LCD Pixel Electrode Overlap for Visibility
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Solution Overview
Problem
Liquid crystal display (LCD) devices face challenges in enhancing visibility and aperture ratio, as existing designs often compromise on these parameters due to limitations in pixel electrode configurations and overlapping areas.
Innovation Solution
The proposed LCD device incorporates a unique pixel electrode configuration with a first, second, and third pixel electrode, where the third pixel electrode is a floating electrode, and the electrodes are made of transparent materials, with specific overlapping areas and symmetrical designs to optimize electric field control and aperture ratio.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If conventional pixel electrode configurations are used, then manufacturing simplicity is maintained, but visibility and aperture ratio are compromised
Solution Approach 1:
The pixel electrode is divided into multiple segments (first pixel electrode, second pixel electrode, third pixel electrode) with different functions and positions. The first pixel electrode is connected to the switching element, the second pixel electrode overlaps with the first, and the third pixel electrode is a floating electrode. This segmentation allows each electrode to contribute differently to light transmission and electric field control, thereby improving visibility and aperture ratio while maintaining manageable manufacturing complexity through systematic design.
2Reliability
If overlapping areas between pixel electrodes are increased, then electric field control is improved, but aperture ratio is reduced
Solution Approach 1:
Different regions of the pixel electrode structure are assigned different qualities and functions. The first pixel electrode region provides primary electrical connection, the overlapping second pixel electrode region enhances electric field control in specific areas, and the floating third pixel electrode region optimizes local field distribution without requiring continuous electrical connection. This local differentiation allows improved electric field control in critical areas while maintaining adequate aperture ratio in other regions.
3Area of stationary object
If transparent materials are used for pixel electrodes, then aperture ratio is improved, but electrical conductivity control becomes more challenging
Solution Approach 1:
The pixel electrodes utilize transparent conductive materials that combine optical transparency with electrical conductivity. The composite structure of multiple transparent electrode layers (first, second, and third pixel electrodes) allows optimization of both optical and electrical properties. The transparent materials enable high aperture ratio while the multi-layer composite configuration provides sufficient electrical conductivity control through the combined effect of multiple conductive layers.
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 the visibility and aperture ratio of the LCD device by allowing for differential electric field control across sub-domains, leading to improved luminance and efficiency in displaying a wide range of colors.
Implementation Method 1
liquid crystal molecules of the liquid crystal layer are rearranged by voltages that are applied to the two electrodes, thereby adjusting the amount of transmitted light and displaying an image on the LCD device
Implementation Method 2
liquid crystal molecules of the liquid crystal layer are rearranged by voltages that are applied to the two electrodes, thereby adjusting the amount of transmitted light
Data Source
AI summary
A liquid crystal display device includes: a first substrate; a second substrate opposing the first substrate; and a plurality of pixels on the first substrate, a pixel of the plurality of pixels includes: a switching element connected to a gate line and a data line on the first substrate; a first pixel electrode connected to the switching element; and a second pixel electrode connected to the switching element and overlapping the first pixel electrode.