Multi-Thickness Light Transmitting Layer for Display Hue Uniformity
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Solution Overview
Problem
Display panels with stacked multilayer structures face significant hue differences due to thickness deviations in film layers during manufacturing, leading to inconsistent visual effects and potential rejection as mass-produced products.
Innovation Solution
Incorporating a light transmitting layer with at least two sub-regions of different thicknesses, where the phase differences of light reflected from each surface counteract each other, maintaining a neutral hue by controlling the thicknesses of the first and second sub-regions such that 0.5π≤|Δ1−Δ2≤1.5π, thereby reducing hue differences between samples.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the film layer thickness is controlled during manufacturing, then the manufacturing precision is improved, but the device complexity increases due to the need for multi-thickness sub-regions
Solution Approach 1:
The light transmitting layer is divided into multiple sub-regions (first sub-regions and second sub-regions) with different thicknesses. Each sub-region is designed to produce specific phase differences for reflected light, allowing the system to compensate for manufacturing variations through the combined optical effect of segmented regions rather than requiring precise control of the entire layer.
Solution Approach 2:
Different sub-regions of the light transmitting layer are assigned different thickness characteristics tailored to their specific optical functions. The first sub-regions have one thickness range while the second sub-regions have another thickness range, allowing each local area to contribute differently to the overall neutral hue effect and compensate for manufacturing variations in a localized manner.
2Ease of manufacture
If the thickness of film layers varies during manufacturing, then the ease of manufacture is improved, but the hue uniformity deteriorates causing large hue differences between samples
Solution Approach 1:
The invention converts the harmful effect of thickness variations into a beneficial compensation mechanism. By designing specific multi-thickness sub-region patterns, the system allows manufacturing variations to occur while the distributed phase differences from different sub-regions collectively compensate for these variations, maintaining neutral hue and converting what would be a defect into a self-correcting feature.
Solution Approach 2:
The invention changes the thickness parameter of the light transmitting layer across different sub-regions rather than maintaining a uniform thickness. This parameter variation creates different phase differences for reflected light in different areas, and the statistical distribution of these variations across multiple sub-regions compensates for manufacturing inconsistencies, maintaining overall hue uniformity despite thickness variations.
3Stability of the object's composition
If multi-thickness sub-regions are implemented in the light transmitting layer, then the hue uniformity is improved, but the manufacturing precision requirements increase
Solution Approach 1:
The light transmitting layer is divided into multiple sub-regions (first sub-regions and second sub-regions) with different thicknesses. Each sub-region is designed to produce specific phase differences for reflected light, allowing the system to compensate for manufacturing variations through the combined optical effect of segmented regions rather than requiring precise control of the entire layer.
4Device complexity
If the light transmitting layer has uniform thickness, then the device complexity is reduced, but the visual effect deteriorates due to hue differences in mass-produced products
Solution Approach 1:
Different sub-regions of the light transmitting layer are assigned different thickness characteristics tailored to their specific optical functions. The first sub-regions have one thickness range while the second sub-regions have another thickness range, allowing each local area to contribute differently to the overall neutral hue effect and compensate for manufacturing variations in a localized manner.
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 alleviates hue nonuniformity caused by thickness inconformity in film layers, ensuring consistent neutral hues across different display panel samples, thus improving the visual effect and manufacturability.
Implementation Method 1
a phase difference between light reflected by the first surface and light reflected by the second surface is Δ1, and a phase difference between light reflected by the third surface and light reflected by the fourth surface is Δ2
Implementation Method 2
For visible light having a wavelength λ0 directed to the display panel, a phase difference between light reflected by the first surface and light reflected by the second surface is Δ1
Data Source
AI summary
A display panel includes at least one light transmitting layer, which includes at least one first sub-region and at least one second sub-region. A thickness of the first sub-region is different from a thickness of the second sub-region; the first sub-region includes a first surface proximate to a display surface of the display panel and a second surface facing away from the display surface of the display panel, and the second sub-region includes a third surface proximate to the display surface of the display panel and a fourth surface facing away from the display surface of the display panel; and for visible light, a phase difference between light reflected by the first surface and light reflected by the second surface is Δ1, and a phase difference between light reflected by the third surface and light reflected by the fourth surface is Δ2, where 0.5π≤|Δ1−Δ2|≤1.5π.