KR19990034475A - Distance sensing device and method using remote controller - Google Patents

Abstract

And more particularly to a remote control for transmitting a command code according to a key input of a remote controller in an infrared form and transmitting an ultrasonic wave for sensing a distance when the transmission of an infrared command code is completed, It is composed of a TV body that calculates the viewing distance by checking the time from reception of the infrared command code to the completion of ultrasonic reception, and controls the state of the TV according to the viewing distance. The ultrasonic transmitter is installed on the remote controller and the ultrasonic receiver is installed on the TV side to calculate the viewing distance between the person and the TV by calculating the time until the ultrasound signal arrives after receiving the command control code by the infrared signal, By performing the operation, it is possible to precisely detect the distance between the person and the TV.

Description

Distance sensing device and method using remote controller

BACKGROUND OF THE INVENTION 1. Field of the Invention [0002] The present invention relates to a sight-viewing television (TV), and more particularly, to a distance sensing apparatus and method using a remote controller for transmitting ultrasound waves from a remote controller and receiving the signals from a TV.

Generally, in a TV, the human body, especially the harmful electromagnetic waves, is generated, so if you watch the TV at a very short distance, it may deteriorate the visual acuity. To prevent this, the Sight Protection TV prevents a decrease in the visual acuity caused by the TV by giving a warning such as turning off the TV automatically or adjusting the screen brightness when the distance between the person in front of the TV and the TV approaches a predetermined distance.

1, a TV microcomputer 11 for calculating and controlling a distance between a TV and a person, an ultrasonic wave generator 12 for generating ultrasonic waves, and an ultrasonic generator And an ultrasonic receiver 13 for receiving ultrasonic waves generated by the ultrasonic wave generator 12 and reflecting the ultrasonic waves generated by the ultrasonic generator 12 to the TV microcomputer 11.

The conventional vision protection TV configured as above generates ultrasonic waves from the ultrasonic wave generator 12. If there is a person in front of the TV, the ultrasonic waves transmitted from the ultrasonic wave generator 12 are reflected from a person and are received by the ultrasonic wave receiver 13. The ultrasound receiving unit 13 informs the TV microcomputer 11 that the ultrasound is received.

Then, the TV microcomputer 11 calculates the viewing distance between the TV and the person by checking the time at which the current response has been received since the transmission of the ultrasonic signal. That is, if the ultrasonic wave generated by the ultrasonic wave generator 12 is reflected and returned for a time of tmsec, the time required for the distance to the person is half that of the ultrasonic wave, .

At this time, since the velocity of the ultrasonic wave is 340m / sec per second, the distance X that a person is viewing is obtained by the following equation (1).

Therefore, if the distance X (m) viewed by the person is larger than a preset value in the TV microcomputer 11, the TV microcomputer 11 does not perform any control, and if it is smaller than the preset value, The microcomputer 11 performs control operations such as turning off the power of the TV or changing the screen brightness according to the viewing distance.

However, in the related art, since the ultrasonic transmission unit for distance sensing and the ultrasonic receiving unit are both provided on the TV side, if there is a table or an obstacle in front of a person watching the TV, the distance from the table or the obstacle The distance between the viewer and the TV can not be precisely detected, and thus the TV state can not be properly controlled.

An object of the present invention is to provide an ultrasound system and a method for controlling the ultrasound system and a method of controlling the ultrasound system, And a distance sensing device and method using a remote controller for calculating the viewing distance between the TV and the TV.

According to another aspect of the present invention, there is provided a distance sensing apparatus using a remote controller, wherein the ultrasonic transmission unit is mounted on a remote controller and the ultrasonic receiver unit is mounted on a TV, and a command code corresponding to a key input of the remote controller is transmitted in an infrared form, A remote controller for transmitting an ultrasonic signal for calculating a distance when the infrared signal is received, and a television for measuring the time from arrival of the infrared signal from the remote controller to arrival of the ultrasonic signal and converting the time to the viewing distance.

A distance sensing method using a remote controller according to the present invention includes transmitting a command code according to a key input of a remote controller in an infrared form and transmitting ultrasonic waves for sensing a distance when the infrared command code is transmitted, And receiving the infrared command code transmitted in the step of receiving the infrared command code, and checking the time from completion of the reception of the infrared command code to the completion of the reception of the ultrasonic signal to calculate the viewing distance.

Figure 1 is a block diagram of a conventional distance sensing device

2A is a block diagram illustrating a distance sensing apparatus according to the present invention;

2B is a diagram showing the relationship between the TV and the remote controller;

3 is a flowchart showing an operation process of the remote controller according to the present invention.

4 is a flowchart illustrating an operation procedure of a TV according to the present invention.

DESCRIPTION OF THE REFERENCE NUMERALS

21: remote control receiver 22: ultrasonic receiver

23: TV Micom

31: Key Matrix 32: Remote control microcomputer

33: Infrared light emitting part 34: Ultrasonic wave emitting part

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

FIG. 2A is a block diagram of a distance sensing apparatus using a remote controller according to the present invention, and FIG. 2B is a diagram illustrating a relationship between the TV and a remote controller.

