Bent Side Plate Portions for Thin LCD Strength
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Solution Overview
Problem
In liquid crystal display apparatuses, achieving a thin structure while maintaining strength is challenging, particularly when a reflective liquid crystal panel and a back-side frame need to be close, as the back-side frame's design restricts the formation of bent portions that could secure the flexible wiring substrate, leading to potential strength issues.
Innovation Solution
A liquid crystal display apparatus design featuring a quadrangular liquid crystal panel with a reflection layer, a light guiding plate laminated on the display surface, and a back-side frame with bent side plate portions that restrict the light guiding plate's position, along with a light source holding plate with LEDs, allows for a thin structure while securing the panel and frame proximity and preventing wiring substrate interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If the back-side frame is positioned close to the liquid crystal panel to achieve a thin structure, then the overall thickness is reduced, but the strength and structural stability deteriorate due to restricted bent portion formation
Solution Approach 1:
The bent side plate portions extend in the thickness direction (vertical dimension) from the back-side frame, creating structural support in a different dimension rather than relying solely on horizontal bent portions. This allows the frame to maintain strength while being positioned closer to the liquid crystal panel.
Solution Approach 2:
The back-side frame is segmented into multiple side plate portions, each capable of independent bending. These bent side plate portions are positioned at different locations to provide distributed structural support, replacing the need for a single large bent portion that would interfere with the thin structure design.
2Reliability
If bent portions are formed on the back-side frame to secure the flexible wiring substrate, then the wiring substrate is protected and positioned, but the distance between the back-side frame and liquid crystal panel increases, preventing a thin structure
Solution Approach 1:
The bent side plate portions are localized at specific positions on the back-side frame where structural support is needed, rather than forming large extended bent portions across the entire frame. This localized bending provides wiring substrate protection at critical points while maintaining overall frame proximity to the liquid crystal panel.
Solution Approach 2:
Instead of forming bent portions that extend horizontally away from the frame (in the plane of the frame), the bent side plate portions extend vertically in the thickness direction. This dimensional change allows wiring protection without increasing the horizontal distance between the frame and liquid crystal panel.
3Manufacturing precision
If the light guiding plate position is restricted by bent side plate portions, then positional deviations are prevented, but the structural complexity increases
Solution Approach 1:
The bent side plate portions serve multiple functions simultaneously: they provide structural support to maintain frame strength, protect the flexible wiring substrate, and restrict the position of the light guiding plate. This multi-functionality reduces the need for separate components for each function, thereby limiting the increase in structural complexity.
Solution Approach 2:
The positioning function for the light guiding plate is merged with the structural support function of the bent side plate portions. The same structural elements that provide mechanical strength and wiring protection also serve as positioning restrictions, consolidating multiple functions into a single structural feature.
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 design secures the strength of the apparatus while enabling a thin structure where the liquid crystal panel and back-side frame can be close, preventing positional deviations and thermal expansion issues, and reducing material costs by optimizing the light guiding plate's shape and frame assembly.
Implementation Method 1
configured to diffusely reflect light incident from one end surface of the light guiding plate and emit the light toward the display surface
Data Source
AI summary
A liquid crystal display apparatus includes a quadrangular liquid crystal panel having a reflection layer on a back surface opposite to a display surface, a light guiding plate that diffusely reflects light incident from one end surface of the light guiding plate toward the display surface, a back-side frame disposed in parallel with the liquid crystal panel on a side opposite to the light guiding plate, and a light source holding plate including a light source fixing plate that faces the one end surface and a fixing plate portion fixed to a surface of the back-side frame on a side opposite to the liquid crystal panel. A light source is mounted on the light source fixing plate, and the fixing plate portion is formed so as to be bent perpendicularly to the light source fixing plate.