Backlight Unit Light Guide Panel Uniformity and Assembly
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Solution Overview
Problem
Conventional light emitting diode (LED) backlight units for displays suffer from hot spots, inefficiencies in light distribution, and complexity in assembly, which affect image quality and durability.
Innovation Solution
The implementation of an optical assembly comprising a light guide panel with a light incident part and a light emitting part, along with a reflecting member and side covers, arranged in a matrix to distribute light uniformly and reduce power consumption, while allowing for independent driving of each division area for improved contrast and ease of assembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If conventional LED backlight units are used, then light emission is achieved, but hot spots occur and light distribution is inefficient
Solution Approach 1:
The backlight unit is divided into multiple division areas, each with its own optical assembly containing light sources and light guide panels. This segmentation allows independent control and optimization of light distribution in each area, preventing hot spots and improving overall uniformity.
Solution Approach 2:
Light guide panels are introduced as intermediary components between the light sources and the display panel. These panels redirect and distribute light uniformly across the display area, eliminating hot spots and improving illumination uniformity.
2Ease of manufacture
If conventional LED backlight units are used, then light emission is achieved, but assembly complexity increases
Solution Approach 1:
The backlight unit is segmented into modular optical assemblies that can be independently manufactured and assembled. Each assembly contains light sources, light guide panels, and reflective members, allowing for simplified assembly processes and easier replacement of individual components.
3Use of energy by stationary object
If conventional LED backlight units are used, then light emission is achieved, but power consumption is high
Solution Approach 1:
The backlight unit is divided into multiple independently controllable division areas. This allows selective activation of only the necessary areas, reducing overall power consumption while maintaining energy efficiency in the active regions.
Solution Approach 2:
The light guide panels continuously redirect and distribute light from the light sources to the display panel, ensuring efficient energy utilization and preventing energy loss through improper light distribution.
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 configuration enhances image quality by reducing hot spots, improving light uniformity, and simplifying the assembly process, leading to increased durability and cost-effectiveness, with the ability to adapt to various display sizes and easy replacement of damaged components.
Implementation Method 1
a light guide panel having a light incident section to receive light from a first direction and a light emitting section adjacent to the light incident section to emit light received from the light incident section in a second direction
Implementation Method 2
a reflecting member to reflect light from the light guide panel
Data Source
AI summary
An optical assembly includes a plurality of light sources emitting light in a first direction at a predetermined orientation angle, and a light guide panel having a light incident section and a light emitting section. The light incident section has a first surface to receive the light emitted from the light sources in the first direction and the light emitting section is to emit light received from the light incident section in a second direction. Also included is at least one cover having a first surface adjacent the light sources and a second surface adjacent at least one portion of the light emitting section.