JP3565295B2 - Mobile phone - Google Patents

Description

[0001]
[Industrial applications]
The present invention relates to a mobile phone.
[0002]
[Prior art]
A mobile phone is generally provided with an LCD so that various information such as a telephone number can be displayed. Further, in order to make the display visible even in a dark place, a so-called backlight that illuminates from the back of the LCD is provided.
[0003]
[Problems to be solved by the invention]
However, when an LED is used as the backlight, the life is long, but there are problems in brightness, lighting quality, and the like. In particular, if the thickness of the light guide plate is reduced in order to reduce the size of the mobile phone, the brightness becomes insufficient and unevenness occurs.
[0004]
On the other hand, if a miniature light bulb (small incandescent light bulb) is used as the backlight, the required brightness can be obtained, but since the life is short, it cannot be used for a long time. That is, when the mobile phone is mounted on the vehicle, the power is taken from the car battery by using the vehicle-mounted accessory (vehicle adapter), so that it is not necessary to consider the consumption of the battery built in the mobile phone. Therefore, in consideration of use at night, the backlight is always turned on when the vehicle is mounted. Therefore, if a bean ball with a short life is used as a backlight, it cannot be used for a long time.
[0005]
Further, not only the LCD, but also dial keys and various operation keys require illumination.
[0006]
The present invention is intended to solve the above problems.
[0007]
[Means for Solving the Problems]
Therefore, in the present invention,
An LCD for displaying various information;
A small incandescent bulb that illuminates this LCD,
Multiple keys,
LED for illuminating the key,
When not connected to an external power supply, at the time of key input by the key and at the time of incoming call, the small incandescent lamp and the LED are lit for a predetermined time,
When connected to an external power source, the LED is always lit, and the small incandescent light bulb is lit only for a predetermined time when a key is input by the key or when a call is received. Things.
[0008]
[Action]
When the mobile phone is used alone, the keys and the LCD are illuminated only for a predetermined period at the time of key input and call reception, and when the mobile phone is used in a vehicle, the keys are constantly illuminated. The LCD is illuminated for a predetermined period at the time of key input and incoming call.
[0009]
【Example】
FIG. 2 shows an example of the appearance of a mobile phone according to the present invention and an example of a circuit of an on-vehicle accessory. Reference numeral 10 denotes the mobile phone, and reference numeral 50 denotes an on-vehicle accessory.
[0010]
In the mobile phone 10, the box 11 of the main body is formed of a plastic material as a whole in a flat rectangular parallelepiped shape, a transmitting / receiving antenna 12 is provided on an upper surface thereof, and a speaker 13 for a handset is provided on the front thereof. An LCD 14 for displaying information, a dial key 15 and various operation keys 16 are provided.
[0011]
Further, a microphone 17 for a transmitter is provided on the right side of the box body 11, for example, so that it can be pulled out. That is, the microphone arm 18 is formed in a cylindrical shape from a plastic material having elasticity, and the lower end of the microphone arm 18 is rotatably attached to the lower portion of the right side surface of the box 11, and the upper end thereof is indicated by a broken line. As described above, the microphone 17 is built in. In this case, the microphone arm 18 is rotatable in a plane including the right side surface of the box 11 and on the front side of the box 11.
[0012]
Thus, the microphone arm 18 is located on the right side of the box 11 in the first state, and is rotatably pulled out to a position substantially 180 ° with respect to the front of the box 11 in the second state. When the microphone arm 18 is pulled out, the length of the microphone arm 18 and the like is set such that the distance between the speaker 13 and the microphone 17 is approximately equal to the distance between a transmitter and a receiver of a general telephone. I have.
[0013]
Further, a connector jack 19 for connecting an in-vehicle accessory 50 or the like is provided on the lower surface of the box 11.
[0014]
The signal system of the mobile phone 10 is configured, for example, as shown in FIG. That is, the mobile phone 10 is provided with a baseband circuit 21 for processing a baseband signal such as an audio signal or data for transmission or reception, and a high-frequency circuit 22 for transmitting or receiving the baseband signal. Can be Further, switch circuits 23 and 24 for switching the mobile phone 10 between the single mode and the in-vehicle mode are also provided.
[0015]
Further, the mobile phone 10 is provided with a microcomputer 30 for system control. The microcomputer 30 has a CPU 31, a ROM 32 and a RAM (not shown) in which various programs are written, and controls the channels used by the high-frequency circuit 22, the transmission and reception thereof, and the like. Control and data access through the baseband circuit 21 are performed.
[0016]
The ROM 32 is provided with, for example, a routine 100 shown in FIG. 3 as a part of the program written therein. Note that this routine 100 is an excerpt showing processing related to illumination of the LCD 14, the dial keys 15, and the operation keys 16.
