KR20030077192A - Power saving mode control method for display - Google Patents

Abstract

PURPOSE: A method for controlling a power-saving mode of a video display device is provided to forcibly enter or release a power-saving mode by controlling power or a power-saving mode according to a time inputting a power switch. CONSTITUTION: If a user inputs a power switch(102), a microprocessor(100) counts a power switch input time. If the user orders entering a power-saving mode by continually inputting the power switch input time, the microprocessor checks input states of horizontal and vertical synchronous signals. If the horizontal and vertical synchronous signals are inputted, the microprocessor controls a power-saving control unit(106) for forcibly converting a mode of a monitor into the first power-saving mode. If both horizontal and vertical synchronous signals are not inputted, the power-saving control unit converts the mode of the monitor into the second power-saving mode. If the user inputs the power switch, the microprocessor controls the power-saving control unit for converting the mode of the monitor into a normal mode.

Description

Power saving mode control method of video display equipment {POWER SAVING MODE CONTROL METHOD FOR DISPLAY}

The present invention relates to an image display device, and more particularly, to a power saving mode control method of an image display device.

An image display device such as a monitor has a power saving function for minimizing unnecessary power consumption by entering a power saving mode when the user does not use it for a long time.

In brief description of a general power saving function, if a user's operation is not detected during the power saving mode entry time set by the user, the personal computer blocks one of the horizontal and vertical synchronization signals provided to the monitor. The monitor enters a power saving mode if either of the horizontal and vertical synchronization signals is not provided from the personal computer.

However, it is very difficult to properly set the power saving mode entry time. That is, if the power saving mode entry time is set too long, unnecessary power consumption is caused. If the power saving mode entry time is set too short, the monitor enters the power saving mode while the user is away for a while and returns to the normal operation mode. Had to wait for the return time.

In order to solve such a conventional problem, the present applicant has filed a Utility Model Registration Application No. 20-1999-0000472 under the name "Power saving control circuit of a monitor by one-touch method".

The one-touch power saving control circuit of the monitor uses a one-touch power saving switch for forcibly operating or releasing the power saving circuit of the monitor, thereby enabling the user to enter or release the power saving mode at any time. do.

However, as described above, the addition of a power saving changeover switch to the monitor has caused the appearance of the monitor not to be simply and beautifully designed. Accordingly, in the related art, there has been a demand for a technology for enabling a monitor to enter or release a forced power saving mode without the addition of a switch.

Accordingly, an object of the present invention is to provide a method for controlling a power saving mode of an image display device, which can force a user to enter or release a power saving mode of the image display device without changing its appearance.

1 is a schematic configuration diagram of a monitor to which the present invention is applicable.

2 is a flowchart of a power saving mode control method according to a preferred embodiment of the present invention.

Explanation of symbols on the main parts of the drawings

100 microprocessor

102: power switch

104: horizontal / vertical sync signal detector

106: power saving control unit

108: power control unit

110: power supply

The present invention for achieving the above object is a first step of counting the input duration when the power switch is input, and a second step of switching to the power saving mode if the input duration is more than (or less) a predetermined time And a third step of switching to the power-off mode if the input duration is less than or equal to a predetermined time.

Referring to FIG. 1 which shows a schematic configuration diagram of a monitor which is an image display apparatus to which the present invention can be applied, not only the overall control of the monitor but also the control of the power saving mode according to a preferred embodiment of the present invention. The microprocessor 100, the power switch 102 for the interface between the user and the microprocessor 100, the horizontal / vertical synchronization signal detection unit 104 for detecting the presence or absence of the horizontal or vertical synchronization signal provided from the personal computer A power saving control unit 106 performing an entry into a power saving mode under the control of the microprocessor 100, a power control unit 108 performing an entry into a power off mode under the control of the microprocessor 100, In accordance with the control of the power control unit 108 is composed of a power supply unit 110 for supplying driving power to the monitor.

A power saving mode control method according to a preferred embodiment of the present invention will be described with reference to the flowchart shown in FIG.

