GB2366058A

GB2366058A - Power saving in a remote-controllable electronic appliance

Info

Publication number: GB2366058A
Application number: GB0127007A
Authority: GB
Inventors: Jae-Kyung Lee; Jeong-Soo Choi
Original assignee: LG Electronics Inc
Current assignee: LG Electronics Inc
Priority date: 1997-11-19
Filing date: 1998-11-10
Publication date: 2002-02-27
Anticipated expiration: 2018-11-10
Also published as: GB2366058B; GB2366059B; GB0127007D0; GB2366059A; GB0127009D0

Abstract

A remote-controllable electronic appliance (e.g. TV) can call its remote controller, to make a sound to enable the user to find the remote controller. A power saving circuit for the appliance includes a microcomputer 102 for outputting the remote controller call identification while activating and outputting an enable signal for a predetermined time period by recognizing the pushing of the remote controller call button on a key input 101, a call signal transmitter 110 for transmitting to the remote controller a resultant signal by amplifying and modulating the remote controller call identification signal provided from the microcomputer 102, and a power source control unit 111 which is operated in accordance with the enable signal and provides an external voltage to the call signal transmitter 110.

Description

<Desc/Clms Page number 1> METHOD FOR ASSIGNING A REMOTE CONTROLLER IDENTIFICATION CODE AND POWER-SAVING ELECTRONIC APPLIANCE AND REMOTE CONTROLLER USING THE METHOD BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a field of a remote controlling system between an electronic appliance and remote controller in which the electronic appliance can call its remote controller and, more particularly, to an improved method for automatically assigning an call identification code corresponding to each remote controller and calling the remote controller and also an power saving remote controller and electronic appliance capable of decreasing power consumption by using the method.

2. Description of the Background Art In general, an electronic apparatuses such as television sets, audio systems and other various electronic systems have an private remote controller corresponding to them. It is current tendency to assign various operational functions of an electronic apparatus to the corresponded remote controller for user's convenience.

Such remote controller, however, is usually so small-sized, so that it may easily get lost and it frequently occurs that the user does not remember where it was placed. In order to easily find the remote controller, a method has been introduced in which the user pushes a remote controller call key attached at a

television set and then transmits a remote controller call signal in space. When the remote controller receives the call signal, it makes an answer sound, thereby enabling the user to find its location.

Figure 1 is a block diagram illustrating a general remote controlling system including a remote controllable television set and its remote controller.

As shown, a television set portion 10 related to a remote controller includes a TV microcomputer 11, a remote controller call signal transmitter 12 and an infrared receiver 13. Also, there is provided a remote controller call key button to facilitate the finding of the remote controller in case the user does not remember where it was placed. The remote control call button is connected to the TV microcomputer 11.

When the remote controller can't be easily found, the user inputs the remote controller call key through its key button disposed at the television set. In response to it, TV microcomputer 10 transmits a remote controller call signal via the remote controller call signal transmitter 12 into the space.

The remote controller 20 includes microcomputer 21, a remote controller call signal receiver 22, a key matrix 23, an infrared emitter 24 and an answer sound generator 25. When the call signal receiver 22 of the remote controller 20 receives a remote controller call signal outputted from a remote controller call signal transmitter 12 in the television set, the remote controller call receiver 22 notifies that fact to the microcomputer 21. Then, the microcomputer 21 generates an answer sound through the answer sound generator 25, such as "beep", so that the user can listen to the sound and find the remote controller.

At this time, a random key input of the key matrix 23 in the remote controller by the user is understood as the user has found the remote controller,

so that the answer sound generator 25 is controlled to halt its sound generation. With the key input of the remote controller by the user, the microcomputer 21 of the remote control 20 outputs a command code corresponding to the input key signal through the infrared emitter 24. The infrared receiver 13 of the television set receives the command code from the remote controller 20 and notifies it to the microcomputer 11. Accordingly, the microcomputer 11 carries out its function in accordance with the command code applied thereto.

Such remote controller call method is advantageous when there is provided only a single television set. However, when a plurality of same kinds of television sets are installed in one household or a television set in one household is the same model as its next door neighbor's, the remote controller call signal generation from one television set may cause a plurality of remote controllers to make answer sounds at the same time or cause a different remote controller other than the user's to respond thereto.

