Pixel Circuit Maintenance Circuit for High-Resolution Display Compensation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
High-resolution display products face challenges in maintaining compensation characteristics due to reduced pixel size and simplified manufacturing processes, leading to poor performance of storage capacitors in pixel circuits.
Innovation Solution
A pixel circuit design that includes an initialization circuit, driving circuit, charging circuit, control circuit, and maintenance circuit, with specific transistors and capacitors configured to maintain node potentials and output driving currents for stable light emission, improving compensation characteristics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the resolution of the display product is increased, then the display quality is improved, but the area occupied by each pixel becomes smaller, causing the storage capacitor to become smaller and the compensation characteristic to be degraded
Solution Approach 1:
The pixel circuit is divided into multiple functional modules: initialization circuit, charging circuit, maintenance circuit, driving circuit, and control circuit. Each module performs a specific function to ensure proper operation of the storage capacitor and transistor, thereby maintaining compensation characteristics even in high-resolution displays with smaller pixel areas
Solution Approach 2:
The initialization circuit performs preliminary action by outputting an initialization signal to the first node before the data writing phase. This ensures that the storage capacitor is properly initialized before receiving data, preventing garbage data issues and ensuring accurate compensation characteristics are maintained from the start
2Ease of manufacture
If the number of mask plates is reduced to lower production cost, then the manufacturing process is simplified, but the storage capacitor cannot be made with proper thickness, resulting in poor compensation characteristic
Solution Approach 1:
The maintenance circuit serves multiple functions: it maintains the potential of the second node during the light emitting phase, provides a discharge path for the storage capacitor during initialization, and ensures proper biasing for the driving transistor. This multi-functionality allows the circuit to achieve good compensation characteristics without requiring additional specialized structures
Solution Approach 2:
The patent changes the operational parameters of existing circuit elements through the maintenance circuit. By dynamically adjusting the potential of the second node and controlling the discharge/charge state of the storage capacitor, the circuit achieves proper compensation characteristics without changing the physical structure or manufacturing process
Data Source
AI summary
A pixel circuit, a driving method thereof and a display panel are disclosed. In the pixel circuit, an initialization circuit is configured for outputting an initialization signal to a first node; a driving circuit is configured for initializing a second node through a first power signal, and outputting a driving current to a control circuit; a charging circuit is configured for outputting a data signal to the first node; a maintenance circuit is configured for maintaining a potential of the second node unchanged through the first power signal; and the control circuit is configured for receiving the driving current from the driving circuit and outputting it to a light emitting circuit so as to drive the light emitting circuit to emit light. Particularly, the maintenance circuit can maintain the potential of the second node unchanged, thereby ensuring that the driving circuit can output a stable driving current circuit.