Backlight Module Air Cushion Support for Diffuser Plate
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Solution Overview
Problem
The existing backlight modules for liquid crystal display panels face issues with light blocking and shadow formation due to supporting columns, which degrade the display effect, and the diffuser plate deformation caused by weight and temperature.
Innovation Solution
A backlight module design that uses an air source assembly and nozzles to provide compressed air for flexible support of the diffuser plate, eliminating the need for physical supporting columns and enhancing even light distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If supporting columns are provided on the back plate to support the diffuser plate, then the diffuser plate deformation is prevented, but light blocking and shadow formation occur
Solution Approach 1:
The patent replaces the mechanical supporting columns with an air cushion system. Compressed air is introduced into the cavity between the back plate and diffuser plate, creating an air cushion that provides upward buoyant force to support the diffuser plate's weight, thereby eliminating the need for mechanical columns that block light.
Solution Approach 2:
The patent uses pneumatic pressure from compressed air to support the diffuser plate. An air supply device introduces compressed air into the cavity, and the air pressure generates an upward force that counteracts the diffuser plate's weight, preventing deformation without requiring physical support structures.
2Area of stationary object
If the diffuser plate size is increased with the display device size, then the light distribution area is expanded, but the diffuser plate weight increases causing greater deformation
Solution Approach 1:
The patent uses the air cushion buoyant force to counteract the increasing weight of the larger diffuser plate. The compressed air provides upward force that balances the gravitational force on the expanded diffuser plate, maintaining flatness despite the increased size and weight.
Solution Approach 2:
The patent changes the support mechanism from mechanical contact to pneumatic pressure. By adjusting the compressed air pressure, the system can adapt to different diffuser plate sizes and weights, maintaining optimal support without requiring structural changes to the support system.
3Strength
If supporting columns are added to prevent diffuser plate collapse, then the structural strength is improved, but the display effect deteriorates due to shadow formation
Solution Approach 1:
The patent substitutes mechanical column support with a distributed air pressure field. The compressed air distributes support force uniformly across the entire cavity area, providing equivalent or superior structural support without creating localized blockages that cause shadows.
Solution Approach 2:
The air cushion system serves multiple functions simultaneously: it provides upward support force to prevent collapse, distributes weight uniformly to maintain flatness, and completely avoids light blocking. This multi-functional approach improves both structural strength and light uniformity.
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 solution prevents light blocking, reduces shadow formation, and maintains the diffuser plate's evenness, thereby improving the display effect and extending the backlight module's service life.
Implementation Method 1
an air source assembly and a plurality of nozzles, which nozzles are arranged at intervals, are provided on an outer wall of the bottom plate; the air source assembly is in communication with each of the nozzles for conveying compressed air to each of the nozzle
Implementation Method 2
air jet holes are cut on the bottom plate at positions corresponding to each air jet port of the nozzles, and the nozzles are used for spraying the compressed air through the air jet holes to form air supporting columns
Data Source
AI summary
A backlight module and a display device, including a diffuser plate and a back plate. The back plate includes a bottom plate and a side wall surrounding the bottom plate, the diffuser plate is connected with the side wall; a plurality of light-emitting bodies are provided on an inner wall of the back plate, the diffuser plate is positioned at an out-light side of the light-emitting bodies, an air source assembly and a plurality of nozzles are provided on an outer wall of the bottom plate; the air source assembly is in communication with each nozzle for conveying compressed air to each nozzle, air jet holes are cut on the bottom plate at positions corresponding to each air jet port of the nozzles, and the nozzles are used for spraying the compressed air through the air jet holes to form air supporting columns to support the diffuser plate.