[0017]
Further, the switch circuits 23 and 24 are controlled by the microcomputer 30, and the outputs of the dial keys 15 and the operation keys 16 are supplied to the microcomputer 30.
[0018]
The LCD 14 is of a backlight type, and is provided with a light guide plate (not shown) and a miniature light bulb (small incandescent light bulb) 41 as the backlight. A driving transistor 42 is connected to the miniature bulb 41, and the microcomputer 42 is controlled to be turned on and off by the microcomputer 30.
[0019]
Further, the dial key 15 and the operation keys 16 are such that the entire area of the key top or at least a part of the key top, for example, a part of characters (including numbers and symbols) written on the key top is transparent or translucent. At the same time, LEDs 43A to 43N are provided on the dial keys 15 and the operation keys 16 as their backlights.
[0020]
In this case, one of the LEDs 43A to 43N may correspond to one of the dial keys 15 and one of the operation keys 16, and one LED may correspond to a plurality of keys.
[0021]
The driving transistors 44A to 44N are connected to the LEDs 43A to 43N, and the microcomputer 30 controls on / off of the transistors 44A to 44N.
[0022]
Further, the connector jack 19 has contacts A to F, and these contacts A to F are connected to respective circuits. Although the details will be described later, when the mobile phone 10 is connected to the on-vehicle accessory 50, a voltage VST of a predetermined level is supplied from the on-vehicle accessory 50 to the contact F of the connector jack 19, and the microcomputer 30 Is configured to know whether or not the mobile phone 10 is connected to the in-vehicle accessory 50.
[0023]
On the other hand, as shown in FIG. 2, for example, in the on-vehicle accessory 50, the main body device 51 has amplifiers 52 and 53, a constant voltage circuit 54, and the like, and is provided between the driver's seat and the passenger seat or under the dashboard. Provided. A connector plug 61 connected to the connector jack 19 of the mobile phone 10 is pulled out from the main body device 51 through a cable cord 62. The connector plug 61 has contacts A to F connected to the contacts A to F of the connector jack 19.
[0024]
In addition, a hands-free microphone 63 and a speaker 64 are connected to the amplifier 52 and the amplifier 53. In addition, the microphone 63 and the speaker 64 are attached to arbitrary places in a vehicle according to a user's preference.
[0025]
Further, a transmission / reception antenna 65 is connected to the main unit 51, and the transmission / reception antenna 65 is mounted on a trunk room of an automobile or the like. Further, the voltage from the car battery 66 is supplied to the constant voltage circuit 54 and stabilized at a predetermined voltage, and this voltage is taken out to the connector plug 61 for the power supply of the mobile phone 10 and is connected to the connector plug 61 as the status signal VST. Output to the plug 61.
[0026]
According to such a configuration, when the connector plug 61 is connected to the connector jack 19, the voltage VST from the constant voltage circuit 54 is supplied to the microcomputer through the contact F of the connector plug 61 and the contact F of the connector jack 19. 30. However, when the connector plug 61 is not connected to the connector jack 19, no voltage is supplied to the contact F of the connector jack 19.
[0027]
Therefore, by checking the voltage level of the contact F of the connector jack 19, the microcomputer 30 can know whether the mobile phone 10 is connected to the in-vehicle accessory 50 or whether the mobile phone 10 is a single unit.
[0028]
When the mobile phone 10 is a single unit, the microcomputer 30 connects the switch circuits 23 and 24 to the state shown in FIG. Therefore, the user's own audio signal is supplied from the microphone 17 to the baseband circuit 21 through the switch circuit 23, and the transmission process is performed. Then, the processed audio signal is supplied to the high-frequency circuit 22 to be an up-channel transmission signal, and this transmission signal is supplied to the transmission / reception antenna 12 through the switch circuit 24 and transmitted to the base station.
[0029]
Further, a transmission signal of a downlink channel from the base station is received by the transmission / reception antenna 12, and the received signal is supplied to the high-frequency circuit 22 through the switch circuit 24 to extract an audio signal of the other party. The signal is supplied to the circuit 21 and the processing at the time of reception is performed. Then, the processed audio signal is supplied to the speaker 13 through the switch circuit 23.
[0030]
Thus, when the mobile phone 10 is a single unit, it can be used similarly to a general mobile phone.
[0031]
On the other hand, when the mobile phone 10 is connected to the in-vehicle accessory 50, the switch circuits 23 and 24 are connected by the microcomputer 30 in a state opposite to that shown in the figure.
[0032]
After the output voltage of the car battery 66 is stabilized by the constant voltage circuit 54, the output voltage is supplied to the mobile phone 10 through the connector plug 61 and the connector jack 19 as the operating voltage.
