Blocking Patterns in Display Electrodes Reduce Leakage Current
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Solution Overview
Problem
Low-frequency driving methods for display devices are prone to generating leakage currents due to external light, leading to noticeable flicker phenomena.
Innovation Solution
The display device incorporates a specific electrode pattern design, including first and second blocking patterns, and stabilization electrodes, which overlap active areas and channel regions to block external light, thereby reducing leakage currents and flicker.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by stationary object
If low-frequency driving method is used, then power consumption is reduced, but leakage current is generated due to external light causing flicker phenomenon
Solution Approach 1:
The patent converts the harmful effect of external light into a beneficial structure by introducing blocking patterns that specifically target and block external light sources. The blocking patterns are strategically positioned to intercept light before it reaches the active areas, transforming the light-blocking function from a passive shield into an active defense mechanism that prevents leakage current generation during low-frequency operation.
Solution Approach 2:
The patent applies local quality by creating blocking patterns with specific geometric characteristics (width, height, spacing) positioned at critical locations around the active areas. The blocking patterns are not uniformly applied but are strategically placed where external light most likely to cause leakage current, providing localized protection where needed most while maintaining overall display functionality.
2Object-affected harmful factors
If blocking patterns are added to block external light, then leakage current is reduced, but device complexity increases
Solution Approach 1:
The patent merges the blocking pattern function with existing electrode structures. The blocking patterns are integrated into the gate electrode or source/drain electrode configurations, combining the light-blocking function with the existing electrical connection structures. This merging approach allows the blocking patterns to serve dual purposes: blocking light and maintaining electrical functionality, thereby reducing the net increase in device complexity.
Solution Approach 2:
The blocking patterns are designed to serve multiple functions simultaneously: they block external light, maintain structural integrity of the electrode pattern, and can be integrated with existing electrical connection paths. By making the blocking patterns multi-functional elements rather than separate additive components, the patent reduces the overall complexity increase that would result from adding dedicated light-blocking structures.
Data Source
AI summary
A display device includes a substrate, an active pattern including a first area, a second area, a first channel area, and a second channel area, a first conductive layer, a second conductive layer, a first electrode pattern including a first blocking pattern protruding from a portion overlapping the first area toward the second channel area, a second electrode pattern including a second blocking pattern protruding from a portion overlapping the first electrode pattern toward the first channel area and overlapping the first channel area, and a first initialization voltage line including a third blocking pattern overlapping the second channel area.