Shift Register Unit Node Stabilization for OLED Display Uniformity
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current gate driving circuits for OLED displays face challenges in achieving high resolution and narrow bezel designs due to complex circuit structures, leading to issues such as poor display effects and uneven brightness caused by progressive sequential compensation methods.
Innovation Solution
A shift register unit with a specific configuration including a first input circuit, output circuit, control circuit, reset circuit, second input circuit, transmission circuit, and storage circuit is used to stabilize node levels, enabling random compensation and preventing multiple signal outputs, thus improving display quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If progressive sequential compensation method is used, then gate driving circuit can be implemented, but display uniformity deteriorates due to uneven brightness and scanning lines
Solution Approach 1:
The patent applies preliminary action by stabilizing node levels before signal output through dedicated storage circuits (first storage circuit connected to first node, second storage circuit connected to second node). These circuits prepare and maintain stable voltage levels in advance, preventing the uneven brightness and scanning line issues that occur with progressive sequential compensation methods.
2Manufacturing precision
If complex circuit structure is used to achieve high resolution, then display resolution improves, but device complexity increases leading to manufacturing difficulties
Solution Approach 1:
The patent segments the gate driving circuit into distinct functional modules: first input circuit, output circuit, first control circuit, first reset circuit, second input circuit, second control circuit, and second reset circuit. Each module handles specific functions independently, which simplifies the overall design and manufacturing while achieving high resolution through the coordinated operation of these segmented components.
3Productivity
If multiple signal outputs occur, then signal transmission coverage increases, but display quality deteriorates due to signal interference
Solution Approach 1:
The patent implements feedback mechanisms through reset circuits that monitor and correct node levels. The first reset circuit resets the first node based on feedback from the second node level, and the second reset circuit resets the second node based on feedback from the first node level. This feedback control prevents multiple unintended signal outputs while maintaining proper signal transmission coverage.
Data Source
Figure 1
Figure 2
Figure 3
AI summary
Provided are a shift register unit (10), a gate drive circuit (20), a display apparatus (1) and a drive method. A level of a second node (QB) can be better stabilized. The shift register unit (10) comprises a first input circuit (110), an output circuit (120), a first control circuit (130), a first reset circuit (140), a second input circuit (150), a transmission circuit (160) and a storage circuit (170), wherein the first input circuit (110) is configured to control a level of a first node (Q) in response to a first input signal (STU1); the output circuit (120) is configured to provide an output signal at an output end (OP) under the control of the level of the first node (Q); the first control circuit (130) is configured to control a level of a second node (QB) under the control of the level of the first node (Q); the first reset circuit (140) is configured to reset the first node (Q) and the output end (OP) under the control of the level of the second node (QB); and the storage circuit (170) is electrically connected to the second node (QB) and is configured to stabilize the level of the second node (QB).