Hitachi Displays, Ltd.

Nobuyuki Mitsuhashi

Takeshi Harayama

Shiro Ueda

Fumitoshi Matsuda

Tetsuya Enomono

A liquid-crystal display device includes a liquid-crystal display panel having a liquid-crystal layer sandwiched between a pair of substrates, and a backlight unit provided on a surface opposite to a display surface of the liquid-crystal display panel. The backlight unit has an accommodator capable of having at least one optical sheet arranged therein and having a sidewall having a projection at a periphery thereof. The optical sheet has a hole into which the projection is inserted, the hole formed in the optical sheet having a form that is the same as the top plan form of the tip of the projection, the hole being formed in the optical sheet so that a certain rotation angle is established between the form of the hole and a top plan form of the tip of the projection in a state in which the optical sheet is accommodated in the accommodator.

Liquid-crystal display device

In a liquid crystal display device, a reduction in thickness with high luminance is achieved by laterally arranging two cold cathode fluorescent tubes in parallel to a main surface of the light guide plate along one side thereof and, at the same time, mutual interference in the pull-around disposition of power supply cables is eliminated. One of the cold cathode fluorescent tubes has a high-voltage-side electrode terminal thereof connected with one end of a high-voltage-side cable and a low-voltage-side electrode terminal thereof connected with one end of a flat cable. The flat cable has a mid-portion thereof bent at 90 degrees, and it traverses a lamp reflection plate, is further twisted at 90 degrees in the longitudinal direction, is further bent at 90 degrees and is merged with a pull-around path of the high-voltage-side cables.

Liquid crystal display device with plural linear light sources having different lengths

Optical sheets can be fixed easily and positively in a liquid-crystal display device having a liquid-crystal display panel in which a liquid-crystal layer sandwiched between a pair of substrates and a lighting unit provided on a surface opposite to a display surface of the liquid-crystal display panel. For this purpose, a projection is provided on a sidewall of an accommodator, and the projection is inserted into a hole provided in optical sheets arranged within the accommodator, thereby fixing the optical sheets in the accommodator. The length along a certain straight line of a top plan form of a tip of the projection is longer than the length along the certain straight line of the hole formed in the optical sheets, thus preventing the optical sheets from falling out of the accommodator.

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Chiba, Japan

Nobuyuki Mitsuhashi