Display Light Source Insulation Sheet for Vertical Heat Blocking
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Solution Overview
Problem
The increasing heat generation in slim and miniaturized electronic devices, particularly in display devices with high-performance backlight units, leads to discomfort and risk of burns due to inadequate heat dissipation, as heat is transferred to the device housing and surrounding areas.
Innovation Solution
An insulation sheet with a graphite sheet and adhesive member is applied opposite to the circuit board mounting surface of LED elements, minimizing heat transfer in the perpendicular direction by moving heat in the plane direction and accumulating it in the thickness direction, thereby reducing the heating level of LED elements and preventing heat transfer to the housing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the number of LED elements is increased to improve luminance and contrast ratio, then display performance is improved, but heat generation increases causing user discomfort and potential burns
Solution Approach 1:
The patent divides the heat management function into separate components: the graphite sheet for heat dissipation and the foam insulation sheet for heat blocking. This segmentation allows each component to specialize in one aspect of thermal management, enabling effective heat control while maintaining high LED density for improved luminance
Solution Approach 2:
The patent introduces an intermediary insulation structure between the LED array and the housing. The foam insulation sheet acts as a thermal barrier that intercepts heat before it reaches the housing, preventing heat transfer while allowing the LED array to maintain high density for improved display performance
2Length of moving object
If the device is made slimmer to improve portability, then device thickness is reduced, but heat dissipation space is limited causing heat to transfer to the housing
Solution Approach 1:
The patent addresses the limited thickness direction by utilizing the plane direction for heat dissipation. The graphite sheet spreads heat in the plane direction away from LED locations, while the foam insulation sheet blocks heat in the thickness direction toward the housing. This dimensional approach allows effective heat management in slim devices
Solution Approach 2:
The patent employs a composite thermal management structure combining graphite sheet and foam insulation sheet with different thermal properties. The graphite sheet provides high in-plane thermal conductivity for heat spreading, while the foam insulation sheet provides low through-thickness thermal conductivity for heat blocking, enabling effective heat control in slim devices
3Temperature
If heat insulation material is added to block heat transfer, then heat blocking performance is improved, but device complexity and structure become more complex
Solution Approach 1:
The patent designs the foam insulation sheet to serve multiple functions: it acts as a thermal barrier to block heat transfer to the housing, provides structural support for the backlight unit, and fills void spaces in the device assembly. This multi-functionality reduces the need for additional separate components, maintaining simplicity while improving heat blocking performance
Solution Approach 2:
The patent uses thin foam insulation sheets that can be easily integrated into the existing device structure. The flexible nature of the foam material allows it to conform to the housing contours and fit into available spaces without requiring complex modifications to the device architecture, thus improving heat blocking while maintaining structural simplicity
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 insulation sheet effectively minimizes vertical heat transfer and reduces the heating level of LED elements, preventing heat-related discomfort and damage, while also preventing dust scattering that could cause malfunction, making it suitable for various display devices.
Implementation Method 1
the insulation member has a function of minimizing heat transfer from the second surface toward a direction perpendicular thereto by moving the heat transferred toward the first surface adjacent to the adhesive member in a thickness direction and in a plane direction perpendicular to the thickness direction
Implementation Method 2
block heat generated from the plurality of LED elements from being transmitted in a direction perpendicular to the opposite surface
Data Source
AI summary
An insulation sheet for a display light source is provided. An insulation sheet for a display light source according to an embodiment of the present invention is provided on an opposite surface opposite to a circuit board mounting surface on which multiple LED elements configuring a light source of a display are mounted while being spaced a predetermined interval apart from each other, so as to block heat generated from the multiple LED elements from being transmitted in a direction perpendicular to the opposite surface. Accordingly, the insulation sheet can minimize vertical transfer of received heat as well as reducing the heating level of the multiple LED elements, and is thus advantageous in minimizing or preventing heat transfer in an undesirable direction and/or of an undesirable amount.