Emission Controller Circuit Overlap Prevents Luminance Deviation
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Solution Overview
Problem
Existing display technologies face issues where the luminance of sub-pixels deviates from standard values due to signal delays, leading to degraded display performance as sub-pixels emit light in response to incomplete data signals.
Innovation Solution
The emission controller employs cascaded emission control circuits with additional processing modules and a gating module, utilizing multiple clock signal lines to synchronize emission control signals, ensuring high-level signals from neighboring circuits overlap, thus preventing sub-pixels from emitting light before data signals are fully written.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If emission control circuits operate with sequential signal transmission, then the emission controller can control sub-pixels to emit light in sequence, but signal delays cause luminance deviation from standard values
Solution Approach 1:
The patent applies preliminary action by overlapping the high-level emission control signal from the current circuit with the high-level signal from the previous circuit. This ensures that the sub-pixels receive a continuous high-level signal throughout the data writing period, preventing luminance deviation caused by signal delays. The emission control signal is advanced to overlap with the previous signal, ensuring data is fully written before emission begins.
2Manufacturing precision
If additional processing modules and gating modules are added to synchronize signals, then luminance precision is improved, but device complexity increases
Solution Approach 1:
The patent segments the emission control function into multiple independent circuits (first, second, third emission control circuits) with dedicated processing modules. Each circuit has its own first processing module, second processing module, and gating module that operate independently but coordinate through signal overlap. This segmentation allows precise control of each circuit's timing while maintaining overall system functionality.
Solution Approach 2:
The gating module acts as an intermediary between the first and second processing modules. It receives signals from both modules and generates the final emission control signal by combining them. The gating module mediates the interaction between overlapping signals, ensuring proper timing and preventing direct conflict between the sequential circuits.
3Productivity
If sub-pixels emit light in response to emission control signals, then display output is achieved, but luminance deviates from standard values due to incomplete data signals
Solution Approach 1:
The patent ensures data signals are fully written to sub-pixels before emission begins by overlapping the high-level emission control signal with the previous circuit's high-level signal. This preliminary action of advancing the emission signal timing guarantees that all data is ready before sub-pixels start emitting light, preventing luminance deviation and improving display quality reliability.
Data Source
AI summary
The embodiments of the present disclosure provide an emission controller, a control method thereof and a display device, capable of preventing luminance of sub-pixels from deviating from its standard value and improving display quality. The emission controller includes a plurality of emission control circuits each including: a first processing module configured to receive a first voltage signal, provide a first signal to a first node and a second signal to a second node; a second processing module configured to provide a third signal to a third node; a third processing module configured to receive a second voltage signal and provide a fourth signal to the first and third nodes; a fourth processing module configured to pull down signal at the first node; and a gating module configured to receive the first voltage signal and the second voltage signal and provide an emission control signal to the emission control signal terminal.