Polarizing Component Wave Plate Phase Delay for Display Color Deviation
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Solution Overview
Problem
Display panels, particularly OLED panels, experience color deviation and offset issues when viewed from different angles due to the micro-cavity effect, leading to uneven brightness attenuation of red, green, and blue sub-pixels, which affects the color gamut and front efficiency.
Innovation Solution
A polarizing component comprising a first polarizer, a wave plate layer with a phase delay portion and a light transmission portion, and a second polarizer, where the phase delay portion implements a phase delay on linearly polarized light in a direction different from its optical axis, creating elliptically or circularly polarized light, and the light transmission portion transmits light without phase delay, applied on the light-emergent side of sub-pixels to balance brightness attenuation across viewing angles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional display panel structure is used, then the device complexity is low, but color deviation occurs at different viewing angles
Solution Approach 1:
The wave plate layer is segmented into multiple functional regions: a first wave plate region with a first slow axis direction and a second wave plate region with a second slow axis direction. This segmentation allows different regions to control light polarization differently, correcting color deviation at various viewing angles while maintaining overall device functionality.
Solution Approach 2:
Different regions of the wave plate layer are assigned different optical properties (different slow axis directions) to address local viewing angle issues. The first wave plate region addresses specific viewing angles while the second wave plate region addresses other viewing angles, providing localized correction without affecting the entire display uniformly.
2Reliability
If the wave plate layer is added to correct color deviation, then color consistency improves, but the device complexity increases
Solution Approach 1:
The wave plate layer is integrated directly into the display panel structure between the pixel array and the color conversion layer, merging the color correction function with the existing display layers. This combining approach adds the necessary optical correction without requiring a completely separate system, thus improving color gamut while controlling overall device complexity.
3Reliability
If the phase delay portion delays light phase in directions different from the optical axis, then color deviation is reduced, but manufacturing precision requirements increase
Solution Approach 1:
The patent controls the slow axis directions of the wave plate regions and the thickness of the wave plate layer to achieve the desired phase delay effects. By adjusting these parameters (slow axis orientation angles and layer thickness), the patent optimizes brightness attenuation balance across different viewing angles while establishing achievable manufacturing specifications for phase delay alignment.
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 reduces color deviation by accelerating the brightness attenuation of specific sub-pixels, balancing the ratio of red, green, and blue light components, thus improving the color gamut and maintaining front efficiency without influencing cathode resistance.
Implementation Method 1
the phase delay portion is configured to delay a phase of the first linearly polarized light which is incident thereon in a direction different from a direction of an optical axis of the phase delay portion
Implementation Method 2
a first polarizer provided on a light-incident side of the polarizing component, and configured to polarize a light incident thereon into a first linearly polarized light
Implementation Method 3
a second polarizer provided on a surface of the wave plate layer facing away from the light-incident side, on a light-emergent side opposite to the light-incident side of the polarizing component, and configured to polarize a light incident thereon into a second linearly polarized light
Data Source
AI summary
A polarizing component and a display panel are provided in embodiments of the disclosure, the polarizing component comprising: a first polarizer on a light-incident side thereof, and configured to polarize a light incident thereon into a first linearly polarized light; a wave plate layer on a surface of the first polarizer facing away from the light-incident side; and a second polarizer on a surface of the wave plate layer facing away from the light-incident side, on a light-emergent side opposite to the light-incident side, and configured to polarize a light incident thereon into a second linearly polarized light; the wave plate layer comprises a phase delay portion configured to delay a phase of the first linearly polarized light incident thereon in a direction different from a direction of an optical axis of the phase delay portion such that a polarized light exiting the phase delay portion comprises a first polarized light in a first polarization direction and a second polarized light in a second polarization direction, without incurring any phase delay of the first linearly polarized light incident on the phase delay portion in a direction consistent with the direction of the optical axis of the phase delay portion.