OLED Driving Circuit Time-Sharing Pixel Control for Resolution
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The existing OLED panel technologies face limitations in reducing the size of driving transistors, which restricts resolution due to challenges in reducing storage capacitor sizes, potentially leading to unstable brightness.
Innovation Solution
A driving circuit with a pixel circuit that includes a data control circuit, a light emitting control circuit, and a driving transistor, where multiple light emitting devices share the same pixel circuit, allowing for time-sharing control and reduced occupied area, enabling higher resolution and improved brightness stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the size of driving transistors is reduced to increase resolution, then the number of pixels per unit area increases, but the storage capacitor size becomes too small to maintain stable brightness
Solution Approach 1:
The pixel circuit is segmented into two independent parts: a first pixel circuit for driving a first light emitting device and a second pixel circuit for driving a second light emitting device. Each pixel circuit contains its own storage capacitor and driving transistor, allowing independent optimization of each circuit's size and function.
Solution Approach 2:
Two pixel circuits are merged to share common components including a scanning signal line, reset signal line, data signal line, and emission control signal line. This sharing reduces the total area occupied by redundant signal lines and control circuits, enabling higher resolution without proportionally increasing circuit area.
2Area of stationary object
If more light emitting devices are added per pixel circuit to reduce area, then the occupied area decreases, but the control complexity increases
Solution Approach 1:
The light emitting devices are controlled to emit light in alternating periods: during a first light emitting period, the first light emitting device emits light while the second remains off; during a second light emitting period, the second light emitting device emits light while the first remains off. This periodic time-division multiplexing simplifies control logic compared to simultaneous control of multiple devices.
Solution Approach 2:
The scanning signal line, reset signal line, data signal line, and emission control signal line serve dual functions by being shared between the first and second pixel circuits. These universal signal lines reduce the total number of components needed while maintaining full control capability over multiple light emitting devices.
Data Source
AI summary
A driving circuit, a display panel, a driving method and a display device. The driving circuit includes a pixel circuit and a plurality of light emitting devices; the pixel circuit includes: a data control circuit, a light emitting control circuit and a driving transistor, wherein at least two light emitting devices share the same pixel circuit, and thus, the light emitting devices is driven by the pixel circuit to emit light; and due to the effect of the light emitting control circuit, the light emitting devices can be controlled to emit light in a time-sharing manner.