Quantum Dot Display Panel Structure for Lower Light Crosstalk
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing display products using quantum dot color conversion layers face performance issues that need to be improved, particularly in terms of process efficiency and light utilization.
Innovation Solution
A display panel design incorporating a supporting substrate with an isolation portion, a filter layer, a light conversion layer, and a light-shielding portion, where the isolation portion is made of the same material as the filter units and is formed simultaneously, and the light-shielding portion prevents light crosstalk by directing converted light in the thickness direction of the substrate.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a quantum dot color conversion layer is used to achieve high color gamut display, then luminescence color purity and material stability are improved, but process performance needs to be improved
Solution Approach 1:
The patent segments the color conversion layer into multiple layers (first color conversion layer and second color conversion layer) with different quantum dot materials. The first layer contains quantum dots emitting in the 500-550nm range, while the second layer contains quantum dots emitting in the 450-500nm range. This segmentation allows each layer to be optimized for specific wavelength ranges, improving overall color gamut and luminous efficiency while maintaining manufacturability through standardized layer-by-layer fabrication processes.
Solution Approach 2:
The patent introduces a vertical dimension by stacking multiple color conversion layers at different positions relative to the light source. The first color conversion layer is positioned closer to the light source, while the second color conversion layer is positioned farther away. This spatial arrangement in the thickness direction enables sequential light conversion processes, improving color purity and luminous efficiency without compromising process performance.
2Loss of energy
If the light conversion unit orthographic projection is made smaller than the opening projection to improve light utilization, then light crosstalk is reduced, but manufacturing complexity increases
Solution Approach 1:
The patent applies partial action by making the light conversion unit's orthographic projection area smaller than the opening's projection area. This deliberate under-filling creates a gap between the light conversion unit and the opening boundaries, which serves to contain converted light within the opening region and prevent crosstalk with adjacent openings. The partial coverage approach simplifies manufacturing by using standard photolithography patterning while achieving the light containment effect.
Solution Approach 2:
The patent introduces a light-shielding layer as an intermediary element positioned between the light conversion units and the opening boundaries. This light-shielding layer fills the gap between the light conversion unit and the opening edges, providing additional light containment and preventing crosstalk. The intermediary layer simplifies the overall structure by allowing larger light conversion units while maintaining light utilization efficiency.
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 design simplifies the manufacturing process, enhances light utilization, and reduces light crosstalk, thereby improving the overall performance and efficiency of the display panel.
Implementation Method 1
the filter layer includes the filter unit located in the opening to transmit light in a certain wavelength range and block light in other wavelength ranges, thus achieving a filtering effect
Implementation Method 2
The light conversion layer includes light conversion units, where each light conversion unit is disposed on the side of the filter unit away from the supporting substrate, and the light is converted into light in a specific wavelength range by the light conversion unit
Implementation Method 3
The light-shielding portion is configured to prevent the light converted by the light conversion unit from being emitted toward the isolation portion
Data Source
AI summary
Embodiments of the present application provide a display panel, a display device, and a method for manufacturing the same. The display panel includes: a supporting substrate; an isolation portion disposed on one side of the supporting substrate, the isolation portion defining openings; a filter layer including a filter unit located in each of the openings; a light conversion layer including a light conversion unit disposed in each of the openings and located on a side of the filter unit away from the supporting substrate; and a light-shielding portion disposed on a side of the isolation portion away from the supporting substrate. The light-shielding portion prevents light from the light conversion unit from being emitted toward the isolation portion, thereby reducing light crosstalk.