JPH11344958A - Information processing device with function of power supply saving - Google Patents

Abstract

PROBLEM TO BE SOLVED: To perform control of power supply saving including a frontlight of an information processing device provided with a reflection type liquid crystal display device. SOLUTION: As for a reflection type liquid crystal display device 15, display contents can be read without turning on a frontlight 14 when surrounding is sufficiently bright. Whether the frontlight 14 is turned on or not is controlled by a switching state of on/off of an input switch 21 or surrounding brightness sensed by an optical sensor 27. When a user does not operate an input device 12 for a fixed time, a switch circuit 18 is turned off and the device enters into a power management state in which the frontlight 14 is turned off. When a user operate the input device 12, the switch circuit 18 is turned on and a resume processing is performed. Since the frontlight 14 is not turned on in a situation in which it is not necessary to turn on, effective power consumption saving is realized.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an information processing apparatus having a power saving function for automatically reducing power consumption when an input operation from a user to the information processing apparatus is not performed for a predetermined time or longer. .

[0002]

2. Description of the Related Art An information processing apparatus such as a personal computer, particularly a portable information processing apparatus which operates using a battery as a power supply, is often provided with a power saving function called a power management function. The power saving function reduces the power consumption of various devices connected inside or around the information processing apparatus when the following events occur. When the user does not perform any input operation for a certain period of time When shifting to battery drive (when AC is disconnected) When battery power drops below a certain value in battery drive

[0003] Microsoft Corp., a representative operating system for today's personal computers,
Windows 95 or the like of Oration has a function of controlling power supply to a disk device, a display device, and the like. Control of the display device is not only power saving,
Another object of the present invention is to prevent a screen burn-in phenomenon caused by continuously displaying the same contents for a long time on a cathode ray tube (CRT).

[0004] Today, in information processing apparatuses including personal computers, word processors, game machines, and the like, a liquid crystal display (LCD) is often used as a display, particularly when the apparatus is portable and can be operated with a battery. Liquid crystal display devices are roughly classified into two types, that is, a transmission type liquid crystal display device and a reflection type liquid crystal display device. In a transmissive liquid crystal display device, a light source generally called a backlight is used. In a reflective liquid crystal display device, the display content is read using the brightness of external light, so that power consumption can be further reduced compared to a transmissive liquid crystal display device requiring a backlight. Japanese Patent Application Laid-Open No. 6-19024 discloses a prior art in which a liquid crystal display device can be used as a transmission type or a reflection type by attaching and detaching a reflection plate. In a transmissive liquid crystal display device, power consumption in a backlight is increased, so that a power saving function related to the backlight is provided. Prior art regarding power saving related to a backlight is disclosed, for example, in Japanese Patent No. 2702346 (Japanese Unexamined Patent Publication No.
158585), JP-A-7-140438, JP-A-8-
21360 and the like. The power saving function is also called a power management (hereinafter sometimes abbreviated as “PM”) function.

FIG. 7 shows a configuration related to a power management function relating to a backlight in a conventional transmission type liquid crystal display device. An input device 1 including a keyboard, a mouse, and the like is provided for a user to perform an input operation. When an input operation is performed on the input device 1, an input generation signal 1
s is output from the input device 1. The timer 2 generates a fixed period signal 2s. The idle detection unit 3 includes the input device 1
When the number of times that the fixed cycle signal 2s is input from the timer 2 after the input generation signal 1s is input exceeds the PM operation set value, the idle state of the input device 1 in an unused state is detected. The idle counter 3b is used to count the constant period signal 2s. When the count value becomes equal to or larger than the PM operation set value 3a, an idle detection signal 3s is output.

