Staggered Pixel Electrode Layout for Display Lateral Visibility
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Solution Overview
Problem
High-resolution display devices face challenges with reduced aperture ratio and transmittance due to the inclusion of multiple subpixels, leading to deteriorated luminance uniformity and visibility issues.
Innovation Solution
The display device employs a configuration where pixels are connected to data lines in a staggered structure, with specific gamma curves for high and low gray pixels, and pixel electrodes designed with transverse, longitudinal, and branch parts to optimize electric field orientation and reduce parasitic capacitance, ensuring improved lateral visibility and aperture ratio.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If pixels include two or more subpixels to improve side visibility, then lateral visibility is improved, but the aperture ratio of the pixel is lowered and transmittance is deteriorated
Solution Approach 1:
The pixel electrode is divided into multiple sub-pixel electrodes (first, second, third, and fourth sub-pixel electrodes) with different shapes and orientations. Each sub-pixel electrode creates a specific electric field pattern that contributes to improved lateral visibility. The segmentation allows each sub-region to optimize for viewing from different directions while collectively maintaining a higher overall aperture ratio compared to traditional multi-subpixel designs.
Solution Approach 2:
Different sub-pixel electrodes are designed with different local qualities - specifically, different shapes, sizes, and orientations tailored to their specific positions within the pixel. For example, sub-pixel electrodes at different locations have different orientations to optimize electric field distribution for lateral viewing from various angles. This local optimization allows the entire pixel to achieve improved lateral visibility without sacrificing overall aperture ratio.
2Illumination intensity
If pixels include two or more subpixels to improve side visibility, then lateral visibility is improved, but transmittance is deteriorated
Solution Approach 1:
The pixel electrode is segmented into multiple sub-pixel electrodes with different configurations. This segmentation enables optimized light transmission paths for different viewing angles. By carefully designing the shape, size, and orientation of each sub-pixel electrode, the structure maximizes light transmittance while still providing the electric field patterns necessary for improved lateral visibility.
Solution Approach 2:
The invention changes key parameters of the pixel electrode structure - including the shape, size, orientation, and spatial arrangement of sub-pixel electrodes. These parameter changes are optimized to balance two competing requirements: creating sufficient electric field patterns for lateral visibility improvement while minimizing the blocking of light transmission. The specific parameters are tuned to achieve both goals simultaneously.
3Loss of energy
If the aperture ratio is increased to improve transmittance, then transmittance is improved, but luminance uniformity between pixels deteriorates
Solution Approach 1:
Different sub-pixel electrodes within the same pixel are designed with different local qualities - specifically different shapes, sizes, and orientations based on their specific positions. This local differentiation compensates for variations in electric field distribution across the pixel, ensuring uniform luminance output. The asymmetric design of sub-pixel electrodes creates balanced electric field patterns that maintain luminance uniformity even as the overall aperture ratio is increased.
Solution Approach 2:
The invention employs asymmetric design in the sub-pixel electrodes, where each sub-pixel electrode has a unique shape and orientation rather than being identical. This asymmetry is strategically designed to balance the electric field distribution across the pixel area. By introducing controlled asymmetry in the electrode configurations, the invention achieves both higher aperture ratio and maintained luminance uniformity, as the asymmetric patterns compensate for positional variations and prevent hot spots or uneven brightness.
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 enhances lateral visibility, reduces luminance deviation between pixels, and maintains high transmittance by optimizing the aperture ratio and electric field distribution, preventing spots and improving image quality.
Implementation Method 1
The liquid crystal display applies a voltage to the field generating electrode to generate an electric field to the liquid crystal layer, such that a direction of liquid crystal molecules of the liquid crystal layer is determined and a desired image may be displayed by controlling polarization of incident light
Implementation Method 2
a desired image may be displayed by controlling polarization of incident light
Data Source
AI summary
The present disclosure relates to a display device. A display device according to an embodiment of the present inventive concept includes gate lines extending along a first direction, data lines extending along a second direction, pixels including pixel electrodes, each of the pixels including a transistor connected to a gate line and a data line, and a pixel electrode connected to the transistor, the pixels including a first pixel which includes a first pixel electrode connected to a first data line and is disposed in nth pixel row and mth pixel column, and a second pixel which includes a second pixel electrode connected to the first data line or a second data line disposed adjacent to the first data line and is disposed in (n+1)th pixel row and the mth pixel column. The first data line does not overlap the first pixel electrode and overlaps the second pixel electrode.