Stacked Touch Panel Antennas for Uniform Pixel Brightness
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional electromagnetic induction touch display panels suffer from uneven brightness and degraded display performance due to antenna offset issues, causing the mura phenomenon.
Innovation Solution
The touch display panel incorporates two stacked and insulated antenna layers with antenna groups arranged at gaps between pixel units, where the extending directions of antennas in each layer are perpendicular to each other, ensuring uniform aperture ratios and eliminating differences in pixel unit brightness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of stationary object
If antennas are integrated into the display panel to reduce thickness, then the panel thickness is reduced, but antenna offset causes uneven brightness and degraded display performance
Solution Approach 1:
The patent transitions from a single-plane antenna layout to a three-dimensional stacked configuration with two antenna layers positioned at different heights. The first antenna layer includes antennas extending in a first direction, while the second antenna layer includes antennas extending in a second direction perpendicular to the first direction, creating spatial separation that resolves offset issues
Solution Approach 2:
The patent implements a nested structure where the second antenna layer is positioned above the first antenna layer, with both layers integrated within the display panel structure. The antenna groups are nested between pixel units, with connecting wires and peripheral wirings arranged in the non-display area, creating a compact multi-layer configuration
2Ease of manufacture
If antennas are distributed in gaps between pixels, then antenna integration is achieved, but antenna offset creates differences in aperture ratios between pixels
Solution Approach 1:
The patent applies different spatial arrangements to different antenna layers: the first antenna layer has antennas extending in a first direction arranged in a first pattern, while the second antenna layer has antennas extending in a second direction perpendicular to the first direction arranged in a second pattern. This localized differentiation in arrangement patterns ensures that antenna offset does not create systematic aperture ratio variations
Solution Approach 2:
The patent creates a composite antenna structure combining two orthogonal antenna layers with different extending directions. The first antenna group and second antenna group are stacked and insulated from each other, forming a composite electromagnetic induction system that maintains uniform aperture ratios across pixels even when offset occurs
3Device complexity
If a single antenna layer is used, then device complexity is reduced, but display uniformity deteriorates due to antenna offset
Solution Approach 1:
The patent adds the vertical dimension by stacking two antenna layers at different heights within the panel. The first antenna layer is positioned at a first height with antennas extending in a first direction, while the second antenna layer is positioned at a second height with antennas extending in a second direction perpendicular to the first direction, utilizing three-dimensional space to resolve offset issues
Solution Approach 2:
The patent designs the antenna system to perform multiple functions: the first antenna layer and second antenna layer both contribute to electromagnetic induction touch detection, with their orthogonal arrangements providing complementary coverage. This multi-functional stacked configuration maintains display uniformity while enabling integrated touch functionality
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
This configuration effectively avoids the mura phenomenon, improving display performance by ensuring consistent aperture ratios and precise touch interactions across the panel.
Implementation Method 1
electromagnetic induction touch technology is a technology that uses an electromagnetic pen to emit electromagnetic signals and interact with an electromagnetic induction board behind a touch screen
Data Source
AI summary
A touch display panel has a display area and a non-display area and includes pixel units located in the display area and two antenna layers. The pixel units are arranged in an array, and the two antennas are stacked and insulated from each other. Each antenna layer includes a plurality of antenna groups, and each of gaps between adjacent pixel units is provided with an antenna group. Extending directions of the antennas in each antenna layer are same and extending directions of the antennas in the two antenna layers are perpendicular to each other.