Image display device with a transistor on one side of insulating layer and liquid crystal on the other side

• US 5,317,433 A
• Filed: 12/01/1992
• Issued: 05/31/1994
• Est. Priority Date: 12/02/1991
• Status: Expired due to Fees

• Current Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Original Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Inventors: Nakamura, Yoshio, Miyawaki, Mamoru, Kondo, Shigeki, Kouchi, Tetsunobu
• Primary Examiner(s): Gross, Anita P.
• Application Number:
  US07/984,099
• Time in Patent Office: 546 Days
• Field of Search: 359/59, 359/74, 359/57, 359/67
• US Class Current: 349/45
• CPC Class Codes: G02F 1/133512 Light shielding layers, e.g. black matrix G02F1/136209 takes precedence
• CPC Class Codes: G02F 1/13454 Drivers integrated on the active matrix substrate G02F1/136277 takes precedence
• CPC Class Codes: G02F 2201/48 Flattening arrangements
• CPC Class Codes: G02F 2202/105 single crystal Si
• CPC Class Codes: H01L 2221/68363 used in a transfer process involving transfer directly from an origin substrate to a target substrate without use of an intermediate handle substrate
• CPC Class Codes: H01L 27/1214 comprising a plurality of TFTs formed on a non-semiconducting substrate, e.g. driving circuits for AMLCDs
• CPC Class Codes: H01L 27/1266 the substrate on which the devices are formed not being the final device substrate, e.g. using a temporary substrate

Abstract

Variations in the individual liquid crystal cells and cross-talk between adjacent pixels are reduced, stable operation is maintained and the aperture and the S/N ratio are increased by providing a transistor and an interconnection layer therefor on one surface of an insulating layer while providing an electrode for applying a voltage to a liquid crystal on the other surface thereof. One major electrode portion of the transistor and the liquid crystal voltage applying electrode are connected to each other using an electrode via an opening. Also, the electrode for connecting the major electrode portion 3 to the liquid crystal voltage applying electrode is provided on the other surface of the insulating layer such that it shield the transistor from light.

Claims

1. A liquid crystal image display device, comprising:

an insulating layer or base having two surface sides;

liquid crystal material;

a transistor and an interconnection layer for said transistor on one surface side of said insulating layer or base;

a liquid crystal voltage applying electrode for applying a voltage to said liquid crystal material on the other surface side of said insulating layer or base,

wherein one of major electrode portions of said transistor and said liquid crystal voltage applying electrode are connected to each other with an electrode on the other surface side of said insulating layer that it shields the transistor from light through an opening in said insulating layer.

2. The image display device according to claim 1, wherein the electrode for electrically connecting said major electrode portion to said liquid crystal voltage applying electrode is embedded in the opening in said insulating layer.

3. The image display device according to claim 1, wherein a first transparent electrode is connected to the major electrode portion, and a second transparent electrode is formed on said first transparent electrode with an insulating layer therebetween.

4. The image display device according to claim 1, further comprising a protective member which is provided on said insulating layer or base of said transistor through an adhesive layer.

5. The image display device according to claim 1, further comprising a resin layer provided on said insulating layer or base of said transistor.

6. The image display device according to claim 4, wherein said protective member is an organic or inorganic material.

7. The image display device according to claim 6, wherein said inorganic material is glass or quartz glass.

8. The image display device according to claim 6, wherein said organic material is a resin.

9. The image display device according to claim 8, wherein said resin material is polyethylene, polycarbonate, acrylic resins or polyvinyl chloride.

10. A liquid crystal image display device, comprising a pixel of liquid crystal material;

a thin-film transistor for driving said pixel; and

a driving interconnection for driving said thin-film transistor, said thin film transistor and driving interconnection being provided on one surface of an insulating layer film, said display device further comprising a display electrode connected to a drain region of said thin-film transistor provided on the other surface of said insulating layer film with a storage capacitor electrode provided immediately above a connection area between the drain region of said thin film transistor and said display electrode.

11. The image display device according to claim 10, further comprising a light-blocking layer on the other surface of said insulating film immediately below a channel region of said thin-film transistor.

12. The image display device according to claim 10, further comprising an electrode provided on the other surface of said insulating film immediately below a channel region of said thin-film transistor.