JPH1079989A - Remote controller - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make an exchange selection between right and left screens to be executed with an easier method than the operation of an operation key. SOLUTION: By changing the direction of a remote control transmitter 11 an exchange selection between right and left screens and the selection control of the right and left screens can be done with an easy method because a comparator circuit 16 compares the output intensity of output signals d1 and e1 which are obtained by amplifying the outputs of left and right light receiving devices 12 and 13 that receive a transmitting signal from the transmitter 11 and a discriminating circuit 17 discriminates the direction of the transmitter 11 based on the compared result of the circuit 16.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a remote control device for a two-screen television receiver which can simultaneously display two screen images.

[0002]

2. Description of the Related Art In a conventional television receiver, a two-screen television receiver capable of simultaneously displaying two screen images on a cathode ray tube has been put to practical use. Thereby, the user could enjoy two different programs at the same time.

Here, when a user watches a program on a two-screen display, when performing user control such as volume control and contrast / bright control, an operation different from the conventional one-screen display is required.

[0004] That is, if the two screens are a left screen and a right screen, when performing either of the left and right screens, the user first operates the left screen operation of the remote controller to select the screen desired to be operated. Select the screen using the keys and the right screen operation keys, and then perform the desired operation.

For example, consider the case where the volume of the right screen is controlled. In this case, the user first selects the right screen with the right screen operation key of the remote control, and then adjusts the desired volume with the volume operation key. Thus, before the user performs the operation on the desired screen, it is necessary to perform switching selection between the right screen and the left screen with the operation keys, and then perform the desired operation,
This requires two operations, which is cumbersome.

[0006]

In the control of a two-screen television receiver by the above-mentioned conventional remote control device, the right and left screens are switched and selected by an operation key before the user operates a desired screen. , And then the desired operation must be performed, which requires two operations, which is cumbersome.

An object of the present invention is to eliminate the above problems and to provide a remote control device.

[0008]

According to a first aspect of the present invention, there is provided a remote control device capable of displaying two images simultaneously.
A remote control device in a screen television receiver, comprising: a remote control transmitter for generating a transmission signal for remote control; and a transmission signal from the remote control transmitter provided on the left and right sides of the dual screen television receiver. A light receiving circuit including first and second light receivers for receiving light, respectively, and a discriminating circuit for discriminating the direction of the remote control transmitter using output signals of the first and second light receivers; Control means for individually controlling video signals displayed on the left and right sides of the two-screen television receiver in response to the determination result of the determination circuit of the circuit.

According to a second aspect of the present invention, there is provided the remote control device according to the first aspect, wherein the light receiving circuits are provided on left and right sides of the two-screen television receiver, and transmitted from the remote control transmitter. First and second light receivers for receiving signals, first and second amplifiers for respectively amplifying the outputs of the first and second light receivers, and output signals of the first and second amplifiers It is characterized by comprising a comparison circuit for comparing the intensities, and a determination circuit for determining the direction of the remote control transmitter based on the comparison result by the comparison circuit.

According to a third aspect of the present invention, there is provided the remote control device according to the first aspect, wherein the light receiving circuits are provided on left and right sides of the two-screen television receiver and transmitted from the remote control transmitter. First and second light receivers for receiving signals; first and second sampling circuits for respectively sampling output signals of the first and second light receivers and outputting sampling values; A first delay circuit that delays a sampling value from the second sampling circuit, a second delay circuit that delays a sampling value from the first sampling circuit, and a difference between a sampling value from the first sampling circuit and a delay sampling value from the first delay circuit. A first differential circuit that takes a difference between a sampled value from the second sampling circuit and a delayed sampled value from the second delay circuit. A differential circuit, a first determination circuit that determines a moving direction of the remote control transmitter using an output code of a difference signal from the first and second differential circuits, and a first determination circuit. A coordinate calculation circuit for calculating the amount of change in the direction of the remote control transmitter from the determination result and the intensity of each difference signal from the first and second differential circuits, and a calculation result from the coordinate calculation circuit. And a second determination circuit that determines the direction of the remote control transmitter by utilizing the second determination circuit.

