Pixel Circuit Segmentation for Low-Frequency Display Power Reduction
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Solution Overview
Problem
Display panels experience power consumption issues and image quality degradation due to current leakage when the driving frequency is reduced for static images.
Innovation Solution
A pixel design incorporating a light emitting element, a driving switching element, a data initialization switching element, and a compensation switching element, where the compensation switching element is connected in series with the data initialization switching element to reduce current leakage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If the driving frequency of the display panel is decreased to reduce power consumption, then power consumption is reduced, but current leakage occurs causing flicker and degraded image quality
Solution Approach 1:
The pixel circuit is divided into multiple switching elements (driving switching element, data initialization switching element, compensation switching element, light emitting element initialization switching element) that operate independently at different timings. This segmentation allows each switching element to be optimized for specific functions, enabling low-frequency operation without current leakage while maintaining image quality.
Solution Approach 2:
The data initialization switching element and compensation switching element perform initialization actions before the driving switching element operates. By pre-initializing the control electrode and compensating for threshold voltage in advance, the circuit is prepared for low-frequency operation, preventing current leakage and flicker when the driving frequency is reduced.
2Use of energy by stationary object
If the driving frequency is decreased for static images, then power consumption is reduced, but current leakage causes flicker in the displayed image
Solution Approach 1:
The compensation switching element acts as an intermediary between the data initialization switching element and the driving switching element. It compensates for threshold voltage variations and prevents current leakage by controlling the charge transfer timing, enabling the display panel to operate at low frequencies without generating harmful current leakage effects.
Solution Approach 2:
The invention changes the operational parameters of the pixel circuit by introducing multiple switching elements with different activation timings. By adjusting the timing parameters of gate signals and optimizing the switching sequence, the circuit achieves low-power operation without current leakage, transforming the operational characteristics to eliminate harmful effects.
Data Source
AI summary
A pixel includes a light emitting element, a driving switching element, an initialization voltage terminal, a data initialization switching element set, and an adjustment switching element. The driving switching element may provide a driving current to the light emitting element. The adjustment switching element is electrically connected to the data initialization switching element in series. At least one of the data initialization switching element set and the adjustment switching element may control an electrical connection between the control electrode of the driving switching element and the initialization voltage terminal. A control electrode of the adjustment switching element is electrically connected to an input electrode of the adjustment switching element.