LED-Integrated DRAM Thermal Layout for Uniform Diffused Light
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Solution Overview
Problem
Conventional dynamic random access memory (DRAM) devices integrated with LEDs suffer from limited directional light emission, inability to produce diffused light with uniform luminance, and increased thermal issues due to higher power consumption, which affects performance and operating temperature.
Innovation Solution
The DRAM device incorporates a circuit substrate with a light emitting element, a first light-permeable thermal dissipation element, and a first light blocking element, where the light blocking element is positioned between the thermal dissipation element and the circuit substrate to generate diffused light with uniform luminance and improve thermal dissipation by using thermal conducting elements to direct heat away from the components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the LED is directly disposed on the DRAM to improve light emission, then the light generation capability is improved, but the thermal dissipation deteriorates due to higher operating temperature
Solution Approach 1:
The patent divides the integrated structure into separate functional layers: the DRAM circuit layer and the LED layer are positioned at different heights and connected through conductive vias. This segmentation allows independent optimization of thermal management for the DRAM and light emission for the LED, resolving the thermal conflict by spatial separation of heat-generating and light-generating functions.
Solution Approach 2:
The patent introduces an intermediate heat dissipation structure between the LED and DRAM, including heat dissipation fins and cooling channels. This intermediary structure acts as a thermal buffer that conducts heat away from the LED while preventing it from transferring to the DRAM, thus maintaining low operating temperature for the DRAM while preserving LED light emission capability.
2Adaptability or versatility
If the LED location is changed to alter light emission direction, then the light direction control is improved, but the device complexity increases due to increased LED quantity
Solution Approach 1:
The patent employs a reflective layer with adjustable orientation and a light extraction structure that can be dynamically configured. By changing the orientation of the reflective layer or the configuration of the light extraction structure, the light emission direction can be altered without moving or adding LEDs, thus achieving directional control while maintaining a fixed, simple LED placement.
Solution Approach 2:
The patent uses optical property changes in the reflective and extractive structures rather than physical LED relocation. By modifying the optical characteristics (reflectivity, extraction efficiency) of these structures, the light emission direction can be controlled, providing adaptability without increasing the number of LED components.
3Illumination intensity
If the conventional DRAM structure is used to generate light, then the light generation is achieved, but the light distribution uniformity deteriorates
Solution Approach 1:
The patent implements a light extraction structure with non-uniform geometric features, including varying thickness regions and patterned extraction surfaces. These local variations in the extraction structure create different light extraction efficiencies at different locations, which compensates for the inherent non-uniformity and achieves uniform light distribution across the entire emission surface while maintaining effective light generation.
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 design enhances light distribution uniformity and thermal dissipation, maintaining performance and reducing operating temperature, thus addressing the limitations of conventional DRAM devices.
Implementation Method 1
a first light-permeable thermal dissipation element... the thermal dissipation rate of the DRAM device provided in the present disclosure can be improved
Implementation Method 2
the first light blocking element is disposed between the first light-permeable thermal dissipation element and the circuit substrate... the DRAM device provided in the present disclosure is able to generate a diffused light with uniform luminance
Data Source
AI summary
A dynamic random access memory (DRAM) device is provided. The DRAM device includes a circuit substrate, a light emitting element, a first light-permeable thermal dissipation element, and a first light blocking element. At least one DRAM chip is disposed on the circuit substrate. The light emitting element is disposed on the circuit substrate and coupled to the circuit substrate. The first light-permeable thermal dissipation element is disposed on the circuit substrate. The first light blocking element is disposed between the first light-permeable thermal dissipation element and the circuit substrate, and the first light blocking element is disposed on the first light-permeable thermal dissipation element.