Array Substrate With Shared Initialization Terminals
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Solution Overview
Problem
As display devices become thinner, the space for circuit structures decreases, leading to increased coupling effects between pixel circuits, which can result in leakage currents, affecting the performance of pixel circuits and making it difficult to accurately compensate for threshold voltage drifts.
Innovation Solution
The array substrate design includes coupling initialization control terminals, data writing control terminals, and light emission control terminals between pixel circuits, sharing a common power line and using dual-gate transistors to reduce leakage currents and optimize circuit structure, allowing simultaneous initialization and light emission while reducing the number of signal lines and occupied space.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If pixel circuits are placed closer to each other to reduce display device thickness, then the display device becomes thinner, but coupling effects between pixel circuits increase causing leakage currents
Solution Approach 1:
The patent merges the initialization control terminals of adjacent pixel circuits into a single shared terminal. This allows the initialization signal to be applied simultaneously to multiple pixel circuits through a common control line, reducing the number of signal lines and minimizing the coupling effects between closely spaced pixel circuits while maintaining proper initialization functionality
Solution Approach 2:
The shared initialization control terminal serves multiple pixel circuits simultaneously, making it a universal control element. This multi-functional approach allows a single control line to initialize multiple pixel circuits, reducing the overall number of signal lines and decreasing the space required for circuit structures
2Area of stationary object
If the number of signal lines is reduced to optimize circuit structure, then occupied space decreases, but circuit complexity increases
Solution Approach 1:
Adjacent pixel circuits share common initialization control terminals and initialization voltage terminals, merging multiple control lines into fewer shared lines. This reduces the total number of signal lines and decreases the occupied area while the modular pixel circuit design maintains overall system manageability
Solution Approach 2:
Shared control terminals and voltage terminals serve multiple pixel circuits, creating universal elements that reduce the number of dedicated components. This multi-functionality approach optimizes space utilization while the systematic sharing pattern keeps the circuit structure organized and manageable
3Temperature
If pixel circuits are placed closer to each other, then display device thickness is reduced, but threshold voltage compensation accuracy deteriorates
Solution Approach 1:
The initialization circuit applies an initialization voltage to the storage capacitor before data writing and threshold compensation operations. This preliminary action resets the capacitor to a known state, eliminating residual charges that could interfere with accurate threshold voltage compensation, thereby maintaining compensation accuracy even in closely spaced pixel circuits
Solution Approach 2:
The initialization voltage applied to the storage capacitor beforehand cushions against potential threshold voltage drift by establishing a stable reference state. This prior cushioning ensures that subsequent compensation operations start from a clean baseline, improving measurement precision for threshold voltage compensation
Data Source
AI summary
Embodiments of the disclosure provide an array substrate and a driving method, a display panel and a display device. An initialization control terminal of a first pixel circuit is coupled to an initialization control terminal of a second pixel circuit. The array substrate and the driving method, the display panel and the display device provided according to the embodiments of the disclosure may reduce the number of signal lines and the occupied space.