JP3045187B2 - Portable computer and light source control method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a light source control method suitable for an electronic organizer (portable computer) and a light source control method.
Related to portable computers .

[0002]

2. Description of the Related Art A portable computer for displaying information using an LCD can be operated by a battery so that the portable computer can be used even in the absence of a power supply source. However, when the LCD is illuminated with a so-called backlight using this battery, a large amount of power is consumed and the battery life is shortened. Therefore, a device that automatically turns off the backlight when the keyboard is not operated for a predetermined time or longer is known. In this device, when a predetermined input is performed again from the keyboard in a state where the backlight is turned off, the backlight is turned on again. In this way, the battery is prevented from being consumed more than necessary.

[0003]

However, a smaller portable computer having no keyboard does not have a keyboard, so that when the keyboard is operated, the backlight which has been turned off is turned on again. Can not. Therefore, for example, when the backlight is turned off as a result of no input for a predetermined time, a switch for turning on the backlight again can be specially provided. However, such a configuration not only increases the number of parts and increases the cost, but also hinders downsizing.

[0004] The present invention has been made in view of such a situation, and it is an object of the present invention to reduce power consumption more than necessary without increasing the size or increasing the number of parts even in a device having no keyboard. Is made possible.

[0005]

A porter according to claim 1.
Bull computer inputs coordinate information by pen operation
Tablet and the back of the tablet
And display them according to the input from the tablet.
LCD and the light that illuminates the LCD
Source and tablet pixel detection area.
And always monitor the position where the pen is down on the tablet
Monitoring means to perform and icon images for performing predetermined settings
And the window image related to the icon image
A first control for controlling the display so as to be displayed on the display
Control means and the setting change displayed on the LCD display.
For operations on the tablet using the pen corresponding to the icon
When you select the first window that controls the light source
In both cases, the tablet with the pen corresponding to the first window
Second control means for controlling the light source in response to an operation on the
Brightness setting means for setting the brightness of the light source;
Measure the time elapsed since the pen was down
Measuring means and time setting means for setting the time in advance.
The second control means performs a first operation for controlling the light source.
Display in the first window, and
On the tablet based on the operation of the pen
Settings, and the settings on the program
Display a second window to make settings for the ray,
Corresponding to the second operation unit displayed in the second window
Time setting by operating the tablet with a pen
Includes an operation in which the time is set in the step, and further includes a second control
The stage is connected to the time setting means based on the measurement result of the measuring means.
Pen set down on the tablet with the pen for a more set time
If not, the brightness of the light source is adjusted by the brightness setting means.
Reduce the brightness from the set brightness and
When the pen is lowered, the monitoring means
Brightness setting when pen down is detected
To turn on with the brightness of the light source set by the means
It is characterized in that the light source is controlled. The light source is the backlight
Can be. Portable computer
Battery to supply power to the backlight
AC adapter that supplies power to the remounting part and backlight
And an AC adapter connection terminal for connecting the
Control means is battery is mounted in the battery mounting unit
When power is supplied and when the AC adapter connection terminal is
When the AC adapter is connected and power is supplied
The control of the backlight lighting in different ways
Can be set. Second control means
May be to control the light source to include off
it can. The light source control method according to claim 5, wherein the predetermined setting
Icon images and related icon images
Window image on the LCD
A first control step of controlling display on the LCD;
The pen corresponding to the setting change icon displayed on the ray
The first window corresponding to the operation on the tablet by
To select the first window on the LCD
A second control step of controlling the display to be displayed
And a first operation unit for controlling the light source in a first window
Control step for controlling the display so that the
Operation on the tablet and the pen on the tablet
Compare with the measured elapsed time since the pen was down
To set the time for the program as the first
Set in the processing of the setting step and the first setting step.
Did not pen down on the tablet with the pen for a while
The brightness of the light source by the brightness set by the brightness setting means.
To reduce the brightness of the light source.
Monitor, the pen moves down to the tablet
When the brightness setting is detected,
Control the light source so that it lights at the specified light source brightness
And a fourth control step. Control
Tep to control the light source to include turning off
be able to. Light source control method adapts to electronic organizer
be able to. The light source control method is
When power is supplied and a battery is attached,
Power is supplied by connecting an AC adapter to the adapter connection terminal
The backlight control when the
A second window for setting the
Fifth control screen for controlling display to be displayed on the spray
Step and the second operation unit displayed in the second window
In response to pen operation on the corresponding tablet,
Setting step for setting the lighting control of the backlight
And the fourth control step includes a second setting step.
Tsu based on settings in the process of flops, to control the backlight
You can make it.

