JPH05283981A - Display device - Google Patents

Abstract

PURPOSE:To miniaturize the indicator of a radio cassette tape recorder, etc., and to facilitate the selecting station in a receiver. CONSTITUTION:A radio cassette tape recorder is provided with an indicator 7 having an equipment name display part 3, a figure display part 4, a mode display part 5 and a direction display part 6. Based on the instruction from an input operation part 9 operating a receiver 1, a frequency control part 10 instructing reception frequency and a synchronizing state detection part 11 judging a selecting station state are provided. When the rise or fall switch of the reception frequency is operated, the synchronizing or the asynchronizing state of a reception is displayed on the direction display part 6 and a right selecting station is instructed when the synchronizing is deviated.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a display device for a small audio device in which a cassette tape recorder and a radio receiver are integrated.

[0002]

2. Description of the Related Art In a radio cassette tape recorder in which a cassette tape recorder and a radio receiver are integrated, a display device for displaying operating conditions of the tape recorder and the receiver is commonly used. FIG. 7 is an example showing the configuration of a liquid crystal display in a conventional display device, showing the arrangement of display elements and the operating states of a receiver and a tape recorder. FIG. 7A shows the arrangement and configuration of all display segments in the display device 20. The device name display unit 21 is a character display unit that displays which of the receiver and the tape recorder is used. The number display unit 22 is a display unit that displays a four-digit number and a decimal point, and displays the reception frequency of the receiver and the tape count. A direction indicator 23 is provided at the end of the indicator 20 and has four segments indicating the tape running direction. Illumination of the segment 23a indicates reproduction in the forward direction, and segment 23b indicates reproduction in the reverse direction. Further, fast-forwarding of the tape in the forward direction is indicated by simultaneous lighting of the segments 23a and 23c, and fast-forwarding in the reverse direction is indicated by simultaneous lighting of the segments 23b and 23d. The mode display unit 24 is composed of segments 24a and 24b showing the pause and recording modes of the tape recorder,
Further, it is composed of a segment 24c indicating tuning of FM reception, a segment 24d indicating stereo reception, a segment 24e indicating monaural reception, and the like.

FIG. 7B shows a state where the receiver in the radio cassette tape recorder is used and the reception of the FM stereo broadcast of 90.1 MHz is displayed. Further, FIG. 7 (c) shows a state in which recording or reproduction can be performed by using the tape recorder with the tape count of the tape cassette set to 0.

[0004]

As described above, in the configuration of the display device of the conventional radio cassette tape recorder, the tape running state of the tape recorder and the synchronization state of FM broadcasting are
They were displayed on different display units. In addition, the tuning display of the FM receiver merely lights the segment 24c, and there is a problem that it is easy to miss the lighting of the tuning display during tuning of the broadcasting station.

Further, when the receiving frequency is changed by operating the push button of the receiver, it is difficult to determine whether the receiving frequency is scanned in the high band side or the low band side. Further, when the tuning frequency deviates, it is impossible to determine whether the already detected broadcast frequency is higher or lower than the current scanning frequency, and there is a problem that the tuning operation is troublesome.

The present invention has been made in view of the above-mentioned problems of the prior art. The display is shared to reduce the size of the display, and the display for more surely confirming the tuning frequency of the receiver is provided. The purpose is to provide a device.

[0006]

As shown in FIG. 1, the present invention provides a device name display section 3 for displaying either a receiver 1 or a recording / reproducing device 2, a reception frequency of the receiver 1 and a recording / reproducing device 2. Number display section 4 indicating the signal recording position, a mode display section 5 displaying the operating states of the receiver 1 and the recording / reproducing device 2, a first direction display element indicating the increase of the reception frequency or the advance of the signal recording position, and the reception. The function of the receiver 1 or the recording / reproducing apparatus 2 and the indicator 7 having the direction indicator 6 including the second directional display element indicating the decrease of the reception frequency of the device 1 or the backward movement of the signal recording position of the recording / reproducing apparatus 2. The function switching section 8 to be selected, the input operation section 9 for inputting the operating conditions of the receiver 1 and the recording / reproducing apparatus 2, the reception frequency of the receiver 1 is controlled by the input from the input operation section 9, and the display 7 is provided. The value is output to the number display section 4 of The deviation of the tuning state and the tuning center frequency of the wave number control unit 10 and the receiver 1 is detected, and in the tuning state of the receiver 1, both the first and second direction display elements of the display are turned on to bring them close to the tuning frequency. The second or first direction display element is turned on at the high frequency band side and the low frequency band side of the tuning frequency within the specific frequency range, respectively, and the first or second direction display element is turned on while the receiving frequency is rising or falling outside the specific frequency range. , A tuning state detection unit 11 for lighting the second direction display element.

