Touch Display Panel Antireflection and Passivation Layer Overlap
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
There is a need for a touch display panel that can improve product yield and product reliability while reducing manufacturing cost, particularly in integrating a touch sensor within the display panel.
Innovation Solution
The touch display panel includes a display unit with an active area and a bezel area, an encapsulation unit to seal the pixels, a touch sensor unit with touch sensors and a touch passivation layer, and an antireflection unit that includes a black matrix and a color filter, which are carefully designed to overlap specific areas without overlapping the pad area, thereby reducing manufacturing costs and improving reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the antireflection unit and touch passivation layer are designed to overlap the active area and bezel area but not the pad area, then product yield and reliability are improved, but manufacturing complexity increases due to precise area alignment requirements
Solution Approach 1:
The patent divides the coverage area into distinct zones: the antireflection unit covers the active area and part of the bezel area, while the touch passivation layer extends to cover the pad area. This segmentation allows each layer to be optimized for its specific function without interfering with critical pad areas, thereby improving reliability while managing manufacturing complexity through defined spatial boundaries.
Solution Approach 2:
Different regions of the display panel are assigned different protective qualities: the active area receives both antireflection and passivation coverage for optimal performance, the bezel area receives selective coverage, and the pad area is excluded from antireflection coverage to prevent manufacturing defects. This local differentiation improves overall reliability while allowing standardized manufacturing processes for each zone.
2Ease of manufacture
If the touch sensor is integrated within the display panel instead of being a separate touch panel, then manufacturing cost is reduced and device complexity is simplified, but product yield and reliability may be compromised
Solution Approach 1:
The patent integrates the touch sensor unit with the display panel by positioning it on the encapsulation unit that seals the pixels. The touch sensors are arranged to correspond with the active area, and the combined structure is protected by coordinated antireflection and passivation layers. This merging reduces manufacturing cost and device complexity while the specialized layer design maintains product reliability.
Solution Approach 2:
The encapsulation unit serves multiple functions: it seals the pixels of the display panel and simultaneously provides a mounting substrate for the touch sensor unit. This multi-functionality integrates two separate components into one, reducing overall manufacturing cost and device complexity while maintaining the reliability of both the display and touch functions through the protective layer design.
3Manufacturing precision
If the overlapping area of the antireflection unit and touch passivation layer is precisely controlled in the bezel area, then manufacturing precision is improved, but manufacturing cost increases
Solution Approach 1:
The patent designs the antireflection unit and touch passivation layer with pre-defined overlapping regions in the bezel area that are calculated to be equal. This preliminary design approach allows manufacturers to use standardized alignment procedures without requiring complex real-time adjustments, thereby achieving high manufacturing precision while controlling costs through process standardization.
Data Source
AI summary
A touch display panel for improving product yield and product reliability and reducing manufacturing cost includes a touch sensor unit disposed on an encapsulation unit, the touch sensor unit including a plurality of touch sensors corresponding to an active area and a touch passivation layer on the plurality of touch sensors, and an antireflection unit disposed on the touch sensor unit, the antireflection unit at least including a black matrix disposed in non-emissive areas of the active area and a bezel area, wherein the antireflection unit and the touch passivation layer overlap the active area and the bezel area and do not overlap at least a pad area of the bezel area, and, in the bezel area, the overlapping area of the antireflection unit is equal to the overlapping area of the touch passivation layer.