JPH04247728A - Portable radiotelephony set - Google Patents

Abstract

PURPOSE:To previously evade a sudden line interruption due to the lowering of a reception electric field level by preventing the useless consumption of a battery and urging a user to move to a place where a receiving state is good at the time of the lowering of the reception electric field level. CONSTITUTION:A system which provides a liquid crystal display part 3 displaying the reception electric field level is provided with a voice detector 8. When the detector detects the presence of voice, the reception electric field level is not displayed in the liquid crystal display part 3. An emission diode 7 for reporting the lowering of the reception electric field level is provided in the vicinity of a transmission mike 6.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to portable radio telephones, and more particularly to a received electric field level display method.

0002

2. Description of the Related Art A portable radio telephone has an integrated structure including a radio, a telephone, a battery, an antenna, etc., and usually has a built-in display section. A liquid crystal display device is used as the display section in consideration of reducing power consumption. by this,
It allows you to check the correct key operations, status display, phone number, etc. when making and receiving calls. Further, for convenience, the received electric field level is always displayed on the liquid crystal display section using a level bar of about 5 levels so that the user can determine whether the received electric field level is sufficient for communication.

FIG. 2 shows a received electric field level displayed on a liquid crystal display of a conventional portable radio telephone. In FIG. 2, 1 is an antenna, 2 is a receiver, 3 is a liquid crystal display section, 4 is a keypad section, 5 is a battery section, and 6 is a microphone. When the received electric field level is the strongest, all five bars light up, and when the received electric field level is weak and communication is impossible, all five bars light up.
All three bars are now turned off.

0004

However, in the above-mentioned conventional configuration, since the received electric field level is constantly displayed on the liquid crystal display, the battery is unnecessarily consumed, which is not preferable from the viewpoint of power saving. Furthermore, in the case of mobile communications, there are locations where the received electric field level drops extremely every time the receiving location is moved by approximately one wavelength of the radio frequency. For this reason, even if the received electric field level is high at the beginning of a call, the received electric field level will drop with just a slight movement (approximately a dozen centimeters in the case of the 800 MHz band), and a sudden disconnection of the line may occur during the call. In the case of mobile radio telephones, because of their one-piece structure, the handset of the main unit is placed near the ear and the microphone is placed near the mouth, so the LCD display is hidden and out of sight, making it difficult to check the received electric field level. Therefore, the user could not take any countermeasures against the problem. For this reason, there was a problem in that the line could suddenly be disconnected if the user moved even slightly during a call as described above.

[0005] In addition, as a countermeasure to the above-mentioned problem, there is a method to notify the decrease in the received electric field level using sound, but since sound is also used for other purposes, it is difficult to make an instantaneous determination.
Since they are often used outdoors, they have drawbacks such as being easily influenced by surrounding noise.

[0006] The purpose of the present invention is to solve the conventional problems,
A mobile radio that can improve the user's convenience by prompting the user to move to a place with better reception when the received electric field level drops, thereby preventing sudden line disconnections due to the lowering of the received electric field level. The purpose is to provide telephones.

[0007]

[Means for Solving the Problems] The portable radio telephone of the present invention is provided with a means for detecting voices (self, other party) during a call, so that when no voice is detected for a certain period of time, the portable radio telephone is placed against the ear. It is determined that the received electric field level is not displayed, that is, the user is in a state where the received electric field level can be confirmed on the liquid crystal display section, and the received electric field level is displayed on the liquid crystal section using, for example, a five-level level bar.

On the other hand, while the voice is being detected, it is determined that the mobile radio telephone is being held to the ear, that is, the user cannot check the received electric field level of the liquid crystal display, and the liquid crystal display is The received electric field is not displayed. As an alternative to this, by installing an alarm display means (for example, a flashing light emitting diode, or turning off when the received electric field level is sufficient) to notify of a drop in the received electric field near the microphone, the mobile wireless phone can be used even when the phone is held to the ear. Allows the person to visually check whether the received electric field level is sufficient.