According to a fourth aspect of the present invention, there is provided the remote control device according to the first aspect, wherein the light receiving circuits are provided on left and right sides of the two-screen television receiver, and transmitted from the remote control transmitter. First and second light receivers for receiving signals, first and second amplifiers for respectively amplifying the outputs of the first and second light receivers, and output signals of the first and second amplifiers A comparison circuit for comparing the intensities of the signals, a first discrimination circuit for discriminating the orientation of the remote control transmitter based on the comparison result by the comparison circuit, and sampling the output signals of the first and second light receivers, respectively. First and second sampling circuits for outputting values, first and second delay circuits for respectively delaying sampling values from the first and second sampling circuits, and the first and second sampling circuits. A first differential circuit that takes a difference between a sampled value from a sampling circuit and a delayed sampled value from the first delay circuit, a sampled value from the second sampling circuit, and the second delay circuit And a second differential circuit for obtaining a difference from the delay sampling value from the first and second differential circuits, and a moving direction of the remote control transmitter is determined using an output code of a difference signal from the first and second differential circuits. And a coordinate for calculating the amount of change in the direction of the remote control transmitter from the determination result from the second determination circuit, the determination result from the second determination circuit, and the strength of each difference signal from the first and second differential circuits. A calculation circuit; a third determination circuit that determines the direction of the remote control transmitter using the calculation result from the coordinate calculation circuit; and an intensity difference between output signals from the first and second light receivers. , If the intensity difference is above a certain level , The first
The direction of the remote control transmitter is determined by using the output of the determination circuit. If the intensity difference is equal to or less than a predetermined level, the direction of the remote control transmitter is determined by using the output of the third determination circuit. And a fourth discriminating circuit.

According to the first to fourth aspects of the present invention, the determination circuit of the light receiving circuit utilizes the output signals of the first and second light receivers provided on the left and right sides of the two-screen television receiver. The direction of the remote control transmitter is determined, and the video signals displayed on the left and right of the dual screen television receiver are individually controlled in response to the determination result of the determination circuit of the light receiving circuit. Screen switching can be performed in a simpler method than operating the operation keys.

[0013]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram showing a first embodiment of the remote control device according to the present invention.

In FIG. 1, reference numeral 11 denotes a remote control transmitter. The remote control transmitter 11 is adapted to remotely control a two-screen television receiver which is a main unit. A light receiving circuit 34 is provided.

A transmission signal a1 by infrared rays from the remote control transmitter 11 is received by left and right light receivers 12 and 13 located on the left and right of the two-screen television receiver 10. The directivity of the remote control transmitter 11 is strong at the center and weak at both ends.

The left and right light receivers 12 and 13 transmit a transmission signal a1
And converts them into output signals b1 and c1 of electric signals, and outputs the signals to the first and second amplifiers 14 and 15.

The first and second amplifiers 14 and 15 amplify the outputs of the left and right photodetectors 12 and 13, respectively, and supply them to the comparison circuit 16 as output signals d1 and e1, respectively.

The comparison circuit 16 compares the output intensities of the output signals d1 and e1 of the first and second amplifiers 14 and 15, and supplies a comparison output signal f1 of the comparison result to the discrimination circuit 17. The comparison circuit 16 has a hysteresis to prevent chattering.

The discriminating circuit 17 discriminates the direction of the remote control transmitter 11 based on the comparison output signal f1 from the comparing circuit 16.

In the two-screen television receiver 10, if the result of the determination by the determination circuit 17 indicates that the remote control transmitter 11 is facing right, the right screen is selected.
If the result of the determination in step 7 indicates that the remote control transmitter 11 is facing left, the left screen is selected, and thereafter, the operation of the selected screen is performed based on the operation of the operation keys of the remote control transmitter 11.

FIG. 2 is an explanatory diagram for explaining the operation by the remote control device of FIG.

In FIG. 2, the remote control transmitter 11
The intensity of the directivity of the transmission signal a1 is strong at the center and weak at both ends. Therefore, when selecting the right screen,
The light emitting unit 18 of the remote control transmitter 11 is directed to the right light receiving unit 13 of the two-screen television receiver 10.

As a result, the signal received by the right light receiver 13 is stronger than the signal received by the left light receiver 12, and the output signal c1 of the right light receiver 13 is higher than the output signal b1 of the left light receiver 12. And the comparison result of the comparison circuit 16 indicates that the output signal e1 of the amplifier 15 is higher than the output signal d1 of the amplifier 14.
The determination circuit 17 determines that the direction of the remote control transmitter 11 is right.

