Backlight Unit Bending Section Heat Dissipation
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Solution Overview
Problem
High brightness light sources in display devices, such as LEDs, generate excessive heat, leading to increased temperatures that can cause deformation of adjacent optical components and reduce the service life of light sources if not dissipated effectively.
Innovation Solution
A backlight unit design featuring a backplane with a bending section and mounting portion that includes a zigzag structure for improved heat dissipation, where light sources are mounted on the mounting portion, enhancing thermal conductivity and contact area for efficient heat dissipation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the brightness of light sources is increased to improve display brightness, then the display brightness is improved, but the heat output of the light sources increases
Solution Approach 1:
The patent extracts the heat dissipation function from the conventional flat backplane structure by introducing a bending section that protrudes toward the light sources. This bending section is specifically designed to create a dedicated heat dissipation pathway that separates the light source mounting area from the conventional flat surface, allowing heat to be conducted away more effectively while maintaining the required brightness levels.
Solution Approach 2:
The bending section acts as an intermediary thermal conduction path between the light sources and the heat dissipation structure. By positioning this bending section between the light sources and the main backplane body, it serves as a thermal mediator that conducts heat away from the light sources through its extended structure, reducing the temperature at the light source mounting location while allowing the light sources to operate at high brightness levels.
2Illumination intensity
If the number of light sources is increased to improve display brightness, then the display brightness is improved, but the accumulated heat energy increases
Solution Approach 1:
The backplane is segmented into a flat body section and a bending section with distinct functions. The bending section is specifically segmented to include multiple mounting portions that can accommodate multiple light sources. Each mounting portion is equipped with zigzag structures that increase the surface area for heat dissipation, allowing the system to handle multiple light sources without excessive heat accumulation.
Solution Approach 2:
The patent transitions from a conventional two-dimensional flat backplane to a three-dimensional structure by adding a bending section that protrudes toward the light sources. This dimensional change creates additional surface area and thermal pathways in the vertical dimension, enabling more effective heat dissipation from multiple light sources arranged on the bending section's mounting portions.
3Device complexity
If a flat backplane structure is used, then the structure is simple, but the heat dissipation efficiency is insufficient
Solution Approach 1:
The patent introduces a curved or bent geometry to the backplane by adding a bending section that protrudes toward the light sources. This curved structure increases the surface area available for heat dissipation and creates better thermal contact with the light sources compared to a flat structure. The bending section's curved geometry allows it to wrap around or approach the light sources more closely, improving thermal coupling while maintaining manufacturing feasibility.
4Temperature
If the mounting portion is positioned close to the light sources, then the heat dissipation contact area is improved, but the structural stability may be affected
Solution Approach 1:
The backplane structure is designed with asymmetry by introducing a bending section that selectively protrudes in a specific direction toward the light sources, rather than uniformly across the entire backplane. This asymmetric design allows the bending section to be positioned strategically close to the light sources for improved heat dissipation, while the rest of the backplane maintains its conventional stable structure. The asymmetric configuration optimizes thermal management without compromising overall structural integrity.
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 design improves the radiating efficiency of light sources, prolongs their service life, and protects adjacent optical components from heat-induced deformation, ensuring better structural stability and display performance.
Implementation Method 1
the backplane includes a body section and a bending section connected with the body section... light sources are disposed on the mounting portion... improves the radiating efficiency of light sources
Data Source
AI summary
A backlight unit includes a backplane and a light guide plate. The backplane includes a body section and a bending section connected with the body section; the body section includes a first surface and a second surface opposite to each other; the bending section includes at least a connecting portion and a mounting portion extended from the connecting portion and opposite to the first surface; the connecting portion is a bending structure along a first side of the body section; a bending direction of the connecting portion is a direction from the second surface of the body section to the first surface; the light guide plate is disposed on the first surface of the body section; one side of the mounting portion away from the connecting portion is opposite to a first end face of the light guide plate; and light sources are disposed on the mounting portion. A display device is further disclosed.