JP3594560B2 - Electronics - Google Patents

Description

[0001]
[Industrial applications]
The present invention relates to an electronic device.
[0002]
[Prior art]
One of electronic devices (for example, telephone devices) is a mobile telephone device.
[0003]
FIG. 7 is a front view of a conventional mobile phone device.
[0004]
The telephone device illustrated in FIG. 7 includes a numeric keypad 610, a display unit 620 including, for example, a liquid crystal display device, a reception lamp 630 including, for example, an LED (Light Emitting Diode), and a speaker 640. Is irradiated with light from a backlight (not shown) provided inside the housing, and the irradiation of the light allows the user to see the display on the display unit 620.
[0005]
At the time of an incoming call, the incoming call lamp 630 is blinked to notify the user of the incoming call, the backlight of the display unit 620 is turned on, and the telephone number of the other party is displayed on the display unit 620. Notify if there is an incoming call.
[0006]
On the other hand, the incoming call lamp 630 generally performs an operation of blinking in synchronization with the timing at which a ring tone is transmitted from the speaker 640. The reason why the incoming call lamp 630 blinks is that when the incoming call lamp 630 blinks rather than constantly lighting in the same color, the user can more easily sense a change in light and recognize the incoming call more easily.
[0007]
[Problems to be solved by the invention]
Since about 2 mW to 5 mW of power is consumed by the backlight of the display unit, it is preferable that the backlight be turned off as much as possible from the viewpoint of suppressing power consumption.
[0008]
For this reason, it is easily conceivable that the backlight is not turned on at the time of the incoming call. However, if the backlight is not turned on at the time of the incoming call, the user cannot see the display on the display unit at the time of the incoming call at night. Can't tell from whom the call came.
[0009]
Although it is conceivable to blink the backlight to suppress the power consumption of the backlight, it is very difficult for the user to recognize the displayed telephone number only while the backlight is lit.
[0010]
[Means for Solving the Problems]
The present invention has been made in view of such a problem, and an electronic apparatus according to claim 1 is provided such that a liquid crystal display device requiring a backlight and a front surface of the liquid crystal display device are opposed to each other. A transparent display window, a light source that emits light, a first light guide plate that guides the light of the light source as a backlight of the liquid crystal display device, and a second light guide plate that guides the light of the light source to the display window. It is characterized by having.
[0011]
The electronic device according to claim 2, wherein the liquid crystal display device is a transflective liquid crystal, and the second light guide plate guides the light of the light source also to the front surface of the liquid crystal display device.
[0012]
According to a third aspect of the invention, there is provided the electronic apparatus, further comprising control means for controlling light emission of the light source in response to an incoming call.
[0013]
An electronic device according to a fourth aspect is characterized in that the light source is controlled so as to alternately emit light of different colors without extinction at the time of an incoming call.
[0015]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, the apparatus of this embodiment will be described.
[0016]
FIG. 1 is a perspective view of a device according to a first embodiment, which is an electronic apparatus (for example, a folded mobile phone device) to which the present invention is applied, and FIG. 2 is a rear view of the housing shown in FIG. FIG. 4 shows a perspective view. The telephone device in FIGS. 1 and 2 includes a first housing 100 having an input unit 110 including a numeric keypad and a call key, and a first display unit for displaying a number corresponding to a numeric keypad pressed when a telephone number is input. 210, a second housing 200 having a second display unit 224 for displaying the telephone number of the calling side when an incoming call is received, and a speaker 230, and the first housing 100 and the second housing 200 are connected to each other. And a hinge portion 300 to be formed.
[0017]
FIG. 3 is a sectional view of the second display portion 224 of the telephone device shown in FIG.
[0018]
On the printed circuit board 221 inside the housing, from the left side in FIG. 3, an LED 222 capable of emitting multicolor light having a light emitting region of three colors of RGB (Red, Green, Blue) is arranged. A structure in which a first light guide plate 223, for example, a second display unit 224 made of a semi-transmissive liquid crystal display device, and a second light guide plate 225 are sequentially arranged thereon.
[0019]
A transparent display window 226 made of, for example, acrylic is disposed above the second light guide plate 225 (in FIG. 2).
[0020]