[0007]

According to the present invention having such a feature, when the receiver is operated by the function switching section, the display displays the operating state of the receiver. When the switch for selecting the frequency band of the input operation section is turned on, the broadcast band is displayed on the device name display section of the display and the received frequency is displayed on the number display section. When the input operation unit instructs the frequency control unit to increase or decrease the reception frequency, the reception frequency is intermittently or continuously changed and the tuning is executed. When the receiver is in the tuning state, both the first and second directional display elements are turned on, and when the frequency is increased from the tuning frequency to the high frequency side, the frequency within a specific frequency range close to the initial tuning frequency is reached. The second direction display element that displays in the opposite direction to the changing direction is turned on. Further, when the tuning frequency is changed to the low frequency side, the first direction display element for indicating the opposite direction is turned on.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 2 is a block diagram of a circuit showing a configuration of a display device in one embodiment of the present invention. In the figure, the radio cassette tape recorder is integrally configured with a receiver 1 for receiving FM broadcast and a recording / reproducing device 2 such as a cassette tape recorder. Further, a function switching circuit 3 for selecting the operation of the receiver 1 or the recording / reproducing apparatus 2 when instructed by a switch on the operation surface of the radio cassette tape recorder.
1 and a display 7 for displaying the operating state of the receiver 1 and the recording / reproducing apparatus 2 is attached to a part of the panel of the radio cassette tape recorder. As switches connected to the function switching circuit 31, switches 31a and 31b for inputting the operation of the receiver 1 or the recording / reproducing device 2 are provided. The function switching circuit 31 and the switches 31a and 31b achieve the function of the function switching unit 8. Further, on the panel, a band switch 32a connected to the input circuit 32 for instructing the reception band of the receiver 1, an up switch 32b for instructing an increase of the reception frequency, and a down switch 32c for instructing a decrease of the reception frequency, stereo or monaural reception. A mode switch 32d for instructing is provided. These switches 3
Reference numerals 2a to 32d are touch switches, for example. When the FM broadcast is received by the band switch 32a, the reception frequency is set to increase or decrease by 0.1 MHz by 0.1 MHz by touching the up switch 32b or the down switch 32c. When the band switch 32a switches the band to AM broadcasting, the step frequency set in the band is added or subtracted by the switch 32b or 32c. In addition, as a recording / playback device switch connected to another input circuit 33, a switch 33
a to 33 g are provided. These are switches for instructing normal and reverse playback operations of the tape of the recording / playback apparatus 2, forward and reverse fast-forward operations, and recording and pause.
These switches 32a to 32d and switches 33a to 3
3 g and the input circuits 32 and 33 achieve the function of the input operation unit 9.

Function switching circuit 31 and input circuits 32 and 33
Receiving an operation instruction signal from the receiver 1 and the recording / reproducing device 2
A microcomputer (hereinafter, referred to as a CPU) 34 that inputs and outputs a control signal necessary for the operation of (1) and performs signal processing is provided. An input circuit 35 and an output circuit 36 are provided between the CPU 34 and the receiver 1. The input circuit 35 is the receiver 1
Is a circuit for sending a tuning signal output, FM stereo, monaural mode, and other signals to the CPU 34 when the FM broadcast is received. The output circuit 36 is a circuit that receives an instruction from the CPU 34 and instructs the tuner section of the receiver 1 to receive a radio wave of a specific frequency. This instructs the local oscillation circuit section of the PLL (not shown) provided inside the receiver 1 to oscillate at a frequency lower by 10.7 MHz from the intended reception frequency. An input circuit 37 and an output circuit 38 are provided between the CPU 34 and the recording / reproducing device 2. The input circuit 37 detects the rotational speed of the capstan and the end of the cassette tape from the mechanical section of the recording / reproducing device 2, and the result is detected by the CPU 34.
Configured to give to. The output circuit 38 is configured to give a control signal in response to an instruction from the CPU 34 so that the mechanical section of the recording / reproducing apparatus 2 operates in a designated mode.

