JPH02100447A - Telephone set - Google Patents

Abstract

PURPOSE:To save unnecessary electric power by turning off a light emission part for backlighting in response to the time-out of a timer. CONSTITUTION:When there is a change in key input operation or hook state, a CPU 7 drives an LED 2 for backlighting by an LED driver 3 with the electric power of a power source 4 to turn on and emit the LED 2. Then the CPU 7 initializes the timer 8, which starts counting the time. Then, when there is neither a change in hook state nor key input operation, the CPU 7 makes the LED driver 3 quit driving the LED 2 for backlighting on detecting the time-out state of the timer 8 to turn off the LED 2. Consequently, a display device does no illuminate when the telephone set is not operated, namely, when its display contents need not be viewed, so the electric power is saved.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a telephone, and more particularly to a telephone having a self-generating display.

[Prior Art] Conventionally, in order to display dial number 2 protection information in a bright and easy-to-see manner, telephones that have a display device that has its own emission source, such as a backlit LCD or a fluorescent display, do not emit light. Either it's always on, or it's turned on and off by a switch.

[Problem that the invention seeks to solve] However,
In the conventional example above, if the display always emits light, it emits light regardless of whether or not the phone is being used, that is, regardless of whether or not there is a need for the light-emitting display, so the phone cannot be used. There is a drawback that power is wasted by emitting light when it is not used, that is, when the light emitting display is unnecessary.

In addition, in the conventional method of flashing the light emitting display using a switch, it is complicated to operate the switch every time you use the phone, and if you forget to turn off the switch after use, unnecessary light may emit light. However, it had the disadvantage of wasting electricity.

Means for Solving Problem U] The present invention provides a telephone having a key input means, a hook detection means, a timer means, and a display means having a liquid crystal display section and a light emitting section for a backlight. By providing a control means for operating the timer means and the backlight light emitting section based on the input means or the hook detection means, and further turning off the backlight light emitting section based on the timeout of the timer means, the necessary The backlight light-emitting section is activated at certain times to save unnecessary power consumption.

[Embodiment] Fig. 1 is a block diagram showing the configuration of an embodiment of the unreleased QF+.
(Light emitting diode), 3 is LED 1 to light emitting diode that drives the backlight LED, and the LED 2 is blinked under the control of the CPU 7. 4 is a power supply that supplies power to the LED driver 3, 5 is an LCD for display, and 6 is an LCD 5
7 is a CPU (control unit) that controls the phone, 8 is a timer that measures a certain time, 9 is a handset, 10 is a key input device such as a numeric keypad and function keys, 11 is a hook on, Hook detection device, to detect off! 2 is the M1 talk, network interface, and 13 is the telephone network.

FIG. 2 shows the external appearance of this telephone, in which 20 is a backlit LCD display, 21 is a balance key, 22 is a numeric keypad, and 9 is a handset. Figure 3 shows the LC of this phone.
Side view showing the positional relationship between D5 and backlight LED2 [
In A, 5 is the LCD for display, and 2 is the LED for backlight.
Then, when the backlight LED 2 emits light,
The LCD 5 is illuminated from the back side, making the display easier to see.

Next, the operation will be explained according to the flowchart shown in FIG. First, the CPU 7 determines whether the numeric keypad 229 function keys 21 have been operated through the key input device IO, and whether there has been a change in the hook state through the hook detection device 11, that is, from on-hook to off-hook, or from off-hook to on-hook! A check is made to see if there has been a change in E (steps 41 and 42). In addition, at this time C
PU7 turns off the backlight LED5. This check continues until a key input is performed or the hook state changes. If either is present, the CPU 7 causes the LED driver 3 to drive the backlight LED 2 with the power from the power source 4, and
is lit and emitted light (step 43). Also, CPU7
Also when detecting an incoming call from the telephone network interface 12, the process proceeds to step 343.

Next, the CPU 7 initializes the timer 8 and starts time counting (step 44). Thereafter, the presence or absence of a change in the hook-shaped ffJ (step 45) and the right y# of the key input operation (step 46) are checked, and if either is detected, the timer is initialized (step 44).
), it checks again whether there is a change in the hook state (step 45), and whether there is a key input operation (step 46), and repeats the above operations. No change in hook status < (45
), there is no key input operation (46) D checks whether the timer 8 is in a timeout state indicating that a certain period of time has passed since the timer was initialized (step 47), and if it is not in a timeout state yet. For example, the CPU 7 repeatedly checks whether the hook state has changed (45) and whether there has been a key input operation (46). When the CPU 7 detects that the timer 3 has timed out, it
The ED driver 3 is made to stop driving the backlight LED 2 and the LED 2 is turned off (step 48), and then the process returns to the initial state (step 40) and repeats the above operation.

