Display Light Source Blinking Scheme for Wider Color Gamut
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Solution Overview
Problem
Current displays struggle to achieve higher-definition images with a wider color gamut, as existing light emitting devices are limited in their ability to produce a broad range of colors effectively.
Innovation Solution
A light emitting device comprising a first light source that emits alternating blue and red light, and a second light source that emits green and red light independently, allowing for a wider color gamut by alternating the operation of these sources to create a mixed color output.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a single light source with blue LED and phosphor is used, then the device structure is simple, but the color gamut is limited
Solution Approach 1:
The patent divides the light source into two separate light sources: a first light source emitting blue light and a second light source emitting green light. Each light source has its own LED chip and phosphor layer, allowing independent control and optimization of color emission. This segmentation enables broader color gamut coverage while maintaining manageable structural complexity through modular design.
Solution Approach 2:
The patent makes each light source capable of multiple functions: the first light source emits both blue light directly and excites red phosphor, while the second light source emits green light directly and excites red phosphor. This multi-functionality allows the system to cover a wider color gamut using two light sources instead of requiring three separate monochromatic sources.
2Ease of manufacture
If blue light and red phosphor are combined in one light source, then manufacturing is simple, but color purity and gamut expansion are limited
Solution Approach 1:
The patent separates the color emission functions into two distinct light source modules, each with its own LED chip and phosphor combination. This segmentation allows each module to be optimized for specific color ranges (blue-cyan and green-red), improving color gamut accuracy while maintaining ease of manufacture through standardized modular assembly processes.
Solution Approach 2:
The patent changes the operational parameters of the light sources by controlling their respective drive currents independently. By adjusting the intensity ratios of the first and second light sources, the system can precisely control the overall color output and gamut coverage, achieving high manufacturing precision in color reproduction.
3Adaptability or versatility
If one light source emits all colors simultaneously, then the structure is simple, but color purity and gamut width are compromised
Solution Approach 1:
The patent employs time-division multiplexing where the first and second light sources are driven alternately or in controlled sequences rather than simultaneously at full intensity. This periodic action allows each light source to emit its optimized color range with high purity, and the human eye integrates these sequential emissions into a perceived broad color gamut, achieving wide gamut without requiring all colors to be emitted simultaneously by a single source.
Solution Approach 2:
The patent dynamically controls the intensity and timing of each light source based on the desired color output. By adjusting the drive currents and duty cycles of the first and second light sources independently, the system can adaptively optimize color gamut coverage for different display requirements, achieving high adaptability while managing device complexity through intelligent 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 solution enables the display of images with a wider color gamut by alternately turning on the first and second light sources, effectively covering a broader chromaticity range and enhancing color purity and illumination quality.
Implementation Method 1
a blue light emitting diode
Implementation Method 2
a red phosphor
Implementation Method 3
a green light emitting diode
Implementation Method 4
a red phosphor
Data Source
AI summary
To provide a light emitting device that is used for a display that is able to display an image having a wider color gamut. This light emitting device includes: a first light source configured to perform an operation of blinking first emission light including first blue light and first red light; and a second light source configured to perform an operation of blinking second emission light independently of the operation of blinking the first emission light by the first light source. The second emission light includes second red light and green light.