KR960011704B1 - Number display apparatus using optical dial - Google Patents

Abstract

The system for displaying numerals using an optical dial instead of an LCD(liquid crystal display), includes an optical dial key pad displaying telephone numbers, an MCU(micro control unit) transmitting a signal in a row to the optical dial key pad power control line to operate an optical dial key pad. The system stores any data in the memory through the optical dial key pad to display a telephone number without a separate LCD.

Description

Numeric display device using optical dial

1 is an external view of a keypad of an optical dial.

2 is a schematic diagram of an optical dial keypad numeric display according to an embodiment of the present invention;

3 is a detailed circuit diagram of an optical dial keypad numeric display according to an embodiment of the present invention.

4 is a diagram illustrating an optical dial display process.

5 is a flowchart of a numerical display operation using an optical dial according to an embodiment of the present invention.

* Explanation of symbols for main parts of the drawings

D1-D15: Diode Q1-Q15: Transistor

10: optical dial keypad 30: MCU

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a numeric display device using an optical dial, and more particularly, to a numeric display device using an optical dial instead of a display device such as a liquid crystal display (LCD).

The keypad structure of a typical cordless phone usually consists of more than 15 key buttons and a liquid crystal display (LCD). Therefore, in the existing wireless telephone, an additional display device LCD is used for the wireless telephone with the optical dial to inform the user of the telephone number. That is, the telephone number stored in the memory could not be known without using an additional display device.

Meanwhile, a method of storing a telephone number using a speed dial function in a conventional wireless telephone is as follows. In order to enter a telephone number (eg, 720-1234), first, as shown in FIG. 1, the memory key is pressed, and then the key of the place where the telephone number is to be stored. Next, the user presses the telephone number 720-1234 to be input in turn, and then presses the memory key again to store the telephone number data.

If the user wants to see the phone number stored in the memory on the LCD, first press the memory key and then press the key where the phone number is stored. The phone number is displayed on the LCD. Subsequently, even when a new phone number is inputted, a new phone number is inputted by performing the above process.

In the conventional optical dial wireless telephone, an additional display device such as an LCD is mainly used to display or identify a telephone number.

The present invention provides an object for displaying a telephone number stored in a memory through an optical dial with a built-in LED (light emitting diode) without using an additional display device such as an LCD in an existing wireless telephone having an optical dial function. It is.

In order to achieve the above object, the present invention provides a wireless telephone having an optical dial configured to store and display arbitrary data in a memory through an optical dial keypad. It provides means for displaying via the built-in optical dial keypad.

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

1 is an external view of an optical dial keypad, in which case a telephone number is to be input or an input telephone number is displayed through the optical dial keypad. The storage method using the optical dial is the same as the conventional optical dial storage method. As described above, in order to store telephone number data, first press the memory key, and then press the telephone number key (for example, the ① key) of the place to be stored. Then press the phone number you want to enter, then press the memory key again to store the phone number memory.

On the other hand, the process that the phone number is displayed through the optical dial keypad, first, as shown in Figure 1, pressing the memory key, and then again pressing the key (for example, ① key) stored the phone number, Is displayed via the optical dial instead of being output to a conventional LCD. The process is shown in FIG.

The present invention shown in FIG. 2 shows the optical dial keypad 10 displaying the telephone number in the display method of FIG. 4, and 15 independent optical dial keypads and power supply control lines for operating the optical dial keypad 10. FIG. It consists of a microcontroller unit (MCU) 30 for transmitting signals in parallel. Each optical dial keypad 10 is composed of one transistor, one LED, and one resistor, as shown in FIG. 3, and includes 12 basic keys (1, 2, 3, 4, 5, 6, It consists of 15 keys including 7,8,9,0, #, *) and 3 function keys (A, B, C).

As shown in FIG. 2, the MCU 30 has 15 ports assigned to the optical dial keypad 10 to send signals in parallel to 15 signal lines. The MCU 30 controls the signals on the optical dial keypad based on the optical dial key input signal, and transmits signals to the optical dial keypad 10 and signals from the optical dial keypad. It consists of input ports (R1, R2, R3, R4, R5) for receiving. Rows of the optical dial keypad 10 are connected to R1, R2, R3, R4, and R5 of the MCU 30, respectively, and the vertical row of the optical dial keypad 10 is C1, C2, C3 of the MCU 30, respectively. Connected with. Accordingly, the signal of C1 of the MCU 30 is applied to the 1st, 4th, 7th, 10th, and 13th keys of the optical dial keypad 10, and the signal of C2 of the MCU 30 is applied to the optical dial keypad 10. 2, 5, 8, 11, 14 of the, and the signal of the C3 of the MCU 30, the optical dial keypad 10, 3, 6, 9, 12, 15 times Is applied to the key. Then, input signals of the 1st, 2nd, and 3rd keys of the optical dial keypad 10 are applied to the MCU 30 through R1; Input signals of the 4th, 5th, and 6th keys of the optical dial keypad 10 are applied to the MCU 30 through R2, and the 7, 8, and 9 keys of the optical dial keypad 10 are applied. The input signal of the key is applied to the MCU 30 through R3, and the input signals of the 10, 11, and 12 keys of the optical dial keypad 10 are applied to the MCU 30 through R4, The input signals of the 13th key, the 14th key, and the 15th key of the dial keypad 10 are applied to the MCU 30 through R5.

