LCD Fixing Part Asymmetric Positioning to Reduce Strain
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Solution Overview
Problem
Liquid crystal display devices experience strain and display unevenness due to the positioning of the fixing parts where the holder and exterior panel are screwed and clamped, leading to issues when displaying a black screen.
Innovation Solution
The liquid crystal display device incorporates a fixing part that secures the holder and exterior panel at an angle of 45° relative to the light-transmission axes of the polarizing plates, reducing stress-induced photoelastic effects and preventing display unevenness by ensuring the holder and exterior panel are fixed without misalignment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the holder and exterior panel are screwed and clamped at conventional positions, then the structure is simple and easy to manufacture, but strain occurs in the liquid-crystal panel causing display unevenness
Solution Approach 1:
The patent applies asymmetry by positioning the fixing part at a specific asymmetric location where the straight line connecting screw holes intersects the holder periphery at an angle different from the light-transmission-axis direction of the polarizing plate. This asymmetric positioning prevents strain-induced display unevenness while maintaining structural simplicity
Solution Approach 2:
The patent applies local quality by specifically designing the fixing part geometry and positioning it at a critical location on the holder where the straight line of screw holes forms a specific angle with the holder periphery. This localized design ensures that strain does not propagate to the liquid-crystal panel in a way that causes display unevenness
2Stability of the object's composition
If the holder and exterior panel are tightly clamped to ensure structural stability, then the assembly rigidity is improved, but strain on the liquid-crystal panel increases causing display unevenness
Solution Approach 1:
The patent applies local quality by designing the fixing part with specific geometric characteristics and positioning it at a location where the straight line connecting screw holes intersects the holder periphery at a specific angle. This localized design allows tight clamping for structural stability while preventing strain propagation to the liquid-crystal panel
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 configuration effectively reduces display unevenness by minimizing stress on the liquid-crystal panel, ensuring that the liquid crystal display module operates without light leakage during a black screen display, thereby maintaining uniformity.
Implementation Method 1
a liquid-crystal display module (301), which includes the liquid-crystal panel (311) and a polarizing plate (321)
Implementation Method 2
reducing stress-induced photoelastic effects and preventing display unevenness
Data Source
AI summary
A liquid crystal display device includes a liquid-crystal display module, a holder, an exterior panel, and a fixing part. The liquid-crystal display module includes the liquid-crystal panel and a polarizing plate. The holder holds a back light that is glued to a back surface of the liquid-crystal display module. The exterior panel surrounds a periphery of the liquid-crystal display module. The fixing part fixes the holder and the exterior panel to each other in a part where a straight line and a periphery portion of the holder intersect with each other, the straight line extending in a direction that is different from a light-transmission-axis direction of the polarizing plate.