When selecting the left screen, the light emitting unit 18 of the remote control transmitter 11 is directed to the left light receiving unit 12 of the dual screen television receiver 10. Thus, the comparison result of the comparison circuit 16 indicates that the output signal d1 is stronger than the output signal e1, and the determination circuit 17 determines that the direction of the remote control transmitter 11 is left.

Therefore, the direction of the remote control transmitter 11 can be determined by the output of the determination circuit 17, and by changing the direction of the remote control transmitter 11, the viewer can control either the right screen or the left screen. The user can easily determine whether the right screen or the left screen is selected without using key operations. Thereby, the operability of the two-screen television receiver by the remote control transmitter can be improved.

FIG. 3 is a block diagram showing the overall configuration of a two-screen television receiver 10 provided with the light receiving circuit 34 of FIG.

In FIG. 3, the two-screen television receiver 10 uses radio frequency signals (RF signals) as a plurality of broadcast radio waves.

RF signals g1, h induced in the first and second antennas 21, 22 of the dual-screen television receiver 10
1 is supplied to first and second tuners 23 and 24, respectively. The first and second tuners 23 and 24 select the RF signals g1 and h1 based on channel switching signals i1 and j1 from the microcomputer 20, which will be described later, so that the video and audio intermediate frequencies (video and audio The signals are converted into audio IF) signals k1 and m1 and supplied to first and second video and audio signal processing circuits 26 and 27, respectively.

The first video and audio signal processing circuit 26
The video and audio IF signal k1 is amplified and detected, converted into a video signal q1 and an audio signal, and an audio signal is output to the speaker 31 and the volume is controlled by a selection signal n1 from the microcomputer 20. And controls the brightness and contrast of the video signal. The controlled video signal q1 is supplied to the first compression circuit 28 and the display selection circuit 30, respectively.

The second video and audio signal processing circuit 27
The video and audio IF signal m1 is amplified and detected, converted into a video signal r1 and an audio signal, and an audio signal is output to the speaker 32 and the volume is controlled by the selection signal p1 from the microcomputer 20. And controls the brightness and contrast of the video signal. The controlled video signal r1 is supplied to the second compression circuit 29.

The first and second compression circuits 28 and 29 compress the video signals q1 and r1, respectively, and convert them into video signals s1 and t1 for the left and right screens, respectively.
Lead to.

When the screen mode selection signal u1 from the microcomputer 20 indicates one screen, the display switching circuit 30 converts the video signal q1 from the first video and audio signal processing circuit 26 into a picture of the picture tube. 33,
When the screen mode selection signal u1 indicates two screens, the video signals s1 and t1 of the left and right screens from the first and second compression circuits 28 and 29 are combined to form a two-screen video as the picture tube 33.
To be displayed.

On the other hand, the light receiving circuit 34 comprises the left and right light receivers 12 and 13 of FIG. 1, first and second amplifiers 14 and 15, a comparing circuit 16, and a discriminating circuit 17. And a key input signal w1 is supplied to the microcomputer 20 in response to the key operation of the remote control transmitter 11 and the data signal v1 indicating the following.

The microcomputer 20 creates a channel switching signal i1, j1, a selection signal n1, p1, and a screen mode selection signal u1 based on the data signal v1 and the key input signal w1, and respectively generates the first and second tuners 2.
3, 24, first and second video and audio signal processing circuits 2
6, 27 to the display selection circuit 30.

In such a configuration, if two screens are displayed and the remote control transmitter 11 is operated to face the left screen, the left screen is selected by the data signal v1 from the determination circuit 17, The first tuner 23,
The control of the first video and audio signal processing circuit 26 becomes possible. Conversely, if the remote controller transmitter 11 is operated to face the right screen, the right screen is selected by the data v1 from the determination circuit 17, and the control of the second tuner 24, the second video and audio signal processing circuit 27 is performed. Will be possible. When the television receiver displays only one screen, the microcomputer 20 controls the first tuner 23 and the first video and audio signal processing circuit 26 irrespective of the determination result of the determination circuit 17. Works.

FIG. 4 is a block diagram showing a second embodiment of the remote control device according to the present invention.

In FIG. 4, reference numeral 41 denotes a remote control transmitter, and reference numeral 40 denotes a light receiving circuit provided in a two-screen television receiver.

The transmission signal a2 by infrared rays from the remote control transmitter 41 is received by left and right light receivers 42 and 43 located on the left and right of the two-screen television receiver 40.