[0033]
Then, at the time of a call, the own voice signal is supplied to the baseband circuit 21 through the microphone 63 → the amplifier 52 → the connector plug 61 → the connector jack 19 → the voice signal line of the switch circuit 23. In the same manner as described above, the audio signal is taken as an upstream channel transmission signal and taken out of the high frequency circuit 22.
[0034]
Then, a transmission signal from the high-frequency circuit 22 is supplied to the transmission / reception antenna 65 through the switch circuit 24 → the connector jack 19 → the connector plug 61 → the high-frequency signal line of the internal wiring of the main device 51, and transmitted to the base station.
[0035]
A transmission signal of a downlink channel from the base station is received by the transmission / reception antenna 65. Conversely, a transmission signal of the internal wiring of the main body device 51 → a connector plug 61 → a connector jack 19 → a high frequency signal line of a high frequency 22, and as a result, the audio signal of the other party is extracted from the baseband circuit 21. Then, this audio signal is supplied to the speaker 64 through the audio signal line of the switch circuit 23 → connector jack 19 → connector plug 61 → amplifier 53.
[0036]
Thus, when the mobile phone 10 is connected to the in-vehicle accessory 50, it is possible to perform a hands-free call.
[0037]
In addition to the operations described above, the illumination for the LCD 14, the dial keys 15, and the operation keys 16 is performed when the mobile phone 10 is not connected to the in-vehicle accessory 50 and when it is connected. Is controlled as follows.
[0038]
That is, when the power of the mobile phone 10 is turned on, the processing of the lighting routine 100 by the CPU 31 starts. First, in step 101, the transistors 42, 44A to 44N are turned on for, for example, 5 seconds. The LEDs 43A to 43N are lit for 5 seconds, and the LCD 14, the dial keys 15, and the operation keys 16 are illuminated for 5 seconds. Therefore, it can be confirmed that the power is turned on.
[0039]
Subsequently, the processing of the CPU 31 proceeds to step 102. In this step 102, it is checked whether or not the status voltage VST is obtained at the contact F of the connector jack 19 to determine whether or not the mobile phone 10 is connected to the on-vehicle accessory 50. It is determined whether or not the mobile phone 10 is mounted on the vehicle.
[0040]
When the mobile phone 10 is not mounted on the vehicle (when the mobile phone 10 is used alone), the process proceeds from step 102 to step 103. In this step 103, there is an input from the dial key 15 or the operation key 16. It is checked whether it is.
[0041]
If there is no key input, the process proceeds from step 103 to step 104. In this step 104, it is checked whether there is an incoming call request by looking at the data from the baseband circuit 21. The process returns from step 104 to step 102.
[0042]
In this manner, during standby, the key input of the dial key 15 and the operation key 16 and the incoming call request are monitored.
[0043]
If there is a key input or a call request, this is detected in step 103 or step 104, and the process of the CPU 31 proceeds from step 103 or step 104 to step 105.
[0044]
Then, in this step 105, the transistors 42, 44A to 44N are turned on, so that the miniature bulb 41 and the LEDs 43A to 43N are turned on, and the LCD 14, the dial keys 15, and the operation keys 16 are illuminated.
[0045]
Subsequently, the process of the CPU 31 proceeds to step 106, in which it is checked whether, for example, 10 seconds have elapsed since step 105 was executed, that is, since the miniature bulb 41 and the LEDs 43A to 43N were turned on. If not, step 106 is repeated.
[0046]
Therefore, by this step 106, the miniature bulb 41 and the LEDs 43A to 43N are turned on for 10 seconds.
[0047]
Then, after the elapse of 10 seconds, the process proceeds from step 106 to step 107. In this step 107, all the transistors 42, 44A to 44N are turned off, and thus the miniature bulb 41 and the LEDs 43A to 43N are turned off. Then, the process returns to step 102.
[0048]
Therefore, when the mobile phone 10 is used alone, when there is a key input or an incoming call to the dial key 15 or the operation key 16, the LCD 14, the dial key 15 and the operation key 16 are kept for 10 seconds from that time. Is illuminated, so that it can respond to key inputs and incoming calls even in dark places.
[0049]
On the other hand, if the mobile phone 10 is mounted on the vehicle (connected to the on-vehicle accessory 50) in step 102, the process proceeds from step 102 to step 111, in which the transistors 44A to 44N are turned on. Then, the LEDs 43A to 43N are turned on, and the dial keys 15 and the operation keys 16 are illuminated. However, the transistor 42 is kept off, and the miniature lamp 41 is not turned on.
[0050]
Subsequently, the process of the CPU 31 proceeds to step 112, where it is checked whether or not there is an input from the dial key 15 or the operation key 16.
[0051]
If there is no key input, the process proceeds from step 112 to step 112. In this step 112, it is checked whether there is an incoming call request by looking at the data from the baseband circuit 21. The process returns from step 113 to step 102.