The first light guide plate 223 is made of, for example, acrylic, and guides the light from the LED 222 to the second display unit 224 and irradiates the entire second display unit 224 from the back side of the second display unit 224. The second light guide plate 225 is also made of, for example, acrylic, guides light from the LED 222 to the display window 226, and irradiates the entire display window 226 with light.
[0021]
The second display unit 224 is connected to a connector 229 on the printed circuit board 221 via a flexible printed circuit board 228 on which the driver IC 227 is mounted. The driver IC 227 is driven by control from a control unit (not shown), and the second display unit 224 is driven. Characters can be displayed on the unit 224.
[0022]
FIG. 4 shows a block diagram of the apparatus of this embodiment.
[0023]
In the configuration shown in FIG. 4 and the configurations shown in FIGS. 1 to 3, the same parts are denoted by the same reference numerals.
[0024]
In FIG. 4, a transmission / reception unit 400 performs modulation / demodulation of transmission / reception signals, detection of an incoming call, detection of a telephone number of a calling side, and the like. The input unit 110 includes a numeric keypad, a call key, an off key, and the like. The first display unit 210 is driven by a drive signal from the driver IC 410, and is capable of displaying a number in response to a ten-key press at the time of calling.
[0025]
The second display unit 224 is driven by a driving signal from the driver IC 227, and displays the telephone number of the calling side detected by the transmitting / receiving unit 400 at the time of an incoming call.
[0026]
The LED 222 has light emission regions of three colors of red, green, and blue, and can emit multicolor light. The LED control section 430 drives the LED 222.
[0027]
The control unit 440 is a main CPU that controls these circuits.
[0028]
Next, the operation of the first embodiment will be described with reference to FIGS.
[0029]
When control section 440 detects a signal indicating the presence of an incoming call from transmitting / receiving section 400, it reads the calling side telephone number from transmitting / receiving section 400 and controls driver IC 227 to display the calling side telephone number on second display section 224. Display.
[0030]
Further, the control unit 440 transmits a control signal to the LED control unit 430, and the LED control unit 430 drives the LED 222 so that red and white light are alternately turned on according to the control signal (see FIG. 4).
[0031]
When the LED 222 is lit in red, the light from the LED 222 is guided by the second light guide plate 225 to turn on the entire display window 226 in red, and is guided by the first light guide plate 223 to turn on the entire second display portion 224 in red.
[0032]
On the other hand, when the LED 222 is lit white, the entire display window 226 and the entire surface of the second display unit 224 are similarly lit white (see FIG. 3).
[0033]
As described above, the user recognizes the incoming call by the blinking red and white of the display window 226, and can know who the calling side is by the calling side number display on the second display unit 224.
[0034]
As described above, the electronic device (telephone device) according to the first embodiment emits light from the LED 222 to the entire display window 226 and the entire second display unit 224 via the light guide plates 223 and 225 at the time of an incoming call. , LED 22 also serves as a light source of the display window 226 and a backlight of the second display unit 224.
[0035]
Next, a second embodiment of the present invention will be described below.
[0036]
The difference between the first embodiment and the second embodiment is that, in the first embodiment, the light from the LED 222 is applied to the display window 226 via the second light guide plate 225 and the light is emitted from the LED 222 via the first light guide plate 223. In the second embodiment, the second light guide plate 225 is not provided, but the light from the LED 222 is transmitted to the incoming lamp window 240 and the first light guide plate 223. The surface area of the window 250 was substantially the same as the surface area of the second display unit 224.
[0037]
FIG. 5 is a perspective view of the device of the second embodiment.
[0038]
In FIG. 5, on the back side of the second housing 200, a second display unit 224 for displaying a calling telephone number at the time of an incoming call is arranged, and an incoming lamp window 240 is arranged above the second display unit 224. ing.
[0039]
FIG. 6 is a sectional view of a main part of the telephone device shown in FIG.
[0040]
In the telephone device shown in FIG. 6, an LED 222 is arranged on a printed circuit board 221 on the left side in FIG. 6, and an incoming lamp window 240 is formed in a housing portion above the LED 222. In addition, a first light guide plate 223, for example, a second display unit 224 made of a semi-transmissive liquid crystal display is arranged in order on a printed board 221 substantially at the center in FIG. In addition, a display window 250 made of, for example, acrylic is fitted into the housing portion on the second display unit 224 so that a user can see the display on the second display unit 224 from outside the housing. .
