Display Panel Signal Line Layout for White-Light Reflection
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Solution Overview
Problem
Capacitive touch screen technologies in displays cause chromatic aberration, dark-state light leakage, and contrast reduction at side and front viewing angles due to the configuration of touch signal lines in the pixel-array layer.
Innovation Solution
A display panel design with specific configurations of signal lines and color resists that avoid chromatic aberration and light leakage by distributing signal lines in regions with different color resists, reducing their density and ensuring reflections form white light at side viewing angles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If touch signal lines are configured in the pixel-array layer, then capacitive touch screen functionality is achieved, but chromatic aberration and dark-state light leakage occur at side viewing angles
Solution Approach 1:
The signal lines are segmented into different types (first, second, third signal lines) positioned at different locations within the pixel array. Each segment is strategically placed to minimize its harmful optical effects while maintaining touch functionality.
Solution Approach 2:
Different regions of the pixel array are assigned different signal line configurations. The signal lines are positioned at specific local locations (e.g., at borders between color resists of different colors) to optimize local optical properties while maintaining overall touch screen functionality.
2Measurement precision
If signal line density is increased to improve touch sensitivity, then touch detection capability is enhanced, but contrast reduction occurs at front and side viewing angles
Solution Approach 1:
The signal lines are positioned at specific local regions within each pixel unit (at the borders between color resists) rather than being uniformly distributed. This localized positioning reduces the overall density of signal lines across the display while maintaining sufficient touch detection capability at critical locations.
3Manufacturing precision
If signal lines are positioned at color resist borders to reduce chromatic aberration, then color accuracy at side angles is improved, but signal line density increases causing contrast reduction
Solution Approach 1:
The signal line configuration is segmented into three distinct types positioned at different color resist borders (first signal lines at red-green borders, second signal lines at green-blue borders, third signal lines at blue-red borders). This segmentation allows each signal line type to be optimized for its specific location, reducing overall density while maintaining color accuracy.
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 solution effectively prevents chromatic aberration and enhances contrast by ensuring reflections form white light, reducing signal line density to mitigate dark-state light leakage and contrast reduction.
Implementation Method 1
ensuring reflections form white light at side viewing angles
Data Source
AI summary
A display panel including a first substrate, a pixel-array layer, and a color-resist layer is disclosed. The pixel-array layer includes multiple first signal lines, multiple second signal lines, and multiple third signal lines. Each of the first signal lines corresponds to a common border between multiple first color resists and multiple second color resists. Each of the second signal lines corresponds to a common border between multiple third color resists and multiple first color resists. Each of the third signal lines corresponds to a common border between multiple second color resists and multiple third color resists. Reflected light coming from the first signal lines, reflected light coming from the second signal lines, and reflected light coming from the third signal lines are mixed to form white light.