Pixel Structure Conductive Pattern for Curved Display Alignment
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Solution Overview
Problem
Curved liquid crystal display (LCD) panels face issues of uneven brightness, low contrast, and light leakage due to displacement between upper and lower substrates, which also increase resistance-capacitance loading (RC loading), degrading display quality.
Innovation Solution
A pixel structure is designed with a conductive strip-shaped pattern overlapping the data line, featuring an opening that partially exposes the data line, reducing the overlapping area and RC loading, and ensuring a stable electric field, thereby preventing issues caused by substrate displacement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the LCD panel is bent and aligned, then the display can be used on non-flat surfaces, but the upper and lower substrates displace causing black matrix shift and aperture ratio decrease
Solution Approach 1:
The patent divides the conductive layer into multiple segments: a first conductive layer on the lower substrate, a second conductive layer on the upper substrate, and a third conductive layer connecting them. This segmentation allows each layer to independently compensate for displacement, maintaining overall alignment precision while enabling bending adaptability.
Solution Approach 2:
The patent changes the electrical parameter (voltage) applied to different conductive layers. By applying different voltages to the first, second, and third conductive layers, the patent creates adjustable electric fields that compensate for substrate displacement, thereby maintaining aperture ratio and preventing black matrix shift during bending.
2Adaptability or versatility
If different stresses are generated at different locations after bending, then the display adapts to curved surfaces, but displacement levels become non-uniform causing low contrast and Mura effect
Solution Approach 1:
The patent applies different voltages to different conductive layers at different locations. The first conductive layer on the lower substrate, the second conductive layer on the upper substrate, and the third conductive layer connecting them receive tailored voltage inputs, creating locally adjusted electric fields that compensate for non-uniform displacement caused by bending stresses.
Solution Approach 2:
By changing the voltage parameter applied to each conductive layer independently, the patent compensates for non-uniform displacement. This allows different regions of the display to be adjusted according to their specific displacement levels, maintaining uniformity in image quality across the entire curved surface.
3Stability of the object's composition
If the black matrix shifts to cover aperture area, then substrate displacement is accommodated, but aperture ratio decreases and light leakage occurs
Solution Approach 1:
The patent preliminarily establishes a compensation mechanism using multiple conductive layers before substrate displacement occurs. By pre-configuring the first, second, and third conductive layers with appropriate voltages, the patent creates electric fields that proactively counteract displacement forces, preventing black matrix shift and aperture coverage before they happen.
Solution Approach 2:
The patent uses voltage parameter changes in the conductive layers to generate electric fields that exert forces on the black matrix and substrates, counteracting displacement. By adjusting the voltage parameters, the patent maintains the black matrix in its correct position while preserving the full aperture area.
4Manufacturing precision
If conductive material is added to compensate for displacement, then substrate alignment is maintained, but RC loading increases
Solution Approach 1:
The patent uses thin conductive film layers instead of bulky conductive structures. The first conductive layer, second conductive layer, and third conductive layer are implemented as thin films that provide necessary electrical compensation with minimal parasitic capacitance and resistance, thereby reducing RC loading while maintaining alignment precision.
Solution Approach 2:
The patent optimizes the voltage parameters applied to the conductive layers to achieve the minimum necessary compensation effect. By carefully controlling the voltage magnitude and distribution, the patent reduces the amount of conductive material needed and minimizes RC loading while still maintaining substrate alignment precision.
Data Source
AI summary
A pixel structure is provided. The pixel structure has a first substrate, a scan line, a data line, an active device, a pixel electrode, and a conductive strip-shaped pattern. The scan line and the data line are located on the first substrate. The active device is electrically connected to the scan lines and the data line. The pixel electrode is electrically connected to the active device. The conductive strip-shaped pattern is correspondingly disposed over the data line. The conductive strip-shaped pattern has an opening at least partially overlapped with the data line in a vertical projection at the first substrate.