a display opening. A display region of the top surface of the LCOS panel is exposed from the display opening of the face mask.