Reflective Plate Sidewalls LCD Brightness
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Solution Overview
Problem
The high manufacturing costs of liquid crystal displays (LCDs) due to the inclusion of a mold frame, which also reduces optical efficiency when removed, necessitate a design that omits the mold frame while maintaining or improving optical efficiency.
Innovation Solution
A liquid crystal display design that incorporates a reflective plate with side walls surrounding the light guide plate and a bottom chassis with step differences, allowing for improved light reflection and accommodation of optical sheets, thereby enhancing optical efficiency without the mold frame.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the mold frame is removed to reduce manufacturing costs, then manufacturing cost is reduced, but optical efficiency deteriorates due to reduced light reflection
Solution Approach 1:
The reflective plate is merged with the bottom plate to form an integrated structure. The bottom plate serves dual functions as both the base support and the reflective surface, eliminating the need for a separate mold frame while maintaining light reflection capability. This combination reduces the number of components and manufacturing costs while preserving optical efficiency.
Solution Approach 2:
The bottom plate is designed to perform multiple functions: structural support, light reflection, and housing for the backlight assembly. By making the bottom plate multi-functional, the patent eliminates the need for the separate mold frame, reducing manufacturing cost while maintaining or improving optical efficiency through the reflective properties of the bottom plate.
2Ease of manufacture
If the mold frame is removed to reduce manufacturing costs, then manufacturing cost is reduced, but structural integrity deteriorates
Solution Approach 1:
The mold frame's structural functions are merged into the bottom plate and side wall structures. The bottom plate provides a solid base, while the side walls extend from it to form a housing structure, collectively performing the structural support and containment functions previously handled by the mold frame.
Solution Approach 2:
The housing structure is segmented into the bottom plate and side walls as separate functional elements that work together. The bottom plate provides the base structure, while the side walls provide vertical support and containment, distributing the structural load and maintaining integrity without requiring a traditional mold frame.
3Loss of energy
If side walls are added to the reflective plate to improve light reflection, then optical efficiency is improved, but device complexity increases
Solution Approach 1:
The side walls are merged with the bottom plate to form an integrated reflective structure. This combination creates the housing structure and light reflection surfaces in a single integrated component, improving optical efficiency while avoiding the complexity of separate mold frame and reflective plate assemblies.
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 achieves a 10% increase in brightness and maintains manufacturing cost reduction by utilizing a reflective plate with higher reflectance and a metal-strengthened bottom chassis, ensuring improved optical efficiency and structural integrity.
Implementation Method 1
light emitted to the sides of the light guide plate is less apt to be reflected back into the back light
Data Source
AI summary
A liquid crystal display design that reduces manufacturing costs and improves optical efficiency. The LCD includes a liquid crystal display panel, a light guide plate arranged on a rear surface of the liquid crystal display panel, a reflective plate that includes a bottom plate and a plurality of sidewalls attached to the bottom plate, the bottom plate of the reflective plate being arranged on a rear surface of the light guide plate to accommodate the light guide plate and the plurality of side walls of the light guide plate extending from the bottom plate to surround sides of the light guide plate and a bottom chassis arranged on a rear side of the reflective plate to accommodate the liquid crystal display panel, the light guide plate, and the reflective plate.