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Filter of display device

A technology for display devices and optical filters, which is applied in the field of optical filters and can solve problems such as complex preparation methods

Inactive Publication Date: 2009-09-23
LG CHEM LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the film in the prior art has a problem in that its preparation method is complicated

Method used

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  • Filter of display device
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  • Filter of display device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0124] The effect of increasing the contrast according to the change of the critical angle

[0125] The contrast-enhancing effects expected in the preparation of optical filters for display devices were compared and calculated according to the conditions listed in Table 1 below. The light transmittance of the film used for the filter was set to have a light transmittance level of 90%, and the light transmittances of the front / rear stripe patterns thereof were both set to a light transmittance level of 0%. And, the front opening ratio, thickness and refractive index (R i ) were set to 70%, 75 μm and 1.6, respectively. For PDP display devices, set the brightness of white light and black light to 575.3cd / m 2 and 0.9cd / m 2 The brightness level of the PDP panel is set to 200lx by lighting, and the reflectance of the PDP panel is set to 29%. In order to determine the effect of the optical filter used for the display device in the use environment or an environment similar to th...

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Abstract

There is provided a filter of a display device capable of ensure a contrast ratio equal to or more than a predetermined value in various viewing angles. The filter of a display device includes a transparent film; and a plurality of stripe patterns formed parallel to both surfaces of the transparent film, wherein a width (a) of the stripe patterns and a thickness (t) of the transparent film are adjusted to a critical angle (Theta c) of 20 to 50 DEG .

Description

technical field [0001] The present invention relates to an optical filter for a display device, more specifically, to an optical filter for a display device capable of ensuring that the contrast ratio is equal to or greater than a predetermined value under different viewing angles. Background technique [0002] The PDP display device displays images by inducing gas discharge between electrodes and exciting phosphors in desired pixels by ultraviolet emission formed by the gas discharge. [0003] Due to the above characteristics of the PDP device, it emits various electromagnetic waves and near infrared rays. However, electromagnetic waves and near-infrared rays are harmful to the human body and also cause problems of misoperation of other electronic devices around, so a filter is attached to the surface of the PDP device to cut off the electromagnetic waves and near-infrared rays. The filter includes an electromagnetic wave shielding film or a near-infrared shielding film to...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B5/20
CPCG02B27/0018H01J11/44H01J11/10H01J2211/444G02B2207/123G02F1/133509G02B5/20
Inventor 李渊槿崔玹硕金正斗朴相炫李修林
Owner LG CHEM LTD