Liquid crystal display

• US 20020033908A1
• Filed: 09/18/2001
• Published: 03/21/2002
• Est. Priority Date: 09/18/2000
• Status: Abandoned Application

• Current Assignee: Hitachi, Ltd.
• Original Assignee: Hitachi, Ltd.
• Inventors: Mori, Yuji, Shimura, Masato, Nagae, Yoshiharu
• Application Number:
  US09/953,914
• Publication Number:
  US 20020033908A1
• Time in Patent Office: Days
• US Class Current: 349/61
• CPC Class Codes: G02F 1/133603 with LEDs
• CPC Class Codes: G02F 1/133621 providing coloured light G02F1/133617, G02F1/133533 take precedence

Abstract

Improving low power consumption is provided. A multilayer structure of a first electrode and an organic light-emitting layer plus a second electrode is formed on a liquid crystal-side surface of one substrate of respective substrates that are disposed to oppose each other with a layer of liquid crystals interposed therebetween, featuring that the organic light-emitting layer emits light rays in a way responsive to receipt of a current which is caused to flow between the first electrode and the second electrode.

Claims

1. A liquid crystal display device comprising, on or over a liquid crystal-side surface of one substrate of respective substrates as disposed to oppose each other with a layer of liquid crystals interposed therebetween, a multilayer structure of a first electrode and an organic light-emitting layer plus a second electrode,

said organic light-emitting layer emitting light in response to a current flowing between the first electrode and the second electrode.

2. A liquid crystal display device comprising, on or over a liquid crystal-side surface of one substrate of respective substrates as disposed to oppose each other with a layer of liquid crystals interposed therebetween, first electrodes extending in the x direction and being parallel-provided in the y direction and an organic light-emitting layer as formed to cover these first electrodes plus second electrodes extending in the y direction and being parallel-provided in the x direction on a surface of this organic light-emitting layer,

regions for cross-over intersection between said first electrodes and said second electrodes being arranged to overlap respective pixel regions for individually driving said liquid crystals.

3. A liquid crystal display device comprising, on or over a liquid crystal-side surface of one substrate of respective substrates as disposed to oppose each other with a layer of liquid crystals interposed therebetween, first electrodes extending in the x direction and being parallel-provided in the y direction and an organic light-emitting layer as formed to cover these first electrodes plus second electrodes extending in the y direction and being parallel-provided in the x direction on a surface of this organic light-emitting layer;

and also comprising over a liquid crystal-side surface of a remaining substrate pixel electrodes extending in the x direction and being parallel-provided in the y direction,

said second electrodes also functioning as opposite electrodes for creation of an electric field between them and said pixel electrodes.

5. The liquid crystal display device as recited in any one of the preceding claims 3 and 4, wherein the pixel electrodes and the opposite electrode are formed of conductive material permitting transmission of light rays.

4. A liquid crystal display device comprising, on or over a liquid crystal-side surface of one substrate of respective substrates as disposed to oppose each other with a layer of liquid crystals interposed therebetween, first electrodes extending in the x direction and being parallel-provided in the y direction and an organic light-emitting layer as formed to cover these first electrodes plus second electrodes extending in the y direction and being parallel-provided in the x direction on a surface of this organic light-emitting layer;

and also comprising over a liquid crystal-side surface of a remaining substrate pixel electrodes extending in the x direction and being parallel-provided in the y direction,

said second electrodes also functioning as opposite electrodes for creation of an electric field between them and said pixel electrodes, and

said first electrodes being formed of a conductive material permitting reflection of light rays.

6. A liquid crystal display device comprising, on or over a liquid crystal-side surface of one substrate of respective substrates as disposed to oppose each other with a layer of liquid crystals interposed therebetween, a sequential multilayer structure of a first electrode and an organic light-emitting layer plus a second electrode;

and also comprising more than one pixel electrode on a liquid crystal-side surface of the remaining substrate,

said second electrode also functioning as an opposite electrode for creation of an electric field between it and said pixel electrode.

7. A liquid crystal display device comprising, on or over a liquid crystal-side surface of one substrate of respective substrates as disposed to oppose each other with a layer of liquid crystals interposed therebetween, a sequential multilayer structure of a first electrode and an organic light-emitting layer plus a second electrode,

at least one electrode of the first electrode and the second electrode being comprised of a plurality of stripe-shaped electrodes extending in one direction and being parallel-provided in a direction at right angles to said one direction,

an organic light-emitting layer in a region with these respective stripe-shaped electrodes formed therein being formed of a material permitting development of a color as selected from the group consisting of red, green and blue, and

the material of said organic light-emitting layer being chosen while letting the three colors be sequentially repeated in the parallel-provision direction of said stripe-shaped electrodes.

8. The liquid crystal display device as recited in claim 7, wherein said first electrode is comprised of a metal permitting reflection of light rays.