Integrated Shift Register Unit for Narrow Frame OLED Displays
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Solution Overview
Problem
The existing OLED display technology faces challenges in cost increase and design constraints due to complex circuit structures required for bonding driving circuits, which hinder narrow frame designs and efficient display performance.
Innovation Solution
A shift register unit with integrated reset and scan signal sub-units, utilizing a specific configuration of transistors and capacitors to output reset and line scan signals with only two clock signal terminals, simplifying the circuit structure and reducing costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If bonding technology is used to provide separate driving circuits for reset signals and scan signals, then the display performance is improved, but the circuit structure becomes complex and cost increases
Solution Approach 1:
The patent combines the reset signal driving circuit and scan signal driving circuit into a single integrated shift register unit. This unit uses shared components including transistors T1-T7, capacitors C1-C2, and common clock signal terminals to generate both reset signals (via the RESET terminal) and scan signals (via the GATE terminal), eliminating the need for separate bonding circuits and reducing overall system complexity.
Solution Approach 2:
The shift register unit performs multiple functions simultaneously: it generates reset signals for pixel circuit initialization, produces scan signals for row-by-row pixel activation, and uses shared clock signal terminals (CK1, CK2) and voltage terminals (VGL, VGH) to control both functions. This multi-functional design reduces the number of required external connections and bonding interfaces.
2Reliability
If bonding technology is used to provide separate driving circuits, then the display performance is improved, but manufacturing cost increases
Solution Approach 1:
By merging the reset signal generation and scan signal generation into a single shift register unit that can be fabricated as one integrated circuit block on the OLED panel, the patent eliminates the need for separate bonding processes for multiple driving circuits. This reduces manufacturing complexity and associated costs while maintaining the required display performance.
3Reliability
If bonding technology is used for separate driving circuits, then the display performance is improved, but narrow frame design becomes difficult
Solution Approach 1:
The integrated shift register unit consolidates multiple driving functions into a single compact circuit block that occupies minimal non-display area. By sharing transistors, capacitors, and clock terminals between reset and scan signal generation, the design reduces the space required in the frame non-display area, enabling narrower frame designs while maintaining full display performance.
Data Source
AI summary
Embodiments of the present disclosure provide a shift register unit and a driving method thereof, a gate driving circuit and a display apparatus. The shift register unit includes a reset signal sub-unit and a scan signal sub-unit. The reset signal sub-unit includes a first input module, a first output module, and a first control module. The scan signal sub-unit includes a second input module, a second output module, and a second control module. The first input module is connected with the first control module, the first output module, and a signal input terminal. Both the first output module and the first control are connected with the scan signal sub-unit and a reset signal terminal. The second input module is also connected with the second output module and the second control module. Both the second output module and the second control module are connected with a signal output terminal.