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Flexible el dome sheet and flexible el dome sheet keypad using the same

一种致发光、柔性电的技术，应用在柔性EL圆顶片键盘领域，能够解决生产率降低、增加工艺、困难等问题

Inactive Publication Date: 2007-04-18
KOREA ELECTRIC LUMINOUS ELEMENTS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As mentioned above, several additional processes are required, thus reducing productivity and increasing process difficulty

Method used

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  • Flexible el dome sheet and flexible el dome sheet keypad using the same
  • Flexible el dome sheet and flexible el dome sheet keypad using the same
  • Flexible el dome sheet and flexible el dome sheet keypad using the same

Examples

Experimental program
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Embodiment Construction

[0019] Preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0020] FIG. 1 is a diagram schematically showing a flexible EL sheet.

[0021] Referring to Fig. 1, the flexible EL sheet 110 comprises a polymer insulating layer with a thickness of 5 to 50 microns; a conductive layer formed on the polymer insulating layer, the thickness of the conductive layer being 3 to 15 microns; The first electric field polymer layer formed on the layer, the thickness of the first electric field polymer layer is 1 to 3 microns; the dielectric layer formed on the first electric field polymer layer, the thickness of the dielectric layer 3 to 25 microns; the second electric field polymer layer formed on the dielectric layer, the thickness of the second electric field polymer layer is 1 to 3 microns; the second electric field polymer layer formed on the Phosphor layer, the thickness of the phosphor layer is 30 to 50 microns; a...

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PUM

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Abstract

A flexible EL dome sheet uses a polymer insulation layer having a thickness of 5 to 50 gm as a substrate, and therefore, the thickness of the flexible EL dome sheet is 50 to 150 gm. The flexible EL dome sheet comprises a flexible EL sheet having key patterns formed thereon and metal or poly domes attached to the EL sheet. Since the flexible EL sheet and the metal or poly domes are used, the flexible EL dome sheet has excellent flexibility and durability, and an additional process for silicon molding is not necessary. Furthermore, the tactile feel of the flexible EL dome sheet keypad is improved. Electric connection between an EL driver of a flexible printed circuit board and the flexible EL sheet is achieved using a contact pad terminal structure, whereby no additional connector is necessary, and therefore, an FPC connecting process is not required.

Description

technical field [0001] The present invention relates to a flexible electroluminescent (EL) dome sheet and a flexible EL dome sheet keyboard using the EL dome sheet, and more particularly to a flexible EL sheet comprising a flexible EL sheet and a metal or polymer dome A dome sheet and a flexible EL dome sheet keyboard using the EL dome sheet. Background technique [0002] Typically, dome sheets or sheet switches used in mobile phone keypads are manufactured by attaching a plurality of metal or polymer domes to predetermined positions of a dome-fixing sheet. [0003] An electroluminescent (hereinafter referred to as "EL") dome sheet includes a dome switch and an EL sheet integrally formed on the dome switch. The EL dome sheet is placed between the printed circuit board and the keypad for illuminating the keypad without the need for other light sources such as LEDs. [0004] An EL device used in a conventional EL dome sheet uses an ITO-sprayed PET sheet (hereinafter referred...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05B33/00H01H13/70H01H13/83
CPCH01H2205/026H01H2219/018H01H13/7006H01H13/83H05B33/00
Inventor 申东赫裵光赫
Owner KOREA ELECTRIC LUMINOUS ELEMENTS CO LTD
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