KR20000040875A - Method for acknowledging key input in television - Google Patents

Abstract

PURPOSE: A method for acknowledging key input in televisions is provided to ignore same key inputs in a predetermined time interval to compensate for the error of the contact between key buttons if front mask for TV and that of remote controller. CONSTITUTION: A method for acknowledging key input in televisions includes first thru forth steps. At the first step(S3), whether control signals are repeatedly input from a key pad on a front mask or on a remote controller is determined. At the second step(S5), whether the repeated control signals is same is determined. At the third step(S7), the time interval between control signals is detected, and whether the time input is shorter than a reference time is determined. At the forth step(S8), the control signals after the first control signal is ignored.

Description

Key input recognition method for TV system

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for checking a key input of a television, in particular, when a control signal inputted through a key button mounted on a front mask of a television receiver or a key button of a remote control device occurs more than a contact portion of a key button switch. The present invention relates to a key input confirmation method for a television that detects this and delivers the same to a microprocessor inside the television receiver.

Generally, the front mask key button 1 and the remote control, as shown in FIG. 1, as a means for inputting a control signal such as power on / off, channel change, volume adjustment, etc. to a television system. A device, that is, a remote control 2 is provided. In Fig. 1, reference numeral 3 denotes a microcomputer for determining the operation of the television system according to the control signals input from the front mask key button 1 and the remote controller 2.

In the television receiver as described above, a plurality of key buttons are provided as a means for inputting control signals to the front mask key button 1 and the remote controller 2. In this case, the plurality of key buttons are typically made of a tact switch, and the tact switch has a contact portion that is turned on according to a user's pressing operation. However, the contact portion of the tact switch has a problem in that the shape is deformed or the contact distance is changed with time, thereby generating a signal that is not desired by the user.

In more detail, when a user presses a key button for channel change or volume adjustment, if there is an error in the contact unit, the contact unit may perform on and off operations several times. As a result, a control signal desired to change the channel or adjust the volume by the number of on and off operations is input to the microprocessor inside the television system.

As a result, the control signal is input several times, so that the TV system may change to a channel that is not desired by the user, or may be changed to be too loud or too low than the volume desired by the user.

An object of the present invention for solving the above problems is to check the time interval between each control signal when the same control signal is continuously input to the microprocessor of the television system, if the same signal is input within the reference time key Determination of the key input of the TV to allow the television system to be adjusted to the desired state by allowing the television system to be adjusted to the desired state by inputting only the first input control signal by judging it as an input signal due to an abnormality in the contact portion of the tact switch of the button. To provide.

1 is a block diagram showing means for inputting a control signal into a general television system;

2 is a block diagram of a general television system to which the present invention is applied.

3 is a flowchart showing a key input confirmation method for a television according to the present invention.

Explanation of symbols for main parts of the drawings

1 antenna 2 RF amplifier

3: First Mixer 4: IF Amplifier

5: P / S separation unit 6: voice detector

7: image detector 8: remote control device

9: receiver 10: channel memory

11: microprocessor 12: OSD device

13: PWM generator 14: Integrating circuit

15: AFT circuit 16: adder

17 local oscillation circuit 18 AGC circuit

19; External AV device 20: first switching unit

21: voice processor 22: voice amplifier

23: image processing unit 24: the second mixer

25: CRT drive unit

A feature of the present invention for achieving the above object is a first step of determining whether the control signal is continuously input from the key button mounted on the front mask of the television receiver or the key button of the remote control; A second step of determining whether the control signal is the same control signal when the control signal is continuously input in the first step; A third step of detecting a time interval between each control signal when it is determined that the same control signal is continuously input in the second step, and determining whether the detected time is smaller than the reference time by comparing the detected time with the reference time; And when it is determined that the same signal is input within the reference time in the third step, an abnormality is detected at the contact portion of the key button, and the controller performs only one time after the control signal is first input from the television system. And a fourth process of ignoring the same signal so as not to be performed.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a preferred embodiment of a key input confirmation method for a television according to the present invention will be described in detail with reference to the accompanying drawings.

First, the configuration of a general television receiver will be described.

2 is a block diagram of a general television receiver to which the present invention is applied, in which reference numeral 1 denotes an antenna, and 2 denotes an amplification of a radio frequency signal (hereinafter referred to as RF) received through the antenna 1. 3 denotes an RF amplification unit, and 3 denotes an intermediate frequency by mixing the radio frequency signal output from the RF amplification unit 2 and the oscillation frequency signal output from the local oscillation circuit 17 to be described later. The first mixer outputs a signal.

Further, reference numeral 4 denotes an IF amplifier section for amplifying the intermediate frequency signal output from the first mixer 3, and 5 denotes an image intermediate frequency signal PIF in the intermediate frequency signal output from the IF amplifier section 4. And a P / S separator for separating the voice intermediate frequency signal SIF, and 6 represents a voice detector for detecting a voice signal from the voice intermediate frequency signal SIF output from the P / S separator 5. 7 denotes an image detector for detecting an image signal from an image intermediate frequency signal PIF output from the P / S separator 5.

In addition, reference numeral 8 denotes a remote controller device which allows the viewer to select a desired channel or to select each mode of the television, that is, a TV / AV mode, and 9 denotes an infrared signal from the remote controller device 8. 10 denotes a receiver for converting an ordinary code signal, 10 denotes a channel memory in which predetermined channel data is stored, and 11 denotes a microprocessor that controls the entire system according to an input signal from the remote controller device 8.

