Elastic Positioning Pieces for Liquid Crystal Panel Thermal Stress
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Solution Overview
Problem
Liquid crystal display devices face issues with display screen disturbance due to thermal expansion differences between synthetic resin cases and glass substrates, leading to shrinkage and increased pressure on larger panels, which affects image quality.
Innovation Solution
Incorporating elastically deformable positioning pieces that contact opposing sides of the liquid crystal panel to maintain proper positioning along the display surface, reducing the force exerted by the case during temperature changes and preventing screen disturbance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the case is made of synthetic resin to reduce cost and simplify manufacturing, then ease of manufacture is improved, but the thermal coefficient of expansion difference between the case and liquid crystal panel causes display screen disturbance
Solution Approach 1:
A resin layer is introduced as an intermediary between the synthetic resin case and the liquid crystal panel. This resin layer has a thermal coefficient of expansion matched to the liquid crystal panel, serving as a buffer that absorbs differential expansion forces and prevents display screen disturbance while maintaining the cost advantages of synthetic resin construction
Solution Approach 2:
The thermal coefficient of expansion parameter is modified by adding a specific resin layer between the case and panel. This layer's thermal properties are specifically selected to match the liquid crystal panel, creating a gradient that compensates for the high expansion rate of the synthetic resin case and maintains display stability across temperature variations
2Manufacturing precision
If the liquid crystal panel size is increased to improve display quality, then image quality is improved, but the force exerted by the shrinking case on the panel increases causing display screen disturbance
Solution Approach 1:
The resin layer acts as a mediator that distributes and reduces the thermal expansion forces from the synthetic resin case. By matching the thermal properties to the liquid crystal panel, it prevents the concentrated forces that would otherwise occur on larger panels, enabling size increase without compromising display quality
Solution Approach 2:
The resin layer provides beforehand cushioning against thermal expansion forces. By pre-positioning this buffer layer with matched thermal properties, the system is prepared to absorb expansion forces before they can damage the display screen, enabling larger panel sizes to be used safely
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
Ensures stable image quality across varying temperatures and size increases by reducing the force on the liquid crystal panel, while also simplifying component design and reducing costs.
Implementation Method 1
the positioning pieces may each be formed to be elastically deformable along a plane direction of the liquid crystal panel
Data Source
AI summary
A liquid crystal display device is disclosed. The device may include a case; and a square-shaped flat liquid crystal panel incorporated inside of the case. In the device, the case may include a square-frame-shaped rear wall abutting a rim portion of a rear surface located on a side opposite to a display surface of the liquid crystal panel, and a square-frame-shaped front wall abutting a rim portion of the display surface of the liquid crystal panel, and sandwiching the liquid crystal panel with the rear wall, a pair of positioning pieces may be provided to either the rear wall or the front wall for positioning of the liquid crystal panel with respect to the case by respectively coming in contact with side portions of the liquid crystal panel that are opposing each other, and the positioning pieces may each be formed to be elastically deformable along a plane direction of the liquid crystal panel.