Further, in case that the remote controller call function is applied to a television set, the remote controller should be continuously supplied by electrical power so as to be ready to generate an answer sound at a random call from the television set, thereby significantly increasing battery consumption of the remote controller and the electronic appliance.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a method for automatically assigning a remote control call identification code, wherein an only desired remote controller can be called using an automatic identification code assignment,

thereby calling the remote controller.

It is other object of the present invention to provide a remote controller which is capable of decreasing its battery consumption through using the method. It is another object of the present invention to provide an electronic appliance, which is provided together with a corresponding remote controller, capable of decreasing its power consumption through using the method.

It is still another object of the present invention to provide a remote controlling system including an electronic appliance and a remote controller effectively utilizing electrical power, thereby decreasing its power consumption.

To achieve the above-described objects, there is provided a method for assigning a remote controller identification code. The method comprises a step for setting a second remote controller identification code different from a first remote controller identification code set in the electronic appliance; a step for requesting a reset of the remote controller call identification code by the remote controller having the first remote controller identification code; and a step for replacing the first remote controller identification code in the electronic appliance with the second remote controller identification code in response to the request.

Further, to achieve the above-described objects, there is provided a method for assigning a remote controller identification code and calling the remote controller. The method comprises a step for setting a second remote controller identification code different from a first remote controller identification code which is set in the electrical appliance; a step for requesting a reset of the remote controller identification code by the remote controller having the first remote controller identification code; a step for replacing the first remote controller identification code in the electronic appliance with the second remote controller

identification in response to the request and resetting the replaced value as the identification code to the remote controller; a step for calling the remote controller by transmitting a remote controller call signal in accordance with the identification code from the electronic appliance having an identification code identical to the set identification code; a step for receiving the remote controller call signal; a step for comparing whether the identification code detected from the remote controller call signal corresponds to one set in the remote controller; and a step for generating an answer sound when the identification codes correspond to each other.

Still further, to achieve the above-described objects, there is provided an electronic appliance and remote controller having a function of assigning a remote controller identification code wherein the electronic appliance comprises a rewrite memory means disposed in the electronic appliance and for storing therein a first remote controller identification code; a memory means disposed in the electronic appliance and for generating and temporarily storing therein a second remote controller identification code different from the first remote controller identification code; a transmission means for transmitting the first remote controller identification code when calling the remote controller, and transmitting the second remote controller identification code the remote controller in response thereto when the remote controller having the first remote controller identification code has requested a reset of the remote controller call identification code; and an electronic appliance control means for replacing the first remote controller identification code in the electronic appliance with a second remote controller identification, storing the replaced value in the rewrite memory means so as to reset the same into the remote controller as the identification code, and controlling

the remote controller call transmission means and the respective memory means. Also, the remote controller comprises a remote controller call signal reception means; means for transmitting the remote controller identification code reset request signal when the remote controller is initialized; a memory means for storing therein the first remote controller identification code, and storing therein the second remote controller identification code instead of the first remote controller identification code when the second remote controller identification code is received from the electronic appliance through the remote controller call signal reception means after being requested to reset the remote controller identification code; and a remote-controller control means for comparing the remote controller identification code stored into the memory means, controlling to generate the answer sound and controlling the transmission means and the memory means, in response to the remote controller call.

Also, to achieve the above-described objects, there is provided a remote controller having a function of assigning a remote controller identification code. The remote controller comprises a call signal reception means for detecting a remote controller call signal transmitted having the remote controller identification code from the electronic appliance; a control means for controlling to respond only when the detected identification code and the previously set identification code are identical to each other; and a means for activating the call signal reception means only when the identification code is possible to identify from the electronic appliance, in response to the control means, wherein the control means controls the activation means and the call signal reception means has a periodic activation period.

In order to further achieve the above-described objects, there is provided

an electronic appliance having a function of assigning a remote controller identification code. The electronic appliance comprises a remote controller call signal transmission means for transmitting a remote controller call signal having the remote controller identification code during a predetermined time period so as to call the remote controller; and a control means for activating the remote controller call signal transmission means only during the call signal transmission period in 'response to the remote controller call.

