El sheet and dome keypad using the same

A technology of dome and key, applied in the direction of telephone structure, electrical components, electric switches, etc., can solve the problems such as the key pressing state cannot be accurately identified, serious problems of EL panel product performance, uneven color tone and brightness, etc., and achieve improvement. Workability and productivity, improved scattering of light, effects of minimizing the effects of static electricity and electromagnetic waves

Inactive Publication Date: 2007-05-16
HANWOOL INFORMATION TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As a result, when the user presses the key of the metal dome key provided in the EL method, the pressed state of the key cannot be accurately recognized due to the poor click rate, causing the user to press the key many times
[0020] At the same time, if it is affected by static electricity and electromagnetic waves, it may bring serious problems in the product performance of the EL board applied to the metal dome key of the EL method
In particular, the particulate component of the luminescent substance usually emits light with a radius of 20-50 μm, and due to the existence of shadows between particles, for example, there is usually a problem of uneven color tone or brightness

Method used

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  • El sheet and dome keypad using the same
  • El sheet and dome keypad using the same
  • El sheet and dome keypad using the same

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Embodiment Construction

[0039] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. First, an EL panel for a key according to the present invention will be described in detail.

[0040] The EL panel for keys according to the present invention comprises an EL system with a lighting structure, and an electrostatic protection layer, a scattering layer or at least one of the two layers on the upper surface of the EL system. In addition, the EL system includes an anti-noise layer and an electrostatic protection layer, or at least one of the two layers under the EL system.

[0041] Referring to Fig. 5, it is a cross-sectional view of an embodiment of the EL board according to the present invention, preferably, according to the EL board of the present invention for keys according to the anti-noise layer 21, insulating layer 22, bottom surface electrode layer 23, medium Layer 24 , light emitting layer 25 , front surface electrod...

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Abstract

The invention discloses an EL sheet and a dome keypad using the same. The EL sheet has an improved capability of light dispersion that can minimize the influence of static electricity or the electromagnetic waves, and by applying the EL sheet, the dome keypad of EL method can accurately recognize a pressed state of a key to increase the stability of the product and click rate. Accordingly, the present invention applied to communication devices such as mobile phones can perform a signal generation and various supplementary functions, and particularly can be adequately used for a keypad having a function of distinguishing numbers or characters in the dark or at night.

Description

technical field [0001] The present invention relates to an EL sheet (Electroluminescence sheet) and a dome keypad using the same, and more particularly to an EL sheet and a dome keypad using the same configured to minimize the influence of static electricity and electromagnetic waves and improve light scattering. Background technique [0002] Generally, keys are applied to communication devices such as mobile phones for practical purposes, such as switches for implementing various auxiliary functions including generating signals, especially keys for identifying and selecting input characters or symbols at night or in dark places. [0003] Referring to the prior art shown in FIG. 1, a metal dome key of a light emitting diode (LED) method is widely used, and the dome key comprises a key top (key top) 110, a metal dome plate 120, a printed circuit board (PCB) 130 and LED140. [0004] Referring to FIG. 1 , the metal dome plate 120 is composed of a top glue 122 , a metal dome 12...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04M1/23H01H13/70
CPCH01H2239/008H01H2239/004
Inventor 李龙熙白云浩千炳东崔基燮安钟喆鞠炅杉
Owner HANWOOL INFORMATION TECH
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