A memory 39 and a display drive circuit 40 are connected to the CPU 34. The memory 39 holds a control procedure that functions as a frequency control section and a tuning state detection section, which will be described later, as a program. The display drive circuit 40 is instructed by the function switching circuit 31 so that the receiver 1 or the recording / reproducing device 2 can be operated.
Is a circuit which is supplied with a display signal necessary for the operation display of and supplies voltage to each display portion of the display unit 7. The sounding unit 41 may be connected as an output means of the CPU 34. Pronunciation section 41
When the CPU 34 receives the tuning signal output from the input circuit 35 or when the tuning frequency is passed, a recognition sound is emitted.

FIG. 3 is a front view showing the configuration of the display 7 of the display device according to this embodiment. The display unit 7 has a device name display section 3 as a character display section for displaying the use of the receiver or the tape recorder, a four-digit number for displaying the reception frequency and the tape count of the receiver, and a numerical display for displaying the decimal point. A section 4 is provided. Unlike the conventional example of FIG. 7, the mode display unit 5 has a segment 45a for displaying the pause mode of the recording / reproducing apparatus and a segment 45b for displaying the recording mode, and the receiver 1 further receives the FM broadcast. Segments 45c and 45d for displaying stereo or monaural state
Have respectively. The mode display unit 5 displays the operating states of the receiver 1 and the recording / reproducing device 2 of the display device 7. Further, the display 7 has triangular segments 46a to 46
A direction display unit 6 including four segments of d is provided.
The segments 46a and 46c are first direction display elements for displaying the positive direction of the signal recording / reproducing position and the rising direction of the reception frequency, and the segments 46b and 46d are the first direction display elements for displaying the reverse direction of the signal recording / reproducing position and the decreasing direction of the reception frequency. 2 direction display element. Here, in addition to the display of the running state of the tape, when the receiver 1 is used, the tuning state detecting unit 1 described later is used.
1 is used to display the rise and fall of the reception frequency.

Next, regarding the operation of the display device of this embodiment,
This will be described with reference to the flowcharts of FIGS. 4 and 5 and the explanatory view showing the display state of the display device 7 of FIG. When the switch 31b is pressed when the receiver 1 is operated, the reception band is displayed on the device name display unit 3 shown in FIG. Here, when FM broadcast is selected by the band switch 32a, the character "FM" is displayed on the device name display section 3 of the display 7, and the frequency preset by the CPU 34 is displayed on the number display section 4.

When selecting a channel having a radio frequency higher than the preset frequency, the up switch 3 is used.
Press 2b. Then, the reception frequency is changed to start the FM broadcast channel selection. The flowchart shown in FIG.
The signal processing procedure in PU34 and the memory 39 is shown. In step 50, the ON signal of the up switch 32b is received once, and the PLL circuit of the receiver 1 is instructed to change the local oscillation frequency.
Light up. Here, the frequency f _OSC indicates a local oscillation frequency that is lower than the current reception frequency by 10.7 MHz. Further, the step frequency f _S is a step frequency for changing the reception frequency, and in this embodiment, f _S is 0.1 MHz. By turning on the up switch 32b once,
In this step 52, the initial local oscillation frequency f _{OSC is set} to 0.1.
Addition of MHZ to instruct oscillation of frequency f _OSC1 . Then, the process proceeds to step 53, where the current local oscillation frequency f _{OSC1 is set} to 10.7M.
Hz is added. This frequency f indicates the actual FM center frequency received by the receiver 1, and this value is displayed on the numeral display section 4 of the display unit 7. The display example shown in FIG. 6A is 90.0.
It shows the state of receiving the FM radio wave of MHZ, and if the FM broadcast cannot be received at this frequency, the local oscillation frequency f _OSC is further changed.

Next, in step 54, the lapse of the specified time is waited, and in step 55, it is checked whether or not the up switch 32b is on. If the up switch 32b is not continuously pressed, the process returns from step 55 to step 50 to wait for the next switch operation. If the person who wants to receive the FM broadcast operates the up switch 32b intermittently until the desired channel selection is completed, the steps 50 to 55 are repeated.

If the up switch 32b is continuously pressed, the CPU 34 determines that it is an instruction to continue tuning.
In this case f _S is added to the local oscillation frequency f _OSC1 step 56 to get the next local oscillation frequency f _OSC2. Then, in step 57, the frequency of 10.7 MHz is added to display the reception frequency f on the numeral display section 4, and at the same time, the segment 46a is continuously lit on the display 7 (step 58). Here, when the tuning signal output is not continuously detected from the input circuit 35, the process branches from step 59 to step 60.
The procedure of steps 56 to 60 is repeated until the ON operation of the up switch 32b is continued and a tuning signal output is obtained. If the up switch 32b is turned off, the process returns from step 60 to step 50 to switch to manual tuning.