The object and advantages of the present invention will become more completely disclosed and described in the following specification, the accompany drawings and the appended claims.

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a block diagram illustrating a general remote controlling system including a television set and its remote controller; Figure 2 is a flow chart illustrating an operation of the television set for assigning an identification code to a remote controller which corresponds to the television set according to the present invention; Figure 3A is a flow chart illustrating an operation of the remote controller for assigning a call identification code according to the present invention; Figure 313 is a flow chart illustrating answering steps to the remote controller call according to the present invention; Figure 4 is a block diagram illustrating a circuit for controlling the remote controller by the television set; Figure 5 is a block diagram illustrating a circuit for a power-saving remote

controller according to the present invention; Figure 6 is a circuit view detailing a first power control unit in the circuit of Fig. 4; Figure 7 is a circuit view detailing a second power control unit in the circuit of Fig. 5; Figure 8A is a timing diagram of an identification signal; Figure 8B is a timing diagram of an enable signal applied to the first power control unit; Figure 8C is a timing diagram of an identification signal outputted from a call signal receiver; and Figure 8D is a timing diagram of an enable signal applied to the second power control unit.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Figure 2 is a flow chart illustrating an operation of a television set for assigning an identification code to a remote controller which corresponds to the television set, Figure 3A is a flow chart illustrating an operation of the remote controller for assigning a call identification code, and Figure 3B is a flow chart illustrating answering steps to the remote controller call, respectively, according to the present invention.

It is noted that Figure 1, which shows a general remote controlling system, is referenced in order to illustrate a method for assigning a call identification code according to the present invention.

At step 201 in Figure 2, in case that a user can't remember where a remote

controller for remote controlling a television set is, the television set is powered on manually . If user has the remote controller the television set is powered on by user's manipulation of the remote controller. Then, the microcomputer 11 becomes reset.

At step 202, the microcomputer 11 reads a remote controller call identification code serving as a first remote controller code from a rewrite memory (not shown) such as EEPROM. The read remote controller identification code is temporarily stored in a storage member such as register, temporary memory and flag. The storage member is set as variable Y for a convenient illustration, and thus the read call identification code is stored in variable Y (step 203).

At step 204, it is checked whether there is a reset request of the call identification code from the remote controller. In case that the television set is powered on without using the remote controller, the result of step 204 will become "No". In case that the remote controller is used to turn on the television set, a command with regard to the reset request of the call identification code is automatically generated from the remote controller, and the television set receives the result, thereby step 204 turns out "Yes". A further detail will be described later.

When a reset request of the call identification code is determined not to have been received through the remote controller, that is, the result of step 204 is "NO", the variable Y is increased per a predetermined time in the television set at step 205. The variable Y is utilized as second remote controller identification code which is different from the first remote controller identification code. At this time, the increased value Y is compared to threshold value at step 206. If the increased value Y is equal to or larger than the threshold value, the variable Y is

reset as "0", and if it is less than the threshold value, the step 206 is directed to step 211.

At steps 205 through 207, the television set automatically assigns an s;@entification code to the remote controller, wherein the threshold value is set by a designer at a random value, for example, at 10, 20, 30 or 100, depending upon television set makers or models. Also, at steps 205-207, the increase of variable Y can be carried out at each predetermined time period by one ("1") or by an equivalent value of required amount. This object is for a generation of different identification codes. The generation may be occurred in sequence or at random.

Step 211 checks whether the remote controller call key is inputted. In case the television set is controlled by the remote controller, the flow proceeds to step 212 to perform other functions of the television because there is no remote controller call key input at step 211, However, when the television set is manually turned on, the user is supposed to manipulate the remote controller call key attached at the television set. Consequently, step 211 results in "Yes" and succeeds to step 213 at which the television set transmits the first remote controller call identification code stored in the rewrite memory into space.

In case that the remote controller call identification code stored in the rewrite memory is transmitted into space to find the remote controller at step 213, the transmitted identification code is received by the remote controller, thereby the remote controller is supposed to perform the process shown in Figure 3A, which will be described in detail later.

