LIQUID CRYSTAL DISPLAY DEVICE

• US 20110050612A1
• Filed: 08/25/2010
• Published: 03/03/2011
• Est. Priority Date: 08/26/2009
• Status: Active Grant

• Current Assignee: Panasonic Intellectual Property Corporation of America (Panasonic Holdings Corporation)
• Original Assignee: Hitachi Displays Limited (Japan Display Incorporated)
• Inventors: MATSUMOTO, Shohei, Oohira, Eiji
• Granted Patent: US 9,619,055 B2
• Time in Patent Office: Days
• US Class Current: 345/173
• CPC Class Codes: G02F 1/13332 Front frames
• CPC Class Codes: G06F 3/041 Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
• CPC Class Codes: G06F 3/0412 Digitisers structurally integrated in a display
• CPC Class Codes: G06F 3/04164 Connections between sensors and controllers, e.g. routing lines between electrodes and connection pads

Abstract

In a liquid crystal display panel including a touch panel and a front window, it is possible to reduce the reproduction cost of the touch panel, achieving a high yield in the reproduction of the touch panel. The touch panel and the front window are bonded together by a PET film and a UV curable resin. When air bubbles or other defects are found between the front window and the touch panel, the front window and the touch panel are detached by cutting the UV curable resin by a cutter blade, in order to reproduce the touch panel. The residue of the UV curable resin left on the PET film is removed by detaching the PET film from the touch panel. A tab in which the adhesive is not formed is provided in an end of the PET film, so that the PET film can be easily detached from the touch panel, starting from the tab.

Claims

1. A liquid crystal display device comprising:

a liquid crystal display panel;

a backlight;

a resin mold in which the liquid crystal display panel and the backlight are placed;

a touch panel attached to the liquid crystal display panel; and

a front window attached to the touch panel,

wherein the touch panel and the front window are bonded together by a plastic film including an adhesive material formed on a plastic substrate, and by a UV curable resin, and

wherein a tab in which the adhesive material is not formed is present in a corner of the plastic film.

2. The liquid crystal display device according to claim 1, wherein the plastic film is a PET film.

3. The liquid crystal display device according to claim 1, wherein a protrusion of the tab is 0.2 mm or more.

4. A liquid crystal display device comprising:

a liquid crystal display panel;

a backlight;

a resin mold in which the liquid crystal display panel and the backlight are placed;

a touch panel attached to the liquid crystal display panel; and

a front window attached to the touch panel,

wherein the touch panel and the front window are bonded together by a plastic film including an adhesive material formed on a plastic substrate, and by a UV curable resin, and

wherein an area in which the adhesive material is not formed is present in a corner of the plastic film.

5. The liquid crystal display device according to claim 4, wherein the plastic film is a PET film.

6. The liquid crystal display device according to claim 4,

wherein the area in which the adhesive material is not formed has a chamfered shape in the corner of the plastic film, and

wherein an amount of c in the chamfered corner is 0.2 mm or more.