Projection Apparatus Brightness Control With Aperture–Current Mapping
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Solution Overview
Problem
Brightness adjustment in projection apparatuses leads to color deviation in projected images, degrading the display effect.
Innovation Solution
Adjust the aperture diameter of the projection apparatus based on a predetermined configuration mapping relationship to determine a target aperture diameter and drive current, ensuring white balance and reducing or eliminating color deviation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the brightness of the projection apparatus is adjusted, then the brightness of the projection image is improved, but color deviation occurs in the projection image
Solution Approach 1:
The patent applies parameter changes by adjusting both the aperture diameter and the drive current of the colored light source simultaneously. When brightness needs to be adjusted, the system changes multiple parameters (aperture size and current) in a coordinated manner according to preset mapping relationships, ensuring that color temperature remains stable while brightness changes, thus resolving the contradiction between brightness adjustment and color accuracy
Solution Approach 2:
The patent implements preliminary action by pre-establishing mapping relationships between aperture diameters, drive currents, and white balance parameters. Before actual brightness adjustment occurs, the system has already configured the corresponding current values for different aperture sizes to maintain color accuracy. This pre-prepared mapping data allows the system to quickly switch between brightness levels without color deviation
Data Source
AI summary
Disclosed are a method and an apparatus for adjusting brightness of a projection apparatus and a storage medium. The method is applied to the projection apparatus, wherein the projection apparatus has a light source and an aperture, the light source includes a colored light source, and the method includes: determining, based on an obtained first brightness level, a target aperture diameter of the aperture corresponding to the first brightness level; determining, based on a preset first configuration mapping relationship, a first drive current corresponding to the target aperture diameter, wherein the first configuration mapping relationship includes correspondences between aperture diameters and drive currents for driving the colored light source to enable an image projected by the projection apparatus to achieve white balance; and controlling an aperture diameter of the aperture to act to the target aperture diameter, and driving the colored light source by using the first drive current.