The left and right light receivers 42 and 43 transmit the transmission signal a2
Is received, converted into output signals b2 and c2 of electric signals, and supplied to first and second sampling circuits 44 and 45, respectively.

First and second sampling circuits 44 and 4
Reference numeral 5 denotes output signals b2 and c2 of the left and right photodetectors 42 and 43, respectively, and supplies data signals d2 and e2 indicating left and right sampling values to the first and second delay circuits 46 and 47, respectively. Signals d2 and e2
To the first and second differential circuits 48 and 49, respectively.

The first and second delay circuits 46 and 47 delay the left and right sampled data signals d2 and e2 from the first and second sampling circuits 44 and 45 by one sampling period, respectively. Data signal f
2 and g2, the first and second differential circuits 48,
49.

The first differential circuit 48 calculates the difference between the left sampled value from the first sampling circuit 44 and the left sampled value from the first delay circuit 46, and outputs the difference data signal h2. It is supplied to the movement direction determination circuit 50 and the coordinate calculation circuit 51.

The second differential circuit 49 calculates the difference between the right sampling value from the second sampling circuit 45 and the right sampling value from the second delay circuit 47, and outputs the difference data signal i2. It is supplied to the movement direction determination circuit 50 and the coordinate calculation circuit 51.

The moving direction discriminating circuit 50 outputs the difference data signal h2, h2 from the first and second differential circuits 48, 49.
The moving direction of the remote control transmitter 41 is determined from the sign of the output of i2, and the data signal j2 of the determination result is supplied to the coordinate calculation circuit 51.

The coordinate calculation circuit 51 determines the determination result indicated by the data signal j2 from the movement direction determination circuit 50 and the data signal h from the first and second differential circuits 48 and 49.
2 and i2, the output intensity of the remote control transmitter 41
Is calculated, and the data signal k2 of the calculation result is supplied to the determination circuit 52.

The discriminating circuit 52 discriminates whether the coordinate indicated by the data signal k2 is on the left or right screen.

In the control of the light receiving circuit 40, the left screen is selected when the determination result of the determination circuit 52 indicates that the coordinates are on the left screen, and the determination result of the determination circuit 52 is on the right screen. When this is indicated, the right screen is selected, and thereafter, the operation of the selected screen is performed based on the operation of the operation keys of the remote control transmitter 41.

FIG. 5 is an explanatory diagram showing the operation of the remote control device of FIG.

In FIG. 5, it is assumed that the horizontal direction of the screen is the X axis, and the coordinates of the direction of the remote controller in the initial state where the remote controller is not operated are X0 (the center of the screen). Also, the right edge of the screen is Xright and the left edge of the screen is Xle
ft.

It is assumed that the remote control transmitter 41 is moving from right to left.

Here, the processing of the two-screen television receiver for detecting the direction of the remote control transmitter 41 and determining the operation screen will be described.

As a first step, the remote control transmitter 4
Initial setting of the coordinates on the screen in the initial state where the operation 1 is not performed.

Next, as a second step, the intensities of the right and left light receivers at two times (for example, t = t0, t = t1) are detected, and the intensities of the right and left receivers at two times are detected. , The intensity difference between the two times (ΔVXleft,
ΔVright).

Next, as a third step, the remote control transmitter 4 is determined based on the change in the output intensity of the left and right light receivers 42 and 43.
1 is determined and converted into a temporal change in intensity.

Next, as a fourth step, a coordinate X on the screen is calculated from a change in the coordinates.

Next, as a fifth step, it is determined from the coordinates X on the screen whether the remote control is facing left or right on the screen.

Next, a specific example of the operation for the first to fifth steps will be described with reference to FIG.

FIGS. 6A and 6B are explanatory diagrams showing the outputs of various circuits in the operation of FIG. 5. FIG. 6A shows the relationship between the intensity of the output of the left photodetector 42 and time, and FIG. FIG. 6C shows the relationship between the intensity difference ΔVright of the left light receiver 42 at two times and the time, FIG. 6C shows the relationship between the output intensity of the right light receiver 43 and the time, and FIG. The relationship between the intensity difference ΔVright of the light receiver 42 at two times and the time is shown.
FIG. 6E shows the calculation of the moving direction and the moving amount of the coordinates by the coordinate calculating circuit.