[0009]

[Function] According to the above method, the received electric field level is not constantly displayed on the liquid crystal display during a call, so power saving can be achieved. In addition, since it is possible to constantly monitor and check whether the received electric field level is sufficient even when the mobile wireless phone is held to the ear during a call, if a received electric field level drop alarm occurs, the user can take measures to move to a place where the received electric field level is higher. It can be taken. This can prevent the line from suddenly disconnecting during a call.

0010

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is an overview diagram of a portable radio telephone including a received electric field level display according to an embodiment of the present invention, and FIG. 3 is a block diagram showing its configuration. 1 is an antenna, 2 is a receiver, 3 is a liquid crystal display that can display the received electric field level with a level bar of about 5 levels in addition to the telephone number, 4 is a keypad section, 5 is a battery section, 6 is a microphone section, 7 1 is a light emitting diode for warning of a drop in the received electric field level; 8 is an audio detection section; 9 is an audio/data processing section; 10 is a control section; 11 is a receiver; 12 is a transmitter; and 13 is an antenna duplexer.

[0011] A method of displaying a received electric field during a call will be described below. (1) When a voice (yours or the other party's) is detected.While the voice is being detected, it is determined that the mobile radio telephone is placed against the user's ear, and the received electric field level is not displayed on the LCD display 3. Instead, place it near the microphone 6 (a position that can be seen in actual use with the handset of the mobile radio telephone in the ear and the microphone near the mouth; in the figure, it is in the lower right corner, but it may be in the lower left corner or in both lower corners). ) When the received electric field level falls below a predetermined value in the light emitting diode 7 provided in the receiver, a blinking display (or lighting may be used) warns the user and urges the user to move to a place with better reception conditions.

(2) When voice (self, other party's) cannot be detected While voice cannot be detected, the handset 2 of the mobile radio telephone is in the user's ear and the microphone 6 is near the user's mouth. It is determined that the person can directly see the liquid crystal display section 3, and the received electric field level is directly displayed on the liquid crystal display section 3. When the received electric field level falls below a predetermined value, the light-emitting diode 7 can be lit together with the display on the liquid crystal display to warn the user and urge him to move to a place with better reception conditions.

[0013]

[Effects of the Invention] According to the present invention, a voice detection means is provided,
Power can be saved by suppressing the display of the received electric field level on the liquid crystal display depending on the presence or absence of audio, and the light emitting diode that warns when the received electric field level has fallen below the required value is placed in a position that can be seen even in actual use (microphone Since the new system has been installed in the area (nearby), when the received electric field level drops, the user is prompted to move to a place with better reception, thereby preventing sudden line disconnections due to the lowering of the received electric field level, and improving the convenience of the user. Can be done.

[Brief explanation of the drawing]

FIG. 1 is an overview diagram of a portable radio telephone including a received electric field level display according to an embodiment of the present invention.

FIG. 2 is an overview diagram of a conventional portable radio telephone.

FIG. 3 is a block diagram showing the configuration of a portable radio telephone according to the present invention.

[Explanation of symbols]

1... Antenna, 2... Handset, 3... Liquid crystal display section,
4...Keypad section, 5...Battery section, 6...Microphone, 7...Light emitting diode, 8...Audio detection section,
9...Audio/data processing unit, 10...Control unit, 1
1...Receiver, 12...Transmitter, 13...Antenna duplexer.

Claims (2)

[Claims] 1. A portable radio telephone comprising a means for displaying a received electric field level on a liquid crystal display, further comprising a voice detecting means, and when the voice detecting means does not detect voice for a certain period of time during a call, the received electric field level is displayed. A portable radio telephone characterized in that a received electric field level is displayed on a means. 2. The portable radio telephone according to claim 1, further comprising visible received electric field level drop alarm display means provided near the microphone in addition to the received electric field level display means.