IP Library Granted Patent US 8,184,241
Granted Patent B2
US 8,184,241 · App. 12/213,852 · Granted May 22, 2012

Liquid crystal display device

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Quick Facts
Patent No.
US 8,184,241
App. No.
12/213,852
Granted
May 22, 2012
Kind
B2
Abstract

The present invention mechanically protects a surface of a miniaturized liquid crystal display device for mobile phone or the like without deteriorating image quality and without increasing a thickness of a whole display device. To achieve such an object, in the present invention, a liquid crystal display panel is constituted of a TFT substrate and a color filter substrate, a lower polarizer is adhered to a lower surface of the TFT substrate, and an upper polarizer is adhered to an upper surface of the color filter substrate. A face plate is adhered to the upper polarizer using an acrylic adhesive material which is cured by ultraviolet rays. For enhancing strength and adhesion property of the face plate, corners and side portions of the face plate are chamfered. By making a profile of the face plate smaller than a profile of the upper polarizer, the adhesion property of the face plate is enhanced. The present invention can protect the surface of the liquid crystal display panel without deteriorating image quality and without largely increasing a thickness of the display device.

Claims (3)

1. A liquid crystal display device including a liquid crystal display panel which has a TFT substrate on which pixel electrodes and TFTs for controlling signals to the pixel electrodes are arranged in a matrix array and a color filter substrate on which color filters corresponding to the pixel electrodes are formed, wherein

an upper polarizer is adhered to the color filter substrate, a face plate made of glass is adhered to the upper polarizer, and the face plate has a profile smaller than a profile of the upper polarizer, and

the upper polarizer and the face plate have an approximately rectangular shape, and the face plate is shorter than the upper polarizer by 0.5 mm or more with respect to a short-axis length and a long-axis length.

Assignments (8)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Jul 10, 2025
From: JAPAN DISPLAY INC
To: MAGNOLIA PURPLE CORPORATION
Reel/Frame 071890/0202 →
CHANGE OF NAME Recorded Nov 17, 2023
From: HITACHI DISPLAYS, LTD.
To: JAPAN DISPLAY EAST, INC.
Reel/Frame 065614/0223 →
CHANGE OF NAME Recorded Nov 17, 2023
From: JAPAN DISPLAY EAST, INC.
To: JAPAN DISPLAY, INC.
Reel/Frame 065614/0644 →
CHANGE OF ADDRESS Recorded Nov 17, 2023
From: JAPAN DISPLAY, INC.
To: JAPAN DISPLAY, INC.
Reel/Frame 065654/0250 →
NUNC PRO TUNC ASSIGNMENT Recorded Nov 17, 2023
From: PANASONIC LIQUID CRYSTAL DISPLAY CO., LTD.
To: PANASONIC INTELLECTUAL PROPERTY CORPORATION OF AMERICA
Reel/Frame 065615/0327 →
MERGER Recorded Dec 13, 2011
From: IPS ALPHA SUPPORT CO., LTD.
To: PANASONIC LIQUID CRYSTAL DISPLAY CO., LTD.
Reel/Frame 027482/0140 →
ATTACHED ARE (1) THE COMPANY SPLIT DOCUMENTS IN JAPANESE WITH ENGLISH TRANSLATION THEREOF AND (2) THE CERTIFICATE OF COMPANY SPLIT DOCUMENT IN JAPANESE WITH ENGLISH TRANSLATION, WHICH TOGETHER CONVEY 50% OWNERSHIP OF THE REGISTERED PATENTS AS LISTED IN THE ATTACHED TO EACH OF THE RECEIVING PARTIES (SEE PAGE 10, EXHIBIT 2-1, SECTION 1 OF THE ENGLISH TRANSLATION OF THE COMPANY SPLIT PLAN.) Recorded Dec 13, 2011
From: HITACHI, DISPLAYS, LTD.
To: HITACHI DISPLAYS, LTD.; IPS ALPHA SUPPORT CO., LTD.
Reel/Frame 027615/0589 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Jun 25, 2008
From: KUBOTA, HIDENAO; YAMADA, TAKAHIRO
To: HITACHI DISPLAYS, LTD.
Reel/Frame 021206/0931 →