EP0556822A2
Expired / Lapsed
EP
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Reflective type liquid crystal display
Assignee: Hitachi Ltd
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Filing: 1993-02-18
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Granted: —
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Expires: 2013-02-18
Abstract
Abstract An active matrix reflective type liquid crystal display is provided which is obtained by an easy alignment of the respective layers of the display, and the use of small TFTs (thin film transistors) and a reduced number of manufacturing steps. Each TFT comprises a drain electrode which comprises an area where a scanning conductor which will be the gate electrode (1), and a signal conductor which will be the drain electrode (2), concerned intersect, a source electrode which comprises an area where a short-circuiting conductor which will be the source electrode (3), concerned parallel to the signal conductor (2) and the associated scanning conductor (1) concerned intersect, a gate electrode which comprises an area provided between the drain and source electrodes concerned on the scanning conductor (1) and a reflective electrode (10) concerned provided at an end of the short-circuiting conductor (3) concerned.
Inventors
- 👤 Masaru Takabatake
- 👤 Yuji Mori
- 👤 Yoshiharu Nagae
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-10 02:32
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G02F1/136; G02F1/1362; G02F1/1368; H; H10; H10D; H10D30/00; H10D30/60; H10D30/67; H10D30/6704; H10D30/6723; H10D30/6729; H10D30/673; H10D30/6732; H10D30/674; H10D30/6741; H10D30/6743; H10D30/6746
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
135 words
A reflective type liquid crystal display including a plurality of scanning conductors (1), a plurality of signal conductors (2) and a plurality of thin film transistors and reflective pixel electrodes provided in the vicinity of areas where the plurality of scanning conductors (1) and the plurality of signal conductors (2) intersect, comprising: the thin film transistors having a reversely staggered structure where each transistor has a drain electrode comprising an area where a scanning conductor concerned and a signal conductor concerned intersect, a source electrode comprising an area where a short-circuiting conductor (3) concerned parallel to the signal conductor and the scanning conductor (1) intersect, a gate electrode comprising a region formed between the drain and source electrodes on the scanning conductor and a reflective electrode (10) provided at an end of the short-circuiting conductor.
Claim 2
Dependent Claim
44 words
A reflective type liquid crystal display according to claim 1, further comprising a plurality of storage capacitance electrodes (6) and an insulating layer provided between a respective one of storage capacitance electrodes (6) and a reflective electrode (10) concerned to form a storage capacitance.
Claim 3
Dependent Claim
40 words
A reflective type liquid crystal display according to claim 1, wherein the length of the short-circuiting conductors (3) in the direction of extension of the plurality of signal conductors (2) is larger than the width of the scanning conductors (1).
Claim 4
Dependent Claim
37 words
A reflective type liquid crystal display according to claim 3, wherein the short-circuiting conductor (3) protrudes from the area where the scanning conductor (1) concerned and the short-circuiting conductor (3) intersect in the direction of the intersection.
Claim 5
Dependent Claim
36 words
A reflective type liquid crystal display according to claim 3, wherein the short-circuiting conductors (3) each take substantially the form of L which includes sections parallel to the signal conductors (2) and the scanning conductors (1).
Claim 6
Dependent Claim
27 words
A reflective type liquid crystal display according to claim 1, wherein at least part of the reflective electrode (10) is formed on an organic passivation film (9).
Claim 7
Dependent Claim
54 words
A reflective type liquid crystal display according to claim 1, wherein a reflective electrode (10) and a scanning conductor (1) on which a thin film transistor which controls the reflective electrode (10) is formed hold an insulating layer between the reflective electrode (10) and an adjacent scanning conductor (1) to form a storage capacitance.
Claim 8
Dependent Claim
31 words
A reflective type liquid crystal display according to claim 1, wherein a short-circuiting conductor (3) and a corresponding reflective electrode (10) are made integrally with each other by the same material.
Claim 9
Independent Claim
107 words
A method of making a reflective type liquid crystal display with a plurality of scanning conductors (1), a plurality of signal conductors (2), a plurality of thin film transistors, a plurality of reflective pixel electrodes (10) and a plurality of storage capacitances (Cstg) provided in the vicinity of areas where the corresponding plurality of scanning conductors (1) and the corresponding plurality of signal conductors (2) intersect, the method comprising the steps of: (a) forming the scanning conductors (1); (b) forming the signal conductors (2) and a plurality of short-circuiting conductors (3) which is parallel to the signal conductors (2) and which intersect with the scanning conductors (1).
Claim 10
Dependent Claim
30 words
A method according to claim 9, wherein the scanning conductor forming step (a) comprises simultaneous formation of storage capacitance electrodes (Stg) which each constitute a part of the storage capacitance.
Claim 11
Dependent Claim
22 words
A method according to claim 9, comprising the steps of: forming a plurality of reflective electrodes (10) concerned after the step (b).
References Cited (Backward Citations)
No citation records indexed.
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