In Figure 3B, the microcomputer 21 of the remote controller 20 checks the reception of the call identification at step 307, and when the call identification is

not received, other functions of the remote controller are performed at step 312. In the meantime, when the remote controller call identification is received through the remote controller call signal receiver 22, and the received call identification is determined to correspond to a register value B in the remote controller, it is understood that the remote controller call has been requested. Accordingly, through the answer sound generator 25, an answer sound recognizable to the user is generated for a predetermined time period so as for the user to find the remote controller at step 309.

At this time, when the user pushes of the key matrix 23 of the found remote controller 20 at step 310, the microcomputer 21 controls the answer sound generator 25 to thereby interrupt the generation of the remote controller answer sound at step 311, thereby performing. other functions of the remote controller at step 312.

Accordingly, since the user who has found the remote controller will begin manipulation of the remote controller, the television set checks whether a predetermined infrared signal is applied thereto from the remote controller as described at steps 214 in Figure 2. This is the case in which the user has found the remote controller so that the television set halts the transmission of the remote controller call identification code.

At step 214, if a signal is not received from the remote controller, step 214 proceeds to step 215 so as to check whether a predetermined time has lapsed. If it is determined that the predetermined time has not lapsed and that the infrared signal has not been received, the remote controller call identification code is continuously transmitted into space. Although the infrared signal has not been received, when a predetermined time has lapsed, it is understood that the remote

controller has not been found or that some kind of errors have occurred, thereby halting the transmission of the remote controller call identification code. Then, the step proceeds to step 212 for carrying out other functions of the television set.

Therefore, only the remote controller corresponding to the television set is called according to the present invention.

Now, there will be described a resetting demand of the call identification code from the remote controller at step 204. This relates to a state in which a battery for the remote controller is mounted in the remote controller or a new battery is replaced with old one.

As shown in Figure 2 and 3A, when power is supplied into the remote controller 20 by a battery replacement at step 301, the microcomputer 21 in Fig. 1 becomes reset and has its power supply halted and at the same time, the remote controller call identification code becomes automatically erased, so that the microcomputer 21 transmits a command code demanding a resetting of the call identification through the infrared emitter 24 to the television set in the form of infrared ray at step 302. Then, the infrared receiver 13 of the television set 10 receives the infrared ray released from the infrared emitter 24 of the remote controller and it is notified to the microcomputer 11 which in turn decodes the data to thereby recognize the call identification reset command from the remote controller 20 at step 204. That is, when the call identification reset command is received from the remote controller, the microcomputer 11 of the television set recognizes that an electrical power is newly supplied for the remote controller 20 and that the remote identification is deleted. At steps 205 through 207, variable Y which varies each predetermined time period is reset as the call identification serving as second remote controller identification code, and the call identification

is stored in a rewrite memory at step 209.

The stored remote controller call identification is transmitted to the remote controller 20 for a predetermined time at step 210. Therefore, the remote controller 20 transmits the call identification reset command in the form of infrared ray. When the call identification is received while checking the reception thereof at step 303, the received call identification is decoded at step 304 and the decoded value is stored in the register B within the remote controller at step 305. Then, the reset of the remote controller call identification is notified by generating the remote controller response sound through the response sound generator 25 for a predetermined time.

Hereinafter, a power saving remote controller and electronic appliance capable of decreasing their battery consumption effectively with using the above method will be described.

As shown in Figure 4, the power saving circuit for the television set according to the present invention includes a television microcomputer 102 for outputting the remote controller call identification while activating and outputting an enable signal EM for a predetermined time by recognizing the pushing of the remote controller call button on a key input unit 101, a call signal transmitter 110 for transmitting to the remote controller a resultant signal by amplifying and modulating the remote controller call identification signal provided from the microcomputer 102, and a first power source control unit 110 for being operated in accordance with the enable signal EM and providing an external voltage supplied through a source terminal B+ to the call signal transmitter 110.

In case the remote controller call is not required, the call signal transmitter 110 does not need to be operated, so that a source enable signal is outputted by

becoming inactive to "high" at the enable terminal EN1 of the television microcomputer 102. Accordingly, the switch SW1 of the first power source control unit 111 becomes opened (turn-off). As a result, the power is not provided to the call signal transmitter 110, thereby deactivating the transmitter 110.

