Shared Data-Line Pixel Driving With Overlapping Scan Signals
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Solution Overview
Problem
Traditional display devices requiring pixels to share data lines necessitate additional multiplexing circuits, leading to increased power consumption, larger non-display area, and circuit complexity due to signal interference and delays.
Innovation Solution
Implementing a novel scanning and driving scheme where two pixels in the same row share a data line and operate using overlapping scan signals, eliminating the need for separate multiplexing circuits by structuring active periods of scan signals to overlap.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If additional multiplexing circuits are added to manage data distribution for pixels sharing data lines, then data transmission control is improved, but device complexity increases
Solution Approach 1:
The patent extracts and eliminates the multiplexing circuit from the display device by implementing a time-division multiplexing scheme through scan signals. The data driving circuit directly outputs data signals to shared data lines without requiring separate multiplexing circuits, as pixel selection is achieved through timing control of scan signals instead of additional circuitry.
2Reliability
If multiplexing circuits are added to prevent signal interference and manage data distribution, then signal integrity is improved, but power consumption increases
Solution Approach 1:
The patent removes the power-consuming multiplexing circuit by implementing timing-based pixel selection through scan signals. The data driving circuit directly drives shared data lines with data signals, and pixel activation is controlled by the timing overlap of scan signals rather than through additional active circuitry, thereby reducing overall power consumption.
3Reliability
If multiplexing circuits are implemented to manage data sharing, then data distribution control is improved, but the non-display area increases
Solution Approach 1:
The patent extracts the multiplexing circuit from the display device structure, eliminating the need for additional circuit elements within the pixel array. Data distribution control is achieved through the timing relationship of scan signals rather than through physical circuitry, thereby minimizing the non-display area and maximizing the display area.
4Device complexity
If scan signals are structured to overlap in active periods, then pixel selection without multiplexing circuits is achieved, but signal timing control complexity increases
Solution Approach 1:
The patent employs periodic scan signals with specifically designed timing relationships to achieve pixel selection. The scan signals are generated in a periodic sequence where the active periods of adjacent scan signals overlap, creating distinct time windows for activating different pixels sharing the same data line. This periodic timing scheme simplifies the control logic compared to complex circuitry while maintaining precise timing control.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This configuration reduces the non-display area, minimizes power consumption, and maintains efficient data transmission while eliminating the need for additional circuit elements for pixel selection.
Implementation Method 1
The organic light emitting display device may include a light emitting element, and the light emitting element may emit light by the recombination of electrons and holes
Data Source
AI summary
Disclosed is an electronic device including a first pixel connected to a data line and operating in response to a previous first scan signal, a current first scan signal, and a second scan signal, and a second pixel connected to the data line and operating in response to the current first scan signal, a next first scan signal, and the second scan signal. The first pixel and the second pixel are disposed in the same row. A first period in an active period of the current first scan signal overlaps an active period of the previous first scan signal. A second period of the active period of the k-th first scan signal overlaps an active period of the next first scan signal.