Self-Luminous Display Multiplexing Timing to Prevent Data Voltage Interference
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Solution Overview
Problem
The emission signals from self-luminous pixel circuits in a display device interfere with the data voltage transmission due to overlapping pulse edges, affecting the display performance.
Innovation Solution
The display device staggered the pulse edges of multiplexing control signals and emission signals to ensure a charge discharge time gap between the edges, reducing interference on the data voltage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If multiplexer circuits are used to reduce the number of pins on the source driver, then the device complexity is reduced, but the emission signals interfere with the data voltage transmission
Solution Approach 1:
The patent applies periodic action by using multiplexing control signals to sequentially activate different data lines in a time-division manner. The multiplexer circuits switch between different data lines based on control signals, allowing the same physical line to carry different data voltages at different times. This periodic switching enables reduced pin count while maintaining data transmission functionality.
Solution Approach 2:
The patent applies preliminary action by introducing precharge pulses before the actual data voltage transmission. The precharge pulse prepares the data line by charging it to a known state before the emission signal is activated. This preliminary charging action ensures that the data line is in a stable state ready to receive the data voltage, preventing interference from the emission signal.
2Speed
If emission signals are transmitted simultaneously with data voltage, then the display response time is reduced, but the data voltage transmission is affected
Solution Approach 1:
The patent applies preliminary action by introducing precharge pulses before the emission signal is activated. The precharge pulse charges the data line to a known state in advance, ensuring that when the emission signal is transmitted, the data line is already prepared and stable. This preliminary charging prevents the emission signal from interfering with the data voltage transmission, maintaining both speed and reliability.
Solution Approach 2:
The patent applies the intermediary principle by introducing the precharge pulse as a mediator between the data voltage transmission and the emission signal. The precharge pulse acts as an intermediate step that prepares the data line before the emission signal is activated, creating a buffer zone that prevents direct interference between the data voltage and emission signal. This mediator ensures clean signal transmission while maintaining fast response time.
3Object-generated harmful factors
If the pulse edges of emission signals are staggered from multiplexing control signals, then the interference on data voltage is reduced, but the control signal timing complexity increases
Solution Approach 1:
The patent applies preliminary action by setting the precharge pulse timing in advance before the emission signal is activated. The precharge pulse is generated based on predetermined timing relationships with the multiplexing control signals, creating a buffer zone that prevents interference. This preliminary timing setup simplifies the overall control signal timing by establishing clear temporal boundaries before the critical emission signal transmission.
Solution Approach 2:
The patent applies segmentation by dividing the control signal timing into distinct segments: precharge pulse generation, multiplexing control signal activation, and emission signal transmission. Each segment is separated by defined time intervals, creating clear temporal boundaries that prevent interference. This segmentation of the timing sequence makes the control signal timing more manageable and less complex by breaking down the overall timing into discrete, controllable segments.
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 approach minimizes the impact of emission signal edges on data voltages, enhancing display stability and performance by allowing complete charge discharge during horizontal scanning.
Implementation Method 1
the pixel array has a plurality of self-luminous pixel circuits arranged in an array
Data Source
AI summary
A display device is provided. The display device includes a pixel array, a multiplexer circuit, and a plurality of emission driving circuits. The multiplexer circuit receives a plurality of data voltages and a plurality of multiplexing control signals to provide the data voltages to self-luminous pixel circuits of the pixel array based on the multiplexing control signals. The emission driving circuits provides a plurality of emission signals to the self-luminous pixel circuits. During a horizontal scanning period, a first edge and a second edge of an emission pulse formed on the corresponding one of the emission signals, wherein the first edge and the second edge are at least one charge discharge time far away from second multiplexing edges of a precharge pulse and multiplexer pulses.