KR20040042726A - Luminous apparatus for key button in mobile device - Google Patents

Abstract

PURPOSE: A light emitting device for a key button of a portable terminal is provided to accurately grasp a pushed key and prevent an error operation by emitting the light of the pushed key as a color which is different from colors of the other keys which are not pushed. CONSTITUTION: A light emitting body(12) lights a key button(11) of a portable terminal. A control unit controls the light emitting body(12) so that colors of light emitted to a pushed key and the other keys which are not pushed differ. The light emitting body(12) has two or more photo diodes(3,13) for emitting inter-different lights.

Description

Key button light emitting device of portable terminal {LUMINOUS APPARATUS FOR KEY BUTTON IN MOBILE DEVICE}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a key button light emitting device of a portable terminal, and more particularly, to a key button light emitting device for preventing malfunction by increasing identification power of a key button.

In general, the portable terminal is spotlighted by the convenience of being easy to use anywhere indoors and outdoors, because it is also suitable for use at night. Therefore, when using a mobile phone at night is provided with a plurality of light emitting diodes installed on the bottom of the keypad so that the user can easily recognize the number of the keypad button.

1 is an exploded perspective view showing a structure of a conventional cellular phone.

The conventional mobile phone is configured to include a mobile phone body 20, a keypad 10 installed at the bottom of the body, and a printed circuit board 2 provided at the bottom of the keypad.

The body 20 is hinge-coupled with a main body having a key button through-hole 22 formed therein so that the key button 11 of the keypad penetrates therebetween, and a display unit provided with the liquid crystal 21. The keypad 10 has a plurality of key buttons 11 are integrally formed. A plurality of light emitting diodes (LEDs) 3 are provided on the printed circuit board 2.

Since it is configured as described above, the number of keypad buttons by the light emitted from the light emitting diodes 3 allows the user to easily identify a place where there is no light so that the user can use the mobile phone.

However, the conventional portable terminal does not distinguish between a key button pressed using a light emitting diode of the same color and a key button which is not pressed at all, and can identify whether the button is pressed only by a sense of a finger or a sound. have.

Therefore, even if the old eyes are dark or unfamiliar with numbers, it is difficult to pinpoint which button is pressed even when the key button is pressed, so that the same number is pressed again, thereby causing a malfunction.

The present invention has been made to solve the above problems, and an object thereof is to provide a light emitting device of a key button to increase the identification power of the key button to prevent a malfunction.

1 is a perspective view of a keypad and a PCB of a conventional portable terminal

Figure 2 is a perspective view of the keypad and the PCB of the portable terminal as an embodiment of the present invention

** Description of the symbols for the main parts of the drawings **

3, 13: photodiode 11: key button

12: illuminant

The present invention provides a light emitting unit for illuminating a key button of a portable terminal to achieve the object as described above; A control unit for controlling the light emitter such that the color of the pressed key button and the color of light irradiated on the unpressed key button are different; It provides a key button light emitting device of a portable terminal, comprising a.

In addition, the light emitter is preferably composed of two or more kinds of photodiodes emitting different light.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

However, in describing the present invention, a detailed description of known functions or configurations will be omitted in order not to disturb the gist of the present invention.

In addition, the same reference numerals are given to the same and the same components as those described above, and detailed description thereof will be omitted.

2 is a perspective view of the keypad and the PCB of the portable terminal as an embodiment of the present invention.

The portable terminal includes a keypad 10 having a plurality of key buttons 11, a PCB 2 to which the keypad 10 is coupled, and a key button light emitting device of a portable terminal installed on the PCB 2. do.

The key button light emitting device of the portable terminal includes: a light emitting unit 12 for illuminating the key button 11 of the portable terminal; A controller (not shown) for controlling the light emitter 12 such that the color of light irradiated to the pressed key button 11 is different from the color of light irradiated to the unpressed key button 11; It is configured to include.

The light emitter 12 is composed of two or more kinds of photodiodes emitting different light. That is, in FIG. 2, a yellow photodiode 3 emitting yellow light and a blue photodiode 13 emitting blue light are formed.

Hereinafter, the operation of the embodiment of the present invention will be described.

When the portable terminal operates, the controller (not shown) operates the yellow photodiode 3 to brighten the keypad 10. When the user presses the key button 11 of the keypad, the controller (not shown) turns off the yellow light diode 3 in proximity to the key button 11 and turns on the blue light diode 13. As a result, the pressed key button 11 is illuminated in blue, and the other key button 11 is illuminated in yellow.

Therefore, the user can clearly grasp the pressed key button and can clearly know whether the key button is pressed, thereby preventing malfunction.

Although the preferred embodiments of the present invention have been described above by way of example, the scope of the present invention is not limited to these specific embodiments, and may be appropriately changed within the scope described in the claims.

The present invention provides a key button light emitting device of a portable terminal, which can clearly grasp the pressed key by causing the color of the pressed key to emit light with a different color from that of the other key.

Claims (2)

A light emitting unit for illuminating a key button of the portable terminal; A control unit for controlling the light emitter such that the color of the pressed key button and the color of light irradiated on the unpressed key button are different; Key button light emitting device of a portable terminal, comprising a. The method of claim 1, wherein the light emitter A key button light emitting device of a portable terminal, characterized in that composed of two or more types of photodiodes emitting different light.