Backlight Unit Light Guide Plate Fixing via Segmented Case Assembly
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Solution Overview
Problem
The existing edge type backlight units in display devices face assembly defects due to inadequate space for the light guide plate, leading to reduced quality and reliability, as the light guide plate is not stably disposed within the accommodating case, causing instability and potential cracking or sagging.
Innovation Solution
A backlight unit design that includes a light guide plate, a light source unit, an accommodating case with a case side wall that supports the light guide plate, and a light guide plate fixing member to prevent movement and maintain a stable position, ensuring proper assembly and preventing defects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the light guide plate is assembled after the light guide plate fixing member is attached on the accommodating case, then the light guide plate can be fixed in position, but insufficient assembly space causes assembly defects and unstable disposal
Solution Approach 1:
The accommodating case is divided into a first accommodating case and a second accommodating case. The light guide plate fixing member is attached to the first accommodating case, while the light guide plate is disposed in the second accommodating case. This segmentation allows the light guide plate to be assembled after the fixing member is attached, providing sufficient assembly space while ensuring stable disposal and preventing assembly defects.
2Ease of manufacture
If the light guide plate is not stably disposed in the accommodating case, then assembly is simpler, but the light guide plate hangs on the fixing member causing quality reduction
Solution Approach 1:
By dividing the accommodating case into two separate cases, the light guide plate can be freely assembled in the second accommodating case without being constrained by the fixing member attachment process. The first accommodating case holds the fixing member, while the second accommodating case provides stable disposal space for the light guide plate, preventing hanging and ensuring high quality.
3Volume of moving object
If sufficient space is not provided for assembling the light guide plate, then the device structure is more compact, but assembly defects occur and quality reduces
Solution Approach 1:
The accommodating case is segmented into two parts: the first accommodating case for the fixing member and the second accommodating case for the light guide plate. This segmentation provides sufficient assembly space for the light guide plate while maintaining a compact overall structure, as the two cases can be closely integrated. The separation ensures that assembly defects are prevented while preserving device compactness.
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 enhances the quality and reliability of the display device by stabilizing the light guide plate, preventing cracking and sagging, and maintaining a consistent interval between the light guide plate and the light source unit, thus maintaining brightness and image quality.
Implementation Method 1
The light guide plate guides light emitted from a light source (not shown) to output the light to an upper portion, thereby irradiating the light onto a rear surface of a display panel (not shown)
Implementation Method 2
The reflective sheet 2 is disposed on a rear surface of the light guide plate 1 to reflect light, irradiated onto a lower side of the light guide plate 1, to the inside of the light guide plate 1, thereby enhancing light efficiency
Data Source
AI summary
Disclosed are a backlight unit and a display device including the same. The backlight unit includes a light guide plate, a light source unit irradiating light onto a light incident surface provided on a side surface of the light guide plate, an accommodating case including a case side wall which supports the light guide plate and surrounds a side surface of the light guide plate, and a light guide plate fixing member installed on the case side wall to prevent a movement of the light guide plate.