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Display device and lc panel protection method

A display and liquid crystal panel technology, applied in the direction of instruments, optics, optical components, etc., can solve the problems of ultraviolet damage and insufficient performance of materials

Active Publication Date: 2016-03-16
3M INNOVATIVE PROPERTIES CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Materials used with continuous exposure to direct sunlight often experience UV damage and subsequent inadequate performance

Method used

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  • Display device and lc panel protection method
  • Display device and lc panel protection method
  • Display device and lc panel protection method

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Embodiment Construction

[0014] LC panels used outdoors risk performance and lifetime damage due to the large amount of heat absorbed by the panel from incident light. The part of the visible spectrum where most of the heat is generated on LC panels is from about 400 nm to about 850 nm. Unfortunately, a large amount of light in this wavelength range is visible light. Therefore, completely blocking light from this part of the spectrum will result in no image being seen from any angle on the LC panel. The present invention attempts to achieve a solution to the thermal problems of LC panels by providing a film on the LC panel that blocks a significant amount of damaging light at off-axis angles, e.g., 60 degrees, and allows more light transmission at normal incidence Rate. The film also attempts to block at least part of the damaging light in the visible and infrared spectrum at normal incidence, thereby maximizing thermal control on the panel while allowing on-axis visibility.

[0015] One example cu...

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Abstract

The present invention relates to a display device using a multilayer film (104) whose (104) reflects (red) light having a wavelength between about 600 nm and about 800 nm at an angle of incidence (114) of 60 degrees to Protects the liquid crystal panel (102) from light and sunlight damage. The film (104) transmits light in the visible band having a wavelength between about 420 nm and 650 nm at normal incidence (116). The outermost surface (106) of the membrane (104) may be a hardcoat (124). A metal oxide layer (120) and a metal layer (130) may be included to reflect infrared light having a wavelength greater than about 850 nm.

Description

technical field [0001] The present invention relates to display devices. The invention also relates to methods of protecting LC panels from heat and sunlight. Background technique [0002] Liquid crystal display panels have quickly become one of the most popular types of panels used in a variety of displays including cell phones, PDAs (personal digital assistants), computer monitors, notebook monitors, televisions and advertising displays, among others. In many cases, it is desirable to use the LC display panel outdoors under sunlight. However, unprotected exposure of the LC display panel to sunlight creates a serious risk of thermal overloading of the panel and greatly shortening the lifetime of the display. [0003] In an effort to reduce thermal damage to LC display panels, infrared blocking films have been applied to the LC panels. However, LCD panels mainly absorb the spectrum in the 400nm to 850nm region, with lower absorption at longer wavelengths. Thus, the infra...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02F1/13
CPCG02B1/04G02F1/133308G02F2203/02G02F2203/055G02F2203/11G02F2201/083G02F1/133331G02F1/133553
Inventor 迈克尔·F·韦伯刘宇锋
Owner 3M INNOVATIVE PROPERTIES CO