JPH04233854A - Portable telephone set - Google Patents

Abstract

PURPOSE:To provide the portable telephone set in which key operation is easy even at a dark place and the power consumption is minimized. CONSTITUTION:A portable telephone set 1 is provided with light emitting elements 16A-17I lighting up keys 14A-15I, a detection element 181 detecting the lightness of the surrounding of the portable telephone set 1 and a detection means 191 detecting the operating state of the portable telephone set 1. The light emitting elements 16A-17I are lighted to light up the keys 14A-15I only when the surrounding is dark and the portable telephone set 1 is in use based on a detection output SC of the detection element 181 and the detection output SS of the detection means 191.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to mobile telephones such as cordless telephones.

0002

[Prior Art] General telephones have cables connected to modular jacks installed on walls, etc.
It must be placed in a certain location and used. Since the telephone is placed in a fixed location and used, there is no problem even if the power cord is connected to a commercial AC power source to obtain the operating voltage of the telephone.

If power can be obtained from outside in this way, a light source can be installed inside the dial key to make it self-illuminated, and by making it self-illuminated, it is possible to operate dials even in a dark place. becomes easier.

[0004] For example, when making a call in the evening, you can dial without turning on the lights in the room each time.

[0005] Literature: Utility Model Application Publication No. 62-26965, Utility Model Application Publication No. 63-196144, etc.

[0006]

[Problems to be Solved by the Invention] However, since mobile phones are powered by built-in rechargeable batteries, it is necessary to reduce power consumption as much as possible. If the phone could be dialed, the amount of time it could be used as a phone on a single charge of the battery would be shortened.

[0007] The present invention aims to solve these problems.

[0008]

[Means for Solving the Problems] Therefore, in the present invention, if the reference numerals of each part correspond to the embodiments described later, a light emitting element 16A that illuminates various keys 14A to 15I is provided.
~17I, a detection element 181 that detects ambient brightness, a detection means 191 that detects usage status, and a detection element 18
1 and a logic circuit 130 to which the detection output SC of the detection means 191 and the detection output SS of the detection means 191 are supplied, and the logic circuit 13
0, the light emitting elements 16A to 17I are turned on and the keys 14A to 15 are activated only when the surroundings are dark and the keys 14A to 15 are being used.
It is designed to illuminate I.

[0009]

[Operation] The detection element 181 detects the brightness of the surroundings, and the detection means 191 detects the usage status of the mobile phone 1. Only when the surroundings are dark and the mobile phone 1 is being used, the light emitting elements 16A to 17I are activated. key 14 lit
A to 15I are illuminated. Therefore, it becomes easy to operate the keys of the mobile phone 1 in a dark place, and battery consumption is minimized.

0010

[Embodiment] In FIG. 1, 1 is a cordless telephone handset or a handset such as a telepoint system, that is,
A mobile phone is shown, and although not shown, its operating power source is a rechargeable battery.

In the mobile phone 1, 100 is a transmitting/receiving antenna, 110 is a transmitting circuit, and 120 is a receiving circuit. Send to the base unit of the telephone (or base station of the Telepoint system). Further, the receiving circuit 120 receives the FM signal of the downlink channel from the base unit, demodulates the audio signal, and supplies the demodulated audio signal to the receiver 121 .

Furthermore, 122 is a ringer for incoming calls, 130
indicates a microcomputer for system control, and this microcomputer 130 controls the transmitting circuit 110, the receiving circuit 120, and the ringer 122.

[0013] Also, 14A to 14L are dial keys, 1
5A-15I are operation keys such as talk keys, 16A-1
6L, 17A to 17I are light emitting elements, in this example,
These LEDs 16A to 17I indicate the key 14.
A to 15I are integrated to illuminate the keys 14A to 15I, making the keys 14A to 15I self-illuminated keys.

[0014]Then, the outputs of the keys 14A to 15I are supplied to the microcomputer 130, and the LEDs 16A to 17
The lighting of I is controlled by the microcomputer 130.

