JPH0685540U - Lighting control circuit for portable wireless communication device - Google Patents

Abstract

(57) [Abstract] [Purpose] To improve the operability and prevent battery consumption when using a portable wireless communication device at night. [Structure] The electric signal (a) detected by the optical sensor (1) is input to the CPU (2). When the display section (5) requires illumination, by pressing any button of the operation key section (3), the illumination drive circuit (4) and the light emitter (6) via the timer circuit (8). ) To work. At this time, the holding time is set in the timer circuit (8), and the light emitter (6) lights up for a necessary time,
Prevent the battery (7) from draining.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a lighting control circuit for a portable wireless communication device.

[0002]

[Prior art]

 In a conventional portable wireless communication device of this type, even when the operation is performed in a dark place such as at night, a switch for specifying ON / OFF of the illumination on the display unit or an arbitrary switch operation is used.

[0003]

[Problems to be solved by the device]

 However, in the conventional technology as described above, regardless of the environment of the main body of the wireless communication device to be used (ambient lighting condition), when the lighting switch is turned on, the lighting control circuit operates and lighting is not required. Even in the environment (such as in the sun), the light emitting part was operating and wasting power. The present invention has been made for the purpose of improving such a drawback of the conventionally known lighting control circuit.

[0004]

[Means for Solving the Problems]

As shown in FIGS. 1 and 2 of the embodiment, the present invention controls the light emitting device (6) built in the communication device body ( 9 ) and detects the ambient light and dark state by the optical sensor (1). And a CPU (2) which receives the electric signal (a) from the optical sensor (1) to judge whether illumination is required, and an illumination drive circuit (4) for turning on the light emitter (6). Is a lighting control circuit of a portable wireless communication device having.

[0005]

[Action]

 When the portable wireless communication device configured as described above is used in either light or dark place, the optical sensor (1) and the CPU (2) cooperate to set a threshold value depending on the degree of light and dark. In addition, the light emitter (6) operates so as to be turned off in a bright place and to be turned on in a dark place.

[0006]

【Example】

Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings. As shown in FIG. 1, an optical sensor (1) converts a light / dark state into an electric signal (a) and inputs the converted signal to a CPU (2). However, first, when the surroundings of the communication device body ( 9 ) are in a bright state, the voltage of the electric signal (a) is monitored by the CPU (2), and when the voltage exceeds a predetermined threshold value. Does not operate the timer circuit (8) and therefore the illumination drive circuit (4) does not work, so the light emitter (6) does not light up.

Next, when the surroundings of the communication device body ( 9 ) are dark, the timer circuit (8) operates when the threshold value becomes lower than a predetermined threshold value, and any one of the operation key units (3) is operated. When the button is pressed, the operation signal (C) is output to the illumination drive circuit (4), the output (d) of the battery (7) is supplied to control the illumination drive output (e), and the display ( 5) Turn on the provided light emitter (6).

Further, the lighting time of the light emitter (6) is maintained for some time (usually about 5 seconds) after the operation of the operation key unit (3) (including power ON / OFF F etc.) is completed. Has been set, and the operation of turning off the light will start when this hold time has elapsed.

It should be noted that all the operations shown in the present invention are performed by the command of the CPU (2), but it goes without saying that normal lighting can be performed by a specific switch or the like.

Further, the CPU (2) used in the present invention can be provided with a part of the main body of the communication device body ( 9 ) for the main control.

[0011]

[Effect of device]

 As described above, according to the present invention, when a communication device is used in an environment where lighting is required, the lighting can be performed by operating any button of the communication device without operating a specific lighting switch. Because it happens, you don't have to fumble to find a particular switch, even in the dark.

Further, since the function of the optical sensor does not illuminate when used in a bright environment, it is possible to prevent unnecessary consumption of the limited battery capacity.

[Brief description of drawings]

FIG. 1 is a configuration diagram illustrating an operation of a lighting control circuit according to the present invention.

FIG. 2 is an explanatory diagram showing an embodiment of a wireless communication device according to the present invention.

FIG. 3 is a flowchart of a control program executed by a microcomputer of a lighting control circuit according to the present invention.

[Explanation of symbols]

 1 Optical Sensor 2 CPU 3 Operation Key Section 4 Lighting Drive Circuit 5 Display Section 6 Light Emitting Device 7 Battery 8 Timer Circuit 9 Communication Device Main Body

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[Procedure amendment]

[Submission date] December 10, 1993

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be corrected] Name of device

[Correction method] Change

[Correction content]

[Title of device] Lighting control circuit for portable wireless communication device

Claims (1)

[Scope of utility model registration request] 1. A built-in light sensor (1) for detecting the amount in the communication device main body (9), and, in order to operate the communication device main body (9), illumination, placed in an environment required At this time, the CPU (2) determines that the output signal of the optical sensor (1) is in the ON state by pressing one of the buttons of the operation key unit (3), and the timer circuit (8) is within the holding time. A portable wireless communication characterized in that the illumination drive circuit (4) is operated by receiving the supply of the battery (7) and the light emitting device (6) is turned on to illuminate the display unit (5) for a certain period of time. Lighting control circuit of the machine.