[0006]

The portable computer and the light source having the above configurations are provided.
In the control method , a light source for illuminating the liquid crystal display is controlled in accordance with an input to the tablet. Therefore,
Unnecessary power consumption can be suppressed without increasing the size of the device.

[0007]

FIG. 1 is a perspective view showing the configuration of an embodiment in which the input display control device of the present invention is applied to an electronic organizer (portable computer). The main body 1 is provided with a power switch 2, which is turned on when the apparatus is used and turned off when the use is stopped. Provided on the left of the power switch 2 is a brightness adjustment switch 3 for adjusting the brightness of the screen 8 (the brightness of the LCD 22 described later). A case 4 is provided on the side of the main body 1. The case 4 has a switch 7 at the tip, and a main body 1 through a cord 5.
Is stored when not in use. When the pen 6 is taken out of the case 4, it can be arranged in a groove 10 formed horizontally above the main body 1. A speaker 9 is provided on the left side of the groove 10 to output a predetermined sound.

Two switches 1 are provided on the upper right side of the main body 1.
1 and 12 are provided. The switch 11 is a changeover switch for changing the brightness of the backlight described later, for example, to two levels, and the switch 12 is a volume changeover switch for changing the volume of the sound output from the speaker 9 to, for example, three levels. Switch 13 provided on left side of main body 1
Is a stop switch that is operated when a predetermined operation is stopped halfway (for example, when a sound being emitted is stopped). A memory (IC) card 70 is also provided on the left side of the main body 1.
(See FIG. 5). A socket 15 is provided on the rear side of the main body 1. A socket 16 is also provided inside the battery mounting portion 1a for mounting the battery 19 on the rear side of the main body 1. For example, RS2
A 32C cable, a modem, other adapters, and the like are connected. Further, a connection terminal 18 of an AC adapter 17 is provided above the left side of the main body 1.

FIG. 2 shows a more detailed configuration example of the screen 8. In this embodiment, the tablet 21 (X
The tablet 21a for detecting the position in the axial direction and the tablet 21b) for detecting the position in the Y-axis direction are provided at the top. An LCD 22 is provided below the tablet 21. The LCD 22 is composed of glass plates 22a and 22b provided above and below, and a liquid crystal 23 inserted between them. A fluorescent plate (EL) 26 is provided below the LCD 22. When the fluorescent plate 26 as the backlight generates light, the light is transmitted to the LCD.
Illuminate 22. Since the tablets 21a and 21b are formed of a transparent member, an image displayed on the liquid crystal 23 is observed from above in the figure. Printed circuit board (PC
B) 25 is loaded with a component (not shown) and is electrically connected to the LCD 22 via a rubber connector 24. Further, the conductive film 27 is also electrically connected to the tablet 21.

FIG. 3 shows a more detailed configuration example of the fluorescent plate 26. In this embodiment, an insulating film 33 is disposed between an electrode 31 and a light emitting section (the other electrode) 32. By applying a predetermined voltage between the electrode 31 and the light emitting unit 32, the light emitting unit 32 emits light. The electrode 31 and the light emitting section 32 are formed in a plate shape, and can irradiate the screen 8 uniformly.

