Display Panel Step Compensation Layer Flatness
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Solution Overview
Problem
Display panels face challenges in achieving improved flatness and reduced external light reflectivity, particularly in the design of color filter layers and light-blocking regions, which affect image quality and visibility.
Innovation Solution
The display panel incorporates a first substrate with color filter layers and a light-blocking layer, along with a step compensation layer that covers the light-blocking region, ensuring uniform thickness and reduced external light reflectivity by using materials like carbon black particles and quantum dots for wavelength conversion, and arranging pixel regions in a specific pattern to prevent color mixing and optimize light transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a light-blocking layer is disposed on the light-blocking region to reduce external light reflectivity, then external light reflectivity is reduced, but the thickness difference between the light-blocking region and pixel regions increases causing poor flatness
Solution Approach 1:
A step compensation layer is introduced as an intermediary structure between the light-blocking layer and the pixel regions. This step compensation layer has a thickness that gradually changes from the light-blocking region toward the pixel regions, acting as a transition zone that compensates for the thickness difference and maintains overall flatness while preserving the light-blocking function.
Solution Approach 2:
The step compensation layer is selectively disposed only in the light-blocking region where thickness compensation is needed, rather than uniformly across the entire display panel. This localized approach maintains the light-blocking function in the light-blocking region while compensating for thickness differences only where necessary to preserve flatness.
2Measurement precision
If color filter layers are disposed to cover pixel regions for color control, then color accuracy is improved, but external light reflectivity increases affecting image quality
Solution Approach 1:
The display panel is segmented into distinct functional regions: pixel regions with color filter layers for color control, and light-blocking regions without color filter layers to minimize external light reflectivity. This segmentation allows each region to optimize its function without compromising the other.
Solution Approach 2:
Color filter layers are selectively disposed only in the pixel regions where color control is needed, while the light-blocking regions are left without color filter layers. This localized placement ensures color accuracy in display areas while reducing external light reflectivity in non-display areas.
3Shape
If the light-blocking region is designed to surround pixel regions for structure definition, then pixel structure is defined, but color mixing between adjacent pixel regions may occur
Solution Approach 1:
The step compensation layer acts as an intermediary barrier between adjacent pixel regions of different colors. Although primarily for thickness compensation, its presence in the light-blocking region between pixel regions provides an additional layer that helps prevent color mixing while maintaining the surrounding structure definition.
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 enhances the flatness and reduces external light reflectivity, leading to improved image quality and color accuracy by compensating for thickness differences and preventing color mixing between pixel regions.
Implementation Method 1
a step compensation layer disposed on one surface of the light-blocking layer and configured to cover at least a portion of the light-blocking region adjacent to the first pixel region
Implementation Method 2
a light blocking layer disposed on one surface of the first color filter layer and overlapping the light-blocking region in a plan view
Implementation Method 3
The color control layers may transmit only a portion of wavelength range of source light
Implementation Method 4
the color control layers may convert the color of the source light
Data Source
AI summary
Provided is a display panel in which a first pixel region, a second pixel region, a third pixel region, and a light-blocking region may be defined. The first substrate may include a base layer; a first color filter layer overlapping the light-blocking region and the first pixel region; a light blocking layer overlapping the light-blocking region; a second color filter layer overlapping the second pixel region; a third color filter layer overlapping the third pixel region; and a step compensation layer disposed on one surface of the light-blocking layer and configured to cover at least a portion of the light-blocking region adjacent to the first pixel region when viewed in a plane.