[0052]
In this manner, during standby, the key input of the dial key 15 and the operation key 16 and the incoming call request are monitored.
[0053]
If there is a key input or an incoming call request, this is detected in step 112 or step 112, and the processing of the CPU 31 proceeds from step 112 or step 113 to step 114. Then, in this step 114, the transistor 42 is turned on,
Therefore, the miniature bulb 41 is turned on, and the LCD 14 is illuminated. At this time, the LEDs 43A to 43N are continuously turned on, and accordingly, the LEDs 43A to 43N are also illuminated.
[0054]
Subsequently, the process of the CPU 31 proceeds to step 115. In this step 115, for example, whether 10 seconds has elapsed since step 114 was executed, that is, since the miniature bulb 41 (and the LEDs 43A to 43N) were turned on. Is checked, and if it has not elapsed, step 115 is repeated. Therefore, by this step 115, the miniature bulb 41 and the LEDs 43A to 43N are turned on for 10 seconds.
[0055]
Then, after the elapse of 10 seconds, the process proceeds from step 115 to step 116. In this step 116, the transistor 42 is turned off, and thus the miniature lamp 41 is turned off. However, the transistors 44A to 44N are kept on, and therefore, the LEDs 43A to 43N remain lit, and the dial keys 15 and the operation keys 16 are illuminated. Then, the process returns to step 102.
[0056]
Therefore, when the mobile phone 10 is connected to the in-vehicle accessory 50 and used, the LEDs 43A to 43N are always lit, and the dial keys 15 and the operation keys 16 are always illuminated.
[0057]
Then, when there is a key input or a call to the dial key 15 or the operation key 16, the miniature bulb 41 is turned on and the LCD 14 is illuminated for 10 seconds from that point on, so that even in a dark place, the key input or call Can handle calls.
[0058]
Thus, according to the mobile phone 10, since the LCD 14 is illuminated by the miniature bulb 41, even if the light guide plate is thin, the LCD 14 can be illuminated with a sufficient brightness, and even illumination can be achieved. can do.
[0059]
In addition, since the illumination of the LCD 14 is set to, for example, 10 seconds when the dial key 15 or the operation key 16 is pressed or a call is received, even if the life of the miniature bulb 41 is short, it can be used for a long time. it can.
[0060]
Further, the illumination by the miniature bulb 41 is performed, for example, for 10 seconds when there is a key input and when there is an incoming call. Therefore, even when the mobile phone 10 is used alone, it is necessary to consider the consumption of the built-in battery. Absent. Further, when the vehicle is mounted on a vehicle, the dial keys 15 and the operation keys 16 are always illuminated, so that there is no problem in use at night.
[0061]
In the above description, whether or not the mobile phone 10 is connected to the in-vehicle accessory 50 is recognized based on the status voltage VST from the in-vehicle accessory 50. It is also possible to provide a switch that is mechanically turned on and off when it is not inserted, and detect from the switch output whether the mobile phone 10 is connected to the in-vehicle accessory 50.
[0062]
【The invention's effect】
According to the present invention, since the LCD 14 is illuminated by the miniature bulb 41, the quality of illumination is improved. Further, the light guide plate can be made thin. Furthermore, even if the life of the miniature bulb 41 is short, it can be used for a long time.
[0063]
Further, even when the mobile phone 10 is used alone, there is no need to consider the consumption of the built-in battery. In addition, there is no problem with use at night when the vehicle is mounted.
[Brief description of the drawings]
FIG. 1 is a system diagram showing an example of the present invention.
FIG. 2 is a diagram illustrating an example of the present invention.
FIG. 3 is a flowchart showing an example of the present invention.
[Explanation of symbols]
10 Mobile phone 13 Speaker (for receiver)
14 LCD
15 Dial keys 16 Operation keys 17 Microphone (for transmitter)
19 connector jack 21 baseband circuit 22 high frequency circuit 30 microcomputer 41 miniature light bulb (small incandescent light bulb)
43 LED
Reference Signs List 50 in-vehicle accessories 54 constant voltage circuit 61 connector plug 63 microphone (for transmitting)
64 speakers (for receiving)
66 Car Battery 100 Lighting Routine

Claims (2)

An LCD for displaying various information;
A small incandescent bulb that illuminates this LCD,
Multiple keys,
LED for illuminating the key,
When not connected to an external power supply, at the time of key input by the key and at the time of a call, the small incandescent lamp and the LED are lit for a predetermined time,
A portable telephone in which, when connected to an external power supply, the LED is always lit, and the small incandescent light bulb is lit for a predetermined time when a key is input by the key or when a call is received. The mobile phone according to claim 1,
A portable telephone in which when the power is turned on, the small incandescent lamp and the LED are turned on for a predetermined time.

Images