As a backlight, a fluorescent tube may be used. In addition, a fluorescent tube is provided as a side light on the side of the main body, and the light is transmitted to the LC by a light transmitting member.
It is also possible to transmit to the rear of D22 so that it can be illuminated.

FIG. 4 shows the position detection by a tablet and LC
FIG. 4 is a circuit diagram showing the principle of display by D. Tablet 2
1 has, for example, 512 electrodes in the X-axis direction,
It has 342 electrodes in the Y-axis direction. This allows
It becomes possible to detect 512 × 342 pixels. The tablet controller 46 controls the clock generation circuit 45a, and sequentially applies a predetermined voltage to each of the 342 electrodes. Next, the clock generation circuit 45b is controlled,
Voltage is sequentially applied to the twelve electrodes. That is, the tablet 21 is scanned by the clocks generated by the clock generation circuits 45a and 45b. When the pen 6 approaches a predetermined position on the tablet 21, a predetermined capacitance is formed between the tablet 21 and the pen 6. When the pen 6 is pressed against the tablet 21, the switch 7 at the tip of the pen 6 is turned on, so that a charge generated between the pen 6 and a predetermined electrode on the tablet 21 is detected. It is supplied to the controller 46. Since the tablet controller 46 manages the clock generation timing of the clock generation circuits 45a and 45b, the tablet controller 46 can detect the pressed position on the tablet 21 by the pen 6 from the detection signal supplied from the pen 6 and the clock generation timing. it can. The tablet controller 46 supplies the operation coordinates of the pen 6 thus detected to the CPU 41. CPU4
1 is always monitoring the position where the pen 6 presses the tablet 21 and the switch 7 is turned on (pen down), and the position where the pen 6 is separated from the tablet 21 and the switch 7 is turned off (pen up). Then, input is accepted by pen down, and input is confirmed by pen up.

On the other hand, the CPU 41
3 and writes data corresponding to the image to be displayed in the memory (V-RAM) 44. LCD controller 4
3 reads data from the memory 44 and supplies a signal corresponding to the data to the drive circuit 42b. LCD 22
It has 512 electrodes in the horizontal direction and 342 electrodes in the vertical direction corresponding to the tablet 21. The drive circuit 42a sequentially applies a predetermined voltage to 342 electrodes one by one. Further, the drive circuit 42b sequentially applies voltages corresponding to image data to the 512 electrodes. Thus, each pixel on the LCD 22 is scanned, and the LCD 22 is scanned.
A predetermined image is displayed on 22.

FIG. 5 shows a more detailed electrical configuration of the main body 1. The CPU 41 is connected to various ICs via a bus line 57. In the ROM 51, for example, a kana-kanji conversion program for a word processor function and a dictionary table therefor, as well as a recognition program for handwritten input and a dictionary table therefor are written, in addition to the system program of the entire apparatus.
The working RAM 52 stores data necessary for operation as needed. A backup battery 54 (a battery different from the battery 19) is connected to the backup RAM 53, so that necessary data is backed up even when the power of the apparatus main body is turned off. The timer IC 55 is connected to the battery 54, counts the clock from the crystal oscillator 56, and outputs data of the date and time at that time. LC described above
The D controller 43 and the tablet controller 46 are also
It is connected to the CPU 41 via the bus line 57.

The audio processing circuit 58 includes sockets 14 to 1
A predetermined audio signal is generated in response to an input from the CPU 6 or a command from the CPU 41 and output to the adder 59. The voice memory 61 is controlled by the CPU 41 and outputs a predetermined voice (for example, a warning sound “Eh?”) Stored in advance to the adder 59. The adder 59 adds the output of the audio processing circuit 58 and the output of the audio memory 61 and outputs the result to the speaker 9 via the audio volume controller 60. The volume controller 60 is connected to the volume selector switch 12, and the volume can be controlled by operating the switch.

