Shift Register Unit for Narrow Bezel OLED Panels
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Solution Overview
Problem
OLED panels face challenges with large numbers of transistors in shift register units, which occupy significant wiring area and increase manufacturing costs, making it difficult to achieve high-resolution displays with narrow bezels.
Innovation Solution
A shift register unit is designed with a simplified structure using a specific configuration of transistors and capacitors, reducing the number of transistors and clock signals required, thereby minimizing wiring area and simplifying manufacturing processes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If conventional shift register units with large numbers of transistors are used, then the gate driver circuit can perform its function, but the wiring area increases and manufacturing complexity increases
Solution Approach 1:
The patent extracts and eliminates redundant transistors from the conventional shift register unit structure. By carefully analyzing the circuit functions, the invention removes unnecessary switching elements while retaining the essential shift register operations, thereby reducing the total transistor count and associated wiring area without compromising functional performance
Solution Approach 2:
The patent merges multiple transistor functions into fewer integrated circuit elements. By combining certain switching and control functions into shared transistors and capacitors, the design achieves the same logical operations with a reduced component count, directly addressing the wiring area reduction goal
2Ease of manufacture
If conventional shift register units with large numbers of transistors are used, then the gate driver circuit can perform its function, but manufacturing costs and difficulty increase
Solution Approach 1:
The patent removes redundant transistors and simplifies the circuit architecture, making the manufacturing process less complex. Fewer transistors mean fewer fabrication steps, less stringent process control requirements, and lower defect rates, all of which contribute to reduced manufacturing difficulty and cost
Solution Approach 2:
The patent optimizes circuit parameters such as transistor sizing, capacitor values, and clock signal timing to ensure proper operation with the reduced transistor count. These parameter adjustments maintain functional equivalence while simplifying the manufacturing process by reducing process variability sensitivity
3Area of stationary object
If conventional shift register units are used, then sufficient driving capability is provided, but the effective display area decreases due to larger bezel requirements
Solution Approach 1:
By extracting and removing redundant transistors from the gate driver circuit, the patent reduces the space required for the driver circuitry. This space reduction allows for narrower bezels and increased effective display area while maintaining the driving capability needed for high-resolution OLED panels
Solution Approach 2:
The patent redistributes the gate driver circuit elements more efficiently in the available space, utilizing vertical stacking and optimized layout techniques. This dimensional reorganization maintains all necessary driving functions while minimizing the horizontal footprint, enabling narrower bezel designs
Data Source
AI summary
The present disclosure relates to a shift register, a gate driver circuit and a display panel. The shift register includes first to eighth transistors and first and second capacitors. In the exemplary embodiments of the present disclosure, a shift register unit is composed of a relatively small number of transistors and capacitors, and thus the wiring areas occupied by the shift register unit and the gate driver circuit composed of a plurality of the shift register units can be reduced, thereby providing technical support for designing display panels with higher resolution and narrower bezel. Meanwhile, because the shift register unit and the gate driver circuit have a relatively simple structure, the manufacturing processes can be simplified and thereby costs can be reduced.