KR0137054B1 - Mobile station apparatus in digital mobile communication system - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mobile station apparatus in a digital mobile communication system, wherein a function switch includes a program that lists functions, and displays each function content on a liquid crystal display, and then displays a function key so that a selection key can be selected. Consisting of a selection key for selecting a function displayed on the screen by means of which the keypad of the mobile station device prints characters directly, and then the contact portion of the printed circuit board is painted with conductive paint, and a short between the keypad and the printed circuit board is obtained. It is configured by inserting a thin film film to prevent the back light (Back Light) is characterized in that the light is emitted through the thin hole by inserting the LED into the hole (hole) of the printed circuit board, The effect is to reduce the size.

Description

Mobile Station Apparatus in Digital Mobile Communication System

1 shows a conventional mobile station apparatus.

2 is a diagram showing a mobile station apparatus according to the present invention.

The present invention relates to a mobile station apparatus in a digital mobile communication system.

As shown in FIG. 1, the keypad of a conventional mobile station apparatus includes 12 Numeric Keys (including 0 to 9 and *, #), RCL (recall), MENU, CLR (clear), Composed of 21 or 24, including MUTE, END, PWR (power), SEND, STO (store), Volume, and two scrolls.

In addition, the mobile station device displays the phone number, battery status and logo selected using the liquid crystal display as a basic menu, and the displayed screen is composed of in use, no srv (no service), roam, cdma, and msg (message). It displays the current situation of the user.

The mobile station device in the digital mobile communication system is a little more complicated than the existing analog method and has some functions in addition to the built-in built-in, which has the disadvantage that the weight of the CDMA terminal (dual mode) increases and the weight increases. There is an inconvenience in the following, and there is a problem that the unit price is increased at the time of the hardware configuration is uneconomical.

It is therefore an object of the present invention to provide a mobile station apparatus which significantly reduces volume and weight by reducing the complexity of additional circuitry and keypads according to the digital mobile station apparatus.

In order to achieve the above object, a mobile station apparatus in a digital mobile communication system according to the present invention is a mobile station apparatus of a conventional digital mobile communication system, comprising: a display unit for displaying a function menu and an operation state of a mobile station apparatus; A microprocessor for displaying the entire function menu of the mobile station apparatus on the display unit and allowing the user to move the menu by using the left and right navigation buttons for the displayed entire function menu; A button section for controlling the display of the full function menu provided by the microprocessor and for executing an operation of the mobile station apparatus; The button unit and a keypad unit for electrical connection with the microprocessor, wherein the button unit is one function control button for instructing the microprocessor to display the entire function menu, and a power operation button for selecting the on or off of the power And a predetermined number of dial buttons for performing dial and shift commands, wherein the keypad portion directly prints a character on the keypad, and then the PCB substrate contact portion is painted with conductive paint, and the thin sheet is sorted between the keypad and the PCB. By inserting the prevention film film and drilling only the film part corresponding to the key button, it touches only when the button is operated, and when carrying, it prevents the short without the cover for preventing the short, and inserts the backlight LED into the hole of the PCB board. Characterized in that configured to allow light to come out through the hole.

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

1 is a diagram showing a conventional mobile station apparatus.

As shown in FIG. 1, the keypad of a conventional mobile station apparatus includes 12 Numeric Keys (including 0 to 9 and *, #), RCL (recall), MENU, CLR (clear), Composed of 21 or 24, including MUTE, END, PWR (power), SEND, STO (store), Volume, and two scrolls.

2 is a diagram showing a mobile station apparatus according to the present invention.

As shown in FIG. 2, in the present invention, the function switch and the number switch are separated, and the function switch and the select key are configured for the function switch.

The function key displays a function of each function on the LCD screen by embedding a program listing the functions, and then displays the function keys so that the function keys can be selected using the selection key. Thus, the present invention can significantly reduce the number of key switches.

For example, there are only two function keys and two selection keys, and RCL, MENU, CLR, END, PWR, SEND, MUTE, STO, SCR (Volume Scroll) are displayed on the LCD screen when you press a function key. Selecting using the selector key switch will reduce the number of key switches and simplify the use.

Thus, two key switches can be used instead of ten key switches to take full advantage of the functionality of all mobile station devices.

This simplifies key scans and simplifies interrupt routines on the microprocessor.

Specifically, if the INT0 of the microprocessor is the interrupt signal of the MSM chip, and the keypad of the MSM chip is GPIO_0 to GPIO_17 with the key scan, the key matrix becomes complicated and the key matrix becomes complicated. Complex.

The proposed method reduces the number of GPIO select lines from 17 to about 10, shortens the delay time when an interrupt occurs, simplifies the PCB board design, and facilitates circuit design.

Less keypads can reduce the size of digital hardware boards.

Next, the conventional mobile station device is composed of a liquid crystal display and a keypad, and in some companies, the keypad cover is designed to prevent the press of the keypad when carrying, but the keypad is designed in the following manner. The unit cost is greatly saved, and the weight generated when carrying can be greatly reduced.

Conventional keypads are made of silicon rubber in the form of silicone rubber by coding conductive rubber on the PCB, which makes the manufacturing process complicated and economical.

The present invention has the advantage that the manufacturing cost is reduced and the weight can be reduced by designing the keypad portion of the mobile station apparatus in a membrane manner.

By directly filming the printed circuit board on the PCB, the letters are printed directly on the keypad area, then the PCB board contact area is painted with conductive paint and a thin film is sandwiched between the keypad and the PCB to prevent shorting.

At this time, if the key switch part has a round hole, only the number is selected by hand and the short is prevented when carrying.

On the other hand, the back light required for use at night was thick by attaching the LED directly to the PCB board. However, in the film method, the light is inserted through the thin hole by inserting the LED into the hole of the PCB board. Designing to be able to come out is no problem at all and has the effect of reducing the thickness.

An additional advantage is that existing keypads require about six LEDs for backlighting, but the number of keyswitches is reduced, which reduces the size of the keypad, requiring only four LEDs.

Therefore, the power consumption of the LED can be reduced at night or during normal use.

Since the number of keys related to the function switch according to the present invention configured as described above can be reduced, the circuit design can be facilitated and the size of the device can be reduced.

In addition, by manufacturing the keypad by the present invention, there is an effect that can significantly reduce the weight and manufacturing cost.

In addition, since the backlight is manufactured by the present invention, it is possible to reduce the thickness of the keypad and reduce the power consumption of the LED.

Claims (1)

A mobile station apparatus of a digital mobile communication system, comprising: a display unit for displaying a function menu and an operation state of a mobile station apparatus; A microprocessor for displaying the entire function menu of the mobile station apparatus on the display unit and allowing the user to move the menu using the left and right navigation buttons for the displayed entire function menu; A button unit for controlling the display of the full function menu provided by the microprocessor and executing an operation of the mobile station apparatus; Comprising the keypad portion for the electrical connection with the button unit and the microprocessor, The button unit includes one function control button for instructing the microprocessor to display the entire function menu, a power operation button for selecting on and off of the pow, and a predetermined number of dial buttons for executing the dial and forward / backward commands. Composed, The keypad part directly prints the characters on the keypad, and then the PCB board contact part is painted with conductive paint, a thin anti-short film film is inserted between the keypad and the PCB, and only the button part corresponding to the key button is punched in a circular motion. The mobile station apparatus in the digital mobile communication system, which is configured to prevent shorting when the cell is contacted and carried out without a short prevention cover, and to insert light into the hole of the PCB board so that light can be emitted through the thin hole. .