Emission Control Driver for OLED Display Simplification
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Solution Overview
Problem
Existing organic light emitting display devices have complex emission control driver configurations that require multiple control signals and voltages, making them difficult to simplify and optimize.
Innovation Solution
The emission control driver is designed with multiple stages that generate emission control signals using a combination of first and second voltages and clock signals, with each stage including a first signal processor, a second signal processor, and a third signal processor, which receive sub-control signals and output emission control signals sequentially through emission control lines, simplifying the configuration by using start signals and clock signals to generate emission control signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple control signals and voltages are used in the emission control driver, then the emission control function can be achieved, but the device complexity increases
Solution Approach 1:
The emission control driver is divided into multiple stages (first stage, second stage, third stage) that sequentially generate emission control signals. Each stage processes signals through specific signal processors (first, second, and third signal processors) that transform control signals into emission control signals. This segmentation allows the complex emission control function to be achieved through modular, sequential processing, reducing overall configuration complexity while maintaining functional reliability.
2Reliability
If multiple control signals are required for emission control, then precise emission timing can be controlled, but the ease of operation decreases
Solution Approach 1:
The driver uses a start signal to initialize the emission control process and clock signals to establish timing references before generating emission control signals. The first clock signal and second clock signal (shifted by half a period) provide predetermined timing information that enables precise emission timing control without requiring complex real-time control operations. This preliminary setup simplifies operation while maintaining accurate emission timing.
Solution Approach 2:
The emission control driver employs periodic clock signals (first clock signal and second clock signal with same frequency, second signal shifted by half period) to generate emission control signals in a sequential, periodic manner. This periodic action enables precise timing control through regular, predictable signal generation cycles, making the system easier to operate and manage while maintaining reliable emission timing control.
3Reliability
If a complex configuration is used to generate emission control signals, then emission control precision can be achieved, but the productivity decreases
Solution Approach 1:
The driver merges multiple signal processing functions into a unified sequential structure where the first signal processor, second signal processor, and third signal processor work together across multiple stages. This merging approach achieves emission control precision through coordinated signal processing while improving productivity by eliminating redundant control signals and optimizing the signal generation flow.
Solution Approach 2:
The emission control driver changes parameters such as voltage levels (first voltage and second voltage with different levels) and signal timing (using clock signals with specific periods and shifts) to generate precise emission control signals. By systematically varying these parameters across different stages and signal processors, the system achieves high precision emission control while maintaining efficient signal generation through optimized parameter sequences.
Data Source
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AI summary
An emission control driver includes stages sequentially outputting emission control signals through emission control lines. Each stage includes a first signal processor receiving a first voltage and generating first and second signals in response to first and second sub-control signals, a second signal processor receiving a second voltage having a level higher than a level of the first voltage and generating third and fourth signals in response to the third sub-control signal, the first signal, and the second signal, and a third signal processor receiving the first and second voltages and generating the emission control signal in response to the third and fourth signals. The first signal processor of each stage receives the emission control signal output from a previous stage as the first sub-control signal, and the first signal processor of a first stage among the stages receives a start signal as the first sub-control signal.