Color-Adaptive Projection Light Control for Blue-Light and Power Reduction
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Solution Overview
Problem
Existing laser projectors pose a risk of eye damage due to high power output, particularly from blue light, and inefficient power consumption.
Innovation Solution
A projection apparatus and method that adjusts the luminance of light sources based on color data to reduce blue light emission and power consumption by using a controller to modify driver signals for light sources, specifically controlling the luminance of blue, red, and green light sources.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If high power output is used in laser projectors, then illumination intensity is improved, but eye damage risk increases
Solution Approach 1:
The patent applies dynamics by making the light source luminance adjustable rather than fixed. The controller dynamically modifies the driver signal to the light source based on real-time color data, enabling the system to adapt illumination intensity to specific color requirements. This allows high illumination when needed while reducing blue light emission to protect eyes, resolving the contradiction between intensity and eye safety.
Solution Approach 2:
The patent changes the luminance parameter of the light source based on color data. By modifying the driver signal according to the color information from the projection module, the system adjusts the luminance to reduce blue light emission while maintaining necessary illumination for image projection, thus addressing both illumination intensity and eye protection requirements.
2Illumination intensity
If high power output is used in laser projectors, then illumination intensity is improved, but power consumption increases
Solution Approach 1:
The system dynamically adjusts the light source luminance based on the actual color data required for projection. Instead of operating at constant high power, the controller modulates the driver signal to match the illumination needs of different colors, reducing unnecessary power consumption while maintaining sufficient illumination intensity for the projection task.
Solution Approach 2:
The patent changes the luminance parameter dynamically according to color data, which directly impacts power consumption. By adjusting the light source output to match the specific color requirements rather than maintaining constant high power, the system achieves lower overall power consumption while preserving necessary illumination intensity for quality projection.
3Object-affected harmful factors
If blue light luminance is reduced, then eye damage risk is decreased, but illumination intensity deteriorates
Solution Approach 1:
The patent applies local quality by selectively reducing blue light luminance while maintaining or adjusting the luminance of other colors (red and green). The controller independently controls the driver signal for each color based on the color data, allowing localized reduction of harmful blue light without compromising the overall illumination intensity needed for the projection image.
Solution Approach 2:
The system dynamically adjusts the luminance of different colors based on real-time color data from the projection module. When blue light needs to be reduced for eye protection, the controller simultaneously compensates by adjusting red and green light output, maintaining the overall illumination intensity required for quality projection while locally reducing harmful blue light emission.
Data Source
AI summary
A projection apparatus and a projection method are provided. The projection apparatus includes a projection module, a driver circuit, and a controller. The projection module is configured to emit an image beam to form a projection picture according to a display data. The display data includes a first color data corresponding to a first color. The driver circuit is coupled to a light source of the projection module. The light source includes a first light source corresponding to the first color. The driver circuit is configured to provide a first driving signal to control a luminance of the first light source. The controller is coupled to the driver circuit. The controller is configured to receive the display data and adjust the first driving signal according to the first color data.