Elastic Sealing Ring for LCD Camera Hole Light Leakage
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Solution Overview
Problem
Conventional LCD devices with high screen ratios face challenges in minimizing frame sizes and preventing light leakage around camera areas, which affects the camera's functionality and visual experience due to gaps between the backlight module and LCD panel during assembly.
Innovation Solution
Incorporation of an elastic light-blocking element, such as a black silicon rubber ring, around the camera hole to securely couple the LCD panel and backlight module, preventing light leakage by filling gaps and ensuring a tight fit, while maintaining camera transparency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the frame size is reduced to increase screen ratio, then the visual experience is improved, but the assembly precision requirement increases and light leakage risk increases
Solution Approach 1:
The patent employs a flexible sealing ring made of elastic material that can deform to fill gaps between the LCD panel and backlight module. This flexible component compensates for assembly tolerances and prevents light leakage without requiring extremely tight assembly precision, thus resolving the contradiction between reduced frame size and manufacturing precision requirements.
Solution Approach 2:
The sealing ring acts as an intermediary element between the LCD panel and backlight module. It provides a light-blocking function while accommodating assembly variations, serving as a mediator that prevents light leakage without demanding ultra-precise assembly, thereby addressing the contradiction between screen ratio improvement and manufacturing precision.
2Area of stationary object
If the frame size is reduced to increase screen ratio, then the visual experience is improved, but light leakage around camera area increases
Solution Approach 1:
The flexible sealing ring made of elastic material conformally fits around the camera hole and fills gaps between components. This flexible structure effectively blocks light leakage paths that would otherwise occur due to reduced frame sizes, thus resolving the contradiction between increased screen ratio and prevention of light leakage.
Solution Approach 2:
The sealing ring provides localized light-blocking quality specifically around the camera hole area where light leakage is most problematic. By concentrating the light-blocking function at the critical location rather than requiring uniform precision across the entire reduced frame, the patent resolves the contradiction between screen ratio and light leakage prevention.
3Object-generated harmful factors
If gaps between backlight module and LCD panel are reduced, then light leakage is prevented, but assembly complexity increases
Solution Approach 1:
The sealing ring serves as a simple intermediary component that fills gaps between the backlight module and LCD panel. Rather than requiring complex assembly procedures or multiple components to achieve gap filling, this single elastic ring provides an straightforward solution that prevents light leakage without significantly increasing assembly complexity.
Solution Approach 2:
The elastic sealing ring automatically deforms to fill gaps between components during assembly, providing self-adjusting gap filling without requiring precise positioning or complex assembly tools. This self-service characteristic prevents light leakage while maintaining simple assembly procedures, resolving the contradiction between light leakage prevention and assembly complexity.
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
The solution effectively reduces light leakage and enhances the assembly stability of the LCD device, maintaining camera functionality and improving the visual experience by ensuring a secure and light-tight connection between the LCD panel and backlight module.
Implementation Method 1
an elastic light-blocking element, such as a black silicon rubber ring, around the camera hole to securely couple the LCD panel and backlight module, preventing light leakage by filling gaps
Data Source
AI summary
An LCD device with camera module includes a backlight module and an LCD panel. The LCD panel includes a color filter substrate, a thin film transistor (TFT) substrate, a liquid crystal layer between the color filter substrate and the TFT substrate, and a lower polarizer on a side of the TFT substrate away from the liquid crystal layer, the lower polarizer is adjacent to the backlight module. The backlight module defines a hole for the camera module. The hole extends through the lower polarizer. The hole includes a bottom wall and a sidewall coupling to the bottom wall. The bottom wall is defined and formed by the TFT substrate. An elastic element in a coupling region of the bottom wall and the sidewall blocks leakage of light from the backlight module.