LED Packaging Structure with Segmented Cups for Efficiency
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Solution Overview
Problem
Conventional LED packaging in TFT-LCD devices, where blue and green light emitting chips with red phosphor are packaged together, results in low energy efficiency due to the red phosphor absorbing green light, leading to significant energy loss and reduced luminous flux.
Innovation Solution
Separate packaging of blue and green light emitting chips, with the blue chip cup filled with red emitting phosphor mixed with silicone and the green chip cup filled with silicone and scattering particles, preventing energy loss and enhancing lighting efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If blue and green light emitting chips with red phosphor are packaged in the same cup, then the device can be manufactured with simpler structure, but the red phosphor absorbs green light causing energy loss and reduced luminous flux
Solution Approach 1:
The patent divides the packaging structure into separate cups for blue and green light emitting chips. The blue chip is placed in a first cup filled with red phosphor mixed with silicone, while the green chip is placed in a second cup filled with silicone and scattering particles. This segmentation prevents the red phosphor from absorbing green light, thereby reducing energy loss while maintaining manufacturing simplicity through the modular cup design.
2Productivity
If blue and green light emitting chips are packaged separately in different cups, then energy efficiency and luminous flux are improved, but the packaging structure becomes more complex
Solution Approach 1:
The patent employs a nested structure where the first cup (containing blue chip and red phosphor) and the second cup (containing green chip and scattering particles) are both carried by a single holder. This nesting approach allows separate packaging of blue and green chips to prevent energy loss, while the common holder integrates the overall structure, thereby reducing the complexity increase that would result from completely separate packaging systems.
3Illumination intensity
If red phosphor is mixed with silicone in the blue chip cup, then red light emission is achieved, but green light energy is absorbed causing performance degradation
Solution Approach 1:
The patent segments the phosphor distribution by placing red phosphor mixed with silicone only in the first cup containing the blue light emitting chip, while the second cup containing the green chip is filled with silicone and scattering particles but no red phosphor. This segmentation ensures red light emission from the blue chip while preventing green light absorption, thereby maintaining energy efficiency.
4Illumination intensity
If scattering particles are added to the green chip cup, then green light distribution is improved, but the structure becomes more complex
Solution Approach 1:
The patent applies local quality by adding scattering particles specifically to the second cup containing the green light emitting chip, while the first cup contains only red phosphor mixed with silicone. This localized addition of scattering particles improves green light distribution where needed without unnecessarily complicating the overall packaging structure, as each cup has a tailored composition optimized for its specific function.
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 increases the lighting efficiency of LEDs by preventing energy loss and allowing independent driving of blue and green light emitting chips, improving color gamut and performance in LCD devices.
Implementation Method 1
a blue light emitting chip is placed in the first cup, which is filled with a red emitting phosphor mixed with silicone
Implementation Method 2
the second cup is further filled with scattering particles
Data Source
AI summary
A light emitting diode packaging structure is disclosed, which has a first cup, a second cup, and a holder carried the first cup and the second cup; a blue light emitting chip is placed in the first cup, which is filled with a red emitting phosphor mixed with silicone, and a green light emitting chip is placed in the second cup, which is filled with a silicone, such that the energy consumption of G light caused by the red emitting phosphor absorbing G light in the conventional art can therefore be solved, and the lighting efficiency of the LED is increased.