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Liquid-crystal-display

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Liquid crystal display

Details

Inventors: Shibata, Kouichi;
Assignee: Kabushiki Kaisha Advanced Display (Kumamoto, JP)
Primary Examiner: Parker; Kenneth
Assistant Examiner: Chung; David
Attorney, Agent or Firm: McDermott, Will & Emery

A liquid crystal display capable of preventing luminescent lines generated at the perimeter edge in the display area and fastening firmly sheets such as diffusion sheets to a resin frame. A lightproof tape is taped to cover the perimeter edge of the diffusion sheet and the upper side of a resin frame to fasten firmly the sheets to the resin frame. The lightproof tape prevents luminescent lines generated at the perimeter edge of the diffusion sheet, or at the perimeter edge of the display area in a liquid crystal display device and also prevents slippage of the diffusion sheet and the sheets. Furthermore, the lightproof tape omits two conventional manufacturing processes of black-frame printing and double-faced tape taping and consequently lowers a production cost because of a simplified process, whereby only the process of taping the lightproof tape is required.

DETAILED DESCRIPTION The present invention was made to solve the above-discussed problems and has an object of providing a liquid crystal display capable of preventing luminescent lines generated at the perimeter edge of the display area in the liquid crystal display device, capable of preventing slippage of the diffusion sheet and other sheets, and capable of being manufactured at a lower cost.
A liquid crystal display according to the invention comprises: a light guide plate that is a thin plate in shape and provided at a lower part of a liquid crystal display device; a light source provided closely adjacent to at least one side surface of the light guide plate; sheets including a plurality of diffusion sheets and lens sheets and provided along the upper surface of the light guide plate; a resin frame for accommodating the light guide plate and the sheets; and a lightproof tape taped on the perimeter edge of the top sheet of the sheets and on the upper side of the resin frame to fasten firmly the sheets and the resin frame together.
It is preferable that the diffusion sheet is provided on the top of the sheets.
It is preferable that the lightproof tape prevents luminescent lines generated at the perimeter edge of the display area of the liquid crystal display and, at the same time, prevents slippage of the sheets.
It is preferable that the lightproof tape is mainly made of polyester.
As described above, in the invention, by taping a lightproof tape on the perimeter edge of the top sheet of the sheets and on the upper side of a resin frame, it becomes possible to fasten firmly the sheets and the resin frame together and to prevent slippage of the sheets.
At the same time, it also becomes possible to prevent luminescent lines generated at the perimeter edge of the display area in the liquid crystal display device.
Furthermore, the method according to the present invention can omit two conventional steps of printing the black-frame and taping the double-faced tape, replacing these two steps with only one step of taping the lightproof tape, and consequently achieves a lower production cost as a result of a simplified manufacturing process

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