Array Substrate with Segmented Connection Electrodes for LCD Transmittance
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Solution Overview
Problem
Current liquid crystal display (LCD) technologies face challenges in achieving high transmittance due to issues like black gaps and bright spots, which are exacerbated by the need for increased spacer density, leading to reduced sub-pixel aperture ratio and increased cost with the use of highly transparent materials, especially in high-resolution displays.
Innovation Solution
The design of an array substrate with a first electrode layer featuring strip electrodes and slits, where the connection electrode disconnects at specific positions to form openings, reducing ineffective electric fields and lateral parasitic capacitance, and incorporating a second electrode layer for improved voltage signal transmission, thereby enhancing the sub-pixel aperture ratio and transmittance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the size and number of spacers are increased to reduce black gaps, then the support density improves, but the sub-pixel aperture ratio decreases
Solution Approach 1:
The patent extracts the connection electrode from the continuous common electrode structure and divides it into segmented connection electrodes. This extraction allows the main body of the common electrode to be optimized for aperture ratio while the connection electrodes provide the necessary electrical connectivity and spacer support function.
Solution Approach 2:
The continuous common electrode is segmented into multiple connection electrodes that are disposed at different positions. This segmentation reduces the overall area occupied by electrode structures while maintaining the electrical connection function, thereby increasing the sub-pixel aperture ratio without compromising support density.
2Illumination intensity
If highly transparent materials are used to improve transmittance, then the display quality improves, but the cost increases
Solution Approach 1:
The patent changes the geometric parameters of the electrode structures, specifically reducing their area through segmentation and strategic positioning. This allows the use of standard materials while achieving higher transmittance by minimizing the blocking area, avoiding the need for expensive highly transparent materials.
3Reliability
If the common electrode is continuous to ensure electrical connection, then the electrical connectivity is maintained, but the lateral parasitic capacitance increases
Solution Approach 1:
The continuous common electrode is divided into multiple segmented connection electrodes. This segmentation reduces the total area of the electrode structures while maintaining electrical connectivity through the distributed connection points, thereby reducing lateral parasitic capacitance and energy loss.
Solution Approach 2:
The connection electrodes are strategically positioned to provide localized electrical connection points. This local quality approach ensures that electrical connectivity is maintained at critical points while minimizing the overall electrode area, thus reducing parasitic capacitance in non-essential regions.
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 reduces dark spots, decreases power consumption, and improves the transmittance of the display panel by increasing the sub-pixel aperture ratio and reducing storage capacitor size, while maintaining effective electric field formation for proper liquid crystal molecule deflection.
Implementation Method 1
The material is driven by an electric field that is generated on the basis of a difference in electric potential between each of the pixel electrodes and the common electrode
Data Source
Figure 1a
Figure 1b
Figure 1c
AI summary
Array substrate (100) may include a base substrate (3); a first electrode layer (A1) on the base substrate (3), and at least one connection electrode (12) at a periphery of the first electrode unit (M). The first electrode layer (A1) may include a plurality of first electrodes (1), each of the plurality of first electrodes (1) may include at least one first electrode unit (M), the first electrode unit (M) may include a plurality of strip electrodes (11), and a plurality of slits (10) are between the plurality of strip electrodes(11). The plurality of strip electrodes (11) are electrically connected to the connection electrode (12), and the connection electrode (12) disconnects at one or more positions such that corresponding ends of one or more of the plurality of slits (10) form openings at the one or more positions of the connection electrode (12).