Touch panel with polarizer, flat panel display with the touch panel and manufacturing method thereof

• US 20050030294A1
• Filed: 03/15/2004
• Published: 02/10/2005
• Est. Priority Date: 03/16/2001
• Status: Abandoned Application

• Current Assignee: Atouch Co., Ltd.
• Original Assignee: Atouch Co., Ltd.
• Inventors: Ahn, Young-Soo, Cheon, Tae-Ho
• Application Number:
  US10/801,154
• Publication Number:
  US 20050030294A1
• Time in Patent Office: Days
• US Class Current: 345/173
• CPC Class Codes: G02F 1/13338 Input devices, e.g. touch panels
• 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 3/045 using resistive elements, e.g. a single continuous surface or two parallel surfaces put in contact
• CPC Class Codes: G06F 3/0488 using a touch-screen or digitiser, e.g. input of commands through traced gestures

Abstract

An improved touch panel with polarizer, a flat panel display with touch panel, and a laminating method. The improvement having an adhesive layer, provided on an upper base of the polarizer in order to manufacture a laminate structure; or dot spacers formed between transparent conductive films are formed so that substrates can be laminated to each other. The touch panel with polarizer includes: dot spacers between transparent conductive films so that substrates can be laminated to each other; the polarizer bonded to a lower sheet has an adhesive layer bonded to the touch panel causing the polarizer to be integrated with the panel, and another adhesive layer causing the polarizer to be bonded to the liquid crystal display; and the other polarizer is bonded to the liquid crystal display. A touch panel is bonded together, and a polarizer is bonded to the panel, and the liquid crystal display is bonded to an adhesive layer on the polarizer. Lightness and thinness of the touch panel with the polarizer, and the flat panel display with the touch panel is obtained. Also, loss of light transmissivity is reduced, and defects resulting from deformation of the touch panel is removed. High yield and reliability can be obtained in the laminating method.

Claims

1-7. -7. (Canceled).

8. An improved touch panel with integrally formed polarizer, having a touch panel with an upper substrate having an upper sheet and a transparent conductive film formed below said upper sheet, a lower substrate having a transparent conductive film and a lower sheet formed below said transparent conductive film, dot spacers for insulating said upper and lower substrates from each other, and electrodes for applying voltage to a resistive film disposed between said upper and lower sheets;

and a polarizer bonded to said lower sheet of said touch panel for converting visual light to linearly polarized light, the improvement comprising;

said dot spacers formed so that said upper and lower substrates are laminated together;

said polarizer having an upper base, an optical film base and a lower base;

an adhesive layer provided on said upper and lower bases of said polarizer.

9. The improved touch panel with the polarizer integrally formed therein as claimed in claim 8, wherein said adhesive layer of said polarizer is formed as an entirely deposited face having a constant thickness so that said polarizer is entirely covered with said adhesive layer.

10. An improved flat panel display with a touch panel integrally formed therein, which comprises a touch panel including an upper substrate having an upper sheet and a transparent conductive film formed below said upper sheet, a lower substrate having a transparent conductive film like said transparent conductive film of said upper substrate and a lower sheet formed below said transparent conductive film, dot spacers for insulating said upper and lower substrates from each other, and electrodes for applying voltage to a resistive film disposed between said upper and lower sheets;

a polarizer bonded to said lower sheet of said touch panel for converting visual light to linearly polarized light;

a liquid crystal display device bonded to said polarizer and including an upper glass sheet, liquid crystals and a lower glass sheet; and

another polarizer bonded to said lower glass sheet of said liquid crystal display device, the improvement comprising;

said dot spacers formed so that said upper and lower substrates are laminated together;

said polarizer bonded to said lower sheet having an upper base, an optical film base and a lower base, and an adhesive layer, on said upper base thereof, which is bonded together to said lower sheet of said touch panel and causes the polarizer to be integrated with said touch panel, and another adhesive layer causing said polarizer to be bonded to said upper glass sheet of said liquid crystal display device, on a lower face of said lower base; and

said polarizer bonded to said lower glass sheet of said liquid crystal display device having an adhesive layer, an upper base, an optical film base and a lower base, is then bonded to said lower glass sheet of said liquid crystal display device.

11. The improved flat panel display with the touch panel integrally formed therein as claimed in claim 10, wherein said adhesive layer disposed on said polarizer is formed as an entirely deposited face having a constant thickness so that said polarizer is entirely covered with said adhesive layer.

12. An improved method for manufacturing a flat panel display with a touch panel integrally formed therein by bonding one face of a polarizer to a lower sheet of said touch panel, forming a laminate structure of said touch panel with said polarizer integrally formed therein, and bonding the opposite face of said polarizer of said touch panel with said polarizer integrally formed therein to an upper glass sheet of a liquid crystal display device, the improvement comprising the steps of:

forming dot spacers on a transparent conductive film of said lower sheet and bonding upper and lower substrates of said touch panel with transparent conductive films of upper and lower sheets facing each other;

bonding said lower sheet of said touch panel to an adhesive layer formed on said polarizer; and

bonding said upper glass sheet of said liquid crystal display device to another adhesive layer formed on another face of said polarizer bonded with said lower sheet.