Isolation Film for Alignment Mark Identification in Narrow-Bezel Displays

A light-shielding isolation film is introduced as an intermediary element positioned between the display panel and touch panel. This isolation film strategically blocks light paths that would otherwise cause signal lines to be visible during alignment mark identification, thereby eliminating the interference without requiring increased bezel width. The isolation film acts as a mediator that resolves the conflict between compact design and measurement accuracy.

The isolation film is applied selectively only in specific regions where signal line interference occurs during alignment mark identification, rather than uniformly across the entire display module. This localized approach maintains the narrow bezel design while precisely addressing the identification accuracy problem in the critical peripheral regions where alignment marks and signal lines overlap.

The light-shielding isolation film serves as a mediator that selectively blocks light reflected from or emitted by peripheral signal lines during the alignment mark identification process. By positioning the isolation film to cover signal line regions while leaving alignment mark regions exposed, the system maintains maximum display area utilization while ensuring clear distinction between alignment marks and signal lines during identification.

The isolation film utilizes optical properties (light shielding/blocking) to create a visual contrast difference between regions with alignment marks and regions with signal lines. This optical differentiation allows the identification device to distinguish alignment marks from signal lines even when their spatial projections overlap, thereby maintaining high display area while ensuring identification accuracy.

A light-shielding isolation film is introduced as a simple intermediary element that strategically blocks interfering light paths without requiring complex mechanical or optical systems. The isolation film can be implemented as a thin layer or coating, adding minimal structural complexity while effectively eliminating light interference that would otherwise prevent accurate alignment mark identification.

The isolation film is implemented as a thin, flexible light-shielding layer that can be easily integrated into the existing display module structure. This thin film approach minimizes added complexity and bulk while providing effective light blocking in the critical regions where signal lines interfere with alignment mark identification.