Touch Display Panel Compensation Wiring to Reduce Off-Screen Dark Lines
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Solution Overview
Problem
Existing touch display panels with a color filter layer experience dark lines under an off-screen state due to poor shading by the black matrix, causing reflective wiring to be visible.
Innovation Solution
Incorporating compensation wirings in the touch function layer of the first region with a wiring density ranging from 60% to 90%, matching the wiring densities of adjacent regions to minimize density differences and using a light blocking layer to enhance shading.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the first region is only provided with a black matrix of a color filter to shade the light, then the structure is simple, but the shading effect is worse than that of an ink or a polarizer, causing dark lines to be visible
Solution Approach 1:
The patent applies different wiring patterns and densities to different regions of the display. Specifically, the first region (bezel area) uses a different wiring arrangement compared to the display region, with adjusted wire spacing and orientation to optimize shading while maintaining electrical functionality. This local differentiation resolves the contradiction by tailoring the structure to specific regional requirements rather than using a uniform design throughout.
Solution Approach 2:
The patent modifies wiring parameters such as wire spacing, width, and orientation in the first region to improve shading effect. By changing these physical parameters of the touch function layer wiring, the reflection of ambient light is reduced, thereby improving the shading effect without requiring additional complex structures like ink or polarizers in that specific region.
2Object-affected harmful factors
If the wiring density of the touch function layer in the first region is adjusted to 60%-90%, then the dark lines are reduced, but the wiring design becomes more complex
Solution Approach 1:
The patent implements region-specific wiring density optimization where the first region (bezel area) has a controlled wiring density of 60%-90%, while other regions maintain their standard wiring configurations. This localized approach reduces dark lines in the critical bezel area without unnecessarily complicating the entire display structure, as only specific regions require the adjusted wiring density.
Solution Approach 2:
The patent applies wiring density optimization partially, focusing only on the first region where dark lines are most problematic. Rather than optimizing the entire display uniformly, the solution targets the specific area with excessive action (adjusted wiring density) only where needed, thereby reducing overall complexity while still achieving the desired effect of minimizing dark lines in the visible bezel region.
Data Source
AI summary
A touch display panel and a touch display device are provided, the touch display panel includes a substrate, a touch function layer and a color filter layer, the touch function layer includes first touch wirings and second touch wirings disposed on different layers, and a first region is provided with the first touch wirings and the second touch wirings, the color filter layer includes black matrixes disposed at intervals, the first region is covered by the black matrixes, the touch function layer is further provided with compensation wirings disposed on the first region, and a wiring density of the touch function layer in the first region is in a range of 60% to 90%.