2A, the TV includes a TV microcomputer 21, a remote control receiver 22, and an ultrasonic receiver 23. The remote controller includes a key matrix 31 having a plurality of keys arranged therein, a remote control microcomputer 32, A light emitting portion 33, and an ultrasonic wave generating portion 34.

3 is a flowchart showing the operation of the remote controller, and Fig.

In the present invention configured as described above, most of the viewers use a remote controller to control the TV when the TV is viewed, and the speed of the infrared rays is faster than that of the ultrasonic waves.

That is, since the speed of infrared rays is light, it is 3 × 10 ⁸ m / sec and the velocity of ultrasonic wave is 340 m / sec because of the sound.

Therefore, the remote controller transmits the remote control code to the infrared ray when the key is input, and transmits the ultrasonic wave to calculate the distance immediately after the remote controller code transmission is completed. The TV calculates the distance between the TV and the person by checking the input time of the ultrasonic wave until the reception of the ultrasonic wave is completed, assuming that the remote control command code of the infrared type is detected from that time.

2 to 4, the remote controller can select various types of key signals (e.g., cursor movement, selection command, operation command, and the like) through the key matrix 31. FIG. Therefore, the microcomputer 32 of the remote controller checks whether any key is input from the key matrix 31 (step 301). At this time, if the key is not inputted, the conventional remote control function is performed (step 302). If the key is inputted, the command code corresponding to the input key signal is superimposed on the carrier signal, (Step 303). When the transmission of the infrared signal is completed in step 303, ultrasound is transmitted to the space through the ultrasonic transmission sensor of the ultrasonic transmission unit 34 to calculate the viewing distance (step 304).

Meanwhile, the microcomputer 21 of the TV main unit checks whether the infrared command code of the remote controller is received by the remote control receiver 22 (step 401). At this time, if there is no infrared command code received by the remote control receiver 22, the other function of the TV is performed (step 402). If it is determined that the infrared command code is being received, the corresponding command is executed according to the command code, The register t is initialized to '0' (step 403), and it is checked whether the ultrasonic signal is received by the ultrasonic receiver 23 (step 404).

If it is determined in step 404 that the ultrasonic wave is not received by the ultrasonic wave receiver 23, the register value is incremented by one every predetermined time (step 405). That is, the ultrasound arrival time t increases to t = t + 1 every predetermined time. If it is determined in step 404 that the ultrasonic signal is received by the ultrasonic receiver 23 and the reception of the ultrasonic signal is completed, the distance from the remote controller to the TV is calculated according to the following equation (2) (Step 406). Here, tmsec is the time required for the ultrasonic signal from the remote controller to be received from the TV and is not received by the TV.

When the viewing distance is calculated, the microcomputer 21 performs a series of control operations corresponding to the viewing distance, such as turning off the power of the TV or changing the screen brightness according to the calculated viewing distance.

In the meantime, according to the present invention, not only when there is a key input from a remote controller but also a distance detection code is assigned to a remote control code, a remote control distance sensing code and an ultrasonic signal in infrared form are sequentially transmitted every predetermined time, The ultrasonic arrival time until the ultrasonic signal is received from the time point is counted to convert the viewing distance, so that the distance can be detected from time to time.

As described above, according to the distance sensing apparatus and method using the remote controller according to the present invention, in consideration of the habit of watching mostly TV with the remote controller, the ultrasonic transmitter is installed in the remote controller and the ultrasonic receiver is installed in the TV body, , It calculates the viewing distance between the person and the TV by calculating the ultrasonic signal arrival time after receiving the command control code and performs the control operation corresponding to the viewing distance so that it is possible to accurately detect the distance between the person and the TV. .

Claims (2)

A microcomputer for generating an instruction code corresponding to a key input of the key input unit and controlling transmission of an ultrasonic wave when the transmission of an infrared type command code is completed, An infrared ray emitting unit that emits the command code in an infrared ray form and an ultrasonic wave transmitter that emits an ultrasonic wave when the infrared command code is transmitted under the control of the microcomputer; A remote control receiver for receiving an infrared command code from the remote control unit, an ultrasonic receiver for receiving an ultrasonic signal, and a remote controller for controlling the remote controller to perform a command when an infrared command code is received and measuring the time until the ultrasonic signal arrives And a TV unit including a microcomputer for converting the distance into a distance. 1. A viewing distance sensing method of a TV capable of being controlled by a remote controller, Transmitting a command code corresponding to a key input of the remote controller in an infrared form, and transmitting an ultrasonic wave for detecting a distance when the transmission of the infrared command code is completed; A signal reception step of, when the infrared command code transmitted in the signal transmission step is received, calculating a viewing distance by checking a time from the reception of the infrared command code to completion of reception of ultrasonic waves; And controlling the state of the television according to the viewing distance calculated in the signal receiving step.