JPH03934B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in the control of an illuminator of a display of a radio selective calling receiver with a display function (hereinafter referred to as a calling receiver).

Conventionally, in this type of paging receiver, an LCD (Liquid Crystal Display) has been used as a display device. Therefore, a dedicated LD illumination lamp is provided to check the display in dimly dark places or at night. Furthermore, in addition to the LCD illumination lamp, a flicker LED (light emitting diode) is provided, and by dimming the LED, a call notification is made, thereby ensuring a reliable call notification.

In such conventional call receivers, in order to ensure call notification, a flicker LED is provided separately from the LD illumination lamp, which increases the number of parts, increases costs, and makes it difficult to miniaturize. This is a serious drawback.

SUMMARY OF THE INVENTION An object of the present invention is to provide a wireless selective calling receiver with a display function that eliminates the above-mentioned drawbacks, has a simple configuration, is small in cost, and can be made small.

According to the present invention, a carrier wave modulated by a signal including a calling number and display information following the calling number is received and demodulated, and when the calling number of the demodulated signal matches the predetermined own calling number, In a wireless selective calling receiver with a display function that notifies the user of a call, when the own called number is received, the illuminator of the display device for displaying the display information following the own called number is dimmed. A wireless selective call receiver with a display function is obtained, which is characterized by providing a call notification.

Next, the present invention will be explained with reference to the drawings.

FIG. 1 is a block diagram of a conventional radio selective calling receiver with a display function. In FIG. 1, 1 is a receiving antenna of a paging receiver. The radio section 2 has a high frequency circuit, an intermediate frequency circuit, and a frequency discrimination circuit,
It has the function of demodulating received waves and converting them to baseband signals. The waveform shaping section 3 converts the demodulated baseband signal into a digital signal. The data section 4 is
Consists of 1 chip/CPU, synchronizes with the received signal,
It has functions such as receiving a synchronization signal and a selective calling number, generating a ringing tone, receiving display information, error correction, controlling the display section 8, and controlling reading from an external read-only memory (ROM) 5. The ROM 5 stores the calling number of this calling receiver and information specifying the function of the receiver. The speaker driving driver 6 is
It has an internal 2kHz oscillation part and an amplification part, and uses an intermittent signal from the decoder 4 to generate an audio frequency waveform of 2kHz intermittently, and also amplifies the voltage to a level that can drive the speaker 7. The speaker 7 is driven by the speaker driver 6, and notifies the user of a call by making a sound.

The LED driver 15 for Fritzker is
The voltage of the intermittent signal from the speaker driver 6 is converted to a level that can drive the flicker LED 14. The flicker LED 14 notifies you of a call by decreasing the number of points on the LED 14.

The display device 8 displays display information using an LCD.
The LCD illumination lamp 9 is used for illuminating the LCD 8. The illumination lamp driving driver 16 converts the voltage from the power supply 10 to a level that can drive the LCD illumination lamp 9.

Reference numeral 13 denotes a switch for controlling on/off of the power source 10 of the LCD illumination lamp 9. Also, 1
Reference numeral 2 represents a reset switch used to reset the ringing tone and to start re-reading of display information.

Next, the reception operation of this calling receiver and the illumination control of its display section will be explained. The carrier wave received by the antenna 1 is subjected to frequency conversion, amplification, demodulation, and waveform shaping in the radio unit 2 and waveform shaping unit 3, and is sent to the decoder unit 4 as a digital signal. The decoder section 4 compares its own calling number previously written in the ROM 5 with the calling number of the received digital signal to check whether there is a calling. Here, if the decoder unit 4 confirms the call based on the coincidence of both call numbers, the decoder unit 4
The intermittent signal is supplied to the speaker driving driver 6 to drive the speaker 7, and the voltage of the intermittent signal is supplied to the flicker LED driving driver 1.
Step 5 converts it to a level that can drive the LED, and reduces the number of LEDs 14 for the flicker. In this way,
The call notification uses the sound from speaker 7 for fritzker.
This is done by decreasing the number of points on the LED 14.

When display information is added to the calling signal, the display data is outputted by the decoder 4 to the display 8 and displayed. Note that up to four pieces of this display data can be stored in the decoder 4, and later by pressing the reset switch 12,
Can be reread. In addition, when checking display data in a dark place, by turning on the lighting switch 13, the voltage from the power supply 10 is converted to a level that turns on the lighting lamp driver 16, and the LCD lighting lamp is turned on. 9 lights up.

