JP2000250455A - Information processing device - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To reduce the brightness of the backlight of a color liquid crystal display unit and to reduce the power consumption of the display unit, when the brightness of the backlight is reduced, the contrast of the display content of the display unit decreases, There is a problem that display contents are difficult to see. SOLUTION: A power saving control unit 103 for changing the brightness of a backlight and a color palette of a color liquid crystal display unit,
It comprises a luminance setting section 106 for setting luminance, a palette setting section 107 for setting a color palette, and a color pallet data table (storage section 104) capable of performing appropriate contrast display for a plurality of backlight luminances. The power control unit 103 reduces the brightness of the backlight of the color liquid crystal display unit when the remaining battery power becomes equal to or less than a certain amount, and generates a table of color pallet data for displaying the display content with maximum contrast according to the brightness. The setting of the pallet setting unit 107 prevents a decrease in the contrast of display contents.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to power saving control in an information processing apparatus having a color liquid crystal display and a battery drive.

[0002]

2. Description of the Related Art Conventionally, as a power saving control processing method for a color liquid crystal display section in an information processing apparatus having a color liquid crystal display section and a battery drive section, a power saving control section monitors the remaining battery power at regular time intervals. On the other hand, when the remaining amount of the battery falls below a certain level, a method has been adopted in which the backlight brightness of the color liquid crystal display section is reduced in order to extend the battery life.

[0003]

However, in the above-mentioned method, there is a problem that when the brightness of the backlight is reduced, the contrast of the displayed content is reduced and the displayed content becomes difficult to see.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problem. In an information processing apparatus having a color liquid crystal display unit and a battery drive unit, even when the backlight brightness of the color liquid crystal display unit is reduced as power saving processing. It is an object of the present invention to provide a power saving processing system in which the contrast of display contents does not decrease.

[0005]

SUMMARY OF THE INVENTION In order to solve this problem, the present invention provides a power saving control unit which monitors the remaining battery power at regular time intervals, and when the remaining battery power falls below a certain level, a color liquid crystal display. In addition to reducing the luminance of the light, a screen color scheme corresponding to the set backlight luminance is obtained from a database of a color palette group, and is set in the color palette of the color liquid crystal display unit.

[0006] Thus, even when the brightness of the backlight is reduced, by setting a color pallet group so that the display content has a high contrast, it is possible to prevent a decrease in the contrast of the display content due to the reduction in the brightness of the backlight. Can be.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS According to the first aspect of the present invention, a control unit for instructing to change a color palette of the color liquid crystal display unit in accordance with a change in luminance of a backlight of the color liquid crystal display unit is provided. An information processing apparatus having the function of automatically changing a setting of a color palette when a backlight luminance is reduced, thereby preventing a decrease in visual contrast.

According to a second aspect of the present invention, there is provided an information processing apparatus including a color liquid crystal display unit and a battery driving unit, wherein the brightness of a backlight of the color liquid crystal display unit is changed according to a remaining amount of a battery, and the color is changed. An information processing device comprising a power saving control unit that instructs to change a color palette of the liquid crystal display unit, wherein when the backlight luminance is reduced as power saving processing of the color liquid crystal display unit, It has an effect of preventing a decrease in visual contrast.

According to a third aspect of the present invention, in the information processing apparatus according to the first or second aspect, the contrast of the display content of the color liquid crystal display unit at each luminance of the backlight of the color liquid crystal display unit is maximized. An information processing apparatus provided with a database of color pallet data groups using a color pallet table capable of performing high-contrast display at each set backlight luminance as a database.

[0010] The invention described in claim 4 is the first invention.
The fifth aspect of the present invention is an information processing method having the same effect as that of the second aspect.

Hereinafter, an embodiment of the present invention will be described with reference to FIG.
This will be described with reference to FIG.

(Embodiment 1) FIG. 1 is a configuration diagram of an information processing apparatus according to an embodiment of the present invention.

In FIG. 1, reference numeral 101 denotes a color liquid crystal display unit, which is composed of a color liquid crystal. Reference numeral 102 denotes a battery driving unit which is formed of a secondary battery such as Li lithium ion. 1
Reference numeral 03 denotes a power saving control unit that polls the remaining amount of the battery driving unit at regular time intervals and performs power saving processing and color pallet change according to the remaining battery amount, and is arranged in a main storage unit including a RAM or the like. Reference numeral 104 denotes a database unit of a color palette table set in the color liquid crystal display unit, which is arranged in a secondary storage area such as an HDD. 105 is 10
An operation unit (user interface unit) for setting the power saving control unit 3. Here, ON / OF of power saving
F. Specify the backlight luminance for the remaining battery power. Reference numeral 106 denotes a luminance setting unit of the color liquid crystal display unit 101;
Reference numeral 107 denotes a color pallet setting unit of the color liquid crystal display unit 101.

FIG. 2 is a data structure diagram of the color pallet database stored in the storage unit 104 of FIG. 1, and stores character color and background color parameter data corresponding to the luminance of the backlight. . The color palette table designates the character color and the background color of the character constituting the display content of the color liquid crystal display unit, and the color is R (red) / G (green) /
B (blue) is indicated from 0 to 255, respectively. The brightness of the backlight is displayed from 0 (non-display) to 255 (brightest).