In order to confirm whether the optical dial key is pressed, the MCU 30 sequentially applies the low signals C1, C2, and C3 to the optical dial keypad 10, and outputs R1 output from the optical dial keypad 10. FIG. This can be seen from the signal states of R2, R3, R4 and R5.

As shown in FIG. 2, when there is no key input from the optical dial keypad 10, a circuit is not connected so that R1, R2, R3, R4, and R5 are connected to the MCU 30 by the power supply Vcc. Apply high signal. However, when there is a key input from the optical dial keypad 10, the input key is turned on to apply a low signal to the MCU 30. For example, if the number 9 key is pressed, the MCU 30 first applies a low signal (C1 = L, C2 = H, C3 = H) to the optical dial matrix 10 on the C1 line. Since there is no key 9 on the vertical axis of 10), signals of R1, R2, R3, R4, and R5 applied to the MCU 30 are high signals (R1 = H, R2 = H, R3 = H, R4 = H, R5 =). Output H).

When the MCU 30 applies the low signals (C1 = H, C2 = H, C3 = H) to the optical dial keypad 10 on the C2 line, since there is no number key on the vertical axis of the optical dial keypad 10, R1, R2, R3, R4, and R5 apply high signals (R1 = H, R2 = H, R3 = H, R4 = H, R5 = H) to the MCU 30.

When the MCU 30 applies the low signals (C1 = H, C2 = H, C3 = L) to the optical dial keypad 10 on the C3 line, there is a 9th key on the optical dial vertical axis. R3 is a low signal (R1 = H, R2 = H, , R4 = H, R5 = H). Therefore, the remaining key data input is also input to the MCU 30 in the same manner as described above. The MCU 30 receives and stores key data and controls a corresponding number on the optical dial through the LED.

As shown in FIG. 3, the optical dial keypads ①, ②, ③ ... ⑮ are connected to the output port of the MCU 30, and the LED is connected between the collector terminal of the transistor Q and ground. Meanwhile, when the row number is LR i and the column number is LC j, any LED may indicate a position with LEDs LR i and LC j. ①, ②, ③... Of the optical dial keypad 10 through the MCU 30 in general. Applying a high value to ⑮ causes the PNP transistor Q to turn off so that the LED does not light up. However, when displaying a number on the LED, for example, to indicate the number 1, the MCU 30 controls the LEDs so that the LEDs (1, 3), LED (2, 3), LED (3, 3), LED (4,3), LED (5,3) should be on. Therefore, when the MCU 30 outputs a low value to the ⑥, ⑨, ⑫, and ⑮ keys of the optical dial keypad 10 corresponding to the number 1, the transistor is turned on and the LED corresponding to the 1 value is turned on.

5 is a flowchart of a numerical display operation using the optical dial, which will be described with reference to FIG. First, the processor starts at block 10 and proceeds to block 12. Block 12 is a block for completing the storage of the input telephone number in the memory. When execution is finished in this block 12, the processor proceeds to decision block 14. In the determination block 14, the MCU 30 checks the inputted telephone number data. If the inputted telephone number data is incorrect, the function is repeated, but the inputted telephone number proceeds to block 16 if the data is correct. At block 16 the optical dials of all radiotelephones are turned off to proceed to block 18. Block 18 displays the phone number (e.g. 720-8589) stored in the memory via the optical dial, as shown in FIG. 4, first corresponding to the optical dial via the LED (number 7). Is output. Again in block 20, the time is delayed by a time (0.4 seconds) at which the user can detect the corresponding number output from the optical dial. At the end of this process, the process proceeds to block 22 to turn off all optical dials. The process then proceeds to block 24, delays the time (0.2 seconds) of the off optical dial, and then proceeds to decision block 26. Decision block 26 is a block for judging whether the inputted telephone number should be displayed next to the corresponding number through the optical dial. If there is the next corresponding number (number 2), the determination block 26 proceeds to block 18 again and the light is transmitted through the LED. Print the number (number 2) on the dial. In block 20, as described above, the time is delayed by a time (0.4 seconds) at which the user can detect the corresponding number output from the optical dial. Performing this process the process proceeds to block 22 to turn off all optical dials. The process then proceeds to block 24, delays the time (0.2 seconds) of the off optical dial, and then proceeds to decision block 26. As described above, the decision block 26 is a block for determining whether there is a corresponding phone number to be displayed next, and if there is a phone number to be displayed, the loop proceeds in the above manner, and the decision block 26 displays the corresponding number to be displayed on the optical dial. If there is no phone number, the process proceeds to block 28 where all execution is terminated. And, the process of outputting the corresponding telephone number to the optical dial by the above method is shown in FIG.

Claims (1)

A radiotelephone having an optical dial configured to store and display arbitrary data in a memory through an optical dial keypad, wherein the data inputted into the memory is displayed through an optical dial capacitor having a light emitting diode (LED). Numeric display using an optical dial comprising a means.