The input generation signal 1 output from the input device 1
s is also given to the resume processing unit 4. The idle detection signal 3s from the idle detection unit 3 is given to the PM operating unit 5. The resume processing unit 4 outputs an ON control signal 4s for turning on the backlight. PM operation part 5
Outputs an OFF control signal 5s for turning off the backlight. ON / O backlight of transmissive liquid crystal display
A switch to be controlled by the FF (hereinafter sometimes abbreviated as “SW”) is provided in the backlight SW circuit 6. When the ON control signal 4 s is given to the backlight SW circuit 6, the backlight is turned on and turned on. When an OFF control signal 5s is given to the backlight SW circuit 6, the backlight is turned off and turned off. The ON control signal 4s and the OFF control signal 5s from the resume processing unit 4 and the PM operating unit 5 are also given to the other peripheral devices 7, respectively.

FIG. 8 shows a control procedure of the configuration of FIG. FIG. 8A shows an interrupt processing procedure when a constant-period signal 2 s generated at regular intervals from the timer 2 is input to the idle detector 3 as an interrupt signal. Step a1
Then, the count value of the idle counter 3b is incremented and increased. In step a2, the result of incrementing the idle counter 3b and the PM operation set value 3a
Then, it is determined whether or not to shift to the power saving mode. When it is determined that the count value of the idle counter 3b is equal to the PM movable set value 3a,
In step a3, entry into the PM mode for shifting to the power saving mode is determined, and the PM operating unit 5 receives the idle detection signal 3
s. After the notification in step a3 is made, or when it is determined in step a2 that the value is not equal to the set value, the interrupt control based on the constant period signal 2s from the timer 2 ends. In the PM operating unit 5 of FIG. 7, the backlight SW circuit 6 and other peripheral devices 7 are
An FF control signal 5s is given to execute power saving control of various devices set to perform PM processing. The backlight SW circuit 6 controls the backlight power supply circuit switch or the brightness adjustment circuit to be turned off. Actually, it is performed as input / output (hereinafter sometimes abbreviated as “I / O”) processing with respect to a display controller of the liquid crystal display device.

FIG. 8B shows an interrupt operation by the input generation signal 1 s from the input device 1 to the idle detecting unit 3 when the user performs an input operation on the input device 1.
In response to the input generation signal 1s, the idle detector 3 initializes the idle counter 3b. Therefore,
The count value of the idle counter 3b is equal to the PM operation set value 3a.
The above is when the input operation on the input device 1 is not performed for a certain period of time represented by the product of the period of the input generation signal 1s and the PM operation set value 3a. That is, "If no user operation occurs for a certain period of time, the backlight is turned off.
FF state "is realized. When the input operation is performed and the input generation signal 1s is output from the input device 1, the resume processing unit 4 also performs an interrupt process, and
The ON control signal 4s is given to the backlight SW circuit 6 and other peripheral devices 7 in the
Return from the M state. In this way, the control of "when the user input from the user is started, the backlight is turned on" is realized.

In the prior art of Japanese Patent No. 2702346,
At the time of power saving control of the backlight related to the transmissive liquid crystal display device, even if the user operates the power switch or the reset switch, it is not accepted. Even in the power saving mode, data corresponding to a running state of a personal computer or the like is stored in a central processing unit (hereinafter abbreviated as “CPU”) or a memory. If the power is turned off or the reset state occurs, stored data is lost. Therefore, even if the user operates the power switch or the reset switch carelessly, it is not accepted.

When a reflective liquid crystal display device is used, a backlight is basically unnecessary, so that a power management function for the backlight is unnecessary. However, the visibility of the display screen of the reflective liquid crystal display device changes depending on the ambient brightness. Japanese Unexamined Utility Model Publication No. Hei 6-19024 discloses a prior art in which a light receiving element is arranged near a reflective liquid crystal display screen, the surrounding brightness is detected by the light receiving element, and a power switch is ON / OFF controlled based on the result. Have been. When the surrounding brightness is insufficient, an auxiliary illumination called a front light is provided in the vicinity of the reflection type liquid crystal display device to compensate for the insufficient brightness to make the display screen easier to see. Note that Japanese Patent Application Laid-Open
No. 152197 discloses a prior art relating to a traffic lighting system in which a secondary battery is charged with electric power generated from a solar cell and a lighting operation is performed only when a human body is detected at night.

