Tablet integrated liquid crystal display apparatus with less parallax

• US 5,995,172 A
• Filed: 01/02/1997
• Issued: 11/30/1999
• Est. Priority Date: 01/02/1997
• Status: Expired due to Term

• Current Assignee: Vista Peak Ventures LLC (Dominion Harbor Enterprises, LLC)
• Original Assignee: NEC Corporation
• Inventors: Hirai, Yoshihiko, Mizobata, Eishi, Ikeda, Naoyasu
• Primary Examiner(s): Sikes, William L.
• Assistant Examiner(s): Duong, Tai V.
• Application Number:
  US08/778,268
• Time in Patent Office: 1,062 Days
• Field of Search: 349/12, 349/158, 349/139, 349/138, 349/155, 349/156, 349/165, 345/104, 345/173, 345/176, 345/179, 345/182, 178/18, 178/19
• US Class Current: 349/12
• CPC Class Codes: G02F 1/133345 Insulating layers G02F1/1335, G02F1/1337, G02F1/135, G02F1/136 take precedence
• CPC Class Codes: G02F 1/13338 Input devices, e.g. touch panels
• CPC Class Codes: G02F 1/13725 based on guest-host interaction G02F1/13762, G02F1/13737, take precedence
• CPC Class Codes: G06F 3/0412 Digitisers structurally integrated in a display
• CPC Class Codes: G06F 3/045 using resistive elements, e.g. a single continuous surface or two parallel surfaces put in contact

Abstract

In a tablet integrated type liquid crystal display apparatus, a first transparent substrate is provided on a view side. The first substrate is a plastic substrate having a thickness equal to or thinner than 0.6 mm, and a counter electrode is formed on the first substrate. A second substrate on which a driving layer composed of switching elements and pixel electrodes respectively connected to the switching elements is formed. The second substrate is a glass substrate having a thickness in a range of 0.6 mm to 1.1 mm. A guest host liquid crystal layer sandwiched by the first substrate and the second substrate such that the guest host liquid crystal is driven by a voltage applied between the counter electrode and the pixel electrode. A tablet electrode layer may be provided between the first substrate and the counter electrode. Alternatively, a tablet electrode layer may be provided on the first substrate on an opposite side of the counter electrode. In this case, a protecting film is provided on the tablet electrode layer. In addition, a tablet electrode layer may be provided between the second substrate and the driving layer such that the tablet electrode layer is isolated from the driving layer.

Claims

1. A tablet integrated type liquid crystal display apparatus comprising:

a first transparent substrate provided on a view side, wherein said first substrate has a thickness equal to or thinner than 0.6 mm, and wherein a counter electrode is formed on said first substrate;

a second substrate on which a driving layer composed of switching elements and pixel electrodes respectively connected to said switching elements is formed;

a guest host liquid crystal layer sandwiched by said first substrate and said second substrate such that said guest host liquid crystal is driven by a voltage applied between said counter electrode and said pixel electrode; and

a tablet electrode layer provided between said first substrate and said counter electrode such that said tablet electrode layer is isolated from said guest host liquid crystal layer.

2. A tablet integrated type liquid crystal display apparatus according to claim 1, wherein said tablet electrode layer is provided between said first substrate and an insulating layer.

3. A tablet integrated type liquid crystal display apparatus according to claim 1, wherein said tablet electrode layer is a tablet device layer and is provided between said first substrate and an insulating layer.

4. A tablet integrated type liquid crystal display apparatus according to claim 1, wherein said tablet electrode layer provided between said first substrate and an insulating layer such that said tablet electrode layer is isolated from said driving layer.

5. A tablet integrated type liquid crystal display apparatus according to claim 1, wherein said pixel electrodes functions as reflecting plates in addition to the driving of said guest host liquid crystal.

6. A tablet integrated type liquid crystal display apparatus according to claim 1, wherein said first substrate is a plastic substrate and said second substrate is a glass substrate having a thickness in a range of 0.6 mm to 1.1 mm.

7. A tablet integrated type liquid crystal display apparatus according to claim 1, wherein said pixel electrodes are formed on an insulating layer and are connected to thin film transistors via a through hole.

8. A tablet integrated type liquid crystal display apparatus according to claim 1, further comprising an insulating layer formed between said first transparent substrate and said tablet electrode layer.

9. A tablet integrated type liquid crystal display apparatus comprising:

a first transparent substrate provided on a view side, wherein a counter electrode is formed on said first substrate;

a second substrate on which a driving layer composed of switching elements and pixel electrodes respectively connected to said switching elements is formed;

a plurality of insulative supports provided between said first substrate and said second substrate to prevent said first substrate from being bent;

a liquid crystal layer sandwiched by said first substrate and said second substrate such that said liquid crystal is driven by a voltage applied between said counter electrode and said pixel electrode; and

a tablet electrode layer provided between said first substrate and said counter electrode such that said tablet electrode layer is isolated from said liquid crystal layer.

10. A tablet integrated type liquid crystal display apparatus according to claim 9, wherein said tablet electrode layer is provided between said first substrate and an insulating layer.

11. A tablet integrated type liquid crystal display apparatus according to claim 9, wherein said tablet electrode layer is a tablet device layer and is provided between said first substrate and an insulating layer.

12. A tablet integrated type liquid crystal display apparatus according to claim 9, wherein said tablet electrode layer provided between said first substrate and an insulating layer such that said tablet electrode layer is isolated from said driving layer.

13. A tablet integrated type liquid crystal display apparatus according to claim 9, wherein said pixel electrodes functions as reflecting plates in addition to the driving of said liquid crystal.

14. A tablet integrated type liquid crystal display apparatus according to claim 9, wherein said first substrate is a plastic substrate and said second substrate is a glass substrate having a thickness in a range of 0.6 mm to 1.1 mm.

15. A tablet integrated type liquid crystal display apparatus according to claim 9, wherein each of said plurality of supports is arranged in correspondence with at least one pixel.

16. A tablet integrated type liquid crystal display apparatus comprising:

a first transparent plastic substrate provided on a view side, wherein said first substrate has a thickness equal to or thinner than 0.6 mm, and wherein a tablet electrode layer, an insulating layer and a counter electrode are laminated on said first substrate;

a second glass substrate having a thickness in a range 0.6 mm to 1.1 mm, wherein a driving layer composed of switching elements and pixel electrodes respectively connected to said switching elements is formed on said second substrate; and

a guest host liquid crystal layer sandwiched by said first substrate and said second substrate such that said guest host liquid crystal is driven by a voltage applied between said counter electrode and said pixel electrode,

wherein said tablet electrode layer is provided between said first substrate and said counter electrode such that said tablet electrode layer is isolated from said guest host liquid crystal layer.