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Keypad and keypad assembly

A keyboard component and keyboard technology, applied in the direction of electrical components, legends, electric switches, etc., can solve the problems of increasing power consumption and manufacturing costs

Inactive Publication Date: 2009-03-18
SAMSUNG ELECTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this regard, if more LEDs are installed to improve the uniformity of illumination of the button 140, power consumption and manufacturing costs will be increased.

Method used

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  • Keypad and keypad assembly
  • Keypad and keypad assembly
  • Keypad and keypad assembly

Examples

Experimental program
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Embodiment Construction

[0025] Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. For clarity and conciseness, detailed descriptions of well-known functions and constructions associated therewith are omitted so as not to obscure the gist of the present invention.

[0026] figure 2 It is a sectional view illustrating the keyboard assembly according to the first embodiment of the present invention. As shown in the figure, the keyboard assembly 200 includes a keyboard 210 , a switch plate 250 facing the keyboard 210 , at least one light emitting device 290 , and a second PCB 280 .

[0027] The keypad 210 includes a light guide plate 220, a plurality of buttons 245, a plurality of protrusions 240, and a plurality of reflective patterns 230 (shown by solid triangles).

[0028] The light guide plate 220 retains light propagating therein. The coupled light propagates from one side surface of the light guide plate 220 to the opposite side surf...

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PUM

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Abstract

A keypad includes a light guide panel, the interior of which light propagates through, at least one key button positioned on the upper surface thereof, and at least one reflective pattern fixedly positioned with respect to the light guide panel to reflect a part of the light, which propagates through the interior of the light guide panel, towards the key button.

Description

technical field [0001] The present invention relates to a keyboard for a portable terminal, and more particularly, to a keyboard with a light guide plate and a keyboard assembly. Background technique [0002] A keyboard for a portable terminal usually has: a plate-shaped elastic backing plate; a plurality of buttons formed on the upper surface of the elastic backing plate, and characters are printed on the upper surface of each button; There is a protrusion (or actuator) which is located at the opposite end of the upper surface of the resilient backing plate. The portable terminal usually has a plurality (ie, 15-20) of light emitting devices, which are used as a backlight source for the keyboard. [0003] figure 1 It is a sectional view of a keyboard assembly according to the prior art. The keyboard assembly 100 includes a keyboard 110 , a switch plate 150 and a plurality of light emitting diodes (LEDs) 170 . [0004] The keyboard 110 includes: an elastic backing plate 1...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01H13/70H01H13/702H01H13/02
CPCH01H2219/044H01H2219/062H01H2219/056H01H13/14H01H13/70
Inventor 李周勋郑善太金京濂赵炳德张东薰
Owner SAMSUNG ELECTRONICS CO LTD