Samsung Electronics Co., Ltd.

Shin-Chul Kang

Young-Ki Kim

Chang-Youn Hwang

Sung-Sun Park

Jae-Chul Jin

Yong-Wook Hwang

Ki-Duk Jang

Ho-Suk Rhyu

Yoon-Hee Lee

Yong-Wook Hwao

Hyun-Jung Jeong

Woo-Seok Chin

A keypad for an electronic device and manufacturing method thereof having at least one or more ink layers which selectively let pass or cut off a light wavelength of at least one or more light emitting diodes generating light in accordance with an opened or closed direction of a folder. At least one or more light emitting elements for generating light in various colors are provided, and a diffusion ink layer is arranged above the light emitting elements. At least one or more ink layers provided on the diffusion ink layer, wherein the ink layers selectively let passes or cut-off light wavelengths of the light emitting elements when the folder is rotated or slid in a longitudinal or perpendicular direction. A transparent or semi-transparent ink layer is provided on the ink layers, and a sheet film layer is provided on the transparent or semi-transparent ink layer.

Keypad for electronic device and manufacturing method thereof

An optical waveguide sheet that has an auxiliary layer for preventing light transmitted through the waveguide sheet from leaking or being lost and a manufacturing method thereof. The waveguide sheet transmits light from a light emitting element thereinto, and has a reflecting pattern for reflecting light forward. At least one auxiliary layer for providing a total reflection condition for preventing the light from leaking or being lost when the light is transmitted into the waveguide sheet is coated on the waveguide sheet.

Optical waveguide sheet and manufacturing method thereof

Disclosed is a manufacturing method of a keypad for a mobile phone and the keypad manufactured thereby, in which a vacuum deposition layer and a cellophane paper are attached to a lower surface of a key in the keypad. The keypad for a mobile phone includes a plurality of keys, each key includes a key body of a transparent resin material and a high-hardness transparent coating layer coated onto a surface of the key body in order to increase hardness, and each key comprises a key background color paint layer for color presentation, coated onto a lower surface of the key body; an opaque paint layer coated onto a lower surface of the key background color paint layer; a transparent marking portion formed by performing a laser processing according to a shape of a numeral, a character, or a symbol with respect to the lower surface of the key body so as to remove the color paint layer and the opaque paint layer; a metallic vacuum deposition layer formed on the lower surface of the key body and a lower surface of the opaque paint layer; and a transparent color-printed layer or a cellophane paper attached to a lower surface of the metallic vacuum deposition layer so as to present various colors.

Manufacturing method of keypad for mobile phone and keypad manufactured thereby

Growing community of inventors

Seoul, South Korea

Shin-Chul Kang