LED Backlight Reflection Plate with Through Holes
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Solution Overview
Problem
Conventional liquid crystal displays using light emission diodes as a light source have a high number of parts, increasing manufacturing costs and requiring additional components for heat management and light reflection, which complicates the assembly process.
Innovation Solution
A liquid crystal display design that integrates a printed circuit board with light emission diodes on a rear surface of a reflection plate made of light reflective resin, reducing the number of parts by unifying separate components into a single reflective surface, and incorporating through holes and support structures to manage heat and light reflection efficiently.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate reflective members and thermally conductive parts are added to prevent light leakage and manage heat, then light reflection efficiency and heat dissipation are improved, but the number of parts increases leading to higher manufacturing costs
Solution Approach 1:
The patent combines the reflective member and thermally conductive part into a single integrated reflection plate. This reflection plate has a front surface with high reflectivity coating for light reflection and a rear surface with thermal conduction structures for heat dissipation. By merging these two separate components into one, the patent reduces the total number of parts while maintaining both light reflection efficiency and heat dissipation performance.
Solution Approach 2:
The reflection plate serves multiple functions simultaneously: it reflects light from the LED to the liquid crystal panel, dissipates heat generated by the LED through thermal conduction structures, and acts as a structural support component. This multi-functional design eliminates the need for separate dedicated components for each function, thereby reducing device complexity and manufacturing costs.
2Reliability
If multiple separate components are used for light reflection and heat management, then functional performance is optimized, but assembly process becomes more complex and time-consuming
Solution Approach 1:
By integrating heat dissipation structures directly into the reflection plate, the patent reduces the number of assembly steps. Instead of assembling separate reflective members and thermally conductive parts, the integrated reflection plate is installed as a single component, significantly improving assembly process efficiency and productivity.
3Illumination intensity
If additional reflective sheets are attached to the printed circuit board, then light reflectivity is increased, but manufacturing costs and assembly complexity increase
Solution Approach 1:
The reflective function is integrated into the reflection plate itself through high reflectivity coating on the front surface. This eliminates the need for separate reflective sheets to be attached to the printed circuit board, as the reflection plate serves as both the reflective surface and the heat dissipation structure. The manufacturing cost is reduced by eliminating additional materials and assembly steps.
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 reduces manufacturing costs, simplifies the assembly process, and effectively manages heat dissipation without additional cooling units, while maintaining high reflectivity and structural integrity.
Implementation Method 1
a reflection plate to reflect light emitted from the light emission diodes toward the liquid crystal panel
Implementation Method 2
light emission diodes to emit light to be illuminated on the liquid crystal panel
Data Source
AI summary
A liquid crystal display, wherein a printed circuit board equipped with light emission diodes serving as a light source is disposed on the rear surface of a reflection plate, to reduce manufacturing costs of the product by reducing a number of parts forming a back light unit and to easily emit heat, includes a liquid crystal panel, light emission diodes to emit light to be illuminated on the liquid crystal panel, a printed circuit board equipped with the light emission diodes, and a reflection plate to reflect light emitted from the light emission diodes toward the liquid crystal panel and includes through holes to pass the light emission diodes therethrough, wherein the printed circuit board is coupled to a rear surface of the reflection plate.