[0011]

In a reflection type liquid crystal display device, although the display content can usually be recognized by external light, there is a problem that the display content is difficult to see when the external light is weak. In order to solve this problem, a general method is to provide a front light which is an auxiliary light for illuminating the display surface brightly, and a solution is to "light on when dark". However, in spite of using a reflective liquid crystal display device to save power as an information processing device, providing an auxiliary light and turning it on naturally increases power consumption as a whole. I will.

[0012] Even in a backlight of a transmissive liquid crystal display device,
The problem of power consumption exists, and as a solution,
As described above, if no user operation such as keyboard operation is performed by the user for a certain period of time, the backlight is turned off, and the user usage state is managed so that the backlight is turned on when the user operation occurs again And reduce the power consumption as a whole.

However, reduction of the power consumption of the front light of the reflection type liquid crystal display device cannot be solved by simply implementing the same method as that of the backlight of the transmission type liquid crystal display device. The reason is that the front light is not always turned on when the information processing apparatus is normally used. If the power saving control of the front light is performed in the same manner as the backlight, there is a problem that the front light is always turned on by a user operation on the input device by the user.

In general, when an information processing apparatus is used outdoors, it cannot be supplied with commercial AC power, and thus operates using a battery as a power supply. For this reason, the power saving function should be set to be effective for the entire information processing apparatus system so that the battery can be used for a long time with a limited battery capacity. In addition, although external light is related to time and weather, it is often brighter to use outdoors,
There should be more cases where the front light is turned off. However, with the power saving function similar to the backlight,
If the user performs a user operation after shifting to the power management state, the front light is unconditionally turned on when returning from the power management state.
It becomes a state. This means that for the user, setting the power saving function to be effective results in a very contradictory specification that shortens the life of the battery. As in the prior art of Japanese Patent Application Laid-Open No. 2-152197, the idea of turning on the illumination when a human body is sensed is not often used in an information processing apparatus. The power function becomes insufficient.

SUMMARY OF THE INVENTION An object of the present invention is to provide a power saving device capable of effectively performing power management relating to auxiliary lighting used only when normal external light does not need to be turned on and sufficient brightness cannot be obtained for display such as at night. It is to provide an information processing device with a function.

[0016]

SUMMARY OF THE INVENTION The present invention monitors an input operation state of a user, and is set in advance when an input operation is not performed for a predetermined time or during operation using a battery as a power source. In an information processing apparatus with a power saving function that shifts to a power saving mode, a display device capable of displaying with external light under normal conditions, auxiliary lighting means for illuminating a display screen of the display device, and A lighting control means for controlling a power supply state to the auxiliary lighting; and a process accompanying the transition between the power saving mode and the normal use mode. In the power saving mode, the lighting control means controls the auxiliary lighting. Even when power is supplied to the power supply, the power supply to the auxiliary lighting is reduced, and when returning from the power saving mode to the normal use mode, the lighting control means Said auxiliary Only when in a state in which power is supplied to the light, a power-saving function with an information processing apparatus which comprises a power-saving control means for controlling so as to perform power supply to the auxiliary lighting.

According to the present invention, a display device capable of displaying with external light under normal conditions is provided with auxiliary lighting means for illuminating a display screen when, for example, external light is not sufficiently obtained. The information processing apparatus starts an input operation state of the user, and when the input operation is not performed for a predetermined time or more,
Alternatively, a power saving function is provided for shifting to a preset power saving mode during operation using a battery as a power source. The power saving control means performs processing associated with transition between the power saving mode and the normal use mode. In the power saving mode, the power supply to the auxiliary lighting is performed by the lighting control unit that controls the power supply state to the auxiliary lighting according to a predetermined condition, even when the power is supplied to the auxiliary lighting. Reduce. When returning from the power saving mode to the normal use mode, control is performed so that power is supplied to the auxiliary lighting only when power is supplied to the auxiliary lighting by the lighting control unit. Therefore, the power supply is cut off in the power saving mode when the power is supplied to the auxiliary lighting, and the cutoff of the power supply is released when returning to the normal use mode. In the normal use mode, even when returning from the power saving mode to the normal use mode when the auxiliary light is not used, the auxiliary light is not used, and only when the auxiliary light is used. Since the auxiliary lighting is also performed, appropriate power saving control can be performed.

