JP2003032571A - Video display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the power consumption of a large screen television receiver or the like at its start. SOLUTION: At application of power by an operation of power on by a power on/off key, a control section 10 activates a power supply section 7 and a timer section 8 and sets a gain of an AGC(automatic gain control) section 2a of a video processing means 2 and of contrast of a contrast section 2b on the basis of start state gain setting data and a start state contrast setting data stored in advance in a memory section 9 for a time when the timer section 8 counts time and darkens a display video image of a display section 3. After a time when the timer section 8 expires, the control section 10 restores the settings of the gain of the AGC section 2a and the contrast of the contrast section 2b to the original settings.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image display device, and more particularly, to suppression of power consumption when the image display device is activated.

[0002]

2. Description of the Related Art In recent years, television receivers, display monitors and the like have generally tended to have larger screens. In particular,
PDP (plasma display panel) capable of large screen
The emergence of is spurring this large screen. Such a large screen has the advantage of increasing the power from the viewpoint of viewing, but has the drawback of increasing the power consumption. In addition, it is undeniable that the functions of the display device have expanded due to technological improvements and diversification of video sources in recent years, and that this expanded function has further increased power consumption. Therefore, when the contracted power is small in a general household or the like, the breaker may drop due to the use of the large-screen television receiver or the like. To avoid this, it is required to reduce power consumption, but in the past, reduction of power consumption during operation has been the main one. For example, the brightness or the contrast is adjusted according to the brightness of the room so that the brightness is not unnecessarily bright.

[0003]

However, generally, in an electric device, a large current flows momentarily at the time of startup (when the power is turned on), and the startup current tends to increase as the power consumption of the device increases. Therefore, the breaker may drop when the television receiver or the like is turned on. Therefore, in addition to the reduction of power consumption during the above-described operation, it is desired to suppress the power consumption when the power is turned on. The present invention has been made from such a viewpoint, and an object of the present invention is to provide an image display device capable of suppressing power consumption when the power is turned on.

[0004]

In order to achieve the above object, the present invention is a video display device comprising a video processing means for processing an input video signal and outputting it to a display section, which is preset from the time of power-on. Provided is a video display device provided with video level control means for controlling the video processing means so as to reduce the luminance level of the video signal output by the video processing means to a predetermined level while time passes. is there.

Further, the video level control means is set with a timer section for counting a set time after the power is turned on, start-up gain setting data set during the time counted by the timer section, and after the lapse of the time. A memory unit in which normal-time gain setting data and normal-time contrast setting data are stored in advance, a control unit that controls the timer unit, the memory unit, a power supply unit that supplies power to each circuit, and the video processing unit. And an operation unit having a power on / off key for turning the power on or off, and when the power on operation is performed by the operation unit, the control unit activates the power supply unit while the video processing is performed. Means AGC (Auto
The gain of the (matic gain control) unit is set only during the time measured by the timer unit according to the start-time gain setting data of the memory unit.

Alternatively, the video level control means is set by a timer section for counting a preset time after the power is turned on, startup contrast setting data set during the time counted by the timer section, and after the lapse of the time. A control unit that controls the memory unit in which the normal gain setting data and the normal contrast setting data are stored in advance, the timer unit, the memory unit, the power supply unit that supplies power to each circuit, and the video processing unit. And an operation unit having a power on / off key for turning the power on or off. When the power on operation is performed by the operation unit, the control unit activates the power unit while the image During the time when the timer unit measures the contrast setting of the contrast unit of the processing unit according to the startup contrast setting data of the memory unit. It may be set only.

Alternatively, the video level control means includes a timer section for counting a set time from the time of power-on, start-up gain setting data and start-up contrast setting data set during the time counted by the timer section, A memory unit in which normal-time gain setting data and normal-time contrast setting data set after the lapse of time are stored in advance; a timer unit, a memory unit, a power supply unit that supplies power to each circuit, and the video processing unit. A control unit for controlling the power supply and an operation unit having a power on / off key for turning the power on or off, and when the power on operation is performed by the operation unit, the control unit operates the power supply unit. On the other hand, the gain of the AGC unit and the contrast setting of the contrast unit of the image processing unit are set to the gain setting data at start-up of the memory unit and the setting. By the time the contrast setting data may be the timer unit is set only during the time for clocking.

