Abstract: An illumination device according to an embodiment of the present disclosure includes: a light source section; and a control unit. The light source section includes one or more solid-state light sources. The control unit controls driving of the one or more solid-state light sources to control luminance for a predetermined time after activation of the light source section.

Abstract: The cathode-ray tube according to the present invention has on the inner surface of the funnel section of the body thereof a laminated layer comprising a first layer of black material, a metal backing layer and a second layer of black material. According to the configuration of the cathode-ray tube of the present invention, stray light reflected within the body of the cathode-ray tube is absorbed by the first layer of black material on the inner surface of the funnel, while stray light reflected off the inner surface of the funnel is absorbed by the second layer of black material. This makes it possible to reduce the amount of stray light incident upon the effective screen area of the panel section.

Abstract: The cathode-ray tube according to the present invention has on the inner surface of the funnel section of the body thereof a laminated layer comprising a first layer of black material, a metal backing layer and a second layer of black material.

Abstract: A projection TV set apparatus includes a lens, a mirror sleeve for holding the lens, and a buffer material provided at a connecting portion between the lens and the mirror sleeve and having a smaller modulus of elasticity than the lens. Also, a projection lens assembly for a projection TV set apparatus which is arranged in front of a light source of the projection TV set apparatus includes a mirror sleeve and at least one lens fitted inside the mirror sleeve having projections formed at at least three locations in the radial direction on the outer circumference of the lens to contact a connecting portion of the mirror sleeve.

Abstract: A cathode ray tube apparatus for a projection TV system which improves the color purity of the luminescence in the cathode ray tube, reduces the chromatic aberration by the projection lens, enables the same type of projection lens to be mounted for all of the green, red and blue CRT apparatuses, and enables manufacturing costs to be slashed by such a common use of components. A light-absorbing agent is incorporated into the panel glass so that the transmittance having the light of wavelengths other than the main wavelength of the spectrum of luminescence of the phosphor of the CRT apparatus, is reduced below the transmittance of the light of the main wavelength. By incorporating this agent into the panel glass of a green CRT apparatus the average value of the transmittance of the light of the wavelength in the range of 500 nm to 560 nm becomes higher than the transmittance of the light of the wavelengths outside this range.