OLED Pixel Layout for Brightness Uniformity and Low Crosstalk
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Solution Overview
Problem
Conventional OLED display devices suffer from graphic asymmetry in left-to-right viewing angle and issues such as overlapping light emitting layers, leading to poor signal crosstalk and manufacturing challenges with blue sub-pixels.
Innovation Solution
A pixel structure with sub-pixels arranged in an imaginary quadrilateral configuration, including a first and second color sub-pixel on the diagonal and third color sub-pixels at opposite corners, with optimized shapes and vapor deposition methods to reduce layer overlap and manufacturing difficulties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If sub-pixels are arranged in conventional configurations, then manufacturing process is simpler, but graphic asymmetry occurs in left-to-right viewing angle
Solution Approach 1:
The patent applies asymmetry principle by arranging sub-pixels in a non-conventional asymmetric configuration where the first color sub-pixel is positioned at a first position and the second color sub-pixel is positioned at a second position that is not symmetrically equivalent. This asymmetric arrangement compensates for manufacturing deviations and eliminates graphic asymmetry in left-to-right viewing angle while maintaining manufacturing feasibility.
2Productivity
If light emitting layers are deposited using conventional vapor deposition methods, then manufacturing process is faster, but layers overlap causing poor signal crosstalk
Solution Approach 1:
The patent applies preliminary action principle by pre-positioning the first and second color sub-pixels at specifically designed positions before vapor deposition. The positions are calculated in advance to ensure that during rapid vapor deposition, the light emitting layers will not overlap despite process variations. This pre-planned positioning maintains both high deposition speed and precise layer separation.
3Ease of manufacture
If blue sub-pixels are manufactured using conventional methods, then production is simpler, but manufacturing precision and service life are poor
Solution Approach 1:
The patent applies local quality principle by treating blue sub-pixels differently from other color sub-pixels. The third color sub-pixel (blue) is positioned at a third position that is specifically optimized for blue material deposition characteristics. This localized special positioning compensates for the inherently poorer manufacturing precision of blue OLED materials while maintaining overall production simplicity.
4Illumination intensity
If sub-pixel areas are increased to improve brightness, then display quality improves, but signal crosstalk increases
Solution Approach 1:
The patent applies dimensionality change principle by solving the brightness-crosstalk contradiction through spatial repositioning in multiple dimensions. By adjusting the positions of sub-pixels in both horizontal and vertical dimensions, the patent enables larger sub-pixel areas for improved brightness while maintaining sufficient separation distances to prevent signal crosstalk. The multi-dimensional position optimization allows simultaneous achievement of high brightness and low crosstalk.
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
Improves brightness uniformity, reduces signal crosstalk, and enhances manufacturing precision, resulting in improved display quality and extended service life.
Implementation Method 1
OLED (Organic Light emitting Diode) display devices
Data Source
AI summary
The present disclosure provides a pixel structure, a display substrate and a display device, and relates to the field of display technology. The pixel structure includes a plurality of sub-pixels located in an imaginary quadrilateral, the plurality of sub-pixels include a first color sub-pixel, a second color sub-pixel and at least one third color sub-pixel, the imaginary quadrilateral includes a first inner corner and a second inner corner that are opposite to each other, and a third inner corner and a fourth inner corner that are opposite to each other. The first color sub-pixel is located at the first inner corner c1, the second color sub-pixel 22 is located at the second inner corner c2, and at least one third color sub-pixel is located at the third inner corner c3 and the fourth inner corner c4.