OLED Pixel Area Optimization via Overlapping Semiconductor Structures
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Solution Overview
Problem
As display resolution increases, OLED displays face challenges in ensuring adequate area for elements within pixels, particularly for thin film transistors and capacitors, which affects display quality and storage capacity.
Innovation Solution
The OLED display design incorporates a substrate with signal lines, including scan lines, initialization lines, and data lines, featuring U-shaped semiconductor areas for transistors that overlap to optimize the area for pixels, ensuring efficient signal transmission and storage capacity through double-gate transistors and overlapping semiconductor areas.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If display resolution is increased, then display quality is improved, but the area available for pixel elements (transistors and capacitors) is reduced
Solution Approach 1:
The patent utilizes overlapping semiconductor areas in the vertical dimension (depth) to increase the effective area for pixel elements without expanding the horizontal pixel pitch. By forming semiconductor areas that overlap in the vertical direction, the design effectively adds a dimensional layer to accommodate more transistor and capacitor area within the same planar footprint, thereby resolving the contradiction between high resolution and sufficient element area.
2Area of stationary object
If the area for pixel elements is increased, then display quality is improved, but the pixel pitch must be increased reducing resolution
Solution Approach 1:
The overlapping semiconductor areas extend in the vertical direction, allowing increased element area without increasing horizontal pixel pitch. This dimensional approach enables more space for transistors and capacitors while maintaining tight horizontal spacing required for high resolution displays.
3Area of stationary object
If overlapping semiconductor areas are used to optimize pixel area, then area efficiency is improved, but manufacturing complexity increases
Solution Approach 1:
The semiconductor areas are divided into multiple segments (first, second, and third semiconductor areas) that are formed in different horizontal positions but overlap in the vertical direction. This segmentation allows the complex overlapping structure to be built through sequential formation steps, making the manufacturing process more manageable while achieving the desired area efficiency.
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 enhances display quality and secures storage capacity, improving the overall performance of OLED displays by ensuring sufficient area for pixel elements and preventing current leakage.
Implementation Method 1
An organic light-emitting diode (OLED) has a matrix of pixels, each one of which has luminance that can be controlled by controlling a current or voltage applied to the OLED
Data Source
AI summary
An OLED display is disclosed. A plurality of signal lines are formed over a substrate, and a plurality of pixels are formed over the substrate in a matrix form and electrically connected to corresponding signal lines. The signal lines include a plurality of scan lines configured to transmit a scan signal, a plurality of initialization lines configured to transmit an initialization signal, and a plurality of data lines configured to transmit a data signal. An n-th row pixel includes a switching thin film transistor (TFT) electrically connected to an n-th row scan line and a corresponding data line among the data lines. A driving TFT is electrically connected to a drain of the switching TFT, an OLED is electrically connected to a drain of the driving TFT, and an initialization TFT is configured to be turned on based on an initialization signal transmitted via an n-th row initialization line.