In the present invention, the display device is a reflection type liquid crystal display device. According to the present invention, since the reflection type liquid crystal display device is used as the display device, the screen display can be sufficiently read under the condition of ordinary external light without using the auxiliary illumination, and the power consumption can be reduced.
When an input operation is not performed for a predetermined time or during operation using a battery as a power source, the mode shifts to a preset power saving mode, so that power consumption can be further reduced.

Further, in the present invention, the lighting control means includes an input switch for designating, in a readable switching state, whether to supply or cut off power to the auxiliary lighting.

According to the present invention, when the user operates the input switch, the power supply to the auxiliary lighting or the cutoff thereof is performed.
It can be specified in a readable switching state.

In the present invention, the lighting control means includes a state storage means for storing a power supply state to the auxiliary lighting, and a power supply state stored in the state storage means according to a preset program. It is characterized by including a storage changing means for changing, and a storage control means for controlling a power supply state to the auxiliary lighting based on the power supply state stored in the state storage means.

According to the present invention, the power supply state is changed by the storage changing means according to a preset program, and the changed power supply state is stored in the state storage means. The storage control means can specify the power supply state to the auxiliary lighting by software based on the power supply state stored in the state storage means.

In the present invention, the illumination control means includes light sensing means for sensing the brightness of the external light and determining whether to supply power to the auxiliary lighting according to the brightness of the external light. It is characterized by the following.

According to the present invention, it is possible to specify the power supply to the auxiliary lighting according to the brightness of the external light sensed by the light sensing means.

Further, in the present invention, when the power saving control means shifts to the power saving mode by not performing an input operation for the predetermined time or more, a power supply state to the auxiliary lighting by the lighting control means is provided. At the time when the cutoff is released, control is performed so as to supply power to at least the auxiliary lighting.

According to the present invention, when the cutoff of the power supply state to the auxiliary lighting by the lighting control means is canceled during the transition to the power saving mode due to the input operation not being performed for a predetermined time or more. Since at least power is supplied to the auxiliary lighting, the display device can be illuminated by the user who turns on the auxiliary lighting.

[0027]

FIG. 1 shows a basic hardware configuration of an information processing apparatus 10 with a power saving function according to an embodiment of the present invention. Information processing device 10 with power saving function
Is a personal computer, a workstation, a word processor, a game machine, or the like, and performs information processing by a program operation of the central processing unit 11.
A user of the information processing apparatus 10 with a power saving function performs an operation instruction and data input by a user operation on the input device 12 such as a keyboard and a mouse. The display of processing contents etc.
It is controlled by the display controller 13. The display controller 13 controls the front light 14 to display an image on the reflective liquid crystal display device 15. The programs and data operated by the central processing unit 11 are stored in a ROM / RAM 1 serving as a main storage device of the information processing apparatus 10 with a power saving function.
6 is stored.

When the information processing apparatus 10 with the power saving function shifts from the normal operation mode to the power saving mode in accordance with the power saving function, the information processing apparatus 10 uses the signal generated from the timer 17 at a fixed period as a reference to the input device 12. The presence or absence of a user operation from the user. In the power saving mode, the display controller 13 stops the power supply to the front light 14 by shutting off the switch circuit 18. Switch circuit 18
Is turned on, the power supply to the front light 14 is restored to the original state. The display unit 19 includes the front light 14, the reflective liquid crystal display device 15, and the switch circuit 18. In the power saving mode, power supply to the external storage device 20 such as a hard disk is also controlled.