FIG. 3 is a data structure diagram of a database of luminance data corresponding to the remaining battery level stored in the storage unit 104 of FIG. Data is stored. The remaining battery power is read from the battery drive unit in a percentage display from 0 to 100. Here, the remaining battery level is displayed in 10 levels.

FIG. 4 is a flowchart for setting the backlight luminance and the color pallet of the color liquid crystal display unit in accordance with the remaining amount of the battery performed by the power saving control unit 103 of FIG.

Hereinafter, the operation of the information processing apparatus according to the present invention will be described with reference to the flowchart of FIG.

(ST1) The remaining battery level is acquired at regular time intervals. The fixed time interval can be set from 30 seconds to 2 minutes. The default is one minute.

(ST2) It is determined whether the power saving state is to be updated according to the table shown in FIG.
If it is not necessary to update, the process returns to ST1 and waits until the next battery remaining amount is obtained. If it needs to be updated, the process proceeds to ST3.

(ST3) The storage unit 104 shown in FIG.
, And the backlight luminance corresponding to the remaining battery power is obtained from the table.

(ST4) The storage unit 104 shown in FIG.
And obtains a color pallet table corresponding to the backlight luminance.

(ST5) The backlight brightness is set.

(ST6) The color pallet table is set, and the process returns to ST1 for acquiring the remaining amount of the backlight.

FIG. 5 shows a display screen of a character and a character background color when the backlight luminance is the brightest (255) and a screen when the luminance is the darkest (127). By changing the color of the character background color from white to pale yellow, a difference in lightness plus a difference in chroma is added to increase visual contrast.

In the above description, an example was described in which the display section was constituted by a color liquid crystal monitor. However, the present invention can be similarly applied to other color monitors.

[0026]

Next, specific examples of the present invention will be described.

An embodiment in a notebook personal computer having a color liquid crystal and a battery drive unit will be described. The power saving control unit of the present invention is incorporated in a part of the OS as power saving software. The power saving control unit uses the interval timer of the OS to acquire the remaining battery power from the battery driving unit at one-minute intervals, and sets the backlight luminance and the color palette according to the remaining battery power. In the power saving software, the control of the backlight brightness directly controls the hardware of the color liquid crystal display unit, and the setting of the color pallet table is performed by the GUI (Graphical Us
The color palette of the color liquid crystal display unit is set by changing the color setting of the (er Interface).

As a result, it is possible to realize a power saving function by lowering the luminance of the backlight according to the remaining amount of the battery, and to realize a power saving system that prevents a reduction in contrast of display contents due to a change in color palette.

[0029]

As described above, according to the present invention, even when the backlight luminance of the color liquid crystal display section is reduced in accordance with the remaining battery power, the contrast of the displayed contents can be changed by changing the color palette of the screen configuration. Can be kept constant.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of an information processing apparatus according to an embodiment of the present invention;

FIG. 2 is a data structure diagram showing correspondence of display contents to a color palette table with respect to backlight luminance.

FIG. 3 is a data structure diagram showing a correspondence between a battery remaining amount and a backlight luminance amount.

FIG. 4 is a flowchart of a power saving control process.

FIG. 5 shows an example of display contents.

[Explanation of symbols]

Reference Signs List 101 color liquid crystal display unit 102 battery drive unit 103 power saving control unit 104 storage unit (database unit of color pallet table) 105 operation unit (user interface unit) 106 brightness setting unit 107 pallet setting unit

Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat II (Reference) G09G 5/06 G09G 5/06 5/10 5/10 B F-term (Reference) 2H093 NC28 NC29 NC42 NC49 NC50 NC58 NC65 ND05 ND09 NE06 5C006 AA02 AA03 AA11 AA22 AC02 AF46 AF51 AF52 AF69 BB11 BC16 BF45 EA01 FA00 FA47 FA56 5C080 AA10 BB05 CC03 DD01 DD24 EE29 EE30 FF03 FF09 GG02 GG09 JJ02 JJ07 5C082 AA01 BA02 BA12 BA34 BA01 BA01 BA01 BA02 BA01 BA01 BA02 BA12 BA34 BB12 BB15 CC12 EE25 EE30 GG22 LL07

Claims (5)

[Claims] 2. An information processing apparatus according to claim 1, further comprising a control unit for instructing to change a color pallet of said color liquid crystal display unit in accordance with a change in brightness of a backlight of said color liquid crystal display unit. 2. An information processing apparatus having a color liquid crystal display section and a battery drive section, wherein the luminance of the backlight of the color liquid crystal display section and the color pallet of the color liquid crystal display section are changed in accordance with the remaining amount of the battery. An information processing apparatus comprising a power saving control unit for instructing the information processing. 3. The information processing apparatus according to claim 1, further comprising a database of a color pallet data group that maximizes the contrast of the display content of the color liquid crystal display unit at each luminance of the backlight of the color liquid crystal display unit. apparatus. 4. The information processing method according to claim 1, further comprising the step of instructing to change the color pallet of the color liquid crystal display in accordance with the change of the luminance of the backlight of the color liquid crystal display. 5. An information processing apparatus having a color liquid crystal display section and a battery drive section, wherein the luminance of the backlight of the color liquid crystal display section and the color palette of the color liquid crystal display section are changed according to the remaining amount of the battery. An information processing method, comprising a step of instructing the information processing.