Liquid Crystal Display Conductive Back Frame and Polarizer
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Solution Overview
Problem
The issue of 'howling' in liquid crystal display devices, where users hear a croaking sound when their ears are close to the screen, due to mechanical vibrations caused by alternating voltage exposure, affects user experience.
Innovation Solution
A liquid crystal display device design that includes a conductive back frame and a first polarizer with a conductive structure layer, where the conductive component electrically connects the first polarizer and the conductive back frame, maintaining a constant potential difference to prevent capacitance formation and reduce mechanical vibrations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the display panel uses a conventional structure without additional conductive connections, then the device complexity is low, but mechanical vibrations are amplified causing howling sounds
Solution Approach 1:
The patent introduces a conductive component as an intermediary element that electrically connects the conductive back frame to the conductive structure layer in the first polarizer. This intermediary connection prevents capacitance formation between the back frame and display panel, thereby eliminating the harmful mechanical vibrations that cause howling sounds while maintaining a relatively simple overall device structure.
Solution Approach 2:
The patent establishes an electrical equipotential connection between the conductive back frame and the conductive structure layer through the conductive component. By maintaining a constant potential difference of zero between these components, the system prevents the formation of capacitance and the associated mechanical vibrations, effectively resolving the howling issue without significantly increasing device complexity.
2Reliability
If the first polarizer includes a conductive structure layer, then the potential difference is maintained constant to prevent capacitance, but the manufacturing complexity increases
Solution Approach 1:
The patent merges the conductive function with the existing first polarizer structure by incorporating a conductive structure layer into the polarizer. This integration allows the first polarizer to serve dual functions: polarization and electrical potential stabilization. The conductive component connects this integrated structure to the back frame, ensuring potential stability while the manufacturing process remains extended through standardized layer stacking techniques.
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 design effectively reduces or eliminates the 'howling' sound by preventing the amplification of mechanical vibrations, enhancing user experience by minimizing noise interference.
Implementation Method 1
a conductive component electrically connected to the conductive back frame and the conductive structure layer
Implementation Method 2
the light-transmitting conductive layer includes a first branch, a second branch, and a trunk portion
Data Source
AI summary
An embodiment of the application discloses a liquid crystal display device. In the liquid crystal display device, the backlight module includes a backlight module including a conductive back frame; a display panel including a liquid crystal cell and a first polarizer, wherein the first polarizer is disposed on a side of the liquid crystal cell facing the backlight module, and the first polarizer includes a conductive structure layer, a first base layer, and a polarizing layer disposed on the backlight module in sequence; and a conductive component electrically connected to the conductive back frame and the conductive structure layer.