The front light 14 is not necessarily limited to a light that illuminates the reflection type liquid crystal display device 15 from the front, and is normally turned off and needs to be turned on as necessary when external light is weak. The lighting shall be called "front light". In this way, the control for designating the turning on or off of the auxiliary front light 14 can be designated as a switch system by the switching state of the input switch 21 which can be directly operated by the user. If the input switch 21 is ON, the front light 14 is turned on or off according to the switching state of the switch circuit 18. When the input switch 21 is in the OFF state, the front light 14 is turned off regardless of the switching state of the switch circuit 18. The display unit 19 is also provided with a main power switch 22 for controlling the entire power supply.

A power management control unit 23, a switch control unit 24, and a mode storage unit 25 are set in the ROM / RAM 16. The switch circuit 1 of the display unit 19
8, the power supply to the front light 14 is turned ON / OFF.
Although the OFF control is performed, the brightness of the front light 14 may be adjusted by using a brightness adjustment circuit instead of the switch circuit 18. This is because when the luminance is low, power consumption is reduced, and an effect of power saving can be obtained. The keyboard 26 or the optical sensor 27 can be used instead of or in combination with the input switch 21 to switch the front light 14 on or off. The keyboard 26 is set such that a plurality of keys among the keyboards provided in the input device 12 are assigned, and when the plurality of keys are operated simultaneously or in a certain order, the front light 14 can be switched by software. Is done. The switching state of the front light 14 by operating the keyboard 26 is stored in the mode storage unit 25. The optical sensor 27 senses the brightness of the surroundings and controls the front light 14 to be turned on during the night and to be turned off during the day.

FIG. 2 shows a configuration as a switch system when the front light 14 is controlled by the input switch 21 of FIG. In the ROM / RAM 16 of FIG.
An M operation set value 31 and an idle counter 32 are provided. The central processing unit 11 of FIG.
The idle detection unit 33, the resume processing unit 34, and the PM
It operates as the operating unit 35. The display controller 13 in FIG. 1 also includes an operation unit such as a CPU, a register for operation, a RAM for main storage, a ROM for storing operation processes and programs, and the like. Not only the program operation described above, but also at least a part of the idle detection unit 33, the resume processing unit 34, and the PM operation unit 35 can be realized by the components of the display controller 13. Front light SW circuit 3
6 includes the switch circuit 18 of FIG. The resume processing unit 34 and the PM operating unit 35 also control other devices 37.

In FIG. 2, the idle detector 33 is connected to the input device 1
In response to an input generation signal 12s generated in response to a user's key input, mouse input, or the like with respect to 2 and a constant period signal 17s from the timer 17, an idle state in an unused state is detected. In this embodiment, unlike the conventional configuration of FIG. 7, when switching from OFF to ON occurs at the input switch 21, a switching signal 21s indicating switching from OFF to ON is given to the input device 12. Attention. The input device 12 to which the switching signal 21s is input provides an input generation signal 12s to the idle detection unit 33 in the same manner as a key input or the like, so that the idle counter 32 is initialized in the same manner as when a key input occurs. Control is performed. Regarding the control of the idle detecting unit 33 and the PM operating unit 35, the idle detecting unit 3 and the PM
Since the control is the same as that of the operation unit 5, the description is omitted.

Next, a resume process for returning from the PM state will be described. First, when the input device 12 generates a user input including the switching of the input switch 21 from OFF to ON, the resume generation unit 34 is also supplied with the input generation signal 12 s which is supplied to the idle detection unit 33. The resume processing unit 34 performs a resume process as shown in FIG. FIG. 3A shows a control procedure of the front light 14. In step a11, first, the switching state of the input switch 21 is read from the resume processing unit 34 to acquire the operation state of the front light 14. The operation state of the front light 14 may be an ON / OFF switching state of the input switch 21 in FIG. 1 as a switch system, a storage content stored in response to an operation of a keyboard 26 as a storage system, or an optical sensor as a sensor system. 27 is determined from the state of light such as external light sensed by the light source 27. When it is determined in step a12 that the switching state is ON, the front light SW circuit 36 is controlled to be ON in step a13. Thus, the "resume operation of power saving control by turning on the front light 14 only when the front light mode is ON" can be performed. After the end of step a13 or when it is determined in step a12 that it is not ON,
The resume operation ends.

