Projection Apparatus Black Floating Suppression via Dual Panel Control
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Solution Overview
Problem
Existing projection systems face challenges in suppressing black floating in overlap regions without degrading image contrast, as black floating correction methods increase luminance in non-overlap regions, leading to undesirable image quality.
Innovation Solution
A projection apparatus with a first and second panel, a projection optical system, and control units that acquire light reduction information and adjust the panels' settings to control luminance in overlap regions, ensuring edge blending processing is performed regardless of pixel values, thereby preventing black floating and maintaining image contrast.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If black floating correction processing is performed to raise the luminance of the non-overlap region, then the luminance level difference between overlap and non-overlap regions is reduced, but the contrast of the image is degraded
Solution Approach 1:
The patent applies different luminance adjustment strategies to different regions: the overlap region maintains its original luminance characteristics while the non-overlap region undergoes selective luminance enhancement only where black displays are detected. This localized approach prevents global contrast degradation while achieving local luminance balance.
Solution Approach 2:
Instead of uniformly raising luminance across the entire non-overlap region, the patent applies luminance enhancement only to specific areas where black displays are detected, using partial action to achieve the desired effect without excessive luminance increase that would harm overall image contrast.
2Stability of the object's composition
If gradation processing is applied to reduce luminance in the overlap region, then the luminance level difference becomes inconspicuous, but it is not possible to correct the luminance level difference when black displays are overlapped
Solution Approach 1:
Instead of reducing luminance in the overlap region (traditional gradation processing), the patent inverts the approach by enhancing luminance in the non-overlap region where black displays are detected. This inversion allows effective black floating correction without the limitations of traditional methods.
Solution Approach 2:
The patent dynamically changes the luminance parameter selectively in the non-overlap region based on detected black display areas, adjusting only the necessary portions to achieve precise black floating correction while maintaining overall image quality.
3Object-affected harmful factors
If a liquid crystal panel is provided in the projector to perform light shielding, then periphery light shielding is achieved, but the operation becomes troublesome as users must manually set the shielded region
Solution Approach 1:
The system performs automatic detection of black display regions and autonomously determines the appropriate shielded area, eliminating the need for manual user configuration. The projector self-adjusts the light shielding parameters based on the detected overlap region characteristics.
Solution Approach 2:
The system uses feedback from the detected black display regions to automatically adjust the light shielding parameters, creating a closed-loop control system that adapts to the actual projection conditions without requiring manual intervention.
Data Source
AI summary
A projection apparatus that projects a projection image includes a first panel, a second panel, a projection optical system that projects light that has passed through the first panel and the second panel, an information acquisition unit that acquires light reduction information of a region which is a part of the projection image and overlaps with an image projected by another projection apparatus, and a panel control unit that controls the first panel based on data of the projection image and controls the second panel based on the light reduction information.