JPH02104055A - Telephone set with display function - Google Patents

Abstract

PURPOSE:To attain the information of the position of a telephone set by detecting the utterance of a voice by a user with a voice detection section, outputting a signal to a control section, lighting a back light for a prescribed time based on the output at the control section and lighting a display section. CONSTITUTION:A voice reaching the telephone set is inputted to the voice detection section 3 through a microphone 1 and an amplifier 2 and the section 3 applies detection. A signal in the detection section is given to a band pass filter 11, the result is amplified by a gain adjustment amplifier 12 and the voice level in a required frequency region converted into a DC voltage by a detector circuit 13 is compared with a reference voltage 14 at a comparator 15 and when the voice level exceeds a reference value, a control signal is outputted. When the control signal is inputted to a control section 4, a back light driving section 5 is controlled only for a time set by a timer to light the back light 6.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a telephone equipped with a display function, and particularly to a telephone that is easy to use in the dark.

[Conventional technology]

2. Description of the Related Art In recent years, telephones with display functions that display telephone numbers and other information have been proposed, and the telephone number and the name of the person being called are displayed so that the user can visually confirm the information. Many of these displays use liquid crystals or the like, and therefore, when using the telephone in darkness such as at night, the telephone is operated to turn on the backlight to display the display.

[Problem to be solved by the invention]

In the above-mentioned conventional telephone with a display function, when using the telephone in the dark, the only way to use the telephone is to grope around to find the telephone and turn on the backlight, or to use other room lighting. To avoid this, it is necessary to keep the backlight on at all times, and if the backlight is made of light emitting diodes (LEDs), it will increase the current consumption.
Alternatively, if electroluminescence (EL) is used, the life of EL will be shortened.

SUMMARY OF THE INVENTION An object of the present invention is to provide a telephone with a display function that can be easily used even in the dark by turning on the backlight.

[Means to solve the problem]

A telephone with a display function of the present invention includes a display function and a backlight for illuminating the display function, and includes a voice detection unit that detects the presence or absence of voice, and a backlight that lights up in accordance with the output of the voice detection unit. and a control section for controlling the operation.

[Effect]

In the configuration described above, when the user generates a sound, the audio detection section detects this and outputs a signal to the control section.Based on this, the control section turns on the backlight for a predetermined period of time and turns on the display section. The device can be illuminated to indicate the location of the phone.

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

FIG. 1 is a block diagram of one embodiment of the present invention.

In the figure, this telephone with a display function is configured so that a part of the audio signal output from an amplifier 2 connected to a microphone 1 for telephone calls is introduced into an audio detection section 3. As shown in FIG. 2, this voice detection section 3 includes a handpass filter 11. 8-gain adjustable amplifier 12. Detector circuit 1
3. It has a reference voltage of 14° and a comparator 15, and can output audio in a required frequency range and at a required level or higher as a control signal.

The audio detection section 3 is connected to a backlight drive section 5 that drives a backlight 6 consisting of a light emitting diode or the like via a control section 4 composed of a microcomputer or the like.

According to this configuration, the voice reaching the telephone is manually inputted to the voice detection section 3 through the microphone 1 and the amplifier 2, and a detection operation is performed there. Detection operation is performed by band pass filter 11
The level of the sound in the desired frequency range, which has been passed through the filter and amplified by the gain adjustment amplifier 12 and converted into a DC voltage by the detector circuit 13, is converted to a reference voltage 14 by the comparator 15.
The control signal is output when the audio level exceeds the reference value.

The control unit 4 performs processing according to the flow shown in FIG. 3, and when the control signal is inputted to the control unit 4, the backlight drive unit 5 is controlled only for the time set by the timer. The bank light 6 can be turned on.

That is, the control section 4 constantly checks the signal from the voice detection section 3 to determine the presence or absence of voice, that is, a control signal.

Now, if a control signal is present, the process moves to backlight lighting processing and at the same time starts a timer. Then, by turning off the backlight when the timer ends and there is no audio, the backlight continues to be lit for an arbitrary period of time.

As a result, when the user of the telephone makes a sound in the dark by making a loud noise or clapping his/her hands, this sound is detected by the voice detection section 3 through the microphone 1 and the amplifier 2, and outputs a control signal. , the backlight 6 is turned on by the above-described process. Therefore, by performing the above-described operations in the dark, the user can find the illuminated display section of the telephone, and can use the telephone.

Note that malfunctions due to noise can be prevented by lowering the gain of the gain adjustment amplifier 12, setting the detection level to high and using the bandpass filter 11.

Further, in consideration of use in a bright environment such as daytime, a switch may be provided to turn off the control of the backlight itself in response to audio.

〔Effect of the invention〕

As explained above, the present invention is configured to output a signal to the control section and turn on the backlight that illuminates the display section when the sound detection section detects the sound. If this happens, the bank light will turn on and illuminate the display, allowing you to locate the phone even in the dark.

Therefore, it is possible to easily use the telephone in the dark, and since there is no need to constantly turn on the backlight, it is possible to reduce current consumption and extend the life of the device.

[Brief explanation of drawings]

FIG. 1 is a block diagram of an embodiment of the present invention, FIG. 2 is a block diagram of a voice detection section, and FIG. 3 is a flowchart showing processing in the control section. DESCRIPTION OF SYMBOLS 1... Microphone, 2... Amplifier, 3... Audio detection part, 4... Control part, 5... Backlight drive part,
6...Backlight, 11...Band pass filter, 12...Gain adjustment amplifier, 13...Detector circuit, 14...Fig. 1, υ Fig. 3

Claims (1)

[Claims] 1. In a telephone with a display function that includes a display section that displays a telephone number, etc., and a backlight that illuminates this display section, a voice detection section that detects the presence or absence of voice, and a voice detection section that detects the presence or absence of voice, and a A telephone with a display function, comprising: a control section that turns on the backlight.