OLED Display Panel Luminescent Material Blocks for High Resolution
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Solution Overview
Problem
Conventional OLED display panels face limitations in reducing sub-pixel dimensions due to the minimum aperture dimension of the Fine Metal Mask (FMM) process, hindering resolution upgrades.
Innovation Solution
The display panel is divided into multiple regions with distinct anode layers and luminescent material blocks, allowing for smaller light-emitting sections and the use of different luminescent materials, such as red, green, and blue blocks, which are made of host materials doped with phosphorescent or fluorescent materials, to enhance resolution and display quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the Fine Metal Mask (FMM) process is used to form luminescent material layers, then the manufacturing process is well-established and reliable, but the minimum aperture dimension limits further reduction of sub-pixel dimensions
Solution Approach 1:
The luminescent material layer is segmented into multiple distinct layers (first luminescent material layer, second luminescent material layer, third luminescent material layer) with different luminescent materials. This segmentation allows each layer to be formed with larger apertures while achieving smaller effective sub-pixel dimensions through selective stacking and overlapping of these layers, thereby overcoming the FMM minimum aperture limitation.
Solution Approach 2:
The patent transitions from a single-layer luminescent material structure to a multi-layer stacked structure. By adding the vertical dimension (stacking multiple layers at different heights), the effective light-emitting area can be reduced in the horizontal plane while maintaining or enhancing overall luminance output, thus achieving higher resolution without being constrained by the minimum aperture of the FMM process.
2Measurement precision
If sub-pixel dimensions are reduced to upgrade display resolution, then display resolution improves, but the minimum aperture dimension of FMM prevents further reduction
Solution Approach 1:
The luminescent material layer is segmented into multiple distinct layers (first luminescent material layer, second luminescent material layer, third luminescent material layer) with different luminescent materials. This segmentation allows each layer to be formed with larger apertures while achieving smaller effective sub-pixel dimensions through selective stacking and overlapping of these layers, thereby overcoming the FMM minimum aperture limitation.
Solution Approach 2:
The patent transitions from a single-layer luminescent material structure to a multi-layer stacked structure. By adding the vertical dimension (stacking multiple layers at different heights), the effective light-emitting area can be reduced in the horizontal plane while maintaining or enhancing overall luminance output, thus achieving higher resolution without being constrained by the minimum aperture of the FMM process.
3Length of moving object
If multiple luminescent material blocks are stacked to form light-emitting sections, then smaller pixel dimensions are achieved, but the structural complexity increases
Solution Approach 1:
The luminescent material layer is segmented into multiple distinct layers (first luminescent material layer, second luminescent material layer, third luminescent material layer) with different luminescent materials. This segmentation allows each layer to be formed with larger apertures while achieving smaller effective sub-pixel dimensions through selective stacking and overlapping of these layers, thereby overcoming the FMM minimum aperture limitation.
Solution Approach 2:
Each luminescent material layer is designed to serve multiple functions: it acts as both a structural element defining the sub-pixel pattern and as a functional light-emitting element. The layers are positioned at different heights and can be selectively activated, allowing the same physical structure to control both the geometric pattern and the luminous output, thereby reducing overall device complexity.
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 enables the creation of pixels with smaller dimensions, improving display resolution and quality, and allows for better color mixing and reduced energy consumption by controlling light emission from different sub-pixels.
Implementation Method 1
a first light-emitting section located in the first region and being a portion located in the first region of a first luminescent material block, a second light-emitting section located in the second region and formed by stacking a portion located in the second region of the first luminescent material block and a portion located in the second region of a second luminescent material block
Implementation Method 2
the use of different luminescent materials, such as red, green, and blue blocks, which are made of host materials doped with phosphorescent or fluorescent materials
Implementation Method 3
the use of different luminescent materials, such as red, green, and blue blocks, which are made of host materials doped with phosphorescent or fluorescent materials
Data Source
AI summary
The present invention discloses a display panel, which includes a display unit. The display unit includes an anode layer, a hole injection layer, a hole transport layer, a luminescent material layer, an electron transporting layer, an electron injection layer, a cathode layer. The luminescent material layer includes the first luminescent material block, the second luminescent material block, and the third luminescent material block. The first luminous material block and the second luminous material block are partially overlapped, and the second luminous material block and the third luminescent material block are partially overlapped. The present invention is beneficial to producing a pixel having a smaller dimension in the display panel.