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US 6,320,630 B1Granted
Liquid crystal display device having a slim driver chip
AssigneesHitachi, Ltd., Hitachi Device Engineering Co., Ltd.
InventorsYuji Yamashita, Mitsuru Goto, Masanari Saito, Shinji Yasukawa, Akira Ogura, Kentaro Agata
Life of this patent
Estimating the term…
Abstract
A liquid crystal display device in which bump electrodes of a semiconductor chip included in a video signal line driving circuit are disposed over noise-absorbing protective diodes so that the area occupied by the semiconductor chip is decreased to reduce the size of the video signal line driving circuit.
Claims14
A liquid crystal display device comprising:
- a liquid crystal display panel having a plurality of pixels arranged in matrix form;
- and
- a video signal line driving unit for supplying a video signal voltage to each of the pixels,
- the video signal line driving unit including at least one semiconductor chip, the at least one semiconductor chip including:
- a plurality of bump electrodes;
- a plurality of protective diode pairs each including a first diode and a second diode;
- and
- a plurality of interconnect layers disposed to cover an anode region of the first diode and a cathode region of the second diode of each of the protective diode pairs and connected to the anode region of the first diode and the cathode region of the second diode, the plurality of interconnect layers having connection portions for connection to the respective bump electrodes,
- each of the interconnect layers which overlie the anode region of the first diode and the cathode region of the second diode of each of the protective diode pairs having the same shape,
- at least one of the plurality of bump electrodes being disposed over the anode region of the first diode or the cathode region of the second diode of one of the protective diode pairs and being connected to a corresponding one of the connection portions of the interconnect layers over the anode region of the first diode or the cathode region of the second diode of the one of the protective diode pairs.
7 more elements
A liquid crystal display device comprising:
- a liquid crystal display panel having a plurality of pixels arranged in matrix form;
- and
- a video signal line driving unit for supplying a video signal voltage to each of the pixels,
- the video signal line driving unit including at least one semiconductor chip,
- the at least one semiconductor chip including:
- a plurality of bump electrodes;
- a plurality of protective diode pairs each including a first diode and a second diode;
- and
- a plurality of interconnect layers disposed to cover an anode region of the first diode and a cathode region of the second diode of each of the protective diode pairs and connected to the anode region of the first diode and the cathode region of the second diode, the plurality of interconnect layers having connection portions for connection to the respective bump electrodes,
- each of the interconnect layers which overlie the anode region of the first diode and the cathode region of the second diode of each of the protective diode pairs being formed to be wider than the anode region of the first diode and the cathode region of the second diode;
- at least one of the plurality of bump electrodes being disposed over the anode region of the first diode or the cathode region of the second diode of one of the protective diode pairs and being connected to a corresponding one of the connection portions of the interconnect layers over the anode region of the first diode or the cathode region of the second diode of the one of the protective diode pairs.
8 more elements
Dependencies are inferred from the claim text.