Abstract: A liquid crystal display panel device has a backlight unit for illuminating the reverse surface of a liquid crystal display panel, and the backlight unit includes a diffusion plate, a diffusion sheet adhered to one of the major surfaces of the diffusion plate, a lamp house and a moisture-proof sheet inserted between the other surface of the diffusion plate and the lamp house; the moisture-proof sheet prevents the diffusion plate from vaporization of water contained in the diffusion plate, and the diffusion plate is not warped; the diffusion plate maintains the initial shape immediately after the assemblage into the backlight unit so that the liquid crystal display panel is continuously uniformly illuminated by the backlight unit.

Abstract: A diffuser plate utilized in a backlight module, wherein the diffuser plate comprises a glass plate adopted as the base, and a diffusive material utilized in a diffusion-treatment. The preferred embodiments of the present invention include coating diffusive particles on the surface of the glass substrate, embedding diffusive particles into the glass substrate, and gluing a diffusive sheet onto the surface of the glass substrate or the diffusive sheet's covering the surface of the glass substrate, all of which can form a diffuser plate with a superior distortion-resistance, heat-resistance, and humidity-resistance.

Abstract: An edge-type backlight module positioned under a display panel includes a light guide plate, a lampshade, and a lamp. The lamp including a curved part is installed inside the lampshade for emitting light to one side of the light guide plate.

Abstract: A taper 31 is formed in a holding wall 15 in a holding frame 11 for holding the periphery of a flat display panel 2 such as a liquid crystal panel so as to be apart from the display panel 2 from the lower side of the boundary face between substrates 4 and 5 to the upper end. On the substrate 4 side lower than the boundary of the substrates 4 and 5, a holding face 15a which comes into contact with only the end face of the lower substrate 4 is provided.

Abstract: A liquid crystal display panel device has a backlight unit for illuminating the reverse surface of a liquid crystal display panel, and the backlight unit includes a diffusion plate, a diffusion sheet adhered to one of the major surfaces of the diffusion plate, a lamp house and a moisture-proof sheet inserted between the other surface of the diffusion plate and the lamp house; the moisture-proof sheet prevents the diffusion plate from vaporization of water contained in the diffusion plate, and the diffusion plate is not warped; the diffusion plate maintains the initial shape immediately after the assemblage into the backlight unit so that the liquid crystal display panel is continuously uniformly illuminated by the backlight unit.

Abstract: An optical guide plate serves as a surface illuminant in a liquid crystal display, and includes a transparent optical guide body shaped in a trapezoidal prism, a line light source radiating light toward the bottom surface serving as an incident surface and a reflecting sheet opposed to a granulated diffusion surface extending between the incident surface and a top surface and opposed to a light output surface, wherein micro projections are formed on the granulated diffusion surface so as to form an air layer between the granulated diffusion surface and the reflection sheet without any direct contact between the granulated diffusion surface and the reflection sheet, thereby permitting the incident light to be propagated through the air layer.