Light Source Module Adjusting Blue Beam Color Gamut
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Solution Overview
Problem
Current projection apparatuses using blue laser light sources often fail to achieve a color gamut compliant with standards like Rec.709 and DCI-P3, resulting in images appearing blue-purple instead of standard blue due to limitations in the blue beam's coordinate point in the CIE 1931 color space.
Innovation Solution
A light source module comprising a blue laser light source, an adjusting light source, a wavelength conversion device with transmissive and conversion areas, and a light combiner, which combines the blue and adjusting beams to adjust the blue beam's chroma and brightness, allowing it to meet wider color gamut specifications.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a blue laser light source is used in projection apparatus, then the brightness and laser directivity are improved, but the color gamut compliance deteriorates because the blue beam coordinate point deviates from standard specifications
Solution Approach 1:
The patent segments the blue beam adjustment into two independent components: a blue laser light source for brightness and an adjusting light source for color correction. The adjusting light source is divided into multiple emitting units with different wavelengths that can be independently controlled to precisely adjust the blue beam coordinate point without affecting overall brightness.
Solution Approach 2:
The patent introduces an adjusting light source as an intermediary element between the blue laser light source and the projection system. This adjusting light source acts as a mediator to correct the color gamut by adding specific wavelengths that shift the blue beam coordinate point to comply with standards, while the light combining unit merges both light sources into a unified output.
2Manufacturing precision
If the blue beam coordinate point is adjusted to meet standard color gamut specifications, then the color accuracy is improved, but the brightness may deteriorate
Solution Approach 1:
The patent merges the blue laser light source and the adjusting light source into a combined light output through a light combining unit. This merging allows the system to simultaneously utilize the high brightness of the blue laser and the color correction capability of the adjusting light source, achieving both brightness and color accuracy requirements.
Solution Approach 2:
The patent changes the optical parameters by introducing multiple wavelengths from the adjusting light source to modify the blue beam coordinate point in the CIE 1931 color space. By adjusting the intensity ratios of different wavelength components, the system achieves precise coordinate point control while maintaining overall luminance through parameter optimization.
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 solution enables the projection apparatus to produce a blue image that complies with Rec.709 and DCI-P3 standards, enhancing color accuracy and brightness by optically adjusting the blue beam to satisfy different optical applications.
Implementation Method 1
a blue laser light excites the fluorescent powder adapted to convert the laser light into a green beam or a yellow beam on a fluorescence color wheel
Implementation Method 2
the light combiner is adapted to combine the blue beam and the adjusting beam into a second blue beam
Data Source
AI summary
A light source module including a blue laser light source, an adjusting light source, a wavelength conversion device, and a light combiner is provided. The wavelength conversion device is disposed on an optical path of a first blue beam provided by the blue laser light source and an optical path of an adjusting beam provided by the adjusting light source. When a first transmissive area of the wavelength conversion device is cut into the optical path of the first blue beam, the blue laser light source and the adjusting light source are simultaneously turned on. A transmission direction of the first blue beam passing through the first transmissive area is opposite to a transmission direction of the adjusting beam passing through the first transmissive area. The light combiner combines the first blue beam and the adjusting beam into a second blue beam. Moreover, a projection apparatus is provided. The light source module and the projection apparatus in the invention may adjust a blue beam complied with a wider color gamut specification, and is easy to achieve an image with wider color gamut.