Patent ID: 7218044
Filing Date: 2007-05-15
Classification: H01J

Abstract:
1. A front filter attached to a front surface of a plasma display panel, the front filter comprising: an antireflection coating for preventing reflection of incident light from outside; an optical characteristic film for improving optical characteristics of incident light from the panel; an EMI shielding film for shielding emission of electromagnetic wave; and an NIR blocking film for blocking near infrared rays emitted from the panel, wherein transmittance of emitted light from the plasma display panel when the emitted light traverses the antireflection coating, the optical characteristic film, the EMI shielding film, and the NIR blocking film is determined independent of wavelength of the emitted light, wherein transmittance of blue rays at a wavelength of 454 nm is 50–80%, transmittance of green rays at a wavelength of 525 nm is 40–80%, transmittance of orange rays at a wavelength of 580–592 nm is 5–20%, transmittance of red rays at a wavelength of 610–630 nm is 50–80%, and transmittance of near infrared rays at a wavelength of 850–950 nm is 1–5%, and wherein light transmittance at a wavelength range between the blue rays and the green rays is less than light transmittances of the blue rays and green rays by 1–20%, light transmittance at a wavelength range between the green rays and the red rays is less than light transmittances of the green rays and red rays by 10–50% and light transmittance at a wavelength range between the red rays and the near infrared rays is less than light transmittances of the red rays and near infrared rays by 1–70%.