Backlight Unit Light Incident Space for Uniform Illumination
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Solution Overview
Problem
Conventional LCD devices with backlight units face challenges in providing uniform light distribution, leading to dark portions and reduced display quality due to the light-emission angle of LEDs and the configuration of light guides and optical sheets.
Innovation Solution
A backlight unit with a main support formed using a mold that opens upward, featuring a light source unit, a circular light guide plate, and optical sheets, along with a light incident space to ensure even light entry and prevent dark portions, enhancing light distribution and display quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If LEDs are mounted on one side of the backlight unit, then the structure is simple and easy to manufacture, but dark portions appear and light distribution becomes non-uniform
Solution Approach 1:
The patent introduces a light incident space that extends the light path from a single-side mounting configuration to a multi-dimensional light distribution path. By creating a dedicated space for light to travel and distribute before reaching the light guide plate, the system achieves uniform illumination while maintaining the simple single-side LED mounting structure.
Solution Approach 2:
The light incident space acts as an intermediary between the LEDs and the light guide plate. This intermediate region allows light to be redistributed uniformly before entering the light guide plate, preventing direct transmission of non-uniform light patterns and eliminating dark portions in the final display.
2Device complexity
If a conventional backlight unit configuration is used, then the structure is compact, but dark areas appear and display quality is reduced
Solution Approach 1:
The patent segments the backlight unit into distinct functional regions: a light source region, a light incident space, and a light guide plate region. This segmentation allows each component to perform its specific function optimally, with the light incident space specifically designed to handle light redistribution, thereby improving display quality without significantly increasing overall structural complexity.
3Device complexity
If light is emitted directly from LEDs to the light guide plate, then the structure is simple, but light distribution is non-uniform and dark portions occur
Solution Approach 1:
The light incident space performs a preliminary action of light redistribution before the light reaches the light guide plate. By pre-distributing and uniformizing the light in this intermediate space, the system prevents the formation of dark portions that would otherwise occur during direct light transmission from LEDs to the light guide plate.
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 solution ensures uniform light distribution across the circular display surface, improving display quality by eliminating dark areas and optimizing light usage, making it suitable for various applications, including circular displays.
Implementation Method 1
a light guide plate disposed parallel to the light source unit and configured to convert dot light emitted from the light source unit into two-dimensional light
Data Source
AI summary
A backlight unit with a new configuration is disclosed. The backlight unit includes: a main support formed using a mold which opens upward; a light source unit disposed on one side of the main support; a light guide plate disposed parallel to the light source unit and configured to convert dot light emitted from the light source unit into two-dimensional light; and optical sheets disposed on the light guide plate. The main support is provided with a light incident space, which allows light emitted from the light source unit to be entirely and evenly entered to the light guide plate, on its one side opposite to the light source unit.