Liquid Crystal Display Panel Sealing Against Backlight Dust Intrusion
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Solution Overview
Problem
Foreign materials, such as dust, intrude into the backlight portion of liquid crystal display devices, causing light blockage and resulting in abnormal display states due to gaps between the liquid crystal display panel and the backlight.
Innovation Solution
A liquid crystal display device configuration that includes a liquid crystal display panel, a drive printed circuit board, a backlight, a frame-shaped mold frame, and an insertion member, such as a foamed rubber spacer, which blocks the intrusion path of foreign materials between the panel and the frame, preventing them from reaching the backlight.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If cooling fans are operated to cool the monitor, then cooling effect is achieved, but foreign materials such as dust are sucked into the monitor and intrude between the liquid crystal display panel and backlight
Solution Approach 1:
A partition wall is introduced as an intermediary structure between the cooling fan and the liquid crystal display panel assembly. This partition wall blocks the direct path of air flow that would carry dust particles into the gap between the panel and backlight, while still allowing the cooling fan to operate and provide cooling effect to the monitor.
Solution Approach 2:
The internal space of the monitor is segmented by introducing a partition wall that divides the cooling fan area from the liquid crystal display panel area. This segmentation creates separate zones where dust particles are prevented from migrating from the cooling fan zone to the panel zone through the air flow.
2Length of moving object
If the liquid crystal display panel and backlight are integrally formed to reduce thickness, then the picture frame is narrowed and weight is reduced, but gaps are formed that allow foreign material intrusion
Solution Approach 1:
A partition wall is introduced as a protective intermediary structure that seals the gap between the liquid crystal display panel and backlight assembly. This partition wall prevents foreign materials from intruding through the gap while maintaining the thin-profile design, as it integrates into the existing structure without significantly increasing overall thickness.
3Illumination intensity
If foreign materials intrude into the backlight portion, then light blockage occurs, but the intrusion path exists due to gaps between components
Solution Approach 1:
The partition wall serves as a protective barrier that blocks the intrusion path of foreign materials toward the backlight portion. By sealing the gap between the liquid crystal display panel and backlight assembly, it prevents dust and other contaminants from reaching the backlight, thereby maintaining light transmission and display clarity.
Data Source
AI summary
A liquid crystal display device which prevents the occurrence of an abnormal display on a screen by interrupting the intrusion of a foreign material to a backlight portion arranged inside of a liquid crystal display panel is provided. By adopting the constitution which blocks the intrusion of a foreign material from a gap formed in a liquid crystal display panel by means of a spacer arranged between the liquid crystal display panel and a middle frame, the intrusion of the foreign material to a sheet portion of a backlight can be prevented.