Shared Emission Control Transistors for High-Density Pixel Circuits
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Solution Overview
Problem
Existing display devices face challenges in improving display quality and efficiency due to limitations in pixel design and transistor configurations, which affect the ability to efficiently emit different colors and increase pixel density.
Innovation Solution
A display device design that includes pixels sharing emission control transistors and symmetrical driving transistors, with specific transistor widths and connections to enhance light emission efficiency and pixel density, allowing for improved color reproduction and higher pixel per inch (PPI) performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If each pixel uses independent emission control transistors, then each pixel can be controlled independently, but the pixel area increases and pixel density decreases
Solution Approach 1:
Adjacent pixels share common emission control transistors (ELVDD transistor and ELVSS transistor), reducing the number of transistors per pixel from 7 to 5. This merging of control elements decreases pixel area while maintaining independent control capability through selective activation of shared transistors.
Solution Approach 2:
The shared emission control transistors serve multiple pixels simultaneously, making these transistors universal components that perform the same control function for different pixels. This multi-functionality reduces overall transistor count and increases pixel density without sacrificing control independence.
2Device complexity
If pixel area is increased to accommodate more transistors, then transistor functionality is improved, but pixel density and resolution decrease
Solution Approach 1:
Adjacent pixels share common emission control transistors (ELVDD transistor and ELVSS transistor), reducing the number of transistors per pixel from 7 to 5. This merging of control elements decreases pixel area while maintaining independent control capability through selective activation of shared transistors.
Solution Approach 2:
The patent optimizes transistor channel widths (setting ELVDD and ELVSS transistor channel widths to specific ranges) to ensure adequate current control capability with fewer transistors, allowing reduced pixel area while maintaining functionality.
3Measurement precision
If more transistors are used per pixel, then emission control precision is improved, but manufacturing complexity and area increase
Solution Approach 1:
Adjacent pixels share common emission control transistors (ELVDD transistor and ELVSS transistor), reducing the number of transistors per pixel from 7 to 5. This merging of control elements decreases pixel area while maintaining independent control capability through selective activation of shared transistors.
Solution Approach 2:
The patent optimizes transistor channel widths (setting ELVDD and ELVSS transistor channel widths to specific ranges) to ensure adequate current control capability with fewer transistors, allowing reduced pixel area while maintaining functionality.
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
The proposed design enhances display quality by optimizing transistor configurations, enabling efficient light emission and increased pixel density, thereby improving color accuracy and resolution.
Implementation Method 1
a light-emitting diode electrically connected to the second terminal of the driving transistor
Data Source
AI summary
A display device including a plurality of pixels that includes a first pixel and a second pixel that are disposed adjacent to each other in a same row. The first pixel and the second pixel share a same emission control transistor. The emission control transistor is electrically connected to a voltage line and to a common node. The common node is electrically connected to first terminals of driving transistors of both the first pixel and the second pixel.