Display Substrate Light Regulation Layer for View-Angle Color Shift
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Solution Overview
Problem
OLED display substrates suffer from view angle color shift due to interference effects from the microcavity effect, leading to abnormal color perception at non-zero angles.
Innovation Solution
A display substrate with a light regulation layer positioned at the light exiting side of the display structure layer, which adjusts the emergent direction of light using light regulation portions to control brightness ratios of different colors, thereby mitigating view angle color shift.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a conventional OLED display structure is used, then the display achieves basic light emission and color output, but view angle color shift occurs due to microcavity interference effects
Solution Approach 1:
A light regulation layer is introduced as an intermediary component between the display structure layer and the external environment. This layer contains light regulation portions that selectively adjust the emergent directions of different colors of light, serving as a mediator to correct the microcavity interference effects and achieve consistent color perception across different viewing angles
Solution Approach 2:
The light regulation layer employs light regulation portions with spatially varying properties - different regions of the layer have different optical characteristics tailored to regulate specific color channels (red, green, blue) differently. This local differentiation allows precise control over the emergent light directions for each color to compensate for view-angle dependent color shifts
2Illumination intensity
If the light regulation layer is positioned at the light exiting side, then color purity is improved, but the device structure becomes more complex
Solution Approach 1:
The light regulation layer is designed to perform multiple functions simultaneously: it regulates the emergent directions of different colors of light, controls brightness ratios, and compensates for microcavity interference effects. By consolidating these functions into a single layer positioned at the light exiting side, the patent avoids adding multiple separate components that would increase structural complexity
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 light regulation layer effectively adjusts light paths to improve color purity and brightness uniformity across various viewing angles, reducing color shifts and enhancing image quality.
Implementation Method 1
The light regulation layer is configured to adjust an emergent direction of light of at least one color emitted from the display structure layer
Data Source
AI summary
A display substrate includes an underlaying substrate, a display structure layer arranged on the underlaying substrate, and a light regulation layer arranged at a light exiting side of the display structure layer. The display structure layer includes multiple sub-pixels. An orthographic projection of the light regulation layer on the underlaying substrate does not overlap with opening regions of the multiple sub-pixels. The light regulation layer is configured to adjust an emergent direction of light of at least one color emitted from the display structure layer.