Alternating Pixel Electrode Geometries for Display Viewing Angle Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing display devices face challenges in maintaining image quality, particularly in terms of color shift and luminance ratio degradation, when viewing angles change.
Innovation Solution
The display device incorporates alternately arranged first and second pixels, with distinct pixel electrodes and light blocking layers. The first pixels include a curved pixel electrode with inclined portions, while the second pixels have a flat pixel electrode, allowing for adjustable viewing angles and reduced image quality degradation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a display device uses a conventional pixel structure with uniform pixel electrodes, then the manufacturing process is simple, but the luminance ratio characteristics degrade when viewing angles change
Solution Approach 1:
The pixel electrode is designed with different local geometries: first pixels have pixel electrodes with curved edges while second pixels have pixel electrodes with straight edges. This local differentiation optimizes luminance ratio characteristics for different viewing conditions without requiring complete structural redesign of all pixels, thus resolving the contradiction between improving reliability and maintaining manufacturing simplicity.
Solution Approach 2:
The display device introduces asymmetric pixel electrode designs where first pixels and second pixels have deliberately different edge geometries (curved vs. straight). This asymmetry allows the device to achieve better luminance ratio characteristics across different viewing angles by optimizing each pixel type's light emission pattern, addressing the reliability issue without excessive complexity.
2Reliability
If a display device uses identical pixel electrodes for all pixels, then the device structure is simple, but color shift occurs when viewing angles change
Solution Approach 1:
Different pixel electrodes are designed with specific local geometries (curved for first pixels, straight for second pixels) to control light emission characteristics. This local quality differentiation helps maintain color consistency across various viewing angles by optimizing the angular distribution of light from each pixel type, resolving the contradiction between color consistency and structural complexity.
3Adaptability or versatility
If a display device uses a single pixel electrode shape, then the manufacturing process is simple, but the viewing angle is fixed and cannot be adjusted for different usage scenarios
Solution Approach 1:
The pixel array is segmented into two types: first pixels with curved pixel electrodes for wide viewing angles, and second pixels with straight pixel electrodes for narrow viewing angles. This segmentation allows the display device to adapt to different usage scenarios by selectively activating appropriate pixel types, achieving viewing angle adjustability without excessive complexity through systematic pixel classification.
Solution Approach 2:
The display device achieves multi-functionality by incorporating both first pixels and second pixels with different electrode geometries in the same display panel. This universal design allows the device to provide both wide viewing angle mode (using first pixels) and narrow viewing angle mode (using second pixels), enabling adaptability to different usage scenarios while maintaining a relatively simple overall structure.
Data Source
AI summary
A display device includes a plurality of first pixels and a plurality of second pixels alternately arranged, and a driver that drives the plurality of first pixels and the plurality of second pixels by individually applying a driving signal and a voltage, each of the plurality of first pixels includes a first transistor and a first pixel electrode electrically connected to the first transistor, each of the plurality of second pixels includes a second transistor and a second pixel electrode electrically connected to the second transistor, and the first pixel electrode and the second pixel electrode have different shapes from each other in a cross-sectional view.