A power supply circuit 64 (when the power switch 2 is turned on, the battery 1
9 or power supplied from the AC adapter 17) is supplied via the inverter circuit 63. The brightness of the fluorescent screen 26 can be switched between two levels (for example, a brightness suitable for a bright room and a brightness suitable for a dark room) via the inverter circuit 63 by switching the changeover switch 11. In addition, by controlling the brightness adjustment switch 3, the brightness of the LCD 22 can be controlled to a desired value in multiple steps. The switch 65a is turned on / off according to whether the battery 19 mounted on the main body 1 is a primary battery or a secondary battery. The switch 65b detects the capacity of the battery 19, and is turned on / off according to the size of the capacity. These switches 65 a and 65 b are connected to the key interface 62 via the power supply circuit 64. The key interface 62 is also connected to the brightness adjustment switch 3, the changeover switch 11, the stop switch 13, and the like. The key interface 62 supplies signals corresponding to ON / OFF of these switches to the CPU 41.

An IC card 70 is connected to the socket 14, and the CPU 41 can exchange data, programs, and the like with the IC card 70 via an IC card interface 66. In addition, sockets 15, 1
The adapter 6 is connected to the CPU 6 via the extension interface 68.

In this embodiment, in order to prevent unnecessary power consumption, the fluorescent screen 26 (backlight) is automatically turned off when no input is made continuously for a predetermined time or more. It has been made possible. Next, an operation for making this setting will be described. FIG.
Shows a display example of the screen 8. Icon display area 81
Are displayed with various icons 83. Further, a predetermined character string can be written in the input display area 82 by performing a predetermined input. In the state of FIG. 6, when the pen 6 is moved down to the icon “SETTING” 83 a with the pen 6, dragged as it is to the input display area 82, and pen-up is performed in the input display area 82,
As shown in FIG. 7, the setting change icon 84 is enlarged and displayed. In the case of the embodiment, this setting change icon 84 is 1
It consists of one page, and the button 85a or 85
By touching “b” with the pen 6, the display can be turned backward or forward one page at a time. In FIG. 7, the sixth page is displayed. This page is a page for controlling the backlight. To reduce power consumption, (1) a mode in which the backlight is automatically turned off when the AC adapter 17 is not connected; and (2) a mode in which the AC adapter 17 is connected. A mode to automatically turn off the backlight at any time, regardless of the presence or absence. (3) A mode in which the backlight is not automatically turned off is selected by touching the corresponding button 86a with the pen 6. Is available. In this embodiment, the mode (1) is selected. In addition, the time until the backlight is automatically turned off can be set to 20 seconds, 1 minute, or 5 minutes by touching the corresponding button 86 b with the pen 6. I have. In the case of the embodiment, it is set to one minute. That is, in this embodiment, when the AC adapter 17 is not connected and the pen 6 does not perform any input on the tablet 21 for one minute or more, the backlight (the fluorescent screen 26) is automatically turned off. Will be.

Next, a process for controlling the backlight will be described with reference to FIGS.

When the power switch 2 is turned on, first, in step S1, the setting state of the switch 11 is determined. The switch 11 is in an off state in which the fluorescent screen 26 is not turned on,
The user can select and specify one of three modes: a bright (strong) state in which the light is lit, and a dark (weak) state in which the light is dim. If the switch 11 is set to the off state, the process proceeds to step S2.
The fluorescent plate 26 is not turned on. Switch 1
If 1 is set to the bright or dark state, the process proceeds to step S3, and the setting on the program is determined. The setting on the program is, as described with reference to FIG. 7, a mode in which the backlight is automatically turned off when the AC adapter 17 is not connected.
Irrespective of the presence or absence of the connection, it means that the backlight is automatically turned off at any time or the backlight is not turned off automatically.
If the mode in which the fluorescent screen 26 is not automatically turned off is set, the process proceeds to step S4, and the mode of the switch 11 is determined again. If the switch 11 has been switched to the bright state, the process proceeds to step S5, where
U41 controls the fluorescent screen 26 via the inverter circuit 63, and turns on the fluorescent screen 26 brightly. Switch 1
If 1 has been switched to the dark state, step S6
The fluorescent screen 26 is lit dark. If the switch 11 is set to the off state, the process proceeds to step S7, and the fluorescent plate 26 is not turned on. Phosphor screen 26
If the mode in which is not automatically turned off is set, the processes of steps S4 to S7 are repeatedly executed, and when the switch 11 is switched, the fluorescent screen 26 corresponding to the setting of the switch 11 is set. Will be brightly lit, darkly lit, or turned off.

