Luminance Compensation for Display Backlight Stability
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Display devices experience unstable luminance during the initial start-up period due to varying times required for backlight modules to reach a stable state, affecting professional users of computer graphics.
Innovation Solution
A luminance compensation method that establishes a time-varying luminance sequence and operating luminance sequence through sampling display devices, generating a driving condition value look-up table to create a compensation sequence that stabilizes backlight module luminance by adjusting driving conditions during the initial start-up period.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the backlight module is operated during the initial start-up period, then the display device can be used, but the luminance value is unstable
Solution Approach 1:
The system performs preliminary measurement and characterization of the backlight module's luminance behavior during the start-up period. By pre-establishing the time-varying luminance sequence through measurements on sampled display devices, the system prepares compensation data before actual use, enabling stable luminance output from the beginning without requiring a warm-up period.
Solution Approach 2:
The system implements a feedback mechanism by continuously monitoring the actual luminance output during the start-up period and comparing it with the target luminance value. Based on the deviation detected, the system dynamically adjusts the driving condition values of the backlight module in real-time, ensuring that the luminance remains stable throughout the start-up period rather than reaching stability only after the initial period expires.
2Speed
If the backlight module is driven at high luminance during start-up, then the display becomes visible faster, but the luminance varies significantly over time
Solution Approach 1:
The system applies dynamic driving condition values that change over time during the start-up period. Instead of using a fixed high luminance setting, the system adjusts the driving condition values according to the time-varying luminance sequence, allowing the backlight module to operate at different luminance levels at different times. This dynamic adjustment ensures that the luminance remains consistent and predictable throughout the start-up period while still achieving fast visibility.
Data Source
AI summary
A luminance compensation method is provided. The luminance compensation method includes: establishing a time-varying luminance sequence according to an average luminance value of a plurality of sampled display devices in each unit time during an initial start-up period; establishing an operating luminance sequence according to an average operating luminance value of the sampled display devices under a plurality of different driving condition values after the initial start-up period; generating a driving condition value look-up table according to the time-varying luminance sequence and the operating luminance sequence; and obtaining compensation driving condition values in each unit time according to the driving condition value look-up table and the time-varying luminance sequence and accordingly establishing a time-varying compensation sequence, such that a display device drives a backlight module according to the time-varying compensation sequence in each time unit during the initial start-up period.