Further, the setting made by the control unit only during the time measured by the timer unit is gradually returned to the setting of the normal operation.

Further, a setting ON / OFF key may be provided in the operation section to turn on or off the setting operation of the video processing means by the video level control means.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings based on examples. FIG. 1 is a block diagram of essential parts showing an embodiment of a video display device according to the present invention. In the figure, V1 to V4 are input video signals having four systems as an example. 1 is a signal switching unit, which is an input video signal
Select one of V1 to V4 by switching. Reference numeral 2 is an image processing means, which is an AGC section 2a for controlling the gain to stabilize the output, a contrast section 2b for setting the contrast, and these AGC sections.
And a video processing unit 2c that performs processing suitable for display other than the processing of the unit 2a and the contrast unit 2b. Reference numeral 3 denotes a display unit, which outputs R (red) and G (green) from the video processing means 2.
And B (blue) signals are displayed. Reference numeral 4 denotes an operation unit, which is a power-on / off key 4a for turning on / off the power and for activating (on) or deactivating (off) the function of the present invention.
A setting on / off key 4b and an input switching key 4c for setting the signal selection of the signal switching unit 1 are provided.

Reference numeral 5 denotes a light receiving section, which receives an infrared operating signal from the remote controller 6. Although not shown, the remote controller 6 is provided with a power on / off key, a setting on / off key, and an input switching key of the operation unit 4. A power supply unit 7 supplies power to each circuit. Reference numeral 8 denotes a timer unit, which measures a preset time from when the power is turned on by the power on / off key 4a. Reference numeral 9 denotes a memory unit, which is a gain setting data at startup and a contrast setting data at startup for setting the AGC unit 2a and the contrast unit 2b during the time measured by the timer unit 8, and is set after the time measured by the timer unit 8 has elapsed. The normal-time gain setting data and the normal-time contrast setting data are stored in advance. A control unit 10 controls the switching unit 1, the video processing unit 2, the power supply unit 7, the timer unit 8 and the memory unit 9 according to the operation of the operation unit 4 or the remote controller 6. The operation unit 4, the timer unit 8,
A device including the memory unit 9 and the control unit 10 serves as a video level control means.

Next, the operation of the present invention will be described. In a normal state after the power is turned on, one of the input video signals V1 to V4 set by the input switching key 4c is input from the signal switching unit 1 to the video processing unit 2 and the AGC unit 2 of the video processing unit 2 is input.
Predetermined processing is performed in a, the contrast section 2b, and the image processing section 2c, and the result is displayed on the display section 3. In the normal time, the control unit 10 sets the AGC unit 2a and the contrast unit 2b based on the normal time gain setting data and the normal time contrast setting data of the memory unit 9. When the power is turned off again by the power on / off key 4a or the remote controller 6 in the above state and then the power is turned on again, the control unit 10 controls each unit as follows. The control unit 10 is a power on / off key 4a or a light receiving unit 5.
Power on by the remote controller 6 is detected via the
To supply power to each circuit, while the timer unit 8
To activate the time measurement, and read the setting data at startup from the memory unit 9. Here, the start-up setting data stored in the memory unit 9 is the start-up gain setting data for the AGC unit 2a and the start-up contrast setting data for the contrast unit 2b, and the start-up gain setting data is the gain of the AGC unit 2a. Is lowered to a predetermined ratio (eg 50%) with respect to the normal gain setting data, and the startup contrast setting data sets the contrast level of the contrast section 2b to a predetermined ratio (eg 50%) with respect to the normal contrast setting data. The data to lower.