In the first step, the coordinate calculation circuit 5
1 assumes that the coordinates of the direction of the remote controller in the initial state where the remote controller transmitter 41 is not operated are X0 (the center of the screen). The right end of the screen is Xright, and the left end is Xleft. The coordinate X of the remote control transmitter 41 is Xrigh
It exists at t <X <Xleft.

In the second step, the left light receiver 4
2. First sampling circuit 44, first delay circuit 46
The first differential circuit 48 performs the following detection.

As shown in FIG. 6A, the intensity V0left at time t = t0 is detected.

In the process (2), as shown in FIG. 6A, the intensity V1left at time t = t1 is detected.

As shown in FIG. 6B, the difference ΔVleft between the intensity V0left at time t = t0 and the intensity V1left at time t = t1 is detected. The calculation in this case is shown below.

ΔVleft = V1left−V0left (1) The processing (4) and the processing (1) to (3) are repeated.

The right photo detector 43, the second sampling circuit 45, the second delay circuit 47, and the second differential circuit 49 perform the following detection.

In the process (5), as shown in FIG. 6A, the intensity V0right at time t = t0 is detected.

In the process (6), as shown in FIG. 6A, the intensity V1right at time t = t1 is detected.

As shown in the process (7) and FIG. 6B, a difference ΔVright between the intensity V0right at time t = t0 and the intensity V1right at time t = t1 is detected. The calculation in this case is shown below.

ΔVright = V1right−V0right (2) Processing (8) and processing (5) to (7) are repeated.

Next, in a third step, the difference ΔV left, calculated by the moving direction discriminating circuit 50 in the second step,
The moving direction of the remote control transmitter 41 is obtained using ΔVright.

The relationship between the signs of ΔVleft and ΔVright and the moving direction of the remote control transmitter 41 is as shown in the following table.

[0073]

[Table 1] Hereinafter, detection of the moving direction of the remote controller will be described with reference to Table 1, FIG. 5, and FIG.

In FIG. 6B and FIG. 6D, at time t
ΔVleft (Z1) at 1 is negative and ΔVright (Z01)
Is positive, it is estimated that the remote control transmitter 41 is moving rightward. The same applies to t = t2 and t = t3. At t = t4, transmission signal a of remote control transmitter 41
Assume that the directional peak of 2 passes through the right receiver 43 and the intensity begins to decrease. In this case, ΔVleft (Z4)
Is negative and ΔVright (Z04) is negative, it is considered that the remote control transmitter 41 maintains the previous moving direction. The same applies to t = t5.

An example of the intensity variation (ΔVleft, ΔVright) and the coordinate variation (ΔX) is represented by A as a proportional constant.

In the case of ΔVleft <0, ΔVright> 0 ΔX = A · (ΔVleft−ΔVright) (3) In the case of equation (3), it is assumed that the movement to the right is positive.

When ΔVleft> 0, ΔVright <0 ΔX = −A · (ΔVleft−ΔVright) (4) In the case of this equation (4), it is assumed that the movement to the left is negative.

When ΔVleft <0, ΔVright <0 ΔX = A · {ABS (ΔVleft−ΔVright)} (5) In the case of this equation (5), the previous movement direction is held.

FIG. 6E shows the operation according to the equations (3), (4) and (5).

Next, in a fourth step, a coordinate X on the screen is calculated from a change in the coordinates. An example of this case is shown below. In this case, it is assumed that the coordinates are restricted so that the obtained coordinates X do not extend off the screen.

Xleft <X <Xright X = X + ΔX (6) X <Xleft X = Xleft (7) Xright <X X = Xright (8) Next, in the fifth step, Equations (6), (7),
It is determined from the change in the coordinates X obtained in (8) whether the remote control is facing left or right on the screen. One example is shown below.

If X <X0, the left screen is determined.

If X> X0, the right screen is determined.

When X = X0, the state of the previous screen is maintained. However, X0 is the center of the screen.

As described above, according to the embodiment of the present invention, the first and second differential circuits 48 and 49 provide the difference between the left and right sampling values one sampling period before the left and right sampling values from the left and right sampling values. And the first and second differential circuits 4
Since the direction of the remote control transmitter 41 is determined based on the output of the difference from the signals 8 and 49, switching between the right screen and the left screen can be performed by changing the direction of the remote control transmitter 41. Selection control can be performed in a simple manner. In addition, in the embodiment of the invention shown in FIG. 1, since the absolute values of the intensities input to the right and left light receivers are compared and determined, the intensity characteristics of the light receivers must match between the left and right light receivers. In the case where the right and left intensities are close to each other, the possibility of a malfunction is high. However, in the embodiment of the invention in FIG. 4, such a problem can be solved because the movement of the remote control transmitter is detected. .

