Hitachi Electronic Devices Co., Ltd.
|Hitachi Electronic Devices Co., Ltd. Patent applications|
|Patent application number||Title||Published|
|20090207337||Liquid crystal display device - In a liquid crystal display device, a transparent sheet TPS is provided to a surface of a diffusion plate SCT which faces a light source (cold cathode fluorescent lamps CFL). The whole or at least respective portions of four sides forming peripheries of the transparent sheet TPS and the diffusion plate SCT are adhered to each other using a pressure sensitive adhesive double-sided tape or the like thus sealing a gap defined between them in a complete state or in an incomplete state with respect to outside air so that the drying conditions at a liquid-crystal-display element side and a light-source side of the diffusing plate SCT become equal.||08-20-2009|
|20090174644||Liquid crystal display device having an improved backlight - A liquid crystal display device includes a liquid crystal display panel having a liquid crystal layer sandwiched between a pair of transparent substrates, at least one of which has patterned electrodes on an inner surface thereof, and a backlight disposed behind the liquid crystal display panel. The backlight has at least one discharge tube including a sealed-off transparent tube, a phosphor film formed on an inner surface of the sealed-off transparent tube, and a discharge gas within the sealed-off transparent tube and plural electrodes spaced in a direction of an axis of the sealed-off transparent tube and positioned at least partially around a circumference of the sealed-off transparent tube. At least two adjacent ones of the plural electrodes is supplied with alternating voltages different in frequency from each other, respectively.||07-09-2009|
|20090122231||Liquid crystal display device - Light-emitting elements can be accurately directly opposed to the entrance surface of a light guide at an accurate distance therefrom, and can be mounted on a single side of a printed circuit board together with other electronic components, whereby the number of manufacturing steps and the thickness of a liquid crystal display device can be reduced. The light guide and the printed circuit board are disposed on the back surface of the liquid crystal display panel, and the respective light-emitting elements are inserted through through-holes formed to extend through the printed circuit board, with the light-emitting portions of the respective light-emitting elements opposed to the entrance surface of the light guide. The light-emitting elements, together with the other electronic components, are mounted on the printed circuit board from one side. Electrodes of the light-emitting elements are bridged and secured to a mounting surface of the printed circuit board.||05-14-2009|
Patent applications by Hitachi Electronic Devices Co., Ltd.