In-plane switching mode liquid crystal display device
First Claim
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1. An in-plane switching mode liquid crystal display device comprising:
- first and second substrates;
a plurality of gate and data bus lines defining pixel regions and arranged on said first substrate;
a common line formed with said gate bus line;
a plurality of thin film transistors formed at respective crossing areas of said gate and data bus lines, gate electrodes of said transistors being connected to said gate bus lines, respectively;
a gate insulator having a contact hole on said gate electrodes;
a transparent first metal layer including a plurality of first electrodes on said gate insulator;
a passivation layer having a contact hole on said transparent first metal layer; and
a transparent second metal layer including a plurality of second electrodes on said passivation layer, said second electrodes producing plane electric fields together with said first electrodes.
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Abstract
An in-plane switching mode liquid crystal display device includes first and second substrates and a plurality of gate and data bus lines defining pixel regions and arranged perpendicularly and/or horizontally on the first substrate. A common line is formed with the gate bus line, and a plurality of thin film transistors are formed at respective crossing areas of the gate and data bus lines. A plurality of gate electrodes are connected to the gate bus lines, and a gate insulator having a contact hole on the gate electrodes. A transparent first metal layer including a plurality of first electrodes is on the gate insulator. A passivation layer having a contact hole is on the first metal layer. A transparent second metal layer including a plurality of second electrodes is on the passivation layer. A black matrix for preventing light from leaking around the thin film transistor, the gate bus line, and data bus line is on the second substrate. A color filter layer is on the second substrate, and a liquid crystal layer is between the first and second substrates.
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Citations
41 Claims
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1. An in-plane switching mode liquid crystal display device comprising:
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first and second substrates;
a plurality of gate and data bus lines defining pixel regions and arranged on said first substrate;
a common line formed with said gate bus line;
a plurality of thin film transistors formed at respective crossing areas of said gate and data bus lines, gate electrodes of said transistors being connected to said gate bus lines, respectively;
a gate insulator having a contact hole on said gate electrodes;
a transparent first metal layer including a plurality of first electrodes on said gate insulator;
a passivation layer having a contact hole on said transparent first metal layer; and
a transparent second metal layer including a plurality of second electrodes on said passivation layer, said second electrodes producing plane electric fields together with said first electrodes. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 36, 37)
a black matrix for preventing light from leaking around said thin film transistor, said gate bus line, and data bus line;
a color filter layer on said second substrate; and
a liquid crystal layer between said first and second substrates.
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10. The in-plane switching mode liquid crystal display device according to claim 9, further comprising an overcoat layer on said color filter layer.
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11. The in-plane switching mode liquid crystal display device according to claim 1, further comprising a second alignment layer on said second substrate.
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12. The in-plane switching mode liquid crystal display device according to claim 11, wherein said second alignment layer includes one of polyimide, polyamide, and photosensitive material.
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13. The in-plane switching mode liquid crystal display device according to claim 12, wherein said photosensitive material is selected from the group consisting of polyvinylcinnamate and polysiloxanecinnamate.
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36. The method according to claim 1, further comprising the steps of:
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forming a black matrix for preventing light from leaking around said thin film transistor, said gate bus line, and data bus line;
forming a color filter layer on said second substrate; and
forming a liquid crystal layer between said first and second substrates.
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37. The method according to claim 36, further comprising the step of forming an overcoat layer on said color filter layer.
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14. An in-plane switching mode liquid crystal display device comprising:
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first and second substrates;
a plurality of gate and data bus lines defining pixel regions and arranged on said first substrate;
a common line formed with said gate bus line;
a plurality of thin film transistors formed at respective crossing areas of said gate and data bus lines, gate electrodes of said transistors being connected to said gate bus lines, respectively;
a gate insulator having a contact hole on said gate electrodes;
a transparent first metal layer including a plurality of first electrodes and a transparent second metal layer including a plurality of second electrodes on said gate insulator, said second electrodes producing plane electric fields together with said first electrodes on said gate insulator; and
a passivation layer on said common line and said thin film transistors. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27)
a black matrix for preventing light from leaking around said thin film transistor, said gate bus line, and data bus line;
a color filter layer on said second substrate; and
a liquid crystal layer between said first and second substrates.
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23. The in-plane switching mode liquid crystal display device according to claim 22, further comprising an overcoat layer on said color filter layer.
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24. The in-plane switching mode liquid crystal display device according to claim 14, further comprising a second alignment layer on said second substrate.
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25. The in-plane switching mode liquid crystal display device according to claim 24, wherein said second alignment layer includes one of polyimide, polyamide, and photosensitive material.
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26. The in-plane switching mode liquid crystal display device according to claim 25, wherein said photosensitive material is selected from the group consisting of polyvinyl cinnamate and polysiloxanecinnamate.
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27. The in-plane switching mode liquid crystal display device according to claim 14, wherein said passivation layer is substantially only on the thin film transistors and the common line.
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28. A method of forming an in-plane switching mode liquid crystal display device, the method comprising the steps of:
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forming first and second substrates;
forming a plurality of gate and data bus lines defining pixel regions and arranged on said first substrate;
forming a common line formed with said gate bus line;
forming a plurality of thin film transistors formed at respective crossing areas of said gate and data bus lines, gate electrodes of said transistors being connected to said gate bus lines, respectively;
forming a gate insulator having a contact hole on said gate electrodes;
forming a transparent first metal layer including a plurality of first electrodes on said gate insulator;
forming passivation layer having a contact hole on said transparent first metal layer; and
forming transparent second metal layer including a plurality of second electrodes on said passivation layer, said second electrodes producing plane electric fields together with said first electrodes. - View Dependent Claims (29, 30, 31, 32, 33, 34, 35, 38, 39, 40)
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41. A method of forming an in-plane switching mode liquid crystal display device, the method comprising the steps of:
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forming first and second substrates;
forming a plurality of gate and data bus lines defining pixel regions and arranged on said first substrate;
forming a common line formed with said gate bus line;
forming a plurality of thin film transistors formed at respective crossing areas of said gate and data bus lines, gate electrodes of said transistors being connected to said gate bus lines, respectively;
forming a gate insulator having a contact hole on said gate electrodes;
forming a transparent first metal layer including a plurality of first electrodes and a transparent second metal layer including a plurality of second electrodes on said gate insulator, said second electrodes producing plane electric fields together with said first electrodes on said gate insulator; and
forming a passivation layer on said common line and said thin film transistors.
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Specification
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Current AssigneeLG Display Co., Ltd.
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Original AssigneeLG Electronics, Inc. (LG Corporation)
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InventorsChoi, Jae Beom, Oh, Young Jin
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Primary Examiner(s)QI, ZHI QIANG
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Application NumberUS09/079,895Time in Patent Office1,201 DaysField of Search349/141US Class Current349/141CPC Class CodesG02F 1/134363 for applying an electric fi...