When the tuning signal output is detected in step 59, the process proceeds to step 61 shown in FIG. 5 to switch the rising display of the reception frequency to the tuning display. That is, the segments 46a, 4
6b is turned on together to obtain the state shown in FIG. 6 (b). This display shows that the FM broadcast of 90.5 MHz is being received. When the up switch 32b is further pressed, the steps 62, 63, 64 and 65 are repeated, and the reception frequency increases every 0.1 MHz. When the up switch 32b is turned off in the state where the synchronizing signal output of the input circuit 35 is obtained, the reception frequency shown in step 63 is maintained and step 50
Return to.

However, in step 65, the up switch 32b
If you keep pressing, the synchronization will be lost and the sync signal will not be output. At this time, the process proceeds to step 66 and the segment 46b
Is turned on, and the display of the direction display portion 6 of the display 7 is switched as shown in FIG. 6 (c). This display shows that there is a tuning frequency on the low frequency side near 90.7 MHz. If the up switch 32b is further pressed, the reception frequency rises (steps 67 and 68) and becomes higher than the tuning frequency in step 63 by 0.3 MHz. This shows the range of frequencies that can be easily returned to the previous tuning state, indicating that tuning is possible at the low frequency side of 0.3 MHz from the current set frequency. The upper limit frequency shown in step 69 can be arbitrarily set by the program of the memory 39. Step 69
If the upper limit frequency shown in (1) has not been reached, pressing and holding the up switch 32b returns from step 70 to step 67 to increase the reception frequency. Next, when the upper limit frequency shown in step 69 is exceeded, the routine proceeds to step 71, and the direction display portion of the display 7 is switched. Here, the segment 46a is turned on and the increase in the reception frequency is displayed again. This state is shown in Figure 6.
Similar to that shown in (a), the signal processing procedure similar to the above is performed from the starting point again by turning on or off the up switch 32b. The flow charts shown in FIGS. 4 and 5 have described the case where the reception frequency is increased, but the same is true for the case where the reception frequency is decreased. In the direction display unit 6 shown in FIG. 6, the segment 46b lights up when the frequency decreases,
The segment 46a lights up on the low frequency side where the tuning frequency is close.

In the above signal processing procedure, the CPU 34
Achieves the function of the frequency control unit 10 which controls the reception frequency by the input of the input operation unit in steps 52, 53, 56, 57, 62, 63, 67 and 68 and outputs the value to the numerical display unit. Therefore, the function of the tuning state detecting unit 11 for detecting the tuning state in steps 58, 59, 61, 64, 66, 69, 71 and detecting the frequency deviation in the vicinity of the tuning is achieved.

As described above, according to the present embodiment, when a predetermined reception level can be secured when the switches 32a to 32d are selected, the tuning signal is output to the two segments 46a and 46b of the direction display section 6. Lights at the same time. If the reception frequency is further changed from this tuning state,
It indicates whether the selectable frequency is higher or lower than the current reception frequency within a range close to the first tuning frequency. Therefore, even if the reception frequency is changed carelessly, a receivable broadcast wave close to the current set frequency can be easily searched for. On the other hand, when the radio cassette tape recorder is used as a tape recorder, each of the segments 46a to 46d of the direction display section 6 can display the traveling direction of the tape and the state of the reproduction or fast-forward mode together. Therefore, the number of display elements of the display device is small, and the display device mounted on a small radio cassette tape recorder can be downsized.

Although the frequency change and tuning state in tuning are displayed by the segments 46a to 46d of the display unit 7, the output of the CPU 34 is given to the sound producing means 41 to notify the tuning state or step out state by voice. You can also do it. The flowcharts shown in FIGS. 4 and 5 show the FM broadcast channel selection procedure, but the local oscillation frequency f _{OSC of the} PLL is
Also, by changing the step frequency f _S for each reception band, it can be used for AM broadcasting and channel selection for other bands.

[0021]

As described in detail above, according to the present invention, a numerical display portion for indicating the reception frequency of the receiver and the signal recording position of the recording / reproducing apparatus, and the increase or decrease of the reception frequency and the signal recording position are displayed. A display having a direction display section for indicating a forward or backward direction is provided, and when the recording / reproducing apparatus is used, the traveling direction of the recording medium and the operation mode are displayed on the direction display section. When the receiver selects a channel, it detects the tuning of the received frequency and determines the low frequency side and the high frequency side within a specific frequency range close to this tuning frequency. When the section is turned on, the display allows the channel to be surely selected. Further, by displaying the direction opposite to the frequency changing direction near the tuning point, more reliable channel selection can be performed near the frequency. Further, since the receiver and the recording / reproducing device also function as the direction display section, the number of display elements of the display device can be reduced, and a more compact display device can be realized.

