Backlight Unit Groove Stoppers for LED Fixation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional backlight units for LCDs, particularly those using CCFLs, face issues of high power consumption, limited color reproduction, and environmental concerns due to mercury content, necessitating a more efficient and environmentally friendly solution.
Innovation Solution
A backlight unit design that incorporates a light guide plate with grooves and stoppers to securely position light source modules, utilizing LEDs for improved power efficiency and color reproduction, with the stoppers being attached using adhesive agents and fastening members to enhance stability and optical performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If CCFLs are used as light sources in backlight units, then the display can achieve sufficient brightness, but power consumption increases and color reproduction deteriorates
Solution Approach 1:
The backlight unit is divided into multiple light source modules, each containing multiple LEDs arranged in series. This segmentation allows the total voltage requirement to be distributed across multiple lower-voltage LED components while maintaining overall brightness output, thereby achieving high brightness with reduced power consumption compared to traditional CCFL solutions
Solution Approach 2:
The patent transitions from CCFL technology to LED technology, changing the fundamental light generation mechanism. LEDs operate at lower power consumption levels while providing equivalent or superior brightness output, directly resolving the contradiction between illumination intensity and energy usage
2Illumination intensity
If CCFLs are used as light sources, then the backlight unit can provide sufficient illumination, but color reproduction rate is limited to about 70% of CRT
Solution Approach 1:
Each light source module contains multiple LEDs that can be configured with different phosphor coatings or wavelengths. This segmentation enables precise control over the spectral composition of light from each module, allowing for superior color reproduction exceeding 100% of NTSC standards while maintaining sufficient illumination
Solution Approach 2:
The patent employs LED technology with advanced phosphor conversion or multi-wavelength LED arrays, fundamentally changing the light emission spectrum compared to CCFLs. This parameter change in the light source characteristics enables vastly improved color reproduction capability while providing adequate illumination
3Volume of moving object
If stoppers are made smaller to fit in grooves, then the structure becomes more compact, but fixation stability may be compromised
Solution Approach 1:
The stoppers utilize the depth dimension of the grooves to achieve stable fixation. By extending vertically into the groove space, the stoppers create effective mechanical engagement without requiring increased horizontal footprint, thus maintaining compact overall structure while ensuring reliable fixation stability
Solution Approach 2:
The stoppers are nested within the grooves of the light guide plate, with the groove geometry designed to accommodate the stopper shape. This nesting arrangement allows the stoppers to be compact yet securely positioned, achieving both small volume and high fixation reliability through precise geometric matching
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 reduces power consumption, enhances color reproduction beyond traditional standards, and mitigates environmental impact by using LEDs and a stable module fixation system, improving the overall reliability and efficiency of the backlight unit.
Implementation Method 1
The stoppers may be attached to substrates of the light source modules by an adhesive agent. The stoppers may be attached to the bottom surfaces of the grooves of the light guide plate by an adhesive agent.
Implementation Method 2
research into a backlight unit using light emitting diodes (LEDs) has been conducted. If LEDs are used as the backlight unit, an LED array may be partially turned on/off and thus power consumption may be considerably reduced.
Implementation Method 3
grooves disposed in the light guide plate, the grooves having at least one inclined surface
Data Source
AI summary
Disclosed are a backlight unit and a display apparatus using the same. The backlight unit includes a light guide plate, grooves disposed in the light guide plate, the grooves having at least one inclined surface, light source modules disposed within the grooves, and stoppers disposed between the light source modules and the light guide plate, wherein a cross-sectional area of the grooves is larger than that of the stoppers. The stoppers contact at least one of the side surfaces of the grooves, the bottom surfaces of the grooves and the light source modules.