FIG. 3B shows the processing when the front light mode is switched by the switching operation on the keyboard 26 of FIG. When the keyboard 26 is operated according to the software to change the front light mode, the front light mode is stored in the mode storage unit 25 in step b1. After the front light mode is stored in the mode storage unit 25, the changed front light mode is reflected when acquiring the front light mode in step all.

FIG. 4 shows a configuration in which the front light mode is switched using the keyboard 26 of FIG. 1 as a storage system. In this configuration, parts corresponding to the configuration in FIG. 2 are denoted by the same reference numerals. Keyboard 26 of input device 12
Is performed, a switching signal 26s is provided to the resume processing unit 34. Resume processing unit 34
2 is different from the operation of the switch system in FIG. 2 in that the storage contents of the mode storage unit 25 are changed, and whether or not the front light 14 is turned on at the time of resumption is determined according to the stored front light mode 25a. It is.

FIG. 5 shows the operation of the configuration as the storage system shown in FIG. When a user operation is performed on the input device 12, an input generation signal 12s is output, and step a21 is performed.
Then, it is determined whether or not the mode switching key according to the specific combination of the keyboard 26 in the input device 12 is operated. When the operation is being performed, the mode switching occurrence notification is given to the resume processing unit 34 as the switching signal 26s in step a22. When it is determined in step a21 that the mode switching key has not been operated, only the normal input generation signal 12s is supplied to the resume processing unit 34 in step a21. In step a23, based on the input occurrence notification given as the input occurrence signal 12s,
The resume processing unit 34 starts operating. At this time, if the storage contents of the mode storage unit 25 have been changed by the mode switching occurrence notification, the resume processing is performed according to the changed contents.

FIG. 6 shows a configuration for power saving control of the front light SW circuit 36 based on the light receiving state of the optical sensor 27 of FIG. 1 as a sensor system. In this configuration, portions corresponding to the configuration in FIG. 2 or FIG. 4 are denoted by the same reference numerals, and redundant description will be omitted. In this configuration, the light sensor 27 determines whether or not to turn on the front light 14 in the state of external light, and a light-up required signal 27s indicating switching from OFF to ON is given to the input device 12. The lighting necessary signal 27s has the same function as the switching signal 21s given to the input device 12 from the input switch 21 having the configuration shown in FIG. The resume processing unit 34, when performing the resume processing,
With reference to the light receiving sensor 27, an external light state acquisition 27d is performed.

According to each of the embodiments described above, it is possible to prevent the inconvenience of turning on the front light 14 at the time of resuming in spite of the situation where the front light 14 does not need to be turned on. Information processing apparatus 1 with power saving function capable of power saving control on
0 can be realized. In addition, although the reflection type liquid crystal display device 15 is targeted as a display device, the power saving control of the auxiliary lighting can be similarly performed with other types of display devices. For example, in a transmissive liquid crystal display device,
An auxiliary backlight may be provided and controlled.

[0039]

As described above, according to the present invention, the power supply to the auxiliary lighting for illuminating the display screen of the display device as required can be effectively controlled in combination with the power saving function.

Further, according to the present invention, it is possible to perform control such that the auxiliary lighting means for lighting the reflection type liquid crystal display device is turned on when necessary, and turned off when unnecessary.

Further, according to the present invention, the power supply state to the auxiliary lighting can be controlled by software according to a program.

Further, according to the present invention, the user can specify turning on or off the auxiliary lighting by operating the input switch.

Further, according to the present invention, the power supply state to the auxiliary light-off is stored in the state storage means, and can be changed by software by the storage change means.

