Quantum Dot Glass Aging Device Luminance Uniformity
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The use of a quantum dot (QD) layer on light guide plates in backlight units for displays reduces light transmittance, leading to lower brightness and luminance uniformity, as the light incident on one side of the QD glass has lower luminance when emitted on the opposite side.
Innovation Solution
A QD glass aging device and method that includes a jig part with protrusion parts and grooves for simultaneously exposing multiple QD glasses to light from multiple light sources, increasing luminance and uniformity by optimizing the light transmission through the QD layer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a QD layer is disposed on a light guide plate to improve color purity, then color purity is improved, but light transmittance is lowered and luminance uniformity is lowered
Solution Approach 1:
The patent applies preliminary action by performing an aging process on the QD glass before final assembly. The QD glass is exposed to light from light sources for a predetermined time to allow luminance to increase and stabilize, compensating for the initial low luminance uniformity caused by the QD layer. This pre-treatment ensures that by the time the product is assembled and shipped, the QD glass has already developed sufficient luminance uniformity.
2Illumination intensity
If light is continuously transmitted through the QD layer to increase luminance, then luminance uniformity is improved, but processing time is extended
Solution Approach 1:
The patent applies parameter changes by optimizing the aging process parameters including light intensity, aging duration, and light source positioning. By carefully controlling these parameters, the patent achieves sufficient luminance uniformity improvement within a predetermined reasonable time frame, balancing the trade-off between luminance enhancement and processing time.
3Manufacturing precision
If only one QD glass is processed at a time in the aging process, then processing quality is maintained, but production efficiency is reduced
Solution Approach 1:
The patent applies segmentation by dividing the aging process into multiple independent processing zones. Multiple QD glasses are placed on a substrate and each is exposed to light from dedicated light sources simultaneously. This segmented approach allows parallel processing of multiple QD glasses while maintaining consistent aging quality for each, thereby significantly improving production efficiency.
Solution Approach 2:
The patent merges multiple aging processes into a single unified operation. Instead of processing QD glasses sequentially, the system combines multiple QD glasses and their corresponding light sources into one integrated aging setup, allowing simultaneous treatment of multiple items and achieving both quality consistency and high productivity.
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 QD glass aging device enhances luminance uniformity by increasing the luminance of the light-emitting side, particularly the initially lower luminance side, and improves the efficiency of the aging process by treating multiple QD glasses simultaneously.
Implementation Method 1
The light generated from the light source is provided to the QD glass for a predetermined time, and the light guided upwardly in the light guide plate continuously transmits the QD layer
Implementation Method 2
a backlight unit including a quantum dot ('QD') layer disposed on a light guide plate is used to improve color purity
Data Source
AI summary
A quantum dot (“QD”) glass aging device including a bottom part including a flat surface defined by a first direction and a second direction intersecting the first direction; a side wall part including a side surface defined by the first direction and a third direction intersecting the bottom part, and a seating part disposed between the bottom part and the side wall part. The seating part includes a plurality of protrusion parts extending in the first direction and arranged in the second direction. A plurality of QD glasses is arranged on the plurality of protrusion parts. A plurality of light sources is disposed in the plurality of grooves defined between the protrusion parts and between the side wall part and a first protrusion part adjacent to the side wall part. Heights of upper surfaces of the protrusion parts gradually decrease from the side wall part to the bottom part.