Hitachi Displays, Ltd.

Panasonic Liquid Crystal Display Co., Ltd.

Japan Display Inc.

Hitachi Displays Devices, Ltd.

Hitachi, Ltd.

Hitachi Electronic Devices Co., Ltd.

Akio Tezuka

Takayuki Ota

Masafumi Nagaoka

Kazuyoshi Tanaka

Hisao Hirayama

Fumiyuki Sato

Yasuhisa Shiraishi

Nobuyuki Koganezawa

Hironobu Isami

Yoshio Toriyama

Saburo Watanabe

Masataka Natori

Toshitsugu Miyawaki

Shinji Shimizu

Makoto Hasegawa

Tomoaki Kawada

Liquid crystal display device preventing brightness reduction of a backlight even when a recess is formed in a lower frame accommodating the backlight and a light-emitting diode substrate mounted with a light-emitting diode is accommodated in the recess. A backlight includes a reflection member arranged on the back side of a light guide plate, and the light-emitting diode irradiating the light guide plate with illumination light from a side portion of the light guide plate. The recess protruding on the back side is formed in the lower frame for accommodating and arranging the light-emitting diode substrate mounted with the light-emitting diode therein. A part of an end portion of the reflection member protrudes into a space formed by the recess toward the light emitting diode. A holding member is arranged between the reflection member and the lower frame at least to hold the protruding region of the reflection member.

Liquid crystal display device

This invention provides a liquid crystal display device that makes it possible to ground the conductive film provided on the display side of the liquid crystal display panel without fail while making the frame narrower. The device has a liquid crystal display panel where a liquid crystal layer is provided between two facing substrates; a mold frame for holding the liquid crystal display panel in a predetermined position; a lower frame made of a metal for containing the mold frame; and first and second conductive members, and characterized in that a conductive film is formed on the display side of the liquid crystal display panel, the first conductive member is provided so as to make contact with the conductive film and an upper surface of the mold frame, and the second conductive member is provided so as to make contact with the first conductive member and the lower frame.

Liquid crystal display device having first and second conductive members

A display device includes a display panel unit and a backlight unit which radiates light toward the display panel. The display panel unit includes a display panel on an upper surface of a box-shaped panel housing which has first projecting portions on side walls of the housing. The backlight unit incorporates a light source in a bottom portion of a box-shaped light source housing which has second projecting portions on side walls of the light source housing. By bringing the first projecting portions and second projecting portions into contact with each other, a distance between the light source of the backlight unit and the display panel can be held. Further, by forming third projecting portions which project further than the first projecting portions on the panel housing, handling of the display panel unit is facilitated.

Display device

A liquid crystal display device includes: a liquid crystal display panel; and a backlight disposed to face the liquid crystal display panel, the backlight including at least a frame having a bottom surface facing the liquid crystal display panel, a reflector placed on the bottom surface of the frame, and a plurality of light sources disposed on the liquid crystal display panel side of the reflector and supported by the frame, wherein a recess protruding in the opposite direction to the liquid crystal display panel is formed in the bottom surface of the frame, the recess and the reflector constituting an air duct.

A liquid crystal display device includes a liquid crystal display panel and a backlight arranged on a back surface of the liquid crystal display panel, the backlight including a plurality of rod-shaped light sources, a frame which supports the rod-shaped light sources, and a heat radiation plate which is arranged on an inner surface of the frame. Through holes are formed in the frame, and heat radiation fins are formed on the heat radiation plate in a state that the heat radiation fins project toward a back surface of the liquid crystal display panel through the through holes formed in the frame. Due to such a constitution, it is possible to provide a liquid crystal display device which can enhance heat radiation efficiency.

A liquid crystal display device includes a liquid crystal display panel and a backlight disposed at the back of the liquid crystal display panel. The backlight includes a frame, a light source, a reflective sheet, and a heat dissipating plate formed in a rectangular shape and housing the light source, the reflective sheet, and the heat dissipating plate. The heat dissipating plate is disposed between the reflective sheet and a bottom surface of the frame and includes a first portion and a second portion facing the first portion, and has a plurality of first openings at the first portion and at least one second opening at the second portion. The plurality of first openings are formed along the first portion, and each of the first openings has a first edge and a first fin formed at a part of the first edge.

A liquid crystal display device includes a liquid crystal display panel and a backlight disposed at a rear surface of the liquid crystal display panel. The backlight includes a light source, a frame housing the light source, a heat dissipating plate disposed inside the frame, and a reflective sheet disposed at a surface of the heat dissipating plate on the liquid crystal display panel side. The heat dissipating plate is formed with a heat dissipating fin protruding to a surface of the frame on the side opposite to the liquid crystal display panel through an opening formed through the frame in a portion corresponding to the upper portion thereof and formed with an opening which is closed with the frame and the reflective sheet in a portion corresponding to the lower portion thereof.

A liquid crystal display device has a liquid crystal display panel and a backlight. The backlight includes plural line light sources arranged in parallel with each other, a transparent optical plate disposed on a liquid-crystal-display-panel side of the line light sources, plural minute optical controlling elements formed on a liquid-crystal-display-panel-side surface of the transparent optical plate. The plural minute optical controlling elements extend in parallel with the line light sources, and are symmetrical in a cross section perpendicular to longitudinal axes of the plural line sources, between two adjacent midplanes each of which passes midway between two adjacent ones of the plural line light sources and each of which is perpendicular to the transparent optical plate.

A display device suitable for a game machine has dot printed films which are printed on a light guide plate which constitutes a backlight for illuminating a liquid crystal display panel. The dots of the dot printed films are arranged more densely in a window-frame portion corresponding region, which faces a display region of the liquid crystal display panel, and in the vicinity of an inner periphery of a transmission portion corresponding to a region which faces a transmission region.

Liquid crystal display backlight's light reflection treatment portion that directs light from the light source toward the LCD excluding a transmission region of the LC

In a liquid crystal display device having the so-called side-edge type backlight system which comprises: a liquid crystal display panel; a light guide plate being disposed opposite to a main surface of the liquid crystal panel; and a linear lamp being disposed along one of sides of the light guide plate, the present invention provides a plurality of grooves at a corner area of an edge of the light guide plate along which the linear lamp is disposed so that the plurality of grooves are extended in a direction slanted to the edge of the light guide plate. In accordance with this structural feature, the present invention enables a high quality image display performance of the liquid crystal display panel by suppressing the display irregularity appearing therein effectively.

Growing community of inventors

Mobara, Japan

Akio Tezuka