Projector Brightness Adjustment via Light Sensor Feedback
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Solution Overview
Problem
Conventional projector systems combining images from multiple projectors often suffer from color and brightness irregularities due to differing characteristics among projectors, leading to segmented images and reduced viewer comfort.
Innovation Solution
A projector system incorporating a light source module, color wheel module, brightness adjusting device, and brightness processing module, which includes a light sensor and threshold setting module to adjust the brightness of color light beams, ensuring uniform brightness across all projectors, thereby maintaining image integrity and extending projector lifespan.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If multiple projectors are combined to form large size projecting images, then the image size and resolution are improved, but color and brightness irregularity occurs due to different characteristics between projectors
Solution Approach 1:
The patent implements a feedback mechanism where a light sensor detects the brightness of the color light beam, and the brightness processing module adjusts the brightness value based on the detected value to ensure uniform brightness across multiple projectors. This closed-loop feedback system compensates for differences in projector characteristics.
Solution Approach 2:
The patent changes the brightness parameter of the color light beam dynamically by adjusting the brightness value according to the detected brightness level. This parameter adjustment ensures that all projectors output consistent brightness levels despite having different initial characteristics.
2Area of stationary object
If multiple projectors are combined to form large size projecting images, then the image size and resolution are improved, but the images appear segmented with obvious chinks
Solution Approach 1:
The light sensor continuously monitors the brightness output, and the brightness processing module makes real-time adjustments to ensure consistent brightness across all projectors. This feedback control eliminates visible boundaries and maintains image integrity.
Solution Approach 2:
The patent applies homogeneity by making all projectors output the same brightness level through the brightness adjustment mechanism. This ensures uniform visual appearance across the entire projected image, eliminating segmented effects.
3Illumination intensity
If the brightness value of the color light beam is adjusted to match default threshold values, then brightness uniformity is improved, but additional control complexity is introduced
Solution Approach 1:
The patent uses a feedback control system where the light sensor detects brightness and the brightness processing module automatically adjusts the brightness value to match the default threshold. This automated feedback mechanism achieves uniformity without requiring complex manual control.
Solution Approach 2:
The brightness adjustment system is self-regulating, automatically detecting and correcting brightness variations without external intervention. The system serves itself by using the detected brightness information to make necessary adjustments, reducing the need for complex external control.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The system ensures consistent brightness and color across projected images, eliminating segmentation and extending projector lifespan by dynamically adjusting light output to match default threshold values, thus enhancing viewer experience and projector longevity.
Implementation Method 1
a light sensor and the light sensor is disposed on a transmission path of a portion of the color light beam for sensing a brightness value of the portion of the color light beam
Implementation Method 2
The color wheel module is used for being excited by the light beam emitted from the light source module to generate at least one color light beam, in which a wavelength of the color light beam is different from a wavelength of the light beam
Data Source
AI summary
The invention provides a projector and a brightness adjusting method thereof. The projector includes a light source module, a color wheel module, a brightness adjusting device, and a brightness processing module. The light source module is used for emitting a light beam. The color wheel module is used for being excited to generate at least one color light beam by the light beam emitted from the light source module. The brightness adjusting device includes a light sensor and a brightness processing module, wherein the light sensor is disposed on a transmission path of a portion of the color light beam and the brightness processing module is electrically connected to the light sensor for adjusting the brightness value of the color light beam. The brightness adjusting method of projector is also provided.