Next, when the AC adapter 17 is not mounted, if the mode for automatically turning off the light is set on the program, the process proceeds to step S8, and
It is determined whether the C adapter 17 is attached.
When the AC adapter 17 is attached, the automatic turning off is not performed after all, so the process proceeds to step S4, and as described above, the fluorescent screen 26 corresponds to the setting state of the switch 11.
Is turned on, turned on, or turned off.

A program is set to automatically turn off at any time irrespective of the presence or absence of the AC adapter 17, and a mode is set to turn off automatically when the AC adapter 17 is not installed. In step S9, if the AC adapter 17 is not attached, the process proceeds to step S9, and the setting state of the switch 11 is determined. At this time, in step S1, since it is determined that the switch 11 has been switched to the bright or dark state, the processing has proceeded to step S3 and subsequent steps.
In step S9, it is determined whether the setting state of the switch 11 is bright or dark. In the bright state, the process proceeds to step S10, and the fluorescent screen 2
6 is brightly lit. In the dark state, the process proceeds to step S11, and the fluorescent screen 26 is lit dark. In any case, the process proceeds to step S12, and it is determined whether or not the setting of the program has been changed. If the program setting has not been changed, step S13
Proceed to and set the above time (20 seconds, 1 minute or 5 minutes)
It is determined whether or not the pen 6 is pen-down on the tablet 21. For example, if the set time is set to one minute, and if one minute has not elapsed since the last time the pen 6 was pen-uped from the tablet 21, the processing of steps S12 and S13 is repeated. If there is a change in the setting of the program during this time, the process returns to step S3, and the processing after step S3 is executed.

If the pen has not been moved down on the tablet 21 for more than the set time since the last time the pen was raised, the process proceeds to step S14, where the setting state of the switch 11 is determined. If the switch 11 is set to the dark state, the process proceeds to step S15, and the fluorescent screen 2
6 is turned off. Next, the process proceeds to step S16, and it is determined whether or not the pen 6 is pen-down on the tablet 21. When the pen 6 is not pen-down on the tablet 21, step S16 is repeatedly executed. Therefore, even if the switch 11 is switched to the bright or dark state during this time, this switching is ignored and the fluorescent plate 26 remains turned off. In order to escape from this loop (light-out state), it is necessary to pen down the tablet 21 with the pen 6. When the pen down is performed, steps S16 to S17 are performed.
Then, it is determined whether the switch 11 is turned off. That is, when the user changes the switch 11 to the off state in the standby mode of step S16, the process returns to step S16 again, and it is determined whether or not the pen 6 is touched on the tablet 21. As a result, if the switch 11 is changed to the off state after the set time has elapsed while the fluorescent screen 26 is turned off, the fluorescent screen 26 will not be turned on even if the pen 6 is pen-down on the tablet 21. If it is determined in step S17 that the switch 11 has been switched to bright or dark, the process proceeds to step S17.
9 and the fluorescent screen 2 corresponding to the setting state of the switch 11.
6 will be lit in a bright or dark state.

