Display device with a thin film transistor and storage condenser
First Claim
1. A display device comprising a first substrate provided with an array of drive switching elements, said array including a plurality of gate lines mutually separated and mutually insulated, an insulating layer formed on said gate lines, semi-conductor layers formed on said insulating layer, a plurality of drains constituting display segments and each overlying at least one said gate line with at least said insulating layer being positioned therebetween, and a plurality of source lines positioned to cross said gate lines and each connected through at least one semiconductor layer to at least one drain, and another substrate mounted in opposition to said array on said first substrate having a counter electrode whereby display by an electro-optical change generated between said two substrates may be performed, and wherein each said semi-conductor layer is of a smaller area than that of one of said drains, and each of said gate lines has substantially the same width as that of an overlying drain, each said gate line and one overlying drain thereby constituting a condenser.
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Accused Products
Abstract
In an image display device an electrode of a storage condenser is composed of a drain electrode while the other electrode of said condenser is composed of a gate line of substantially the same width as that of said drain electrode and is provided across an insulating layer or of another conductive layer provided on a substrate across an insulating layer. The drain electrode constituting an electrode of the accumulating condenser may also be so positioned as to bridge two adjacent gate lines provided across an insulating layer and a semiconductor layer thereby forming the storage condenser.
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Citations
21 Claims
- 1. A display device comprising a first substrate provided with an array of drive switching elements, said array including a plurality of gate lines mutually separated and mutually insulated, an insulating layer formed on said gate lines, semi-conductor layers formed on said insulating layer, a plurality of drains constituting display segments and each overlying at least one said gate line with at least said insulating layer being positioned therebetween, and a plurality of source lines positioned to cross said gate lines and each connected through at least one semiconductor layer to at least one drain, and another substrate mounted in opposition to said array on said first substrate having a counter electrode whereby display by an electro-optical change generated between said two substrates may be performed, and wherein each said semi-conductor layer is of a smaller area than that of one of said drains, and each of said gate lines has substantially the same width as that of an overlying drain, each said gate line and one overlying drain thereby constituting a condenser.
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7. A display device comprising a first substrate provided with a drive switching element array, including a plurality of gate lines mutually separated and mutually insulated, a plurality of semi-conductor layers, a first insulating layer interposed between said gate lines and said semi-conductor layers, a plurality of drains constituting display segments each in contact with one of said semi-conductor layers, and a plurality of source lines also insulated from said gate lines by said first insulating layer, positioned to cross said gate lines, and each in contact with at least one semi-conductor layer;
- a conductive film interposed between said first substrate and said drains and opposed to said drains;
a second insulating layer interposed between said conductive film and said gate lines and between said conductive film and said drains; and
a second substrate mounted in opposition to said array on said first substrate and provided with a counter electrode whereby display by an electro-optical change generated between said substrates may be performed, and whereby a capacitance is formed between said conductive film and said drains. - View Dependent Claims (8, 9, 10, 11, 12, 13, 14, 15)
- a conductive film interposed between said first substrate and said drains and opposed to said drains;
- 16. A display device comprising a first substrate provided with a drive switching element array including plural stripe-formed gate lines mutually separated and mutually insulated, an insulating layer and a semi-conductor layer provided in succession on said gate lines, plural source lines formed on said two layers so as to cross said gate lines, and mutually separated plural drains positioned on said semiconductor layer so as to be separated from said source lines and to be positioned to overlie and to bridge two adjacent gate lines, and another substrate mounted in opposition to said array on said first substrate and provided with a counter electrode, whereby display by an electro-optical change generated between two substrates may be performed.
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21. A display device including a first substrate;
- a conductive layer formed on said first substrate;
a first insulating layer formed on said conductive layer;
a drive switching element array provided on said first insulating layer, comprising an array of thin film transistors including a plurality of gate lines mutually separated and mutually insulated, a second insulating layer formed on said gate lines, a plurality of semi-conductor layers each constituting a portion of one of said thin film transistors, being made of amorphous silicon, and being formed on said second insulating layer, a plurality of drains constituting display segments also formed on said second insulating layer, and a plurality of source lines formed on said second insulating layer positioned to cross said gate lines and each connected through at least one semi-conductor layer to at least one drain; and
a second substrate mounted in opposition to said array on said first substrate and provided with a counter electrode whereby display by an electro-optical change generated between said substrates may be performed.
- a conductive layer formed on said first substrate;
Specification
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- Resources
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Current AssigneeCanon Kabushiki Kaisha (Canon Inc.)
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Original AssigneeCanon Kabushiki Kaisha (Canon Inc.)
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InventorsOkubo, Yukitoshi
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Primary Examiner(s)Corbin, John K.
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Assistant Examiner(s)Lewis, David
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Application NumberUS06/182,089Time in Patent Office1,265 DaysField of Search350/334, 350/331, 350/333, 350/336, 350/339 R, 340/765, 340/784, 357/23 C, 357/23 TF, 357/31, 357/41, 357/45, 357/49, 357/2US Class Current349/42CPC Class CodesG02F 1/136213 Storage capacitors associat...G02F 1/1368 in which the switching elem...
