Liquid crystal display panel and method for manufacturing the same

• US 8,154,675 B2
• Filed: 04/28/2009
• Issued: 04/10/2012
• Est. Priority Date: 05/12/2008
• Status: Active Grant

• Current Assignee: Japan Display West Incorporated (Japan Display Incorporated)
• Original Assignee: Sony Corporation (Sony Group Corp.)
• Inventors: Imai, Katsuhiro, Kiyose, Kanechika, Kakehi, Kennosuke, Taguchi, Satoshi
• Primary Examiner(s): Stahl, Mike
• Application Number:
  US12/431,197
• Publication Number:
  US 20090279009A1
• Time in Patent Office: 1,078 Days
• Field of Search: None
• US Class Current: 349/40
• CPC Class Codes: G02B 5/3025 Polarisers, i.e. arrangements capable of producing a definite output polarisation state from an unpolarised input state G02B5/3008, G02B5/3016 take precedence
• CPC Class Codes: G02F 1/133334 Electromagnetic shields
• CPC Class Codes: G02F 1/134363 for applying an electric field parallel to the substrate, i.e. in-plane switching [IPS]
• CPC Class Codes: G02F 1/136218 Shield electrodes
• CPC Class Codes: G02F 2202/28 Adhesive materials or arrangements
• CPC Class Codes: H01L 27/0248 for electrical or thermal protection, e.g. electrostatic discharge [ESD] protection

Abstract

A lateral electric field liquid crystal display panel is provided which includes a pair of substrates, a liquid crystal enclosed between the pair of substrates, liquid crystal-drive electrodes provided on one of the pair of substrates, a translucent electrostatic shielding layer provided on an exterior surface of at least one of the pair of substrates, and a polarizer disposed on the translucent electrostatic shielding layer, and in this liquid crystal display panel, the translucent electrostatic shielding layer has properties not to disappear by a chemical reaction with a material forming the polarizer.

Claims

1. A lateral electric field liquid crystal display panel comprising:

a pair of substrates;

a liquid crystal enclosed there between;

liquid crystal-drive electrodes provided on one of the pair of substrates;

a translucent electrostatic shielding layer provided on an exterior surface of at least one of the pair of substrates; and

a polarizer disposed on the translucent electrostatic shielding layer,

wherein the translucent electrostatic shielding layer has properties not to disappear by a chemical reaction with a material forming the polarizer,

wherein the translucent electrostatic shielding layer has a thickness of 100 to 200 Å

;

wherein the translucent electrostatic shielding layer includes a transparent conductive film or a conductive adhesive in which conductive particles are dispersed in an adhesive which is adhered to the polarizer;

wherein the transparent conductive film or the conductive particles primarily includes SnO₂ or a mixture of SnO₂ and at least one other metal; and

wherein the mixture of SnO₂ and at least one other metal further includes at least one of Ta₂O₅, Nb₂O₅, and TiO₂.

2. The liquid crystal display panel according to claim 1, wherein the translucent electrostatic shielding layer has a sheet resistance of 9×

10⁶Ω

/□

or less and a transmittance of 90% or more.

3. A lateral electric field liquid crystal display panel comprising:

a pair of substrates;

a liquid crystal enclosed there between;

liquid crystal-drive electrodes provided on one of the pair of substrates;

a translucent electrostatic shielding layer provided on an exterior surface of at least one of the pair of substrates; and

a polarizer disposed on the translucent electrostatic shielding layer,

wherein the translucent electrostatic shielding layer has properties not to disappear by a chemical reaction with a material forming the polarizer,

wherein the translucent electrostatic shielding layer has a thickness of 100 to 200 Å

; and

further comprising a ground terminal provided for one of the pair of substrates, wherein the ground terminal is electrically connected to the electrostatic shielding layer.

4. A lateral electric field liquid crystal display panel comprising:

a pair of substrates;

a liquid crystal enclosed there between;

liquid crystal-drive electrodes provided on one of the pair of substrates;

a translucent electrostatic shielding layer provided on an exterior surface of at least one of the pair of substrates; and

a polarizer disposed on the translucent electrostatic shielding layer,

wherein the translucent electrostatic shielding layer has properties not to disappear by a chemical reaction with a material forming the polarizer, and

wherein the translucent electrostatic shielding layer includes a transparent conductive film or a conductive adhesive in which conductive particles are dispersed in an adhesive which is adhered to the polarizer, and the transparent conductive film or the conductive particles includes a mixture of SnO₂ and at least one of Ta₂O₅, Nb₂O₅, and TiO₂.