Dual Light Source Blinking for Wide-Gamut Display Color Mixing
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current displays struggle to achieve higher-definition images with an expanded color gamut, as existing light emitting devices are limited in their ability to produce a wide range of colors.
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 their operation to produce mixed colors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a conventional light source combining blue LED, green phosphor, and red phosphor is used, then the display can achieve basic color coverage, but the color gamut is limited and cannot meet higher-definition display requirements
Solution Approach 1:
The patent divides the conventional single light source into two separate light sources: a first light source emitting blue and red light, and a second light source emitting green and red light. This segmentation allows independent optimization of each light source's spectral characteristics, enabling broader color gamut coverage while maintaining manufacturing precision for high-definition displays
Solution Approach 2:
The patent employs time-division multiplexing where the first and second light sources are alternately activated in periodic cycles. During each frame period, the light sources blink alternately to generate different color components that are combined by the display panel, achieving expanded color gamut without requiring all wavelengths to be present simultaneously in a single light source
2Adaptability or versatility
If multiple phosphors are combined in a single light source, then color coverage is improved, but the complexity of the light source structure increases and manufacturing becomes more difficult
Solution Approach 1:
Instead of combining multiple phosphors in a single light source, the patent segments the phosphor combinations into two separate light sources. Each light source contains a simplified phosphor configuration (first light source: blue LED + red phosphor; second light source: green phosphor + red phosphor), reducing the complexity of each individual light source while collectively achieving broader color coverage through alternating operation
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
This configuration enables the display to emit color light over a wider color gamut, effectively displaying images with a broader range of colors, enhancing display quality.
Implementation Method 1
a first blue light emitting element and a first phosphor layer, the first blue light emitting element emitting the first blue light
Implementation Method 2
a first phosphor layer including a first red phosphor that is excited by the first blue light to emit the first red light
Implementation Method 3
a second green light emitting element and a second phosphor layer, the second green light emitting element emitting the second green light
Implementation Method 4
a second phosphor layer including a second red phosphor that is excited by the second green light to emit the second red light
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.