Integrated Shift Register for N/P OLED Display Control
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Solution Overview
Problem
Existing PMOS OLED internal compensation pixel circuits require two sets of GOA units (EM GOA and Gate GOA) for N-type and P-type outputs, leading to wide bezels and complex driving circuits, which are inefficient and high in power consumption.
Innovation Solution
A shift register design that integrates an input module, control modules, and light-emitting and gate control modules to provide both N-type and P-type outputs, simplifying the driving circuit and reducing bezel width.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If two sets of GOA units (EM GOA and Gate GOA) are used to provide N-type and P-type outputs, then the output functionality is ensured, but the bezel width increases and the driving circuit becomes complex
Solution Approach 1:
The patent merges the functions of EM GOA and Gate GOA into a single integrated shift register unit. The shift register generates both light-emitting control signals (N-type) and gate control signals (P-type) through unified control modules, eliminating the need for separate GOA units and reducing overall circuit complexity
Solution Approach 2:
The shift register is designed as a multi-functional unit that can simultaneously provide multiple types of control signals. The control modules within the shift register are configured to generate both light-emitting control signals and gate control signals, making a single device perform multiple functions that previously required separate dedicated units
2Adaptability or versatility
If two sets of GOA units are used to provide N-type and P-type outputs, then the output functionality is ensured, but the bezel width becomes wide
Solution Approach 1:
By combining EM GOA and Gate GOA functions into one shift register, the physical space previously occupied by two separate units is consolidated into a single compact unit, directly reducing the bezel width while maintaining all necessary output functionalities
3Loss of energy
If two sets of GOA units are used, then the driving circuit can achieve intelligent and low-power-consumption display, but the driving circuit process becomes complex
Solution Approach 1:
The shift register is designed as a universal control unit that handles multiple signal generation tasks within a single integrated circuit. This multi-functionality reduces the overall number of components and interconnections, simplifying the driving circuit process while maintaining the intelligent and low-power-consumption display capabilities
Data Source
AI summary
A shift register, a control method thereof, a light-emitting control circuit, and a display device are provided. The shift register includes: an input module, a first node, a second node, a first control module, a second control module, a third node, a light-emitting signal output module, and a gate control module. The input module is configured to receive an input signal and control potentials of the first node and the second node. The first control module is configured to control the potential of the second node based on the potential of the first node. The second control module is configured to control potentials of the first node and the third node and to control the gate control module to output a gate control signal. The light-emitting signal output module is configured to output a light-emitting control signal based on the potential of the second node or the third node.