PMOS Emission Control Line Driver for OLED Panel Mounting
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Solution Overview
Problem
Conventional emission control line drivers for organic light emitting displays are difficult to mount on panels due to their structure, limit high-speed driving, and consume excessive power due to static current.
Innovation Solution
A PMOS-based emission control line driver design that reduces load on clock driving circuits by using two clock signals for odd and even stages, allowing high-speed operation and minimizing power consumption by optimizing transistor configurations and capacitor usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a conventional emission control line driver is formed using both PMOS and NMOS transistors, then the driver can generate output signals, but the driver cannot be easily mounted on the panel and consumes large amounts of power due to static current
Solution Approach 1:
The driver circuit is segmented into multiple stages, with each stage independently controlled by clock signals. This segmentation allows the circuit to be optimized for low power consumption while maintaining mountability on the panel, as each stage can be designed with minimal transistor configurations
Solution Approach 2:
The driver uses periodic clock signals to control the emission control signals rather than continuous operation. By activating transistors only during specific clock periods, the circuit eliminates static current flow when not in use, significantly reducing power consumption while maintaining the ability to be mounted on the panel
2Speed
If the emission control line driver generates an output signal every one or more periods of a clock signal, then the driver can control emission, but the driver cannot be easily driven at high speed
Solution Approach 1:
The driver generates emission control signals at every clock period rather than skipping periods, achieving high-speed operation. The periodic clock signals continuously drive the transistor stages, eliminating delays while maintaining a relatively simple transistor-based configuration suitable for panel integration
Solution Approach 2:
The driver uses dynamic clock signal control to activate different transistor stages at different times. This dynamic operation allows high-speed signal generation through coordinated transistor switching, achieving fast response without requiring overly complex circuit configurations
3Weight of stationary object
If the emission control line driver is formed to be mounted on the panel, then the size and weight are reduced, but the driver must use fewer transistor types to simplify manufacturing
Solution Approach 1:
The driver is segmented into multiple independent stages that can be implemented using uniform transistor designs. This segmentation allows the entire driver to be mounted on the panel with reduced weight, while each stage uses a standardized transistor configuration that simplifies manufacturing processes
Solution Approach 2:
The driver changes its operational parameters by using clock signal timing rather than complex transistor type variations. This allows the circuit to achieve diverse functions with a limited transistor types, reducing overall device complexity and weight for panel mounting while maintaining full functionality
Data Source
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AI summary
An emission control line driver capable of being mounted on a panel, of improving driving speed, and of minimizing power consumption. The emission control line driver includes stage circuits each having clock, inverted clock, and start pulse inputs and each generating an emission control signal pulse. The stage circuits are cascaded to provide a series of emission control signal