Reflective Sheet and Lens Hole Structure for Uniform Display Lighting
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing display devices face issues with reflective sheets being improperly inserted or separated from the lens-substrate interface, leading to mura and uneven light distribution, which affects image quality and color representation.
Innovation Solution
A display device design featuring a reflective sheet with protrusions on its border, designed to fit securely around a lens, ensuring stable attachment to the frame and minimizing separation even under impact or vibration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the reflective sheet is simply placed between the substrate and lens without additional securing structures, then the device complexity is reduced, but the reflective sheet may separate from the lens-substrate interface under impact or vibration, causing mura and uneven light distribution
Solution Approach 1:
The reflective sheet is segmented into a body portion and protrusion portions that extend into the hole of the lens. This segmentation allows the protrusions to anchor the reflective sheet within the lens hole, preventing separation while maintaining overall structural simplicity.
Solution Approach 2:
The protrusion portions of the reflective sheet are nested within the hole of the lens, creating a secure fit. The reflective sheet body is positioned between the substrate and lens, with protrusions extending into the lens hole to prevent displacement, achieving reliable positioning without complex external structures.
2Reliability
If the reflective sheet is secured with complex attachment structures, then the stability and reliability of the reflective sheet position is improved, but the manufacturing process becomes more complex and costly
Solution Approach 1:
The reflective sheet is designed with integrated protrusion portions that are formed as part of the sheet structure. This segmentation into body and protrusion portions allows for simple manufacturing processes while achieving secure attachment, avoiding the need for separate fasteners or complex assembly steps.
Solution Approach 2:
The protrusion portions of the reflective sheet automatically engage with the lens hole structure to provide self-securing functionality. The design allows the reflective sheet to secure itself within the lens-substrate assembly without requiring additional attachment mechanisms or complex manufacturing processes.
3Illumination intensity
If the reflective sheet is positioned too close to the lens, then the light distribution uniformity is improved, but the reflective sheet may become detached under vibration or impact
Solution Approach 1:
The protrusion portions of the reflective sheet are nested within the hole of the lens, creating a secure mechanical interlock. This nesting structure allows the reflective sheet to be positioned close to the lens for optimal light distribution while the protrusions prevent detachment under vibration or impact by anchoring the sheet within the lens structure.
Solution Approach 2:
The reflective sheet is divided into a body portion for light reflection and protrusion portions for mechanical anchoring. This segmentation allows the body to be positioned close to the lens for improved light uniformity while the protrusions extend into the lens hole to provide separation resistance, simultaneously achieving both optical and mechanical performance.
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 design stabilizes the reflective sheet's position, preventing separation and enhancing uniform light distribution, thereby improving image quality and reducing mura defects.
Implementation Method 1
a lens including a body spaced apart from the substrate and covering the light source
Implementation Method 2
a reflective sheet having a hole in which the lens is located and covering the substrate
Data Source
AI summary
A display device may include a display panel; a frame; a light source located on a substrate; a lens including a body spaced apart from the substrate and covering the light source, and legs protruding from the body and coupled to the substrate; and a reflective sheet having a hole in which the lens is located and covering the substrate, wherein a boundary of the hole comprises: first and second straight sections opposite each other with respect to a center of the hole; first and second curved sections opposite each other with respect to the center of the hole and connecting the first and second straight sections; and an end of a protrusion protruding from the first straight section or the second straight section toward an inside of the hole, and wherein a portion of a rear surface of the body may overlap the protrusion in a forward-backward direction.