Array Substrate Extension Portions Detect Charge Sharing Short Circuits
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Solution Overview
Problem
Liquid crystal display devices with charge sharing pixels face issues of microspots and low display quality due to short-circuiting between charge sharing capacitors and sub-pixel electrodes, which cannot be effectively detected in prior art.
Innovation Solution
The array substrate design includes sub-pixel electrodes with extension portions positioned between adjacent sub-pixels and capacitors, allowing for detection of short circuits by sequentially turning on color sub-pixels and observing for extraneous colors, indicating short-circuiting between extension portions and capacitors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If charge sharing pixels with transparent conductive layer are used to improve color shift at large viewing angle, then viewing angle performance is improved, but short circuit between charge sharing capacitor and sub-pixel electrode may occur causing microspots and low display quality
Solution Approach 1:
The sub-pixel electrode is divided into a main body portion and an extension portion. The extension portion is specifically positioned to extend toward the charge sharing capacitor, creating a dedicated detection zone that segments the electrode structure to identify short circuit locations without affecting the overall pixel functionality.
Solution Approach 2:
The extension portion of the sub-pixel electrode acts as an intermediary element between the sub-pixel electrode and the charge sharing capacitor. It serves as a detection probe that can identify short circuits by observing abnormal color display when sequentially activated, without directly causing the short circuit.
2Ease of manufacture
If conventional charge sharing pixel structure is used, then manufacturing process is simple, but short circuit between charge sharing capacitor and sub-pixel electrode cannot be detected
Solution Approach 1:
The extension portion is pre-configured in the sub-pixel electrode during the manufacturing process, positioned to extend toward the charge sharing capacitor. This preliminary structural arrangement enables subsequent detection of short circuits through simple visual observation of color display abnormalities, without requiring complex detection equipment or additional manufacturing steps.
3Difficulty of detecting and measuring
If sub-pixel electrode extension portion is added to enable short circuit detection, then detection capability is improved, but device structure becomes more complex
Solution Approach 1:
The extension portion of the sub-pixel electrode serves multiple functions: it maintains the normal electrode function for displaying the sub-pixel color, and simultaneously acts as a detection probe for identifying short circuits with the charge sharing capacitor. By making the extension portion have the same material properties and electrical characteristics as the main electrode, it performs both display and detection functions without requiring separate detection structures.
Data Source
AI summary
The disclosure is related to an array substrate, a display panel and a method for detecting the array substrate. The array substrate comprises a plurality of pixels arranged in an array. Each of the pixels comprises a plurality of sub-pixels arranged in sequence. Each of the sub-pixels is arranged opposite to a capacitor at an interval. Each sub-pixel comprises a sub-pixel electrode. At least one sub-pixel electrode comprises an extension portion. At least one extension portion of the sub-pixel electrode of the sub-pixel is arranged corresponding to the space between the adjacent sub-pixel and the capacitor corresponding to the adjacent sub-pixel.