LCD Frame Unit Inverted U-Groove Mating Face Eversion Prevention
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Solution Overview
Problem
In LCD assemblies, the intermediate frame can experience eversion due to counterforces applied by the light guide plate, potentially damaging the display.
Innovation Solution
The design includes a frame unit with a holder part and an intermediate frame, featuring a mating portion with an inclined mating face that abuts into an inverted U-shaped groove on the intermediate frame, providing balanced counterforces to prevent eversion. The holder part supports the light guide plate, and the intermediate frame is pressed against it, ensuring the frame remains stable.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the intermediate frame presses against the light guide plate for fixing, then the light guide plate is fixed securely, but the intermediate frame experiences eversion due to counterforce and may damage the LCD
Solution Approach 1:
The patent applies preliminary anti-action by designing the holder part with a counterbalancing structure that pre-establishes an opposing force to counteract the eversion tendency of the intermediate frame. The holder part is positioned and configured to automatically generate a counterforce that balances the pressure force applied by the intermediate frame on the light guide plate, preventing frame eversion before it occurs.
Solution Approach 2:
The patent implements the counterweight principle by creating a counterbalancing force system where the holder part generates an opposing force to balance the pressure force. This counterforce mechanism ensures that the intermediate frame remains in equilibrium, with the holder part's positioning and structural design providing the necessary counterbalancing action to prevent frame deformation.
2Reliability
If the intermediate frame presses against the light guide plate, then the light guide plate is fixed, but the counterforce causes the intermediate frame to reverse
Solution Approach 1:
The holder part is designed with a specific structure and positioning that enables it to generate a counterforce in advance, opposing the harmful reversal effect. This preliminary anti-action is built into the mechanical structure, where the holder part's configuration automatically produces the balancing force needed to counteract the counterforce-induced reversal of the intermediate frame.
Solution Approach 2:
The patent creates a counterbalancing force system where the holder part provides an opposing force that neutralizes the harmful counterforce. This counterweight mechanism transforms the harmful counterforce into a balanced system, preventing frame reversal and potential damage to the LCD assembly.
3Stability of the object's composition
If the mating face is inclined to provide counterbalance, then frame stability is improved, but the structure becomes more complex
Solution Approach 1:
The patent applies local quality by introducing the inclined mating face only at the specific location where force balancing is needed, rather than redesigning the entire holder part structure. The inclination is localized to the mating face that contacts the intermediate frame, providing the necessary counterbalancing function while keeping the rest of the structure simple and straightforward.
Solution Approach 2:
The inclined mating face introduces a controlled asymmetry to the otherwise symmetric holder part structure. This asymmetric design element at the mating surface creates the mechanical advantage needed for force balancing, allowing the simple overall structure to achieve complex force equilibrium functionality through a localized geometric modification.
Data Source
AI summary
The present invention discloses a liquid crystal display and a backlight module and a frame unit thereof. The frame unit includes a holder part and an intermediate frame. The holder part is provided with a supporting portion and a vertical portion. The supporting portion supports the light guide plate, and the mating portion is disposed on the side of the vertical portion away from the supporting portion. The mating portion is provided with a mating face, and the mating face tilts from the side of the vertical portion close to the light guide plate to the side of the vertical portion away from the light guide plate. The intermediate frame presses against the light guide plate, and an inverted U-shaped groove is disposed on the intermediate frame. A mating portion is disposed in the inverted U-shaped groove, and a mating face abuts on the inner surface of the inverted U-shaped groove close to the light guide plate. The present invention can solve the eversion problem of the intermediate frame of the liquid crystal display.