Optical Sheet Unit Bonding Prism and Diffusion Layers
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional back light modules for liquid crystal displays require separate assembly of multiple optical sheets, increasing assembly time and defect risk while also increasing thickness due to gaps between components.
Innovation Solution
An integrated optical sheet unit is created by bonding a prism sheet unit with a diffusion sheet using a bonding layer with a refractive index difference, incorporating beads for enhanced light diffusion, and protuberances for improved light scattering, reducing assembly time and thickness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If multiple optical sheets are assembled separately in frames or housings, then each sheet can be individually positioned, but assembly time increases and defect risk increases
Solution Approach 1:
The patent combines multiple separate optical sheets (prism sheet, diffusion sheet, protection sheet) into a single integrated optical sheet unit. This merging eliminates the need for separate assembly operations while maintaining the functional benefits of each individual sheet, thereby reducing assembly time and defect risk without sacrificing positioning accuracy.
2Ease of manufacture
If multiple optical sheets are assembled separately, then each sheet can be independently manufactured, but total thickness increases due to gaps between sheets
Solution Approach 1:
By integrating multiple optical sheets into a single unit with eliminated gaps between interfaces, the patent reduces the total thickness while preserving the manufacturing flexibility of producing each sheet layer separately before integration.
3Manufacturing precision
If multiple optical sheets are assembled separately, then quality control can be applied to each sheet, but the possibility of assembly defects increases
Solution Approach 1:
The integrated optical sheet unit reduces the number of assembly interfaces, thereby minimizing the opportunities for assembly defects such as misalignment, gaps, or contamination that can occur when assembling multiple separate sheets, while still allowing quality control measures to be applied during the manufacturing of each integrated layer.
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 integrated optical sheet unit minimizes assembly defects, reduces thickness, and enhances light diffusion efficiency, making it easier to assemble and increasing productivity.
Implementation Method 1
a bonding layer formed between the prism sheet unit and the diffusion sheet to bond entire surfaces that the prism sheet unit and the diffusion sheet mutually face
Implementation Method 2
a prism sheet unit arranged at a position facing the diffusion sheet to concentrate the incident light from the diffusion sheet
Implementation Method 3
a diffusion sheet for diffusing incident light such that the light can be uniformly emitted
Data Source
AI summary
The present invention may relate to an optical sheet unit. According to an embodiment of the present invention, disclosed is an optical sheet unit comprising: a diffusion sheet for diffusing incident light such that the light can be uniformly emitted; a prism sheet unit arranged at the position facing the diffusion sheet to concentrate the light incident from the diffusion sheet; and a bonding layer formed between the prism sheet unit and the diffusion sheet to bond the entire surfaces of the prism sheet unit and the diffusion sheet facing each other.