Backlight Unit Support Side Structure for Corner Illumination
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Solution Overview
Problem
In liquid crystal display devices, particularly in direct-type backlight units, there is a non-uniform light distribution leading to dark areas in the corners of the display, which affects the overall luminance and image quality, especially in large-sized screens or multivision display setups where images are divided across multiple units.
Innovation Solution
The design incorporates a support side structure with distinct first and second support sides on the bottom cover, featuring vertical and inclined portions with different orientations to redirect light uniformly across the liquid crystal panel, ensuring even illumination, including the corners, by adjusting the angles and positions of these support sides relative to the light sources and diffuser plates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a support side structure with inclined portions is added to redirect light to corner areas, then light uniformity in corner areas is improved, but device complexity increases
Solution Approach 1:
The support side structure implements local quality by providing different geometries for different regions: vertical portions for general support and inclined portions specifically positioned to redirect light toward corner areas. This localized structural differentiation addresses the light uniformity problem in corners without requiring complete structural redesign throughout the entire device.
Solution Approach 2:
The support side structure transitions from a simple planar configuration to a three-dimensional form with vertical and inclined portions. This dimensional change enables the structure to redirect light paths toward corner areas that would otherwise be underserved, improving light uniformity through spatial manipulation rather than adding separate components.
2Illumination intensity
If the support side structure is designed with specific incline angles to improve corner illumination, then light distribution uniformity is improved, but manufacturing precision requirements increase
Solution Approach 1:
The support side structure utilizes specific geometric parameters (vertical portions, inclined portions with defined angles) to control light redirection. By optimizing these parameters during design, the structure achieves effective corner illumination while establishing clear manufacturing specifications that balance precision requirements with manufacturability.
3Illumination intensity
If multiple support sides with different orientations are used to redirect light uniformly, then dark areas in corners are reduced, but the number of components increases
Solution Approach 1:
The support side structure merges multiple functional elements into a single integrated component. Rather than using separate components for vertical support and light redirection, the structure combines these functions into one unified element with both vertical and inclined portions, reducing component count while maintaining light uniformity improvement.
Solution Approach 2:
The support side structure achieves multi-functionality by simultaneously providing structural support through its vertical portions and light redirection toward corners through its inclined portions. This universal design allows a single component to fulfill multiple roles, avoiding the need for additional dedicated light redirection 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 configuration significantly reduces light deviations and dark areas, providing uniform luminance across the entire display surface, enhancing image quality and addressing the issue of dark corners in both single and multi-unit display setups.
Implementation Method 1
Light generated from the light sources 1 is scattered and refracted through the diffuser plate 4 and the optical sheets 5 and then diffused toward an entire surface of the liquid crystal panel 6
Implementation Method 2
Light generated from the light sources 1 is scattered and refracted through the diffuser plate 4 and the optical sheets 5
Data Source
AI summary
A backlight unit includes a bottom cover; a plurality of light sources on the bottom cover; a first support side at an area directly along a first edge of the bottom cover adjacent to a corner of the bottom cover; and a second support side directly adjacent to the first support side and along the first edge of the bottom cover. The first support side includes a first vertical portion, and a first inclined portion connected to a top of the first vertical portion. The second support side includes a second vertical portion, and a second inclined portion connected to a top of the second vertical portion.