LED Backlight Light Guide Plate Fixation Structure
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Solution Overview
Problem
Existing LED backlight units for liquid crystal displays lack a secure light guide plate fixing structure, leading to potential movement and decreased luminance due to external shocks, which affects image quality and uniform light distribution.
Innovation Solution
The implementation of a fixation unit with a head and body that securely attaches to the light guide plates through through holes and mounting slots, using a screw structure formed from transparent material, ensuring the light guide plates are firmly fixed to the lower cover, preventing movement and maintaining consistent spacing for uniform light distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If light guide plates are arranged on the lower cover without a definite fixing structure, then assembly is simplified, but the light guide plates may move under external shocks causing decreased luminance and image quality degradation
Solution Approach 1:
The light guide plate is divided into multiple separate plates arranged in parallel, each with through holes for fixation. This segmentation allows for easier assembly while enabling reliable fixing through individual attachment points, resolving the contradiction between assembly simplicity and stability.
Solution Approach 2:
Fixation units are installed in advance on the lower cover at predetermined positions before the light guide plates are assembled. This preliminary action ensures that when the light guide plates are installed, they can be immediately and securely fixed, preventing movement under external shocks while maintaining simple assembly procedures.
2Ease of operation
If light guide plates are not firmly fixed, then assembly is easier, but movement occurs under external shocks leading to decreased luminance
Solution Approach 1:
The light guide plate is segmented into multiple plates with through holes, allowing for easy assembly while enabling firm fixation. The segmentation creates discrete attachment points that secure each plate individually, preventing movement that would cause luminance decrease.
Solution Approach 2:
Fixation units are preliminarily installed on the lower cover before assembling the light guide plates. This ensures that when the plates are installed, they are immediately secured, preventing any movement under external shocks that would affect luminance uniformity.
3Reliability
If a fixation structure is added to secure light guide plates, then stability and luminance are improved, but device complexity increases
Solution Approach 1:
The light guide plate is divided into multiple segments with through holes, which simplifies the fixation structure compared to fixing a single large plate. Each segment can be independently secured with simple fixation units, reducing overall structural complexity while improving stability.
Solution Approach 2:
Fixation units serve as intermediaries between the lower cover and the light guide plates. These units provide a simple mechanical connection that secures the plates without requiring complex fixing mechanisms, thus improving stability while minimizing added complexity.
4Adaptability or versatility
If light guide plates are not fixed with consistent spacing, then assembly is more flexible, but light distribution uniformity decreases
Solution Approach 1:
The light guide plate is segmented into multiple plates arranged in parallel with through holes at predetermined positions. This segmentation allows for flexible assembly while the predetermined through hole locations ensure consistent spacing, maintaining light distribution uniformity.
Solution Approach 2:
Fixation units are preliminarily positioned at predetermined intervals on the lower cover, establishing consistent spacing before the light guide plates are assembled. This preliminary positioning ensures uniform light distribution while allowing flexible assembly of the plate components.
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 solution enhances the stability and luminance of the LED backlight unit by preventing light guide plate movement and ensuring consistent light distribution to the liquid crystal panel, thereby improving image quality and meeting miniaturization requirements.
Implementation Method 1
a plurality of LED packages 232 mounted on the board 231 and supplying light
Implementation Method 2
light supplied from the side is guided using light guide plates and is then directed perpendicularly toward the liquid crystal panel
Data Source
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AI summary
There is provided a liquid crystal display device using a light guide plate dividing method that clearly establishes a structure for fixing divided light guide plates. An LED backlight unit according to an aspect of the invention may include: a lower cover having a mounting hole therein; a board provided on the lower cover and having a through hole facing the mounting hole of the lower cover; a plurality of LED packages mounted onto the board and supplying light; a light guide plate provided on the lower cover and guiding light supplied from the LED packages; and a fixation unit inserted into the mounting hole and the through hole so that the light guide plate is pressed against the lower cover.