Array Substrate Microcavity Structure for WOLED Brightness
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Solution Overview
Problem
Existing microcavity structures in WOLED display devices are complex and require complicated manufacturing processes to achieve different thicknesses for each color filter, making them difficult and costly to produce.
Innovation Solution
A simplified manufacturing process for an array substrate that forms a microcavity structure between a transflective layer and a reflective electrode, with color filters of different colors having varying thicknesses, allowing for easy control of microcavity thicknesses and integration within the manufacturing process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If conventional microcavity structures are used to increase light transmittance, then brightness is improved, but manufacturing process complexity increases
Solution Approach 1:
The patent combines the color filter layer and the microcavity structure into a single integrated layer. The color filter layer itself serves as the microcavity structure, eliminating the need for separate microcavity layers and complex multi-step manufacturing processes while maintaining the light-enhancing function.
Solution Approach 2:
The color filter layer is given dual functionality: it performs both color filtering and microcavity light enhancement functions. This eliminates the need for separate dedicated microcavity structures, simplifying the overall device architecture and manufacturing process.
2Illumination intensity
If separate microcavity structures are manufactured for each color filter, then light transmittance of each color is improved, but manufacturing precision requirements increase
Solution Approach 1:
The patent merges the color filter layer and microcavity structure into a single integrated layer. The color filter layer itself serves as the microcavity structure, eliminating the need for separate microcavity layers and complex multi-step manufacturing processes while maintaining the light-enhancing function.
3Illumination intensity
If multiple layers are added to form microcavity structures, then light transmittance is improved, but device complexity increases
Solution Approach 1:
The color filter layer is given dual functionality: it performs both color filtering and microcavity light enhancement functions. This eliminates the need for separate dedicated microcavity structures, simplifying the overall device architecture and manufacturing process.
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 approach increases light transmittance by forming a microcavity structure with adjustable thicknesses for each pixel unit, enhancing brightness while simplifying the manufacturing process and reducing costs.
Implementation Method 1
light rays can be continuously reflected between the reflective layer and the transflective layer, and due to resonance effect, in light finally exiting the transflective layer, light with a specific wavelength will be intensified
Implementation Method 2
the white light emitted by the organic light-emitting layer is reflected by the cathode 101 and then exit from a side of the anode 103
Data Source
Figure 1(a)~3
Figure 4~6
Figure 7~9
AI summary
Embodiments of the present invention disclose an array substrate comprising a base substrate (1) and a plurality of pixel units disposed on the base substrate, the pixel unit comprising a transflective layer (8) formed on the base substrate; a thin film transistor structure formed over the transflective layer; an organic light-emitting diode disposed in a pixel region (A)of the pixel unit and driven by the thin film transistor structure, and in a direction away from the base substrate, the organic light-emitting diode sequentially comprising a first electrode (11) that is transparent, an organic light-emitting layer (13) and a second electrode (14) for reflecting light; and a color filter (9), disposed between the second electrode (14) of the organic light-emitting diode and the transflective layer (8); wherein the second electrode of the organic light-emitting diode and the transflective layer constitute a microcavity structure. Embodiments of the present invention also disclose a method for manufacturing the array substrate and a display device including the above array substrate.