Further, according to the present invention, the power supply state to the auxiliary lighting can be determined according to the brightness of the external light sensed by the light sensing means.

Further, according to the present invention, even when the user enters the power saving mode when the user does not operate the input device for a certain period of time or more, the lighting control means releases the power supply to the auxiliary lighting. Thus, the auxiliary lighting can be turned on.

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating a schematic hardware configuration of an information processing apparatus with a power saving function according to an embodiment of the present invention.

FIG. 2 is a block diagram showing a configuration for a power saving function in a switch system in the embodiment of FIG. 1;

FIG. 3A is a flowchart illustrating a resume operation of the configuration of FIG. 2; (B) is a flowchart showing an operation when the front light mode is switched by a switching operation on the keyboard.

FIG. 4 is a block diagram showing a power saving control function in a storage system in the embodiment of FIG. 1;

FIG. 5 is a flowchart showing an operation related to the input device 12 in the configuration of FIG.

FIG. 6 is a block diagram showing a configuration for power saving control in a sensor system in the embodiment of FIG. 1;

FIG. 7 is a block diagram illustrating a configuration for performing power saving control of a backlight in an information processing apparatus including a conventional transmissive liquid crystal display device.

FIG. 8 is a flowchart showing an operation of the idle detecting unit 3 of FIG. 7;

[Explanation of symbols]

 Reference Signs List 10 Information processing device with power saving function 11 Central processing unit 12 Input device 13 Display controller 14 Front light 15 Reflective liquid crystal display device 16 ROM / RAM 17 Timer 18 Switch circuit 21 Input switch 25 Mode storage unit 26 Keyboard 27 Optical sensor 31 PM Operation setting value 32 Idle counter 33 Idle detection unit 34 Resume processing unit 35 PM operation unit 36 Front light SW circuit

Claims (6)

[Claims] 1. A power saving mode for monitoring a user's input operation state and shifting to a preset power saving mode when an input operation is not performed for a predetermined time or during operation using a battery as a power source. In an information processing device with a function, a display device capable of displaying with external light under normal conditions, auxiliary lighting means for illuminating a display screen of the display device, and a power supply state to the auxiliary lighting according to preset conditions. Lighting control means for controlling; and performing a process associated with a transition between the power saving mode and a normal use mode. In the power saving mode, a state in which power is supplied to the auxiliary lighting by the lighting control means. Even when the power is supplied, the power supply to the auxiliary lighting is reduced, and when returning from the power saving mode to the normal use mode, power is supplied to the auxiliary lighting by the lighting control unit. To An information processing apparatus with a power saving function, comprising: a power saving control unit that controls so as to supply power to the auxiliary lighting only when the state is in a state. 2. The information processing apparatus with a power saving function according to claim 1, wherein said display device is a reflection type liquid crystal display device. 3. The power saving function according to claim 1, wherein the lighting control means includes an input switch for designating a supply or a cutoff of power to the auxiliary lighting in a readable switching state. Attached information processing device. 4. The lighting control means includes: a state storage means for storing a power supply state to the auxiliary lighting; and a power supply state stored in the state storage means according to a preset program. 4. The storage control device according to claim 1, further comprising a storage change unit, and a storage control unit that controls a power supply state to the auxiliary lighting based on the power supply state stored in the state storage unit. An information processing device with a power saving function according to any one of the above. 5. The lighting control unit senses the brightness of external light and determines whether to supply power to the auxiliary lighting.
The information processing apparatus with a power saving function according to any one of claims 1 to 4, further comprising a light sensing unit that determines the brightness according to the brightness of external light. 6. The power saving control means shuts off a power supply state to the auxiliary lighting by the lighting control means when shifting to a power saving mode due to no input operation being performed for a predetermined time or more. The information processing apparatus with a power saving function according to any one of claims 1 to 5, wherein control is performed so as to supply power to at least the auxiliary lighting at the time when the power is released.