However, when the call button provided on the key input unit 101 of the television set so as for the user to find the remote controller, the microcomputer 102 recognizes the key signal, and the source enable signal becomes activated to "low" through the enable terminal EN1. Accordingly, the switch SW1 of the first source control unit 111 becomes turned on so that the external power source provided through the source terminal B+ is supplied to the source terminal Vcc of the call signal transmitter 110 through the switch SW1, thereby switching the call signal transmitter 110 to its operational state.

At this time, the microcomputer 102 outputs the identification signal which is set toward the call signal transmitter 110 through the output port P. With reference to Figure 2, this can be the same signal as the identification signal as described above.

The identification signal, as shown in Figure 4, is amplified to an appropriate level by the amplifier 103 of the call signal transmitter 110 and frequency-modulated, for example, to 16.620MHz in accordance with the FM modulator 104. The FM modulated signal is converted to a radio frequency RF through the radio frequency oscillator 105 and the buffer 106, and then multiplied to a frequency of about 50MHz by the frequency multiplier 107. The multiplied signal is transmitted through the radio frequency amplifier 108 such that it is adjusted to an appropriate gate through the gain adjuster 109 and transmitted through the transmission antenna ANT1.

The preferred embodiment of the present invention with regard to the composition of the switch SW1 schematically illustrated in Figure 4 will now be described with reference to Figure 6.

When the source enable signal becomes active to "low" at the enable terminal EM of the television microcomputer 102, the transmitter Q2 is turned off. Accordingly. the external voltage supplied through the source terminal B' is charged in the condenser C1 through the resistance R1. The charged voltage is provided to the base of the transistor 01 through the resistance R2 to thereby turn on the transistor Q1, whereby the charged voltage is provided to the source terminal Vcc of the call signal transmitter 110 through the transistor Q1 and the condenser C2.

However, when the source enable signal becomes inactive to "high" at the enable terminal EN1 of the microcomputer 102, the transistor Q2 is turned on. Accordingly, the transistor Q1 is turned off so that voltage is not provided to the source terminal Vcc of the transmitter 110.

Figure 8B is a timing diagram showing an operational time of the call signal transmitter 110 in accordance with the enable signal outputted from the television microcomputer 102, and Figure 8A is a timing diagram showing a wave form of the identification signal continuously outputted from the microcomputer 102 during the operational time period. The wave forms are also understood to express random numbers as illustrated in Figure 2. Likewise, at a time point of call button pushing, the power source is received for a predetermined time period to thereby operate the call signal transmitter 110.

Figure 5 is a composition view of the power saving remote controller according to the present invention. As shown therein, the power saving remote

controller includes the call signal receiver 209 fro detecting an original remote controller call identification signal by amplifying and demodulating the call signal outputted from the television call signal transmitter 110, a remote control microcomputer 210 for driving the speaker SP for a corresponding time period when is coincided after the comparison of the detected identification and the previously stored identification and activating the enable signal EN2 to a predetermined pattern so as to operate the call signal receiver 209 to a power saving mode, and a second source control unit 211 for being driven by the enable signal EN2-and supplying a battery voltage through the source terminal Vcc to the call signal receiver 209.

The reflection wave signal transmitted through the transmission antenna ANT1 of the television call signal transmitter 110 is received through the remote control reception antenna ANT2 and amplified to an appropriate level by the amplifier 201 and then provided to the mixer 202.

The mixer 202 mixes the applied reflection wave signal and an oscillation signal (for example, 49.402MHz) supplied from the oscillator 203. The output signal of the mixer 202 -is filtered by the ceramic filter 204 and confined to a predetermined amplitude by the limiter 205.

A predetermined amplitude of signal outputted from the limiter 205 is provided to the demodulator 206 and accordingly the original call signal is restored. A low frequency call signal outputted from the demodulator 206 is amplified to an appropriate level through the amplifier 207 and filtered by the filter 208, from which the original identification signal is detected. The thusly detected identification signal is transferred to the remote control microcomputer 210 through the output port P1. Then, the microcomputer 210 compares the

identification detected through the processing steps as described above in the call signal receiver 209 with one stored in the register B in Figure 3 which is previously set, and if compared identical, through the output port P3 to the speaker SP is outputted a predetermined frequency of signal for a predetermined time period. Accordingly, the user can easily find the remote controller in response to the sound.

