Projector Luminance Control via Content-Aware Threshold Adjustment
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Solution Overview
Problem
Existing projectors lack effective self-adaptive adjustment capabilities for luminance and contrast, leading to poor projection effects and complex operation due to manual or automatic luminance adjustments based on light sensation, which fail to meet user-specific requirements for image clarity and comfort.
Innovation Solution
A self-adaptive adjustment method and device for projectors that acquires the luminance average value of a current picture, calculates differences, and adjusts projection and image luminance, as well as contrast, using preset threshold values to automatically optimize the image for better clarity and user experience.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the power is increased to improve projection luminance, then the projection luminance is improved, but the power consumption is increased and battery duration is reduced
Solution Approach 1:
The system dynamically changes the projection luminance parameter based on environmental light conditions and picture content characteristics. By analyzing the luminance distribution of the picture and comparing it with environmental light levels, the system automatically adjusts the projection luminance to an optimal value, avoiding constant high power consumption while maintaining adequate image quality.
Solution Approach 2:
The projector performs self-diagnosis and self-adjustment of luminance parameters without user intervention. The control unit automatically analyzes picture content, detects environmental light conditions, and adjusts projection luminance accordingly, eliminating the need for manual user adjustment and enabling the system to serve itself in optimizing display quality versus power consumption.
2Illumination intensity
If manual adjustment manner is used to optimize image luminance, then the image luminance can be optimized, but the operation is troublesome and wastes time and labor
Solution Approach 1:
The projector automatically performs luminance optimization without requiring user operation. The control unit analyzes picture content characteristics and environmental light conditions, then automatically adjusts projection luminance and image luminance parameters, completely eliminating manual adjustment operations while maintaining optimal image quality.
Solution Approach 2:
The system implements a feedback mechanism where the control unit continuously monitors picture content characteristics (such as luminance distribution) and environmental light conditions, then uses this feedback information to automatically adjust luminance parameters. This closed-loop control ensures optimal image luminance without user intervention.
3Ease of operation
If automatic adjustment manner according to light sensation is used, then the operation is simplified, but the luminance adjustment is useless because the luminance in a particular environment is fixed and does not adapt to different picture requirements
Solution Approach 1:
The system segments the luminance control into two independent dimensions: environmental light condition detection and picture content analysis. By separately analyzing both factors and combining their results, the system achieves both automatic operation simplicity and adaptability to different picture requirements, overcoming the limitation of fixed environmental-based adjustment.
Solution Approach 2:
The system transforms the static environmental light-based adjustment into a dynamic multi-factor adjustment mechanism. It continuously adapts to both environmental changes and picture content variations, making the luminance adjustment flexible and context-aware rather than fixed, thereby achieving both ease of operation and high adaptability.
4Illumination intensity
If the projector displays bright pictures in a bright scene, then the picture luminance is sufficient, but the user eyes will be uncomfortable and the overall picture luminance is homogeneous making various objects cannot be clearly distinguished
Solution Approach 1:
The system dynamically changes not only the overall projection luminance but also the image luminance parameters based on the relationship between picture brightness and environmental light. When detecting bright pictures in bright environments, it adjusts both parameters to reduce overall luminance output, preventing user eye discomfort while maintaining object distinguishability through contrast optimization.
Data Source
AI summary
Disclosed are a self-adaptive adjustment method and device of a projector, and a computer storage medium. The method includes: acquiring a luminance average value of a current picture, and calculating an absolute value of a difference between the luminance average value and a preset normal luminance average value; simultaneously adjusting the projection luminance and the image luminance if the absolute value is greater than or equal to a first preset threshold value; only continuously adjusting the projection luminance if the absolute value is greater than or equal to a second preset threshold value and less than the first preset threshold value; only adjusting the image luminance if the absolute value is greater than or equal to a third preset threshold value and less than the second preset threshold value; forbidding the luminance adjustment if the absolute value is less than the third preset threshold value.