On the other hand, if it is determined in step S14 that the switching state of the switch 11 is bright, that is, if there is no input from the pen 6 for a set time or longer, the switch 11 is set to the bright state until then. If yes, the process proceeds to step S18, and the fluorescent screen 26
Changes from light to dark. As a result, the lighting state of the fluorescent plate 26 is reduced by one step. Next, the process proceeds to step S19, and it is determined whether or not the input from the pen 6 has been made on the tablet 21 again. If there is no input, the process proceeds to step S20, and it is determined whether the set time has elapsed. If the set time has not elapsed, the flow returns to step S19, and again the tablet 2
It is determined whether there is a pen input on 1. If there is no input from the pen 6 on the tablet 21 within the set time, the process returns to step S15, and the fluorescent screen 26 is turned off. Then, the processes after step S16 are executed. Before the set time elapses, the tablet 2
If there is an input from the pen 6 on 1, the process proceeds to step S21, the lighting state of the fluorescent plate 26 is changed from a dark state to a bright state, and the process returns to step S12.

In the above embodiment, when the switch 11 is set to the bright state, the pen 6
Although the lighting state of the fluorescent plate 26 is changed from bright to dark when there is no input from the user, it is also possible to immediately change from the bright lighting state to the dark state. This can further reduce unnecessary power consumption of the battery.

In the above description, the fluorescent plate 26 is controlled in accordance with the input to the tablet. However, the tablet is not limited to the capacitance type, but may be a piezoelectric type or a type that detects light. It is clear. In addition, the fluorescent plate 26 may be a side light disposed laterally instead of a backlight disposed behind the so-called LCD 22.

[0027]

As described above, the portable computer of the present invention
According to the data and light source control method , the light source is controlled according to the input to the tablet, so that unnecessary power consumption of the battery can be suppressed without increasing the size of the device or increasing the cost. It becomes possible. Therefore, the battery can be used effectively for a longer time.

[Brief description of the drawings]

FIG. 1 is a perspective view showing the configuration of an embodiment of a portable computer to which an input display control device of the present invention is applied.

FIG. 2 is a cross-sectional view illustrating a configuration example of a screen in the embodiment of FIG.

FIG. 3 is a cross-sectional view showing one configuration example of a fluorescent plate in the embodiment of FIG.

FIG. 4 is a block diagram showing an electrical connection relationship between the LCD and the tablet in the embodiment of FIG.

FIG. 5 is a block diagram showing an overall electrical connection relationship in the embodiment of FIG. 1;

FIG. 6 is an explanatory diagram of a screen in the embodiment of FIG.

FIG. 7 is an explanatory diagram of a screen in the embodiment of FIG.

FIG. 8 is a flowchart illustrating an operation in the embodiment of FIG. 5;

FIG. 9 is a flowchart illustrating an operation in the embodiment of FIG. 5;

[Explanation of symbols]

 6 Pen 8 Screen 17 AC Adapter 19 Battery 21 Tablet 22 LCD 26 Phosphor Screen 41 CPU

──────────────────────────────────────────────────続 き Continuation of the front page (51) Int.Cl. ⁷ identification code FI G06F 15/02 310 G06F 1/00 332Z G09F 9/00 337 334G (58) Field surveyed (Int.Cl. ⁷ , DB name) G02F 1/133 535 G06F 3/033 360

Claims (8)