In addition, reference numeral 12 denotes a screen display for overlapping and outputting a character or a picture on a screen on which a broadcast signal is output separately from the broadcast signal according to the control signal of the microprocessor 11 (On Screen Display). (Hereinafter referred to as OSD), and 13 denotes a PWM generator for generating a predetermined pulse width modulation (PWM) signal according to a control signal from the microprocessor 11, and 14 denotes the above. An integration circuit for integrating the PWM signal output from the PWM generator 13 to generate a predetermined level signal is shown.

Here, when the viewer selects a predetermined channel by using the remote controller device 8, the microprocessor 11 reads out channel data corresponding to the channel selected by the viewer from the channel memory 10 and then based on the selected channel. By controlling the PWM generator 13 to generate a predetermined PWM signal, the PWM signal is output as a voltage control signal corresponding to the channel selected by the viewer through the integrator circuit 14.

In addition, reference numeral 15 is provided for a precise tuning operation, and represents an Auto Fine Tunning circuit (hereinafter referred to as AFT) circuit 15, and 16 represents a voltage signal applied from the integrating circuit 14; An adder for adding a voltage signal applied from the AFT circuit 15 is shown, and 17 represents a local oscillating circuit for outputting a predetermined oscillation frequency.

In addition, reference numeral 18 controls the amplification degree of the above-described RF amplifier 2 and the IF amplifier 4 based on the level of the image signal detected by the image detector 7, thereby detecting the image detector ( Figure 7 shows the Automatic Gain Control (AGC) circuit that controls the video signal output level from 7).

On the other hand, reference numeral 19 denotes an external AV device such as a VCR or a laser disc player, and 20 denotes the voice detector 6 and the image detector 7 according to the switching signal from the microprocessor 11 described above. A first switching section for selectively outputting audio and video signals from and external audio and video signals from the external AV device 19 is shown.

Although reference numeral 23 is not shown for the image signal output from the first switching unit 20, the color, tint, and brightness are in accordance with the control signal from the microprocessor 11. A video processing unit which processes (Brightness) and the like and outputs R (Red), G (Green), and B (Blue) signals corresponding to the video signal.

The RGB signal output from the image processor 23 is output by mixing RGB and OSD blanking signals Y ′, which are output signals of the OSD generator 12 described above, in the second mixer indicated by reference numeral 24. Reference numeral 25 denotes a CRT driving unit for driving the CRT based on the RGB signal output from the mixer 24.

In addition, reference numeral 21 denotes a base, treble, and volume according to a control signal from the microprocessor 11 although not shown for the voice signal output from the first switching unit 20. A voice processing unit for executing voice processing such as a volume), and 22 denotes a voice amplifying unit for amplifying and outputting the voice signal processed by the voice processing unit 21 to a speaker.

The above objects and various advantages of the present invention will become more apparent from the preferred embodiments of the invention described below with reference to the accompanying drawings by those skilled in the art.

Hereinafter, a key input confirmation method of a television according to the present invention will be described with reference to FIG. 3.

3 is a flowchart for explaining a key input confirmation method of a television.

Referring to FIG. 3, first, the microprocessor of the television system determines whether a control signal is input from a key button mounted on the front mask of the television receiver or a key button of the remote controller.

In this case, when it is determined that the control signal is not input in step S1, the television system maintains the standby mode (S2). When it is determined that the control signal is input in step S1, it is determined whether the control signal is continuously input. (S3)

If it is determined in step S3 that the control signal is not continuously input, the control signal input in step S1 is performed. (S4) In addition, if it is determined in step S3 that the control signal is continuously input, the control signal is inputted. It is determined whether is the same control signal (S5).

If it is determined in step S3 that the control signal is not the same control signal, the process proceeds to step S4 to perform the input control signal, and if it is determined in step S3 that the control signal is the same control signal, the continuously input control signal The time interval of is detected. (S6)

Thereafter, the detected time interval is compared with a predetermined reference time to determine whether the detected time is smaller than the reference time. (S7) In this case, if the detected time is larger than the reference time, the user recognizes it as a control signal desired by the user. Proceeds to S4 to perform all the input control signals, and if the detected time of the determination result of step S7 is less than the reference time, it is confirmed that an abnormality has occurred at the contact portion of the key button, and the control signal is generated only once in the television system. After that, the same signal within the reference time is ignored and not performed (S8).

As described above, the key input confirmation method of the television of the present invention determines that an abnormality has occurred in the tact switch contact part when the same control signal is input several times within a predetermined reference time, so that only one time is performed. It has the effect of being able to make precise adjustments.

While the invention has been shown and described with respect to particular embodiments, it will be apparent to those skilled in the art that various modifications and variations can be made without departing from the spirit and scope of the invention as set forth in the claims. Anyone can see it easily.

Claims (1)

A first step of determining whether a control signal is continuously inputted from a key button mounted on the front mask of the television receiver or a key button of the remote control; A second step of determining whether the control signal is the same control signal when the control signal is continuously input in the first step; A third step of detecting a time interval between each control signal when it is determined that the same control signal is continuously input in the second step, and determining whether the detected time is smaller than the reference time by comparing the detected time with the reference time; And In the third process, when it is determined that the same signal is input within the reference time, it is confirmed that an abnormality has occurred at the contact portion of the key button, and only once is performed when the control signal is first input from the television system. And a fourth step of ignoring the signal so as not to be performed.