For detailed operations inside the decoder, please refer to the patent application published in
Since it is detailed in the specification of No.-142541, it will be omitted here.

FIG. 2 shows a wireless selective calling receiver with a display function according to an embodiment of the present invention. In FIG. 2, the description of the same parts as those in the conventional example of FIG. 1 will be omitted, and the explanation will focus on display illumination control, which is the main focus of the present invention. The difference between FIG. 2 and FIG. 1 is that in FIG.
This is done by dimming the illumination lamp 109 of LCD 8, and the drive transistor 101 is used to dim the illumination lamp 109 of LCD8. If this transistor 101 is accommodated in the same space when the speaker driver 6 is integrated into an IC, the problem of mounting space will be eliminated.

In other words, in this embodiment, the LCD illumination lamp 109 has a flicker function in addition to the illumination function of the LCD 8, so that the flicker LED 14 and the flicker LED shown in FIG.
The driving driver 15 has been deleted.

Next, with reference to FIG. 3, the operation of the illumination lamp 109 at the time of call notification will be described in detail.

In FIG. 3, is the output signal of the decoder 4. This signal is normally at High (hereinafter abbreviated as H) level, and when a call notification occurs, it goes to H level and Low (hereinafter referred to as L) at a predetermined intermittent cycle. abbreviated) level and change.

FIG. 3 shows a sound signal for driving the speaker 7. In FIG. This signal is generated by inverting the L level and H level of the intermittent signal in the speaker driving driver 6, and then further intermittent the intermittent signal by an oscillator inside the speaker driving driver 6, and then producing an audible level signal. The signal is then amplified to a level that can drive the speaker 7.

FIG. 3 shows an intermittent signal of the illumination lamp 109 for the display (LCD) 8. This signal has the relationship that the intermittent signal from the decoder 4 is inverted by the transistor 101, and when the signal is ON, the LCD
8 illuminations are performed.

Figure 3 shows the status signal of the illumination lamp switch 13, which is normally OFF when not pressed, and turned ON when pressed.

FIG. 3 shows the lighting state of the LCD illumination lamp 109, and when the illumination lamp switch 13 is pressed, the LCD 8 is illuminated.

In the figure, and represents a flicker operation at the time of a call notification, and and represents a time when the LCD 8 is illuminated. When a sound signal (FIG. 3) is output from the decoder 4, the voltage of this sound signal is converted by the speaker driving driver 6 and is converted into a signal (FIG. 3) that drives the speaker 7. to drive. At the same time, the sound signal from the decoder 4 drives the illumination lamp 109 in an inverted form by the driving transistor 101 and dims it (see FIG. 3). The illumination lamp 109 of the LCD 8 is also turned on (see FIG. 3) by turning on the illumination switch 13 (see FIG. 3).

As explained above, the present invention makes it possible to eliminate the flicker LED by making the illuminator of the display device for displaying the display information following the self-calling number also have a flicker function. This has great advantages in simplifying the structure, lowering costs, and downsizing the machine.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing the configuration of a conventional radio selective calling receiver with a display function. FIG. 2 is a block diagram showing the configuration of a wireless selective calling receiver with a display function according to an embodiment of the present invention. FIG. 3 is a diagram showing the operation of a radio selective calling receiver with a display function according to an embodiment of the present invention when the call notification is made and the lighting switch 13 is turned on and off. 1...Antenna, 2...Radio section, 3...Waveform shaping section, 4...Decoder, 5...Read-only memory,
6...Speaker drive driver, 7...Speaker, 8...Display device, 9...Illumination lamp, 10...
Power supply, 11... Power switch, 12... Reset switch, 13... Lighting switch, 14... LED for flicker, 15... Driver for driving LED for flicker, 16... Driver for driving lighting lamp, 101... Drive Transistor for 109...
...Lighting lamp.

Claims (1)

[Claims] 1. Receive and demodulate a carrier wave modulated by a signal containing a calling number and display information following this calling number,
When the calling number of the demodulated signal matches the predetermined own calling number, a wireless selective calling receiver with a display function that notifies the user of the call, when the own calling number is received, A radio selective call receiver with a display function, characterized in that a call notification is made by dimming an illuminator of a display device for displaying subsequent display information.