Integrated Shift Register for OLED Scan and Light Emission Signals
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Solution Overview
Problem
Current OLED display panels face challenges in efficiently managing scan and light emission signals, leading to increased circuit complexity and border width due to separate circuits for these functions.
Innovation Solution
A shift register element with integrated input, control, scan signal output, and light emission signal output modules, utilizing clock signals to synchronize and stabilize node potentials, allowing simultaneous output of scan and light emission signals, thereby reducing circuit complexity and border width.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate gate driver circuit and light emission driver circuit are arranged in non-display area, then reliable signal provision is achieved, but device complexity and border width increase
Solution Approach 1:
The patent combines the gate driver circuit and light emission driver circuit into a single integrated shift register element. The shift register element includes both a scan signal output module (for gate driver function) and a light emission signal output module (for light emission driver function), allowing both functions to be performed by one unified circuit structure rather than separate circuits.
Solution Approach 2:
The shift register element is designed as a multi-functional module that simultaneously provides gate driver functionality (through scan signal output) and light emission driver functionality (through light emission signal output). This universal design allows a single circuit element to perform multiple previously separate functions, reducing overall system complexity.
2Reliability
If separate gate driver circuit and light emission driver circuit are arranged in non-display area, then reliable signal provision is achieved, but border width increases
Solution Approach 1:
The patent combines the gate driver circuit and light emission driver circuit into a single integrated shift register element. The shift register element includes both a scan signal output module (for gate driver function) and a light emission signal output module (for light emission driver function), allowing both functions to be performed by one unified circuit structure rather than separate circuits.
3Device complexity
If integrated shift register element is used, then circuit complexity and border width are reduced, but simultaneous output of scan and light emission signals must be achieved
Solution Approach 1:
The shift register element is segmented into distinct functional modules: an input module with first and second nodes, a control module, a scan signal output module, and a light emission signal output module. Each module has dedicated terminals and switching elements that operate independently yet cooperatively, enabling simultaneous signal generation without functional interference.
Solution Approach 2:
The circuit employs dynamic control through clock signals (first clock signal terminal and second clock signal terminal) that sequentially control the switching elements. This dynamic operation allows the circuit to transition between different states and simultaneously drive both scan and light emission outputs without signal conflict.
Data Source
AI summary
Disclosed are a shift register element, a gate driver circuit, and an organic electroluminescent display panel, and the shift register element includes: a first input module, a first control module, a first scan signal output module, and a first light emission signal output module, or a second input module, a second control module, a second scan signal output module, and a second light emission signal output module, where these four modules can cooperate with each other to output both a scan signal and a light emission signal so as to lower the complexity of the circuit, to reduce a space to be occupied, and to facilitate a design of a display panel with a narrow border.