Light Emitting Structure Optical Resonance Color Purity
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Solution Overview
Problem
Conventional organic light emitting display devices suffer from low functional stability of organic layers, low color purity, and high manufacturing costs due to complex processes and the need for color filters, which also reduce luminance efficiency.
Innovation Solution
A light emitting structure with a specific configuration including a first and second organic light emitting layer, a charge generation layer, and an optical distance controlling insulation layer, along with a blocking member, is used to enhance color purity and brightness by adjusting optical resonance distances for red, green, and blue light emission, eliminating the need for a color filter.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a color filter is disposed over the organic layers to improve color purity, then color purity is improved, but manufacturing complexity increases and manufacturing cost increases
Solution Approach 1:
The invention extracts and removes the color filter component from the display device structure. Instead of using a color filter to achieve color purity, the patent employs organic light emitting layers with inherently pure colors that emit red, green, and blue lights directly, eliminating the need for additional color filtering components and simplifying the manufacturing process.
2Manufacturing precision
If a color filter is disposed over the organic layers to improve color purity, then color purity is improved, but manufacturing cost increases
Solution Approach 1:
The invention extracts and removes the color filter component from the display device structure. Instead of using a color filter to achieve color purity, the patent employs organic light emitting layers with inherently pure colors that emit red, green, and blue lights directly, eliminating the need for additional color filtering components and simplifying the manufacturing process.
3Manufacturing precision
If a color filter is used to improve color purity, then color purity is improved, but luminance efficiency decreases
Solution Approach 1:
The invention extracts and removes the color filter component from the display device structure. Instead of using a color filter to achieve color purity, the patent employs organic light emitting layers with inherently pure colors that emit red, green, and blue lights directly, eliminating the need for additional color filtering components and simplifying the manufacturing process.
4Reliability
If organic layers are used in conventional structures, then device functionality is achieved, but functional stability is low
Solution Approach 1:
The invention segments the display device into distinct sub-pixel regions (first, second, and third sub-pixel regions) with different optical resonance distances. Each sub-pixel region contains specifically configured organic light emitting layers optimized for its function, allowing independent optimization of each region's stability and performance without compromising the overall device structure.
Solution Approach 2:
The invention applies local quality by configuring different optical resonance distances in different sub-pixel regions. The first sub-pixel region has a first optical resonance distance, the second sub-pixel region has a second optical resonance distance, and the third sub-pixel region has a third optical resonance distance, allowing each region to be optimized locally for its specific light emitting requirements, thereby improving overall functional stability.
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 improves color purity, brightness, and color gamut, reduces manufacturing costs, and extends the lifetime of the display device by separating blue and red/green light emitting layers, while simplifying the manufacturing process and preventing brightness reduction from color filters.
Implementation Method 1
adjusting optical resonance distances for red, green, and blue light emission
Data Source
AI summary
A light emitting structure includes a first hole injection layer, a first organic light emitting layer, a charge generation layer, a second hole injection layer, a second organic light emitting layer, an electron transfer layer, and a blocking member. The light emitting structure has first, second, and third sub-pixel regions. The first organic light emitting layer may be on the first hole injection layer. The charge generation layer may be on the first organic light emitting layer. The second hole injection layer may be on the charge generation layer. The second organic light emitting layer may be on the second hole injection layer. The electron transfer layer may be on the second organic light emitting layer. The blocking member may be at at least one of the first to the third sub-pixel regions.