(57) [Claims] 1. Coordinate information is inputted by operating a pen.
The tablet and the tablet are arranged on the back of the tablet so that
LCD display that displays in response to input from the tablet
Playing, sequentially scanning a light source for illuminating the liquid crystal display, and a pixel detection area of the tablet.
The pen down position on the tablet
Monitoring means for monitoring, an icon image for performing a predetermined setting, and the icon
Window image related to the screen image
First control means for controlling the display so as to cause the display to occur
And a setting change icon displayed on the liquid crystal display.
Operation on the tablet with the pen corresponding to the
Select the first window for controlling the light source correspondingly
And the pen corresponding to the first window
In response to the operation on the tablet by
And second control means for controlling a brightness setting means for setting the brightness of the light source, passed from when the pen on the tablet pen-down
Measuring means for measuring time; and time setting means for setting time in advance , wherein the second control means includes a first control means for controlling the light source.
Displaying an operation unit in the first window;
Operation of the pen to the tablet corresponding to the operation unit
Make settings in the program based on work, setting on the program, before the liquid crystal display
Display a second window for setting
Corresponding to the second operation unit displayed in the second window
By operating the tablet with the pen,
The time setting means includes an operation of setting the time , and the second control means further includes a measurement result of the measurement means.
Based on the time set by the time setting means,
If the pen did not pen down on the tablet
The brightness of the light source is set by the brightness setting means.
With decreasing brightness or we that is, the brightness of the light source
When the pen is lowered, the monitoring means causes the pen to move forward.
Note that it was detected that the pen was down on the tablet
The brightness of the light source set by the brightness setting means.
Wherein the controller controls the light source so as to light up in of that
And portable computer. 2. The light source is a backlight. That
The portable computer according to claim 1, wherein: 3. A backlight for supplying power to the backlight.
A battery mounting part for mounting the battery, Connect an AC adapter that supplies power to the backlight
AC adapter connection terminal Further comprising The second control means may include the battery mounting portion in the battery mounting portion.
When power is supplied with a battery mounted,
When the AC adapter is connected to the C adapter connection terminal,
Point of the backlight when the source is supplied
Lighting control can be set to be different It is characterized by
The portable computer according to claim 2, wherein 4. The method according to claim 1, wherein the second control means includes turning off the light.
Control the light source 2. The method of claim 1, wherein:
Portable computer. 5. The coordinate information is input by operating a pen.
Tablet and superimposed on the back of the tablet
Placed and display in response to input from the tablet
Performing liquid crystal display and illuminating the liquid crystal display
Light source and the pixel detection area of the tablet are sequentially scanned.
The pen moves down to the tablet
Monitoring means for constantly monitoring the position of the light source, and brightness of the light source
Brightness setting means for setting lighting, and controlling lighting of the light source.
Light source control of portable computer having control means
Your way, Icon image and icon for performing predetermined settings
Window image related to the screen image
A first control for controlling the display so that Your step
And Icon for setting change displayed on the liquid crystal display
Operation on the tablet with the pen corresponding to the
Correspondingly, selecting the first window and selecting the first window
Window to be displayed on the liquid crystal display.
A second control step of controlling the indication; The first operation unit for controlling the light source is connected to the first window.
A third control mode for controlling the display so as to be displayed in the dough
Tep, By operating the first operation unit, the tablet is moved forward.
Elapsed time and ratio measured since the pen was down
Set the time for comparison as a program setting
A first setting step; The time set in the processing of the first setting step,
When the pen is not pen-down on the tablet,
The brightness of the light source is set by the brightness setting means.
And the brightness of the light source
If lowered, the monitoring means causes the pen to
When it is detected that the pen is down on the bullet,
With the brightness of the light source set by the brightness setting means
Fourth control step of controlling the light source to light up
When A light source control method comprising: 6. The fourth control step includes turning off the light.
Control the light source as The method according to claim 5,
The light source control method described in the above. 7. The portable computer is an electronic organizer.
Device The light source control according to claim 5, wherein
Method. 8. The light source according to claim 1, wherein the light source is a backlight.
Battery to supply power to the backlight
Re-attachment part and an AC power supply for supplying power to the backlight.
And an AC adapter connection terminal for connecting the adapter.
A light source control method for the portable computer, The battery is mounted on the battery mounting section and the power is
When it is being supplied, and before the AC adapter connection terminal
When the AC adapter is connected and power is supplied
To make the control of the backlight different in
To set The second window is displayed on the liquid crystal display.
Fifth control step of controlling display so as to display on
When, Corresponding to the second operation unit displayed in the second window.
Corresponding to the operation of the pen on the tablet,
A second setting switch for setting the backlight lighting control;
With tep Further comprising The fourth control step is a step of the second setting step.
Control the backlight based on settings in the process
The light source control method according to claim 5, wherein: