Display Panel Pre-Charge Switching Method for Power Reduction
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Solution Overview
Problem
Existing display systems face challenges in reducing power consumption due to excessive pre-charging times caused by large differences in gray-scale values between adjacent rows, leading to increased power consumption when the pre-charge line is kept at a high potential, and inefficient pre-charging when kept at a low potential.
Innovation Solution
A display panel with a timing controller that calculates a gray-scale eigenvalue based on parameters from adjacent rows, adjusting the pre-charge signal potential and scanning duration to dynamically optimize pre-charging, thereby reducing power consumption by determining whether to pre-charge pixel units in the next row based on gray-scale parameters.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the pre-charge line is kept at a high potential to enable pre-charging, then pre-charging function is activated, but power consumption increases due to excessively long pre-charge time when gray-scale difference is large
Solution Approach 1:
The pre-charge line potential is changed from a static state (always high or always low) to a dynamic state that switches between high and low potentials based on real-time gray-scale parameter detection. The timing controller continuously monitors gray-scale values of adjacent rows and dynamically adjusts the pre-charge signal accordingly, making the system adaptive to varying display content requirements.
Solution Approach 2:
The patent changes the potential parameter of the pre-charge line from a fixed value to a variable value that depends on the gray-scale difference between adjacent rows. When the gray-scale difference exceeds a threshold, the pre-charge line potential switches from high to low, thereby changing the operational state of the pre-charging function to match the actual display needs.
2Use of energy by moving object
If the pre-charge line is kept at a low potential to reduce power consumption, then pre-charging is disabled, but power consumption cannot be reduced effectively when pre-charging is needed
Solution Approach 1:
The timing controller implements a feedback mechanism by continuously detecting the gray-scale parameters of pixel units in adjacent rows and using this information to control the pre-charge line potential. The system monitors the gray-scale difference and feeds this information back to the pre-charge control logic, which then adjusts the pre-charge signal accordingly to maintain optimal power consumption while ensuring pre-charging function is available when needed.
Solution Approach 2:
The display system performs self-assessment by automatically detecting whether pre-charging is needed based on its own internal gray-scale parameter analysis. The timing controller evaluates the gray-scale values of adjacent rows and autonomously decides whether to activate or deactivate the pre-charge function, eliminating the need for external control or manual intervention.
3Reliability
If pre-charging is always performed to ensure display stability, then display stability is maintained, but power consumption increases due to unnecessary pre-charging operations
Solution Approach 1:
Instead of uniformly applying pre-charging to all pixel units regardless of their actual needs, the patent applies pre-charging selectively only to those pixel units where the gray-scale difference between adjacent rows exceeds a predetermined threshold. This localized approach ensures that pre-charging is performed only where necessary for display stability, avoiding wasteful energy consumption in regions where pre-charging is not needed.
Solution Approach 2:
The patent avoids excessive pre-charging by performing partial pre-charging only when the gray-scale difference warrants it. Rather than always performing full pre-charging operations, the system applies pre-charging selectively based on the actual gray-scale parameter analysis, thereby reducing unnecessary energy expenditure while maintaining display stability where required.
Data Source
AI summary
This application relates to a display panel and a pre-charge switching method for pixel units thereof. A timing controller of the display panel stores a gray-scale threshold. The timing controller calculates a gray-scale eigenvalue by using a first gray-scale parameter corresponding to pixel units in a first row and a second gray-scale parameter corresponding to pixel units in a second row, and pulls up a potential of a pre-charge signal when determining that the gray-scale eigenvalue satisfies a condition of the gray-scale threshold. A gate drive unit provides a scanning signal to a gate line in a second row within a period of providing a scanning signal to a gate line in a first row when the pre-charge signal is at a high potential.