Optical Sheet Distinction Units for Backlight Assembly
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Solution Overview
Problem
Conventional optical sheets in backlight assemblies are difficult to distinguish, leading to incorrect arrangement and potential malfunction of passive type display devices, as they have the same shape and lack clear differentiation during assembly.
Innovation Solution
Incorporating distinction units with unique markings such as numbers, characters, or barcodes on guide units of optical sheets, which are spaced or positioned differently to facilitate correct selection and arrangement, allowing for verification of the correct stacking order through varying luminosity and visibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If conventional optical sheets are used with the same shape, then manufacturing cost is reduced and manufacturing process is simplified, but workers cannot clearly distinguish different optical sheets leading to incorrect arrangement
Solution Approach 1:
The patent applies color changes by incorporating distinction units with different colors on different optical sheets. This allows workers to easily distinguish between various optical sheets during assembly without changing the basic manufacturing process of the optical sheets themselves. The colored distinction units are added as a simple visual marker that resolves the identifiability issue while maintaining manufacturing simplicity.
Solution Approach 2:
The patent applies local quality by adding distinction units only at specific locations (edges or corners) of optical sheets rather than changing the entire optical sheet. This localized modification provides the necessary visual differentiation for easy identification during assembly while keeping the manufacturing process simple and the majority of the optical sheet unchanged.
2Ease of operation
If distinction units are added to optical sheets, then workers can clearly identify and arrange optical sheets correctly, but device complexity increases
Solution Approach 1:
The patent applies taking out by separating the identification function from the main optical sheet structure. The distinction units are extracted as independent elements that can be easily added or removed without affecting the core optical functionality of the sheets. This minimizes the increase in device complexity while still providing the necessary identification capability.
Solution Approach 2:
The patent applies this principle by using simple, inexpensive distinction units that can be easily manufactured and attached to optical sheets. These distinction units are basic visual markers (such as colored regions or simple patterns) that add minimal complexity and can be produced at low cost, resolving the identifiability issue without significantly increasing overall device complexity.
3Reliability
If multiple optical sheets with different functions are used, then light control performance is improved, but difficulty of detecting and measuring correct arrangement increases
Solution Approach 1:
The patent applies feedback by incorporating distinction units that provide immediate visual confirmation of correct optical sheet arrangement. When optical sheets are stacked in the correct order, the distinction units create a recognizable pattern or sequence that gives workers instant feedback that the assembly is correct. This simple visual feedback system makes verification straightforward without affecting the light control performance of the multiple optical sheets.
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
Minimizes the likelihood of incorrect assembly and subsequent malfunction by enabling workers to clearly identify and stack optical sheets correctly, ensuring proper functioning of display devices.
Implementation Method 1
The optical sheets serve to diffuse and condense incident light
Implementation Method 2
The optical sheets serve to diffuse and condense incident light
Data Source
AI summary
A set of optical sheets may perform at least one of diffusion, refraction, and condensation of light. The set of optical sheets may include a first optical sheet that includes a first base film and a first distinction unit disposed outside the first base film. The set of optical sheets may further include a second optical sheet that includes a second base film and a second distinction unit disposed outside the second base film. The second distinction unit may be spaced from the first distinction unit in a plan view of the set of optical sheets if the second base film complete overlaps the first base film.