Tablet integrated liquid crystal display apparatus with less parallax

• US 6,295,101 B1
• Filed: 09/09/1999
• Issued: 09/25/2001
• 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): Parker, Kenneth
• Assistant Examiner(s): Duong, Tai V.
• Application Number:
  US09/393,025
• Time in Patent Office: 747 Days
• Field of Search: 349/12, 349/158, 349/138, 349/139, 349/165, 349/155, 349/156, 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 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 is formed on said first substrate;

a second glass substrate having a thickness in a 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;

a guest host liquid crystal layer sandwiched by said first substrate and said second substrate;

a counter electrode provided on said guest host liquid crystal layer on a side facing said first transparent plastic substrate, wherein said guest host liquid crystal is driven by a voltage applied between said counter electrode and said pixel electrode; and

an insulating layer having an uneven surface formed between said second glass substrate and said pixel electrode.

2. The tablet integrated type liquid crystal display of claim 1, further comprising a thin film transistor layer formed on said second glass substrate.

3. The tablet integrated type liquid crystal display of claim 2, wherein said insulating layer having the uneven surface is coated on said thin film transistor layer.

4. The tablet integrated type liquid crystal display of claim 1, further comprising a second insulating layer between said tablet electrode and said counter electrode.

5. 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 and a counter electrode are formed on said first substrate;

a second glass substrate having a thickness in a range 0.6 mm to 1.1 mm, wherein an insulating layer and a driving layer which is composed of switching elements and pixel electrodes respectively connected to said switching elements are laminated on said second substrate, wherein said insulating layer has an uneven surface facing said pixel electrode; 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.

6. The tablet integrated type liquid crystal display of claim 5, further comprising a thin film transistor layer formed on said second glass substrate.

7. The tablet integrated type liquid crystal display of claim 6, wherein said insulating layer having the uneven surface is coated on said thin film transistor layer.

8. The tablet integrated type liquid crystal display of claim 5, further comprising a second insulating layer between said tablet electrode and said counter electrode.