Method for adjusting brightness level of display
First Claim
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1. A method for adjusting a brightness level of a display used in a portable computer system, the method comprising:
- separately providing brightness control information for a plurality of brightness levels for each of at least two power mode types;
confirming a type of power mode currently being used out of said at least two power mode types; and
controlling the brightness level of the display by using corresponding brightness control information on the confirmed power mode.
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Abstract
Methods and apparatus for adjusting the brightness level of a display (LCD) can separately store index information corresponding to each brightness level of the LCD according to which of a plurality of types of power are being used. Further, when the type of power of the system is changed, the index information corresponding to the power being used (e.g., changed power) is preferably read in order to adjust the brightness level of the LCD. Therefore, it is possible to maintain a preadjusted brightness level of the LCD by a user in a corresponding power mode.
12 Citations
21 Claims
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1. A method for adjusting a brightness level of a display used in a portable computer system, the method comprising:
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separately providing brightness control information for a plurality of brightness levels for each of at least two power mode types;
confirming a type of power mode currently being used out of said at least two power mode types; and
controlling the brightness level of the display by using corresponding brightness control information on the confirmed power mode. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method, comprising:
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determining a type of power supply currently being used among a plurality of power supplies in a computer system when a brightness level of a display is adjusted;
selecting a brightness level information corresponding to the determined power supply type among brightness level information of the adjusted brightness level of the display for each of the plurality of power supplies and reading an index information corresponding to the selected brightness level information; and
driving the adjusted brightness level of the display based on the readout index information, and independently storing the index information according to the type of power supply. - View Dependent Claims (11, 12, 13, 14, 15)
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16. A method for adjusting a brightness level of a display, the method comprising:
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independently storing index information corresponding a brightness level of the display in at least two different power modes; and
adjusting a brightness of the display using information on a current power mode being used and the stored index information for the brightness level of the current power mode when the power mode is changed. - View Dependent Claims (17, 18, 19)
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20. An apparatus that controls an inverter pulse width modulation (PWM) frequency of a liquid crystal display (LCD) in a portable computer, comprising:
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a storage device configured to separately provide LCD brightness level information for a plurality of brightness levels for each of at least two power mode types;
an inverter configured to supply a voltage to the LCD; and
control means for controlling a PWM frequency of the inverter in accordance with a designated brightness level, a current power supply mode and the corresponding LCD brightness level information for the current power supply mode. - View Dependent Claims (21)
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Specification