Dynamic Laser Phosphor Light Modulation for Display Color Gamut
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Solution Overview
Problem
Display devices with wide color gamut light sources face high costs and inefficiencies due to the high expense and low efficiency of red and green laser lights, leading to increased power and heat dissipation requirements.
Innovation Solution
A display device and method that dynamically adjust the amount of first light (fluorescence) and second light (red and green laser light) based on image data to achieve a wide color gamut while minimizing the use of the second light, reducing power and heat dissipation needs, and thus costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If red and green laser light sources are used to achieve wide color gamut, then color gamut range is improved, but device cost and energy consumption increase
Solution Approach 1:
The patent implements dynamic adjustment of laser light usage by controlling the amount of red and green laser light based on temperature conditions. When temperature is within the normal range, full laser light is used to achieve wide color gamut. When temperature exceeds the threshold, the system automatically reduces laser light usage to prevent overheating, thus dynamically optimizing both color gamut performance and energy consumption.
Solution Approach 2:
The system changes the operating parameters of the red laser light source by adjusting its output intensity based on temperature feedback. The control unit modifies the laser light amount parameter dynamically, reducing it when temperature rises above the preset threshold, thereby adapting the energy consumption to match thermal conditions while maintaining acceptable color gamut coverage.
2Adaptability or versatility
If red and green laser light sources are used to achieve wide color gamut, then color gamut range is improved, but device cost increases
Solution Approach 1:
The patent adopts a cost-optimized approach by using blue laser light combined with phosphor conversion instead of expensive red and green laser sources. The blue laser excites phosphor materials to generate red and green light components, significantly reducing device cost while maintaining acceptable color gamut performance for standard applications.
Solution Approach 2:
The system uses composite light generation by combining blue laser light with phosphor materials that convert the blue light into red and green wavelengths. This composite approach creates a cost-effective light source that achieves wide color gamut coverage without requiring three separate expensive laser sources, thereby reducing manufacturing costs while maintaining color performance.
3Ease of manufacture
If blue laser light excites phosphor to generate red and green light, then device cost is reduced, but color gamut range becomes narrow
Solution Approach 1:
The system dynamically adjusts the amount of blue laser light used to excite the phosphor based on temperature conditions. By controlling the laser light amount, the system optimizes the balance between cost-effective phosphor-based light generation and maintaining adequate color gamut coverage, ensuring that the cheaper light source performs as effectively as possible within thermal constraints.
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 display device to maintain high color gamut performance while reducing the use of expensive wide color gamut light sources, lowering the overall cost and energy consumption of the device.
Implementation Method 1
a general blue laser light source is taken as an excitation light source with a short wavelength to excite the phosphors to produce red and green primary lights
Implementation Method 2
another of which directly utilizes three colors including red, green, and blue of laser light as light sources for three primary colors
Data Source
AI summary
The display device comprises a light source device, an image pre-processing controller, and a light modulation device. The light source device emits first light and second light, wherein a color gamut range of the second light is wider than that of the first light. The image pre-processing controller acquires a color gamut range of the image to be displayed and a brightness value of each pixel based on original image data of an image data to be displayed, and determines a current color gamut range and controls the light source device to emit first light and the second light corresponding to amount of light required in the current color gamut range. The light modulation device modulates the light emitted by the light source device to generate image light of the image to be displayed based on image data corresponding to the current color gamut range.