Display Panel Driver Bias Control for Hysteresis Compensation
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Solution Overview
Problem
Existing display technologies face challenges in addressing the technical issues of hysteresis in display quality and reducing power consumption, particularly in the context of display apparatus, particularly in the context of display apparatus, where the hysteresis characteristic of driving switching elements leads to luminance deviations and increased power consumption due to repetitive initialization and threshold voltage compensation operations.
Innovation Solution
A display apparatus and electronic apparatus that compensates for the hysteresis characteristic of driving switching elements by adjusting the voltage applied to these elements after image transitions, reducing the need for repetitive initialization and threshold voltage compensation, thereby enhancing display quality and reducing power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If initialization operation and threshold voltage compensation operation are repetitively performed to compensate hysteresis characteristic, then display quality is improved, but power consumption is increased
Solution Approach 1:
The patent applies preliminary action by adjusting the bias voltage before the image transition occurs (when grayscale changes from low to high). Specifically, when the grayscale value increases, the bias voltage is increased in advance to prevent threshold voltage shifts caused by hysteresis, thereby eliminating the need for repetitive initialization and compensation operations during normal operation.
Solution Approach 2:
The patent changes the bias voltage parameter dynamically based on image content characteristics. When detecting a transition from low grayscale to high grayscale, the bias voltage is increased to compensate for hysteresis effects. This parameter adjustment prevents luminance deviations without requiring continuous repetitive compensation operations.
2Manufacturing precision
If initialization operation and threshold voltage compensation operation are repetitively performed, then hysteresis characteristic is compensated, but luminance deviation occurs according to driving frequency in variable frequency driving method
Solution Approach 1:
The patent implements dynamic bias voltage adjustment based on real-time detection of image transitions. Instead of using fixed frequency compensation operations, the system dynamically adjusts the bias voltage when grayscale transitions are detected, making the compensation mechanism adaptive to varying driving frequencies and image content, thereby maintaining luminance stability across different operating conditions.
Solution Approach 2:
The system uses feedback by monitoring image transitions (grayscale changes) and adjusting the bias voltage accordingly. When a transition from low to high grayscale is detected, the feedback mechanism triggers a bias voltage increase to compensate for hysteresis, ensuring consistent display performance regardless of driving frequency variations.
Data Source
AI summary
A display apparatus includes a display panel and a display panel driver. The display panel includes a pixel including a light-emitting element and a driving switching element. The display panel driver determines an image transition of a display image of the display panel and changes a voltage applied to the driving switching element in a frame after the image transition when the image transition occurs.