Staggered Conductive and Optical Compensation Patterns for Touch Displays
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Solution Overview
Problem
Conductive patterns in touch display devices cause visual disturbances due to thickness and refractive index differences, leading to edge visibility and moiré interference, affecting the display's effectiveness.
Innovation Solution
A conductive substrate with staggered conductive patterns and optical compensation patterns, featuring conductive protrusions and optical compensation protrusions, reduces refraction and scattering effects, blurring the edges of the conductive patterns and enhancing the visual effect.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If conductive patterns are disposed on the substrate to enable touch function, then the touch input function is achieved, but the edges of the conductive patterns are visible and cause visual disturbances
Solution Approach 1:
The patent introduces optical compensation patterns as an intermediary element between the conductive patterns and the viewer's eye. These optical compensation patterns have refractive indices and thicknesses designed to compensate for the optical disturbances caused by the conductive patterns, thereby reducing edge visibility and visual disturbances while maintaining the touch function.
Solution Approach 2:
The patent changes the optical parameters (refractive index and thickness) of the layers between the conductive patterns and the substrate. By adjusting these parameters, the optical compensation patterns effectively blur the edges of the conductive patterns and reduce the harmful visual effects, while the conductive patterns themselves maintain their electrical conductivity for touch sensing.
2Ease of operation
If conductive patterns are disposed apart on the substrate, then the touch sensing function is enabled, but different transmittances are caused by thickness and refractive index differences
Solution Approach 1:
The optical compensation patterns serve as an intermediary layer that uniformizes the light transmission path. By introducing this intermediate layer with specific optical properties, the patent compensates for the thickness and refractive index differences between regions with and without conductive patterns, thereby achieving more uniform transmittance across the display.
Solution Approach 2:
The patent modifies the optical parameters of the intermediate layers to compensate for variations in light transmission. By carefully selecting and adjusting the refractive index and thickness of the optical compensation patterns, the patent achieves uniform transmittance across different regions of the display, eliminating the harmful visual effects of non-uniform lighting.
3Ease of manufacture
If rectangular conductive patterns are used, then the manufacturing process is simplified, but moiré interference is easily caused
Solution Approach 1:
The optical compensation patterns act as a mediator that prevents moiré interference from occurring. By introducing this intermediate layer with specific optical properties, the patent disrupts the formation of moiré patterns that would otherwise result from the interaction between the rectangular conductive patterns and the pixel structures, thereby eliminating the harmful visual effect while maintaining manufacturing simplicity.
Solution Approach 2:
The patent changes the optical parameters of the intermediate layers to prevent moiré interference. By adjusting the refractive index and thickness of the optical compensation patterns, the patent alters the optical path and phase relationships between light waves, thereby preventing the formation of moiré patterns while keeping the rectangular conductive pattern design simple and easy to manufacture.
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
The staggered disposition of conductive and optical compensation patterns effectively blurs the edges of the conductive patterns, improving the visual appearance of touch display devices by minimizing refraction and scattering effects, thus enhancing the overall visual effect.
Implementation Method 1
different transmittances are caused by the thickness difference and refractive index difference between the portion with the first conductive patterns and the portion without the first conductive patterns
Implementation Method 2
the edge scattering effect
Data Source
AI summary
A conductive substrate comprises a substrate, a plurality of conductive patterns, and a plurality of optical compensation patterns. The conductive patterns extend along a first direction and are sequentially disposed on the substrate along a second direction. The optical compensation patterns are staggered from the conductive patterns along the second direction on the substrate. An edge of at least one of the conductive patterns extending along the first direction has a plurality of conductive protrusions, and an edge of at least one of the optical compensation patterns extending along the first direction has a plurality of optical compensation protrusions. A touch display device is also disclosed.