At this time, the microcomputer 210, in order to prevent a battery expectancy of the remote control from being decreased by its continual operation, controls the second source control unit 211 in Figure 5 to the same cycle as that in Figure 8D, whereby the battery source Vcc provided to the call signal receiver 209 is opened or closed to a corresponding cycle. Therefore, the call signal receiver 209 periodically turns on, off its operation, and during its turn-on period the receiver 209 becomes operated so that the call signal outputted from the television set can be detected. For instance, if a call signal for searching the remote controller is to be outputted for 13 seconds in the television set, with the repetition of .a step at which the receiver of the remote controller is operated for 40-60ms and the power supply is interrupted for 5 seconds, the call signal is sufficiently detected.

When the source enable signal at the enable terminal EN2 of the remote control microcomputer 210 is outputted by becoming active to "low", the transistor Q4 is turned off accordingly, and the transistor Q3 is turned on. Therefore, the battery voltage supplied through the source terminal Vcc is provided to the source terminal Vcc of the call signal receiver 209 through the resistance R4, the transistor 03 and the condenser C5.

However, when the source enable signal at the enable terminal EN2 of the

remote control microcomputer 210 is outputted by becoming inactive to "high", the transistor Q4 s turned on and accordingly the transistor Q3 is turned off, whereby the battery voltage to the source terminal Vcc of the receiver 209 becomes halted.

Consequently, the, microcomputer 210, in order to prevent the battery power of the remote controller from being inadvertently discharged, as shown in Figures 8C and 8D, outputs a "low" signal to the second source control unit 211 during a time period (for example 40-60ms) to the extent that, for example, two identification signals can be detected, so that the. call signal receiver 209 is driven thereduring, and then a "high" signal is outputted for 5-10 seconds so as to stop the operation of the call signal receiver 209. Then, during a time period (50-60ms) to the extent that two identification signals can be detected, a "low" signal is outputted to the second source control unit 211, thereby operating the call signal receiver 209 thereduring.

Accordingly, the call signal receiver 209 detects the identification signal and is operated form a least time period so that the battery power consumption becomes significantly decreased as compared to that of the conventional art.

According to the present invention, a proper identification is assigned to the remote controller through the television set so that it is possible to d-all only a corresponding remote controller without interruption during the remote controller call. Also, while continuously varying the call identification in the television set each predetermined time, if the remote controller demands the reset of the call identification, the call identification at the time point is automatically set, thereby providing a significant convenience to the user as well as assigning different call identifications to its kinds of other models.

Further, in the present invention, the power is provided to the call signal

transmitter disposed in the television set for a limited time period from a reference time point at which the remote controller identification button is pushed by the user, and the power is supplied to operate the call signal receiver for a very short time period in the remote controller, thereby significantly elongating the battery expectancy as compared to the conventional case in which the call signal receiver is always kept at a standby mode.

As the present invention may be embodied in several forms without departing from the spirit of essential characteristics thereof, it should also be understood that the above-described embodiments are not limited by any of the details of the foregoing description, unless otherwise specified, but rather should be construed broadly within its spirit and scope as defined in the appended claims, and therefore all changes and modifications that fall within meets and bounds of the claims, or equivalences of such meets and bounds are therefore intended to embrace the appended claims.

Claims

CLAIMS: 1. An electronic appliance having an assignable remote controller identification code wherein a remote controller responds to a remote controller call from the electronic appliance in accordance with a remote controller identification code thereof transmitted from the electronic appliance which electronic appliance is operable by the remote controller, said electronic appliance comprising: a microcomputer for outputting the remote controller identification code while activating and outputting an enable signal for a predetermined time by recognizing the pushing of a remote controller call button on the electronic appliance; a call signal transmitter for transmitting to the remote controller a resultant remote controller call signal by amplifying and modulating the remote controller identification signal provided from the microcomputer; and a power source control unit for being operated in accordance with the enable signal and providing an external voltage supplied through a source terminal to the call signal transmitter.
2. An electronic appliance having a function of assigning a remote controller identification code substantially as hereinbefore described with

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reference to and as shown in Figs. 2 to 8 of the accompanying drawings.