FIG. 7 is a block diagram showing a third embodiment of the remote control device according to the present invention.

In FIG. 7, reference numeral 71 denotes a remote control transmitter, and reference numeral 70 denotes a light receiving circuit provided in a two-screen television receiver.

The infrared transmission signal a3 from the remote control transmitter 71 is received by left and right light receivers 72 and 73 located on the left and right of the two-screen television receiver. The directivity of the remote control transmitter 71 is strong at the center and weak at both ends.

The left and right photodetectors 72 and 73 receive the transmission signal and convert them into output signals b3 and c3 of electric signals to output intensity difference discriminating circuit 74, first direction discriminating circuit 75, and second direction discriminating circuit. Supply to circuit 76. Output intensity difference determination circuit 74
When the difference between the output intensities of the output signals b3 and c3 is larger than a predetermined threshold value, the determination signal d3 that becomes high level is supplied to the switching circuit 77, and the difference between the output intensity of the output signals b3 and c3 is equal to or less than the predetermined threshold value. In the case of, the discrimination signal d which becomes a low level
3 is supplied to the switching circuit 77.

The first direction discriminating circuit 75 discriminates the direction of the remote control transmitter using the first and second amplifiers 14 and 15, the comparing circuit 16 and the discriminating circuit 17 of FIG. The determination signal e3 is supplied to the switching circuit 77.

The second direction discriminating circuit 76 includes the first and second sampling circuits 44 and 45, the first and second delay circuits 46 and 47, the first and second differential circuits 48 and 45 shown in FIG. 4
9, the direction of the remote control transmitter is determined using a moving direction determination circuit 50, a coordinate calculation circuit 51, and a determination circuit 52;
The determination signal f3 resulting from this determination is supplied to the switching circuit 77.

The switching circuit 77 includes an output intensity difference discriminating circuit 7
4 is high level, the determination signal e3 from the first direction determination circuit 75 is guided to the final determination circuit 78, and if the determination signal d3 from the output intensity difference determination circuit 74 is low level, The determination signal e3 from the second direction determination circuit 76 is guided to the final determination circuit 78.

The final discriminating circuit 78 changes the direction indicated by the discriminating signal e3 from the switching circuit 77 to the final remote controller transmitter 7.
1 is determined, and various circuits are controlled.

With such a configuration, the output intensity difference discriminating circuit 74, the first direction discriminating circuit 75, the second direction discriminating circuit 76, the switching circuit 77 and the final discriminating circuit 78 provide the output intensities of the output signals b3 and c3. Is larger than a predetermined threshold value, the direction of the remote control transmitter is determined using the first and second amplifiers 14 and 15, the comparison circuit 16 and the determination circuit 17 of FIG. When the difference between the output intensities is equal to or smaller than a predetermined threshold, the first and second sampling circuits 44 and 45, the first and second delay circuits 46 and 47 in FIG.
The direction of the remote control transmitter is determined by using first and second differential circuits 48 and 49, a moving direction determination circuit 50, a coordinate calculation circuit 51, and a determination circuit 52.

According to such an embodiment of the present invention, when the difference between the output intensities of the output signals b3 and c3 of the left and right photodetectors 72 and 73 is larger than a predetermined threshold value, a relatively simple signal processing diagram will be described. Since the direction of the remote control transmitter is determined using the first and second amplifiers 14 and 15, the comparison circuit 16 and the determination circuit 17, the determination can be made faster than in the embodiment of the invention of FIG. 4. .

[0096]

According to the present invention, switching between the right screen and the left screen can be selected by a simpler method than the operation of the operation keys.
Thereby, the operability of the two-screen television receiver using the remote control transmitter can be improved.

[Brief description of the drawings]

FIG. 1 shows a first example of a remote control device according to the present invention.
FIG. 2 is a block diagram showing an embodiment of the present invention.