Further, reference numeral 181 denotes a detection element for detecting the amount of ambient light. In this example, this detection element 181 is a CdS element for photoelectric conversion, and its detection signal SC is inverted by a transistor 182 and then supplied to the microcomputer 130. be done.

Further, 191 indicates a normally open switch. This switch 191 is for detecting the usage state of the telephone 1, and its switch output SS is also supplied to the microcomputer 130.

Then, the microcomputer 130 generates an inverted signal of the signal SC! The LEDs 16A to 17I are turned on only when SC is "1" and the signal SS is "1".

Further, the switch 191 and the element 181 are
For example, as shown in FIG. 2, it is provided.

That is, in FIG. 2, 200 indicates the main body of the cabinet or case of the mobile phone, and this main body 200 is formed in the shape of a rectangular parallelepiped as a whole. The above-mentioned circuits are housed inside the main body 200, and the front face 201 of the main body 200 includes a transmitter 111, a receiver 121, and dial keys 14A to 14L.
, operation keys 15A to 15I, etc. are provided.

Further, 210 indicates a rectangular lid, and in this example, the lid 210 has a hinge mechanism 211.
The cover 210 is attached to the main body 200 and covers the front surface 201 of the main body when the lid 210 is closed.

[0021] Furthermore, when the lid body 210 is closed,
The engagement protrusion 212 engages with the engagement recess 202 of the main body 200 to hold the lid 210 in a closed state. Furthermore, in this example, the engagement recess 2
02 is provided with the above-mentioned switch 191, and the lid body 210
When the switch 191 is closed, the switch 191 is turned on by being pushed by the engagement protrusion 212.

[0022] Furthermore, a CdS element 181 is provided, for example, on the front of the main body 200, so that the surrounding brightness can be detected. However, at this time, the detection operation of the CdS element 181 is not affected by the output light of the LEDs 16A to 17I.

[0023] According to this configuration, the basic operations or processes of the mobile phone are executed as follows.

That is, when the telephone 1 is in standby mode, when the talk key among the operation keys 15A to 15I is pressed, the microcomputer 130 allows the transmitting circuit 110 to transmit, and a predetermined protocol is established between the base unit and the base unit. This is executed and a communication channel is opened between the telephone set 1 and the base unit. Further, the base unit is placed in an off-hook state. Therefore, a call has been made.

[0025] Then, when the other party's telephone number is input using the dial keys 14A to 14L, this is sent to the base unit, and
The other party's phone rings.

When the other party answers the telephone, the other party's voice signal is taken out from the receiving circuit 120 and supplied to the receiver 121. Further, the audio signal from the transmitter 111 is supplied to the transmitting circuit 110 and sent to the other party's telephone. Therefore, it is possible to talk to the other party.

[0027] Also, when the call is over, keys 15A~
When the talk key of 15I is pressed, the base unit is notified that the call is over, the communication channel with the base unit is closed, and the telephone 1 returns to the standby state.

Furthermore, when in the standby state, if there is an incoming call from an outside line, this incoming call is transmitted from the base unit to the receiving circuit 12.
The microcomputer 130 is notified through 0. Then, the microcomputer 130 allows the transmission circuit 110 to transmit, a predetermined protocol is executed with the base unit, and a communication channel is opened between the telephone set 1 and the base unit. Further, the microcomputer 130 drives the ringer 122 to produce a ringer sound indicating an incoming call.

When a talk key among the operation keys 15A to 15I is pressed, the fact that the talk key has been pressed is transmitted to the base unit, and the base unit is placed in an off-hook state. Further, the microcomputer 130 stops the ringing sound. Therefore, from now on, the user can use the telephone 1 to talk to the other party.

[0030] In addition to the above operations or processing,
According to the present invention, the following operations or processes are further executed by the microcomputer 130.

That is, when the cover 210 of the telephone 1 is opened to make or receive a call, the engaging protrusion 212
The switch 191, which had been turned on, is turned off.
The signal SS supplied to the microcomputer 130 becomes "1".

Furthermore, when the lid body 210 is opened, the CdS element 181 becomes in a state where it can receive external light, but in this case, when the surroundings are so dark that the keys 14A to 15I cannot be operated properly, SC=" 0” and the signal supplied to the microcomputer 130! SC becomes "1".

