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US 6,583,844 B1Granted
Liquid crystal display device
AssigneeHitachi, Ltd.
InventorsYasuyuki Mishima, Shunsuke Morishita
Life of this patent
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Abstract
In spite of an increase in the size of a liquid crystal display panel, it is possible to prevent the defective connection of a flexible wiring board to a transparent substrate of the liquid crystal display panel. A liquid crystal display device includes a pair of transparent substrates arranged to oppose each other across a liquid crystal, for which they are utilized to form a chamber, a plurality of pixels formed along a spreading direction of the liquid crystal, driving circuits for supplying video signals to the pixels, and a flexible wiring board for supplying signals to the input sides of the driving circuits from a substrate on which a control circuit is mounted, the flexible wiring board being divided into a plurality of portions.
Claims16
A liquid crystal display device, comprising:
- a liquid crystal display panel having, a pair of substrates arranged to oppose each other, a liquid crystal layer interposed between the pair of substrates, a plurality of pixels being formed along the liquid crystal layer;
- a plurality of driving circuits for supplying signals to the pixels and being juxtaposed along one of edges of the liquid crystal display panel, the plurality of driving circuits being arranged adjacent one another and divided into a plurality of driving circuits groups having plural driving circuits along the one of the edges of the liquid crystal panel;
- a printed circuit board having a control circuit mounted thereon which controls the plurality of driving circuits;
- and
- a plurality of flexible wiring boards being juxtaposed along a direction in which the plurality of driving circuits are juxtaposed, a respective one of the plurality of flexible wiring boards being provided for a respective one of the plurality of driving circuits groups, each of the plurality of flexible wiring boards having a connecting portion to be connected to the printed circuit board and protruded portions provided in correspondence with respective driving circuits of a respective driving circuits group, the protruded portions being spaced from one another and protruding toward the one of the edges of the liquid crystal display panel and having respective ends mounted on one of the pair of substrates at the one of the edges of the liquid crystal display panel, wherein
- each of the plurality of flexible wiring boards receives a control signal from the control circuit through the connecting portion thereof and inputs the control signal sequentially to respective input sides of the respective driving circuits of the respective one of the driving circuit groups corresponding thereto, and each of the protruded portions thereof having at least one signal path thereof inputting the control signal to the input side of the driving circuits of the respective one of the driving circuits groups.
3 more elements
A liquid crystal display device, comprising:
- a liquid crystal display panel having, a pair of substrates arranged to oppose each other, a liquid crystal layer interposed between the pair of substrates, a plurality of pixels being formed along the liquid crystal layer;
- a plurality of driving circuits for supplying signals to the pixels and being juxtaposed along one of edges of the liquid crystal display panel, the plurality of driving circuits being arranged adjacent one another and divided into a plurality of driving circuits groups having plural driving circuits along the one of the edges of the liquid crystal panel;
- a printed circuit board having a control circuit mounted thereon which controls the plurality of driving circuits;
- and
- a flexible wiring board, which is arranged to extend along a direction in which the plurality of driving circuits are juxtaposed, consisting of a plurality of sections thereof provided in correspondence with the driving circuits groups and arranged in an extension direction thereof, each of the sections having a connecting portion to be connected to the printed circuit board, and having protruded portions thereof protruded toward the one of the edges of the liquid crystal display panel in correspondence with the respective driving circuits belonging to the one of the driving circuit groups and having respective ends mounted on one of the pair of substrates at the one of the edges of the liquid crystal display panel, the protruded portions being spaced from each other at the ends thereof, wherein
- a flexible wiring board receives a control signal from the control circuit through one of the connecting portions of the sections thereof,
- each of the protruded portions corresponds to one of the driving circuits has at least one signal path for the control signal to be connected to an input side of the driving circuit corresponding thereto,
- each region of the flexible wiring board between each pair of the sections which are adjacent to one another along the extension direction thereof is narrower than the rest thereof, and
- the control signal is inputted to each of the plurality of driving circuits sequentially along the one of the edges of the liquid crystal display panel and is transferred through each region between the sections of the flexible wiring board.
6 more elements
Dependencies are inferred from the claim text.