Double-Sided OLED Panel with Single TFT Array
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current double-sided OLED display panels, achieved by bonding two independent back plates back-to-back, result in thick thickness and complex manufacturing processes, failing to meet consumer demands for lightness, thinness, and cost-effectiveness.
Innovation Solution
A double-sided display panel design with alternating top and bottom light emitting areas, featuring a base substrate, thin film transistor array, and OLED light emitting layers, where the thin film transistor array controls both top and bottom subpixels, and a storage capacitor with transparent electrode layers, simplifying the structure and reducing thickness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If two independent OLED back plates are bonded back-to-back to achieve double-sided display, then double-sided display function is realized, but the thickness increases and manufacturing complexity increases
Solution Approach 1:
The patent merges two independent OLED back plate structures into a single integrated back plate. The thin film transistor array is formed once on a single substrate, with OLED light emitting layers formed on both front and back surfaces. This eliminates the need to bond two separate back plates, reducing manufacturing steps and complexity while maintaining double-sided display functionality.
Solution Approach 2:
The single thin film transistor array performs dual functions by controlling OLED light emitting layers on both the front and back surfaces of the back plate. Each thin film transistor controls corresponding subpixels on both surfaces, making the transistor array universal for driving both display surfaces simultaneously.
2Adaptability or versatility
If two independent OLED back plates are bonded back-to-back to achieve double-sided display, then double-sided display function is realized, but the thickness of the display increases
Solution Approach 1:
By combining two back plate structures into one integrated back plate with a single substrate, the overall thickness is reduced. The OLED light emitting layers are formed directly on both surfaces of the same substrate rather than bonding two separate thick back plates together.
3Adaptability or versatility
If two independent OLED back plates are bonded back-to-back to achieve double-sided display, then double-sided display function is realized, but manufacturing cost increases
Solution Approach 1:
The patent combines the manufacturing of two independent back plates into a single integrated manufacturing process. The thin film transistor array is fabricated once, and OLED light emitting layers are formed on both surfaces in sequence, eliminating duplicate manufacturing steps, materials, and labor costs associated with producing and bonding two separate back plates.
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 enables thinner OLED double-sided display panels with reduced manufacturing complexity and costs, while maintaining high display performance.
Implementation Method 1
a first OLED light emitting layer, a second OLED light emitting layer... the first OLED light emitting layer is disposed on the thin film transistor array and is located in the top light emitting area; the second OLED light emitting layer is disposed on the thin film transistor array and is located in the bottom light emitting area
Implementation Method 2
the storage capacitor includes a first transparent electrode layer and a second transparent electrode layer which are disposed oppositely
Data Source
AI summary
A double-sided display panel includes a base substrate, a thin film transistor array, a first OLED light emitting layer located in a top light emitting area and a second OLED light emitting layer located in a bottom light emitting area; the thin film transistor array is located in the top light emitting area; a thin film transistor of the thin film transistor array simultaneously controls a top light emitting subpixel and a bottom light emitting subpixel. Through one OLED back plate to realize double-sided simultaneous display, can reduce whole thickness of the OLED double-sided display panel, simplify manufacturing process, thereby saving manufacturing costs.