Pixel-Driving Circuit Alternating Sub-Cycles for Frequency Reduction
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Solution Overview
Problem
The driving frequency of existing pixel-driving circuits is too high, leading to limitations in achieving high resolution and sub-cycles for Mini-LED display devices due to the short refresh time of the smallest sub-cycle in pulse width modulation (PWM) driving modes.
Innovation Solution
A pixel-driving circuit is designed with a switching circuit and a driving circuit that alternately provides pulse signals with odd and even sub-cycles, reducing the driving frequency by increasing the duty cycle of the smallest sub-cycle, thereby reducing the overall driving frequency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If sub-cycles with different periods are used in PWM driving mode, then brightness can be guaranteed without loss, but the refresh time of the smallest sub-cycle is too short resulting in very high driving frequency
Solution Approach 1:
The patent divides the driving signals into two separate data signals (first data signal and second data signal) that are alternately provided to the pixel-driving circuit. Each data signal contains pulse signals with different sub-cycle configurations, allowing the system to segment the refresh operations and extend the minimum refresh time while maintaining overall brightness through alternating updates.
2Manufacturing precision
If high driving frequency is used to achieve high resolution and multiple sub-cycles, then display quality can be improved, but it requires high-frequency chips that are difficult to manufacture and operate
Solution Approach 1:
The patent employs dynamic switching between two different data signals with alternating sub-cycle configurations. This dynamic approach allows the system to adaptively manage refresh timing across different sub-cycles, effectively distributing the high-resolution rendering load over time without requiring the entire system to operate at peak frequency simultaneously, thereby reducing chip frequency requirements while maintaining display quality.
Data Source
AI summary
A pixel-driving circuit and a display device are provided. The pixel-driving circuit includes a switching circuit and a driving circuit. The switching circuit is activated according to one of first and second scan signals to provide a corresponding one of first and second data signals. The driving circuit is connected with the switching circuit and a light-emitting component, and generates a driving current according to the corresponding one of the first and second data signals to drive the light-emitting component. In driving periods of the first and second data signals, the first and second data signals are pulse signals having sub-cycles with different driving periods. By providing the first and second data signals with different time sequence of the sub-cycles to alternately drive the light-emitting component, a ratio cycle of the smallest sub-cycle is enhanced, thereby reducing the driving frequency.