[0041]
The circuit configuration of the second embodiment is the same as that of the first embodiment shown in FIG.
[0042]
Next, the operation will be described.
[0043]
When control section 440 detects a signal indicating the presence of an incoming call from transmitting / receiving section 400, it reads the calling side telephone number from transmitting / receiving section 400 and controls driver IC 227 to display the calling side telephone number on second display section 224. Display.
[0044]
Further, the control unit 440 transmits a control signal to the LED control unit 430, and the LED control unit 430 drives the LED 222 so that red and white light are alternately turned on according to the control signal (see FIG. 4).
[0045]
When the LED 222 is turned on in red, light from the LED 222 is emitted from the outside of the housing through the incoming lamp window 240 and is guided to the first light guide plate 223 to light the entire second display portion 224 in red.
[0046]
On the other hand, when the LED 222 is lit white, the incoming call lamp window 240 and the entire second display unit 224 are similarly lit white.
[0047]
As described above, the electronic device (telephone device) according to the second embodiment irradiates the entirety of the second display unit 224 with the light from the LED 222 through the light guide plate 223 and emits the light from the incoming lamp window 240 to the outside. , LED 222 also serves as a light source for an incoming call lamp and a backlight for second display unit 224.
[0048]
As described above, in the device of this embodiment, the LED 222 alternately emits red and white light at the time of an incoming call, and the light does not disappear as in the blinking operation of the light. It is possible to recognize characters and numbers displayed in the section 224.
[0049]
In addition, at the time of an incoming call, the emission color of the LED 222 changes alternately, so that the user can easily recognize the incoming call based on the change of the emission color.
[0050]
In the present embodiment, the LED 222 emits red light and white light alternately. However, the emission color is not limited to this as long as different colors are emitted alternately.
[0051]
Further, in this embodiment, the present invention is applied to a two-fold mobile telephone device, but the present invention may be applied to a straight type telephone device.
[0052]
Further, in this embodiment, the telephone device having the LED and the LCD for the incoming call lamp has been described. The present invention can be applied to and implemented in an electronic device having a display that requires light irradiation for display.
[0053]
Although the second embodiment is an embodiment using a backlight, the present invention may be applied using a front light.
[0054]
【The invention's effect】
The electronic device according to the present invention allows the user to easily recognize the operation state (for example, incoming call) of the electronic device and to recognize what is displayed on the second display unit 224, and to control the backlight. Costs can be reduced.
[Brief description of the drawings]
FIG. 1 is a perspective view of an apparatus according to a first embodiment of the present invention.
FIG. 2 is a perspective view of an apparatus according to a first embodiment to which the present invention is applied.
FIG. 3 is a sectional view of a second display unit 224 in FIG. 2;
FIG. 4 is a block diagram of the apparatus according to the embodiment.
FIG. 5 is a perspective view of a device according to a second embodiment.
6 is a sectional view of a second display unit 224 shown in FIG.
FIG. 7 is a diagram showing a conventional telephone device.
[Explanation of symbols]
222 LED
223 First light guide plate 224 Second display unit 225 Second light guide plate 226 Display window 227 Driver IC
240 incoming display window 430 three-color LED control unit

Claims (4)

A liquid crystal display device that requires a backlight, a transparent display window that is disposed to face the front surface of the liquid crystal display device, a light source that emits light, and a light source that emits light from the liquid crystal display device. An electronic apparatus , comprising: a first light guide plate for guiding light as light; and a second light guide plate for guiding light from the light source to the display window . 2. The electronic apparatus according to claim 1, wherein the liquid crystal display device is a transflective liquid crystal, and the second light guide plate guides the light of the light source to a front surface of the liquid crystal display device . The electronic device according to claim 1, further comprising control means for controlling light emission of the light source in response to an incoming call . 4. The electronic apparatus according to claim 3, wherein the control unit controls the light source to alternately emit light of different colors without extinction at the time of an incoming call .

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