Integrated Shift Register Layout for Narrow-Bezel OLED Gate Driving
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Solution Overview
Problem
The existing OLED gate driving circuits are complex and large in size, which hinders high-resolution and narrow bezel requirements due to the integration of three sub-circuits: sense, scan, and connection units, necessitating a more efficient chip area reduction.
Innovation Solution
A shift register design that integrates the functions of the sense, scan, and connection units into a single circuit, utilizing a first and second input sub-circuit to control output signals independently during display and blanking periods, sharing a common pull-up node to reduce circuit size.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If three sub-circuits (sense unit, scan unit, connection unit) are integrated in the gate driving circuit, then the gate driving circuit can perform all necessary functions, but the chip area becomes large and the circuit structure becomes complicated
Solution Approach 1:
The patent merges the sense unit, scan unit, and connection unit into a single integrated shift register circuit. The shift register simultaneously performs sensing, scanning, and signal connection functions that were previously handled by separate sub-circuits, thereby reducing the overall chip area while maintaining all necessary gate driving functions.
Solution Approach 2:
The shift register is designed as a universal circuit that performs multiple functions: it senses pixel states, scans through data, and connects signals to the gate driver. This multi-functional design eliminates the need for separate dedicated circuits for each function, directly reducing chip area.
2Adaptability or versatility
If three sub-circuits (sense unit, scan unit, connection unit) are integrated in the gate driving circuit, then all necessary functions are achieved, but the circuit structure becomes very complicated
Solution Approach 1:
The patent combines multiple functional units into a single shift register structure, reducing circuit complexity by eliminating the need for separate sense, scan, and connection circuits. The integrated design simplifies signal routing and control logic.
Solution Approach 2:
The shift register is divided into multiple stages (first shift register stage, second shift register stage, etc.), where each stage handles specific functions sequentially. This segmentation allows complex functionality to be achieved through a systematic, modular approach rather than a tangled monolithic structure.
3Ease of manufacture
If a conventional gate driving circuit with separate sub-circuits is used, then the circuit can be designed with standard modules, but it cannot satisfy the requirement for high resolution and narrow bezel
Solution Approach 1:
By merging the sense, scan, and connection units into a single shift register, the patent reduces the overall circuit footprint, enabling narrower bezels and higher display resolution while maintaining ease of manufacture through standardized shift register design.
Data Source
AI summary
Disclosed is a shift register, a gate driving circuit, a display apparatus and a driving method, the shift register including a first input sub-circuit, configured to receive a first input signal from a first input terminal and output an output blanking output control signal; a second input sub-circuit, configured to receive a second input signal from a second input terminal and output a display output control signal; a selection sub-circuit, having a first terminal connected to the second input sub-circuit, a second terminal connected to the first input sub-circuit, and a third terminal connected to a first node, configured to control a potential of the first node according to the display output control signal and the blanking output control signal; an output sub-circuit, configured to output a composite output signal via an output terminal under control of a first node.