Keyboard of integrated electronic luminotron in keyboard rubber and its manufacturing method
A key and keyboard technology, applied in electroluminescent light sources, electric light sources, circuits, etc., can solve problems such as poor key click sensitivity and flexibility, misoperation, and inconsistent brightness
Inactive Publication Date: 2004-08-04
韩星电通科技股份有限公司
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- Abstract
- Description
- Claims
- Application Information
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Problems solved by technology
[0005] However, using the aforementioned keyboard with backlit LEDs results in inconsistent brightness
For example, a part of the keyboard that is closer to the LEDs looks bright, and a part that is farther away from the LEDs looks dark, due to the nature of point light sources, thus making visibility worse
[0006] In addition, because the above-mentioned keyboard using EL components uses adhesives to bond the keys to the keyboard rubber produced in another process, the click sensitivity and flexibility of these keys become poor.
Therefore, when a key is pressed, its adjacent keys will act at the same time, causing the problem of misoperation
Method used
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[0020] The invention will be described more fully hereinafter with reference to the accompanying drawings, in which preferred embodiments are given. The invention is capable of different implementation forms and is not to be construed as being limited to only the implementation forms mentioned herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. In the drawings, the thickness of layers and regions are exaggerated for clarity. It will also be understood that when a layer is referred to as being "on" another layer or substrate, it can be directly on the other layer or substrate, or intervening layers may also be present. Furthermore, the described and illustrated embodiments also include complementary conductivity type embodiments.
[0021] Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. ...
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The present invention discloses to a keypad with an EL device for a backlight united with a keypad rubber and a method for fabricating the same for improving a click sensitivity and visibility of keys and preventing a wrong operation of the keys by using a silicon injection process. The method for fabricating a keypad used in a portable terminal, comprises the steps of: fabricating a light-emitting device for a backlight; printing an adhesive on a front side and a back side of the light-emitting device; performing an injection process to form a silicon layer, the silicon layer united with the light-emitting device through the adhesive; cutting the light-emitting device united with the silicon layer in a regular shape suitable to the portable terminal; and attaching keys to portions of the silicon layer corresponding to a light-emitting portion of the front side in the light-emitting device.
Description
[0001] This application claims priority from Korean Patent Application No. 2003-4957 filed on January 24, 2003, the content of which is hereby incorporated by reference. technical field [0002] The present invention relates to a keyboard used in a portable terminal, and in particular to a keyboard with EL (Electron Light Emitting Tube) integrated in the rubber of the keyboard and its manufacturing method, so as to improve visibility and sensitivity of keystrokes, and prevent damage to the keys. misuse. Background technique [0003] The well-known keyboard used in mobile terminals is manufactured by adhering a keyboard rubber, which is made by keyboard molding processing to make a keyboard printed with letters or numbers, and then by using an adhesive to form a keyboard. A separate process to achieve. The keyboard manufactured in the above method is assembled by being fixed on a printed circuit board on which an LED (Light Emitting Diode) used as a backlight is arranged. ...
Claims
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IPC IPC(8): H05B33/12H01H11/00H01H13/02H01H13/14H01H13/70H01H13/702H01H13/83H04M1/22
CPCH04M1/22H01H2219/018H01H13/83
Inventor 韩玩洙高互锡李尚勋李英雨
Owner 韩星电通科技股份有限公司