[Brief description of drawings]

FIG. 1 is a block diagram showing a functional configuration of a display device of the present invention.

FIG. 2 is a block diagram showing a display device according to an embodiment of the present invention.

FIG. 2 is a front view showing an arrangement of display elements in a display device of a display device in an example.

FIG. 4 is a flowchart (part 1) showing the signal processing procedure of the microcomputer of the display device in the example.

FIG. 5 is a flowchart (No. 2) showing the signal processing procedure of the microcomputer of the display device in the example.

FIG. 6 is a front view showing a display example of the display device in the embodiment, (a) shows a state when the FM reception frequency is increased, (b) shows a tuning state at the time of tuning, (c) [Fig. 3] is a diagram showing a state when the tuning frequency is changed to a high frequency side.

FIG. 7 is a front view of a display device showing a display example in a conventional display device, (a) shows an array of all display elements,
(B) is a diagram showing a state in which FM broadcasting is selected, and (c) is a diagram showing a state when a cassette tape recorder is used.

[Explanation of symbols]

 1 receiver 2 recording / reproducing device 3 device name display unit 4 number display unit 5 mode display unit 6 direction display unit 7 display unit 8 function switching unit 9 input operation unit 10 frequency control unit 11 tuning state detection unit 31 function switching circuit 32 input Circuit 32a Band switch 32b Up switch 32c Down switch 32d Mode switch 34 CPU 39 Memory 46a, 46b, 46c, 46d Segment

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[Procedure amendment]

[Submission date] March 26, 1993

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be corrected] Brief description of the drawing

[Correction method] Change

[Correction content]

[Brief description of drawings]

FIG. 1 is a block diagram showing a functional configuration of a display device of the present invention.

FIG. 2 is a block diagram showing a display device according to an embodiment of the present invention.

FIG. 3 is a front view showing an arrangement of display elements in a display unit of a display device according to an example.

FIG. 4 is a flowchart (part 1) showing the signal processing procedure of the microcomputer of the display device in the example.

FIG. 5 is a flowchart (No. 2) showing the signal processing procedure of the microcomputer of the display device in the example.

FIG. 6 is a front view showing a display example of the display device in the embodiment, (a) shows a state when the FM reception frequency is increased, (b) shows a tuning state at the time of tuning, (c) [Fig. 3] is a diagram showing a state when the tuning frequency is changed to a high frequency side.

FIG. 7 is a front view of a display device showing a display example in a conventional display device, (a) shows an array of all display elements,
(B) is a diagram showing a state in which FM broadcasting is selected, and (c) is a diagram showing a state when a cassette tape recorder is used.

[Explanation of Codes] 1 receiver 2 recording / reproducing device 3 device name display unit 4 number display unit 5 mode display unit 6 direction display unit 7 display unit 8 function switching unit 9 input operation unit 10 frequency control unit 11 tuning state detection unit 31 Function switching circuit 32 Input circuit 32a Band switch 32b Up switch 32c Down switch 32d Mode switch 34 CPU 39 Memory 46a, 46b, 46c, 46d Segment

Claims (1)

[Claims] 1. A device name display section for displaying either the receiver or the recording / reproducing apparatus, a numerical display section for indicating a reception frequency of the receiver and a signal recording position of the recording / reproducing apparatus, the receiver and the recording / reproducing apparatus. , A mode display section for displaying the operating state of, a first directional display element for indicating an increase in the reception frequency or an advance of the signal recording position and a decrease of the reception frequency of the receiver or an inversion of the signal recording position of the recording / reproducing device. A display having a direction display section including a second direction display element, a function switching section for selecting a function of the receiver or the recording / reproducing apparatus, and an input for inputting operating conditions of the receiver and the recording / reproducing apparatus. An operation unit, a frequency control unit for controlling the reception frequency of the receiver by an input from the input operation unit, and for outputting the value to the numeral display unit of the display, a tuning state of the receiver, and A deviation of the tuning center frequency is detected, both the first and second directional display elements of the display are turned on in the tuning state of the receiver, and the tuning frequency within a specific frequency range close to the tuning frequency is detected. The second or first directional display element is turned on at the high frequency side and the low frequency side, respectively, and the first and second directional display elements are respectively activated while the reception frequency is rising or falling outside the specific frequency range. And a synchronization state detection unit that lights up the display device.