Touch Display Insulating Layer Inclination Angle Optimization
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Solution Overview
Problem
Touch routing line defects in touch display devices can lead to short circuits during the arrangement process, affecting the performance of touch sensing without compromising image display.
Innovation Solution
A touch display device configuration with a planarization layer having varying angles of inclination for its side surfaces, where the angle facing the pad area is less for touch routing lines and more for display signal lines, and a touch insulating layer with specific surface areas to prevent short circuits between touch routing lines.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the touch routing line is arranged in the display panel, then touch sensing function is enabled, but short circuit defects may occur during the arrangement process
Solution Approach 1:
A planarization layer is introduced as an intermediary structure between the touch routing line and the underlying layers. This planarization layer has a controlled inclination angle that prevents direct contact between the touch routing line and other conductive elements, thereby eliminating the short circuit defect while preserving the touch sensing function.
Solution Approach 2:
The planarization layer is designed with varying inclination angles at different locations: a first inclination angle in the pad area and a second inclination angle in the active area. This local differentiation allows the structure to prevent short circuits in the pad area while maintaining proper electrical connection and touch sensitivity in the active area.
2Reliability
If the planarization layer inclination angle is increased to prevent short circuits, then reliability improves, but manufacturing precision requirements increase
Solution Approach 1:
The patent specifies particular ranges for the inclination angles of the planarization layer (first inclination angle and second inclination angle) to optimize both short circuit prevention and manufacturing feasibility. By defining these parameter ranges, the invention balances reliability improvement with manageable manufacturing precision requirements.
Data Source
AI summary
A touch display device is disclosed. By making at least one of a thickness or an angle of inclination of an insulating layer disposed on an area where a touch routing line is disposed on a non-active area of a display panel and an area that lacks the touch routing line to be different from each other, a short circuit between touch routing lines due to a defect in a process arranging the touch routing lines can be reduced.