Backlight Assembly Recessed Substrate for Slim Display
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Solution Overview
Problem
The thickness of optical members in backlight assemblies for LCDs, which are necessary for uniform light diffusion, increases the overall thickness and weight of display devices, making it difficult to achieve a slim and lightweight design.
Innovation Solution
A backlight assembly with a circuit substrate featuring recessed portions to house point light sources, allowing for a thinner optical member and reduced overall thickness, while maintaining efficient light diffusion and uniform luminance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the optical member is made thicker to achieve uniform light diffusion, then the light diffusion performance is improved, but the overall thickness and weight of the backlight assembly increase
Solution Approach 1:
The patent introduces recessed portions in the circuit substrate that extend in the thickness direction (vertical dimension) to accommodate the light sources. This allows the optical member to be thinner in the horizontal plane while maintaining sufficient light diffusion path length through the vertical recesses, effectively solving the contradiction between thickness and diffusion performance.
Solution Approach 2:
The light sources are nested within recessed portions of the circuit substrate, which are themselves nested within the overall backlight assembly structure. This nested arrangement allows compact integration of components, reducing the overall thickness while maintaining the optical path length needed for uniform light diffusion.
2Reliability
If the optical member is made thicker to achieve uniform light diffusion, then the light diffusion performance is improved, but the weight of the backlight assembly increases
Solution Approach 1:
By utilizing the thickness direction through recessed portions, the patent achieves uniform light diffusion without increasing the horizontal footprint or overall volume of the optical member, thereby avoiding weight increase while maintaining diffusion performance.
Solution Approach 2:
The optical member is designed as a thin film structure that achieves effective light diffusion through carefully engineered recessed portions and light guiding structures, eliminating the need for thick bulky materials and reducing overall weight.
3Illumination intensity
If the size of the display device is increased to accommodate more light emitting diodes, then the luminance and image quality are improved, but the manufacturing cost increases
Solution Approach 1:
The patent merges the light source mounting function directly into the circuit substrate through integrated recessed portions, eliminating the need for separate mounting structures. This integration allows higher density of light emitting diodes within the same footprint, improving luminance without proportionally increasing manufacturing complexity or cost.
Solution Approach 2:
The circuit substrate serves multiple functions: it provides electrical connections, structural support, and light source mounting through its recessed portions. This multi-functionality reduces the need for additional components, thereby controlling manufacturing cost while enabling higher luminance through increased light source density.
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 the manufacturing cost and volume of the backlight assembly, enabling the creation of slimmer and lighter display devices with improved optical efficiency.
Implementation Method 1
an optical member covering the point light sources to guide light emitted from the point light sources
Implementation Method 2
which guides and more uniformly diffuses the light emitted from the light emitting diodes
Data Source
AI summary
A backlight assembly and a display device having the same are provided. The backlight assembly includes a first substrate, point light sources disposed upon the first substrate and an optical member covering the point light sources to guide light emitted from the point light sources, wherein the first substrate has recessed portions, and the point light sources are positioned within the recessed portions.