Segmented Light Guiding Plate for Spherical LCD Backlight
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Forming a light guiding plate with a spherical surface to match a spherical liquid crystal display panel is challenging due to difficulties in molding resin-based light guiding plates using injection molding.
Innovation Solution
A light guiding plate is created by forming a resin in sheet form with a curve, which is then processed and molded using a die to achieve a spherical shape, allowing for efficient illumination of the liquid crystal display panel.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If injection molding is used to manufacture light guiding plates, then manufacturing efficiency is improved, but the ability to form spherical surfaces is lost
Solution Approach 1:
The light guiding plate is divided into two separate components: a flat light guiding plate manufactured through injection molding, and a spherical light emitting portion formed separately. This segmentation allows each part to be optimized for its specific manufacturing method, with the flat portion ensuring high manufacturing efficiency and the spherical portion providing the required optical surface.
Solution Approach 2:
The flat light guiding plate and the spherical light emitting portion are combined through adhesion to form a complete light guiding plate assembly. This merging allows the system to benefit from both injection molding efficiency for the flat portion and spherical surface capability for the light emitting portion.
2Shape
If a spherical light guiding plate is manufactured through injection molding, then spherical surface is achieved, but manufacturing complexity and time increase
Solution Approach 1:
By segmenting the light guiding plate into a flat injection-molded portion and a separate spherical light emitting portion, the complex spherical molding process is eliminated from the main manufacturing workflow. The spherical portion can be formed using simpler methods such as pressing or adhesion to a pre-formed spherical substrate.
Solution Approach 2:
The spherical light emitting portion is prepared in advance as a separate component with the desired spherical shape, then combined with the flat light guiding plate. This preliminary preparation of the spherical component avoids the need for complex real-time spherical molding during the main assembly process.
3Loss of time
If the light emitting portion is formed by processing resin in sheet form, then manufacturing time is reduced, but structural complexity increases
Solution Approach 1:
The light emitting portion is formed by changing the physical state and processing parameters of resin in sheet form through pressing or heating, transforming it from a flat sheet into a spherical structure. This parameter-based transformation achieves the desired shape quickly without requiring complex multi-step manufacturing processes.
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 method enables the manufacture of a curved light guiding plate with stable quality in a short time, effectively illuminating the liquid crystal display panel with a spherical surface.
Implementation Method 1
a light emitting portion having a curve is formed of a resin in sheet form by applying pressure
Implementation Method 2
a light emitting portion having a curve is formed of a resin in sheet form by applying pressure
Implementation Method 3
Light guiding plates are made of a transparent resin or the like so that light which enters the light guiding plate from the light emitting element propagates through the light guiding plate
Implementation Method 4
Light guiding plates are provided with reflective and light scattering members, such as trenches, protrusions or printed materials, and light that propagates through the light guiding plate is emitted toward the liquid crystal display device through the reflective and light scattering members
Data Source
AI summary
A light guiding plate is manufactured with high precision and in a short period of time in a backlight where light emitting diodes are provided on the side of the light guiding plate, even in the case where the light guiding plate is formed so as to have a spherical surface. In a liquid crystal display device having a backlight for illuminating a liquid crystal panel with light, LED's are provided in a light guiding plate in the backlight as a light emitting element, the light emitting portion of the light guiding plate is formed so as to have a spherical surface by applying heat and pressure to a resin in sheet form, and the light guiding plate is manufactured by fusing a light entering portion formed of a resin through injection molding with the light emitting portion.