In the above, the operation has been explained with a focus on controlling the backlight LEDs, and in parallel with this operation, the CPU 7
Various information is displayed on the D5 through the LCD driver 6. Immediately after a function key 21 is pressed, a display corresponding to the function key is displayed. For example, the abbreviated key displays the abbreviated dial number, and the redial key displays the dial number to be dialed. Furthermore, if the numeric keypad is pressed during dialing, the pressed dial number is displayed, and after the call is ended and the call is on-hook, the call time and the charge are displayed.

As explained above, in this embodiment, the CPU 7 detects on-hook and turns on the LED 2, so that the abbreviated number,
Redial numbers etc. become easier to see.

In addition, in this embodiment, an LED is used for the backlight, but this may also be an electroluminescence (EL) cold cathode tube or the like.
You can also replace it with a fluorescent display tube, etc.

As explained above in theory IJ1, when the telephone is operated, by making the indicator emit for a certain period of time after the operation,
It has the following effects.

(1) It becomes much easier to see the displayed content immediately after an operation.

(2) Most of the time, the display does not emit light when the phone is not operating, so there is no need to see what is displayed, which saves power.

(3) Since the display device stops emitting light after a certain period of time after the operation, there is no mismatch in the display device's light emission, which saves power.

(4) Since the display contents often change immediately after an operation, it is possible to remind the user of this by emitting light.

[Other Embodiments] FIG. 5 is a block diagram of another embodiment of this embodiment, and FIG. 6 is a flowchart showing the operation. The top view and side view of this embodiment are the same as FIGS. 2 and 3.

In FIG. 5, 18 is a clock. Elements common to those in FIG. 1 are given the same numbers, and their explanations will be omitted.

The operation of this embodiment will be explained based on FIG.

The CPU 7 detects incoming call, off-hook, and key input in steps 61, 62, and 64. When the CPU 7 detects off-hook by the hook detection device 11, the CPU 7 starts the clock 18.
The time is read from , the time is displayed on the LCD 5, and the LED 2 is turned on (step 63). When a key input is detected from the key input device 11 (step 64), a display is made on the LCD 5 in response to the key input (step 65). For example, when CPtJ7 detects that a speed dial button is pressed, it displays a speed dial number. The CPU 7 displays this key input for a period of time determined by a timer 8.

That is, when the CPU 7 detects a key input.

When the timer 8 is started and a timeout is detected, the time read from the clock 18 is displayed again on the LCD 5 (step 67). Then, when the CPU 7 detects the on-footer using the hook detecting head 11 (step 68), the CPU 7 turns off the LED 2.

In this way, by displaying the display corresponding to the key input at a predetermined time after the user operates the key, it is possible to display the display according to the key input by the user without wasting power. It is also possible to display the following information. Further, when off-hook for a time other than a predetermined time after key input, the time is displayed so that the user can use it as a guide to the call time.

Furthermore, by turning off the LED when on-hook, power can be saved.

Also, in one embodiment, the display in step 63 may display continuous time or actual time.

[Effects of the Invention] As explained above, the following effects can be achieved by turning off the light based on the timeout of the timer.

(1) Display contents immediately after an operation are made much easier to see.

(2) Since the display does not emit light when the phone is not operated and there is no need to look at the displayed content, power is saved.

(3) Since the display device stops emitting light after a certain period of time after the operation, there is no need to forget to stop the display device emitting light, which saves power.

(4) Since the display contents often change immediately after an operation, it is possible to remind you of this by emitting light.

[Brief explanation of the drawing]

1 is a block diagram of a telephone embodying the present invention, FIG. 2 is a top view of the telephone shown in FIG. 1, FIG. 3 is a side view of the telephone shown in FIG. 1, and FIG. 4 is a block diagram of the telephone shown in FIG. FIG. 5 is a block diagram of another embodiment of the present invention, and FIG. 6 is a diagram of an operation flowchart.
The figure is an operational flowchart of another embodiment. 2 is a backlight LED, 3 is an LED driver, 4 is a power supply, 5 is an LCD display, 6 is an LCD driver, 7 is a C
PU, 8 is a timer lO is a key input device, 11 is a hook detection device, 12 is a telephone interface, and 13 is a telephone network.

Claims (1)

[Claims] Key input means, hook detection means, timer means,
In a telephone having a display means having a liquid crystal display section and a light emitting section for a backlight, the timer means and the light emitting section for a backlight are operated based on the key input means or the hook detection means; A telephone set comprising a control means for turning off the backlight issuing section based on a timeout.