While controlling the monitor in the normal operation mode, the microprocessor 100 checks whether the user inputs the power switch 102 (step 200). When the input of the power switch 102 is checked, the microprocessor 100 starts to count the power switch input time (step 202). The count of the power switch input time continues until the user's power switch input is stopped.

When the input of the power switch 102 of the user is stopped (step 204), the microprocessor 100 searches whether the power switch input time is a predetermined time, for example, 0.5 [sec] or more. If the input time of the power switch is less than or equal to a predetermined time, the microprocessor 100 determines that the user commands the entry into the power off mode. When the power switch input time is longer than a predetermined time, the microprocessor 100 determines that the user commands to enter the power saving mode.

The microprocessor 100 checks the input state of the horizontal and vertical synchronization signals when the user commands to enter the power saving mode by continuously inputting the power switch 102 for more than the predetermined time (step 206). Step 212). The microprocessor 100 may check whether the current monitor is in the power saving mode under the control of the personal computer through the input state of the horizontal and vertical synchronization signals.

When the horizontal and vertical synchronization signals are input, the microprocessor 100 determines that the power saving mode control is not performed through the personal computer and controls the power saving control unit 106 to forcibly switch the monitor to the first power saving mode (step 214). ).

In this way, after forcibly switching to the first power saving mode, the microprocessor 100 checks whether the user inputs the power switch 102 again (step 216). In this case, when the user inputs the power switch 102 again, the microprocessor 100 controls the power saving control unit 106 to change the monitor mode to the normal mode (step 218).

If the horizontal and vertical synchronous signals are not input in a state in which the user inputs the power switch 102 for a predetermined time or more, the microprocessor 100 determines whether either the horizontal synchronous signal or the vertical synchronous signal is input. Search for. At this time, if one of the two synchronization signals is input (step 220, 224), the microprocessor 100 controls the power saving control unit 106 to switch the monitor to the first power saving mode (step 222). If the two synchronization signals are not input in the mode, the microprocessor 100 switches the monitor to the second power saving mode. The second power saving mode is designed to reduce power consumption more than the first power saving mode.

During the first sleep mode and the second sleep mode, the microprocessor 100 checks whether the user inputs the power switch 102 again (step 228). In this case, when the user inputs the power switch 102 again, the microprocessor 100 controls the power saving control unit 106 to change the monitor mode to the normal mode (step 218). Here, switching the first or second power saving mode according to the input state of the horizontal synchronization signal is the same as the power saving mode control method according to general host control.

If the user continuously inputs the power switch for less than a predetermined time, the microprocessor 100 controls the power control unit 108 to drive the monitor mode to the power off mode (step 208). During the power off mode, the microprocessor 100 checks whether the user inputs the power switch 102 again (step 210). In this case, when the user inputs the power switch 102 again, the microprocessor 100 controls the power control unit 108 to change the mode of the monitor to the normal mode (step 218).

As described above, according to the present invention, the power control or the power saving mode entry control is performed according to the time for inputting the power switch, thereby making it possible to forcibly enter or exit the power saving mode of the image display device without changing the appearance. have.

Claims (5)

In the power saving mode control method of a video display device having a power switch, A first step of counting the input duration when the power switch is input; A second step of switching to a power saving mode if the input duration is greater than or equal to a predetermined time; And a third step of switching to a power-off mode if the input duration is less than or equal to a predetermined time. The method of claim 1, wherein the second step, Checking whether the input duration is more than (or less) a predetermined time; Checking whether both a horizontal and a vertical synchronization signal are input from a host when the input duration is more than (or less) a predetermined time; And switching to a first power saving mode when both a horizontal and a vertical synchronization signal are input from the host. The method of claim 2, And switching to a first power saving mode when only one of a horizontal and a vertical synchronization signal is input from the host. The method of claim 2, And switching to a second power saving mode if both horizontal and vertical synchronization signals are not input from the host. The method of claim 3, And the second power saving mode is a mode designed to further reduce power consumption compared to the first power saving mode.