Stacked Display Panel Color Conversion for Uniform Third-Color Brightness
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Solution Overview
Problem
Inorganic light-emitting diode display panels face challenges in achieving uniform brightness and display effects due to differences in light-emitting efficiency across different color layers, which requires vertical stacking of multiple inorganic LEDs to enhance pixel density.
Innovation Solution
A display panel design that includes a substrate with a first light-emitting element and a color conversion light-emitting element stacked in a perpendicular direction. The color conversion light-emitting element comprises a second color light-emitting layer and a third color color conversion layer, where the second color light-emitting layer with higher efficiency emits light to excite the third color color conversion layer, improving the light-emitting efficiency of the third color.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If multiple inorganic light-emitting diodes are stacked vertically to achieve ultra-high-density pixel resolution, then the PPI is significantly improved, but the brightness uniformity deteriorates due to different light-emitting efficiency of light-emitting layers of different colors
Solution Approach 1:
The patent introduces a color conversion layer as an intermediary component between the light-emitting layer and the external environment. This color conversion layer converts the emitted light from a first color to a second color, enabling the use of light-emitting layers with higher efficiency while achieving the desired color output. This mediator approach resolves the contradiction by decoupling the light-emitting efficiency requirement from the color requirements.
Solution Approach 2:
The patent changes the parameters of the light-emitting structure by using a first color light-emitting layer with higher light-emitting efficiency and introducing a color conversion layer to transform the light color. This parameter change allows the system to operate at higher efficiency while maintaining the required color output, thereby improving brightness uniformity across different colors in the vertical stacking configuration.
2Manufacturing precision
If multiple inorganic light-emitting diodes are stacked vertically to enhance pixel density, then the PPI is significantly improved, but the power consumption increases due to compensating for lower light-emitting efficiency of certain colors
Solution Approach 1:
The color conversion layer acts as a mediator that enables the system to use light-emitting layers with higher intrinsic efficiency. By converting the light color rather than relying on low-efficiency direct emission, the system reduces the total energy required to achieve the desired brightness and color output, thus lowering power consumption while maintaining high pixel density.
Solution Approach 2:
The patent changes the operational parameters by selecting light-emitting layers with higher efficiency characteristics and using color conversion to achieve the required color spectrum. This parameter optimization reduces the energy input needed to maintain the same output brightness, thereby reducing power consumption in high-density vertical stacking configurations.
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 light-emitting efficiency of the third color, thereby improving the overall brightness and display effect of the display panel without increasing the panel's area, which also reduces power consumption.
Implementation Method 1
a second color light-emitting layer and a third color color conversion layer disposed in the first direction in a stacking manner with the second color light-emitting layer
Implementation Method 2
the second color light-emitting layer with higher efficiency emits light to excite the third color color conversion layer
Data Source
AI summary
The present disclosure discloses a display panel and a display apparatus. The display panel includes a substrate and at least one light-emitting structure disposed on the substrate, the light-emitting structure includes a first light-emitting element and a color conversion light-emitting element, and the first light-emitting element includes a first color light-emitting layer; and the color conversion light-emitting element and the first light-emitting element are disposed on the substrate in a stacking manner in a first direction, the first direction is a direction perpendicular to the substrate, and the color conversion light-emitting element includes a second color light-emitting layer and a third color color conversion layer disposed in the first direction in a stacking manner with the second color light-emitting layer. The present disclosure may improve light-emitting efficiency of a third color in the display panel, and improve brightness and a display effect of the display panel.