Phosphor-Converted LED Package for Selectable Display Color Spaces
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional light-emitting device packages are limited in expressing various color spaces due to their inability to emit light with multiple visible light wavelength spectra, restricting them to expressing only one color space.
Innovation Solution
A light-emitting device package is designed with a lead frame mounting multiple light-emitting devices configured to emit different wavelengths of the same color light, along with phosphors that emit light of a different color, allowing for the expression of multiple color spaces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a conventional light-emitting device package uses a single phosphor material, then the device structure remains simple, but the device can only express one color space with a single visible light wavelength spectrum
Solution Approach 1:
The patent combines multiple light-emitting devices (first light-emitting device emitting blue light, second light-emitting device emitting green light) within a single package along with multiple phosphor materials (yellow phosphor, red phosphor) to create a unified structure that can express multiple color spaces (Rec. 709 and DCI-P3), thereby achieving versatility without proportionally increasing device complexity
Solution Approach 2:
The light-emitting device package is designed with multi-functional capability to express different color spaces by selectively activating different combinations of light-emitting devices and phosphors. The same physical package can switch between Rec. 709 color space (using blue LED + yellow phosphor) and DCI-P3 color space (using blue LED + green LED + yellow phosphor + red phosphor), making it universally applicable for various display requirements
2Adaptability or versatility
If multiple light-emitting devices and phosphors are integrated in one package to express various color spaces, then color expression capability improves, but device complexity increases
Solution Approach 1:
The patent segments the light-emitting device package into distinct functional modules: a first light-emitting device (blue LED), a second light-emitting device (green LED), a yellow phosphor layer, and a red phosphor layer. Each component has a specific function, and they can be selectively activated to produce different color spaces, making the complex system manageable and controllable
Solution Approach 2:
The patent adds a temporal dimension to color space expression by enabling dynamic switching between different color spaces through selective activation of light-emitting devices and phosphors over time. This allows the same physical structure to provide multiple color space options (Rec. 709, DCI-P3, or intermediate color spaces) based on display content requirements, effectively resolving the complexity issue 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
This configuration enables the light-emitting device package to express various color spaces, adapt to user demands or display situations, and improve the characteristics of white light sources, thereby enhancing color expression and image quality.
Implementation Method 1
a light-emitting device package including a light-emitting device such as a Light-Emitting Diode (LED)
Implementation Method 2
at least one type of phosphor... the phosphor used in such a conventional light-emitting device package has a light emission spectrum characteristic
Data Source
AI summary
Embodiments of the present disclosure relate to a light-emitting device package and an electronic device. In an embodiment, a light-emitting device package is provided that includes a lead frame, at least two light-emitting devices mounted on the lead frame and configured to emit different wavelengths of a same color of light, and a phosphor configured to emit light having a color different from the color of light emitted from the at least two light-emitting devices. The embodiments of the present disclosure also relate to an electronic device including the light-emitting device package as a light source. According to the embodiments of the present disclosure, various expressible color spaces can be selectively expressed.