Four-Subpixel Pixel Layout for Uniform Display Color Output
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Solution Overview
Problem
Existing display devices face challenges in achieving uniform color emission due to the arrangement of sub-pixels, which can result in undesirable color mixing.
Innovation Solution
The pixel design includes first to fourth driving transistors and corresponding light emitting diodes, with specific arrangements and size differences to prevent color mixing, and a display device structure that includes these pixels to maintain color accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If sub-pixels are arranged closely to increase pixel density, then productivity and resolution are improved, but color mixing occurs leading to undesirable color emission
Solution Approach 1:
The pixel is divided into four distinct sub-pixels (first, second, third, and fourth sub-pixels) with different planar areas, each emitting different colors. This segmentation allows close arrangement while maintaining color separation through the use of color filters and precise spatial positioning of each sub-pixel region.
Solution Approach 2:
Different regions of the pixel are assigned different properties: the first and second sub-pixels have larger planar areas for primary colors, while the third and fourth sub-pixels have smaller planar areas for secondary colors. Color filters are applied selectively to each sub-pixel region to ensure proper color emission without mixing.
2Device complexity
If sub-pixels are arranged in traditional configurations, then device complexity is reduced, but uniform color emission cannot be achieved
Solution Approach 1:
The pixel employs an asymmetric arrangement where the first and second sub-pixels have larger planar areas compared to the third and fourth sub-pixels. This asymmetric design allows optimization of color emission characteristics for different color channels while maintaining a relatively simple overall pixel structure.
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 allows for precise control of light emission, preventing color mixing and ensuring uniform color output across the display device.
Implementation Method 1
The pixel may include a driving element and a light emitting diode. The light emitting diode may include an organic light emitting diode, an inorganic light emitting diode, or the like.
Data Source
AI summary
A pixel includes: first to fourth driving transistors; a first light emitting diode connected to the first driving transistor; a second light emitting diode connected to the second driving transistor and spaced apart from the first light emitting diode in a first direction; a third light emitting diode connected to the third driving transistor and disposed between the first light emitting diode and the second light emitting diode; and a fourth light emitting diode connected to the fourth driving transistor and disposed between the first light emitting diode and the second light emitting diode, wherein a planar area of the first driving transistor is smaller than a planar area of each of the third and fourth driving transistors, a planar area of the second driving transistor is smaller than a planar area of each of the third and fourth driving transistors, and a first data signal is applied to the first and second driving transistors.