[0033] And, SS="1" and! SC =
Since it is “1”, LED16A~1 is set by the microcomputer 130.
7I is lit. Therefore, the keys 14A to 15I are illuminated by the LEDs 16A to 17I, so even if the surroundings are dark, the keys 14A to 15I themselves are lit, so the key 1
4A-15I can be operated appropriately.

However, when the surroundings are bright enough to operate the keys 14A to 15I,! Since SC="0",
LEDs 16A to 17I are not lit.

Furthermore, even when the surroundings are so dark that the keys 14A to 15I cannot be operated, when the lid body 210 is closed, SS="0", so the LEDs 16A to 17I are turned off.
is not lit. However, when the lid body 210 is closed, there is no need to operate the keys 14A to 15I, and there is no problem even if the LEDs 16A to 17I do not light up.

Thus, according to the present invention, in the mobile phone 1, when the surroundings are dark, the keys 14A to 15I are pressed.
Since the keys 14A to 15I are illuminated by the LEDs 16A to 17I, the keys 14A to 15I can be operated easily and reliably even in a dark place.

Moreover, in this case, especially according to the present invention, the ambient brightness is detected by the CdS element 181, and the usage status of the telephone 1 is detected by the cover body 210 and the switch 1.
91, and only when the surroundings are dark and the telephone 1 is used, the keys 14A to 15I are activated by the LEDs 16A to 1.
Since it is illuminated by 7I, the consumption of the built-in rechargeable battery can be minimized and the usable time can be extended with a single charge.

Furthermore, when the telephone 1 is placed in a bag or the like, the lid body 210 prevents the keys 14A to 15I from being pressed carelessly, and at the same time, the lid body 210 prevents the keys 14A to 15I from being pressed inadvertently.
It also serves as a detection means for determining whether lights 6A to 17I should be lit.

In the above description, the usage state of the telephone 1 is detected by driving the switch 191 by opening and closing the cover 210. However, instead of providing the cover 210, the main body 200
It is also possible to have a structure that can be folded in half so that when the main body 200 is extended, the switch 191 is turned off. Further, in the above description, a switch driven in the same manner as the switch 191 may be linked to the lid body 210 to form a talk key.

[0040]

According to the present invention, in the mobile phone 1, when the surroundings are dark, the keys 14A to 15I are illuminated by LEDs.
Since the keys 16A to 17I are illuminated, the keys 14A to 15I can be operated easily and reliably even in a dark place.

Moreover, in this case, especially according to the present invention, the ambient brightness is detected by the CdS element 181, and the usage state of the telephone 1 is detected by the cover body 210 and the switch 1.
91, and only when the surroundings are dark and the telephone 1 is used, the keys 14A to 15I are activated by the LEDs 16A to 1.
Since it is illuminated by 7I, the consumption of the built-in rechargeable battery can be minimized and the usable time can be extended with a single charge.

Furthermore, when the telephone 1 is placed in a bag or the like, the lid 210 prevents the keys 14A to 15I from being pressed inadvertently, and at the same time turns on the LED 1 when it is dark.
It also serves as a detection means for determining whether lights 6A to 17I should be lit.

[Brief explanation of the drawing]

FIG. 1 is a system diagram of an example of a mobile phone according to the present invention.

FIG. 2 is a perspective view of an example of the appearance of a mobile phone according to the present invention.

[Explanation of symbols]

1 Mobile phones 14A to 14L Dial keys 15A to 15I Operation keys 16A to 17I LED 110 Transmission circuit 111 Transmitter 120 Receiving circuit 121 Receiver 130 Microcomputer 181 CdS element 191 Switch 200 Cabinet or case main body 210
Lid body

Claims (1)

[Claims] Claim 1: A light emitting element that illuminates various keys, a detection element that detects ambient brightness, a detection means that detects the state of use, and a detection output of the detection element and a detection output of the detection means are supplied. and a logic circuit that lights up the light-emitting element to illuminate the keys only when the surroundings are dark and the cell phone is being used.