FIG. 2 is an explanatory diagram illustrating an operation by the remote control device in FIG. 1;

FIG. 3 is a block diagram showing an overall configuration of a two-screen television receiver using the remote control device of FIG. 1;

FIG. 4 shows a second example of the remote control device according to the present invention.
FIG. 2 is a block diagram showing an embodiment of the present invention.

FIG. 5 is an explanatory diagram showing the operation of the remote control device in FIG. 4;

FIG. 6 is an explanatory diagram showing outputs of various circuits in the operation of FIG. 5;

FIG. 7 shows a third example of the remote control device according to the present invention.
FIG. 2 is a block diagram showing an embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Two-screen television receiver 11 Remote control transmitter 12, 13 Left and right light receiver 14, 15 First and second amplification amplifier 16 Comparison circuit 17 Discrimination circuit

Claims (4)

[Claims] 1. A remote control device for a two-screen television receiver capable of simultaneously displaying two images, comprising: a remote control transmitter for generating a transmission signal for remote control; and the two-screen television receiver. And first and second light receivers respectively provided on the left and right of the remote controller for receiving transmission signals from the remote control transmitter, and using the output signals of the first and second light receivers, the direction of the remote control transmitter A light receiving circuit including a discriminating circuit for discriminating the image signal; and control means for individually controlling video signals displayed on the left and right sides of the two-screen television receiver in response to the discrimination result of the discriminating circuit of the light receiving circuit. A remote control device comprising: 2. The light receiving circuit includes: first and second light receivers provided on left and right sides of the two-screen television receiver for receiving a transmission signal from the remote control transmitter; and the first and second light receivers. First and second amplifiers respectively amplifying the outputs of the optical receivers; a comparison circuit for comparing the output signal intensities of the first and second amplifiers; 2. The remote control device according to claim 1, further comprising a determination circuit for determining an orientation. 3. The first and second light receivers provided on left and right sides of the two-screen television receiver for receiving a transmission signal from the remote control transmitter, the first and second light receivers are provided. First and second sampling circuits for respectively sampling the output signals of the optical receivers and outputting sampling values; and first and second delays for respectively delaying the sampling values from the first and second sampling circuits. A sampled value from the first sampling circuit;
A first differential circuit that takes a difference from a delayed sampling value from the first delay circuit; a sampling value from the second sampling circuit;
A second differential circuit that takes a difference from a delayed sampling value from the second delay circuit; and an output code of a difference signal from the first and second differential circuits, using the output code of the remote control transmitter. A first determination circuit for determining a moving direction; a determination result from the first determination circuit;
A coordinate calculation circuit for calculating the amount of change in the direction of the remote control transmitter from the intensity of each difference signal from the differential circuit; and determining the direction of the remote control transmitter using the calculation result from the coordinate calculation circuit. 2. The remote control device according to claim 1, further comprising a second determination circuit that performs the determination. 4. The first and second light receivers provided on left and right sides of the two-screen television receiver and receiving transmission signals from the remote control transmitter, respectively, First and second amplifiers respectively amplifying the outputs of the two photodetectors; a comparison circuit for comparing the intensities of the output signals of the first and second amplifiers; and the remote control transmitter according to the comparison result by the comparison circuit. A first discriminating circuit for discriminating the directions of the first and second photodetectors; first and second sampling circuits for respectively sampling output signals of the first and second photodetectors and outputting a sampling value; First and second delay circuits for respectively delaying the sampling value from the sampling circuit of the above, and the sampling value from the first sampling circuit;
A first differential circuit that takes a difference from a delayed sampling value from the first delay circuit; a sampling value from the second sampling circuit;
A second differential circuit that takes a difference from a delayed sampling value from the second delay circuit; and an output code of a difference signal from the first and second differential circuits. A second determination circuit for determining a moving direction; a determination result from the second determination circuit;
A coordinate calculation circuit for calculating the amount of change in the direction of the remote control transmitter from the intensity of each difference signal from the differential circuit; and determining the direction of the remote control transmitter using the calculation result from the coordinate calculation circuit. A third discriminating circuit that extracts an intensity difference between the output signals from the first and second light receivers and, when the intensity difference is equal to or more than a predetermined level, utilizes the output of the first discriminating circuit to The direction of the remote control transmitter is determined, and if the intensity difference is equal to or less than a predetermined level, the third
2. A remote control device according to claim 1, further comprising: a fourth determination circuit that determines the direction of said remote control transmitter by using an output of said determination circuit.