Since the image quality is deteriorated in the normal display by the setting by the start-up setting data, the setting is canceled only after a lapse of a certain time after the power is turned on, and the original gain setting data which is the original setting. And it is necessary to return to the contrast setting data in the normal time. This fixed time is determined in advance and the timer unit 8 measures the time. The timer unit 8 sends a signal indicating the end of time counting when the fixed time is counted.
Output to. That is, the control unit 10 sets the AGC unit 2a and the contrast unit 2b with the data at the time of starting read from the memory unit 9 when the power is turned on, and when the timer unit 8 outputs the signal indicating the end of the time counting, Cancel the setting and return to the original setting. In addition, this returning method may also be performed stepwise within the fixed time so as not to make the screen uncomfortable. In this case, the timer section 8 outputs the timing for starting the stepwise return operation, and the control section 10 returns to the original setting from this timing. The memory unit 9 stores the data of each stepwise setting.
It should be stored in advance in.

As described above, the display on the display unit 3 is darker than the normal time during the above-mentioned fixed time, and the power consumption is reduced. In the above, the setting at the time of power-on (at the time of activation) is set to both the AGC section 2a and the contrast section 2b, but either the AGC section 2a or the contrast section 2b may be set. In this case, the startup setting data stored in the memory unit 9 may be either one of the data. The setting ON / OFF key 4b sets whether to activate (ON) or deactivate (OFF) the setting of the AGC unit 2a etc. when the power is turned on. When it is set to active (on), it becomes the above-mentioned operation, and when it is set to inactive (off), it is immediately set by the gain setting data and contrast setting data at normal time without setting at startup. . This makes it possible to deal with the case where the deterioration of the image quality at the time of starting is not desired.

[0015]

As described above, according to the present invention, the image level is lowered so that the image display is darker than the normal display for a certain period when the power is turned on, so that the power consumption when the power is turned on is reduced. It is possible to prevent the breaker from dropping when the power is turned on. Further, in the present invention, only the data storage of the memory unit 9 needs to be corrected, it is not necessary to add a new circuit, and the cost does not increase.

[Brief description of drawings]

FIG. 1 is a block diagram of a main part of an embodiment of a video display device according to the present invention.

[Explanation of symbols]

1 Signal switching section 2 Video processing means 2a AGC section 2b contrast section 2c Video processing unit 3 Display 4 operation part 4a Power on / off key 4b Setting ON / OFF key 4c Input selector key 5 Light receiving part 6 remote control 7 power supply 8 timer section 9 memory 10 Control unit

Claims (6)

[Claims] 1. A video display device comprising a video processing means for processing an input video signal and outputting it to a display unit, said video processing means outputs the video signal during a preset time from when the power is turned on. An image display device comprising image level control means for controlling the image processing means so as to reduce the luminance level of an image signal to a predetermined level. 2. The video level control means is set with a timer section for counting a set time from the time of power-on, start-up gain setting data set during the time counted by the timer section, and after the lapse of the time. A memory unit in which normal-time gain setting data and normal-time contrast setting data are stored in advance, a control unit that controls the timer unit, the memory unit, a power supply unit that supplies power to each circuit, and the video processing unit. And an operation unit having a power on / off key for turning the power on or off, and when the power on operation is performed by the operation unit, the control unit activates the power supply unit while the video processing is performed. Means AGC (Automati
2. The video display device according to claim 1, wherein the gain of the c Gain Control) unit is set only during the time counted by the timer unit by the start-up gain setting data of the memory unit. 3. The video level control means is set by a timer section for counting a preset time after power-on, startup contrast setting data set during the time counted by the timer section, and after the lapse of the time. A control unit that controls the memory unit in which the normal gain setting data and the normal contrast setting data are stored in advance, the timer unit, the memory unit, the power supply unit that supplies power to each circuit, and the video processing unit. And an operation unit having a power on / off key for turning the power on or off. When the power on operation is performed by the operation unit, the control unit activates the power unit while the image The contrast setting of the contrast section of the processing means is set only during the time counted by the timer section according to the start-time contrast setting data of the memory section. The video display device according to claim 1, wherein 4. A timer unit for counting the set time from the time when the power is turned on, a startup gain setting data and a startup contrast setting data which are set during the time counted by the timer unit, A memory unit in which normal-time gain setting data and normal-time contrast setting data set after the lapse of time are stored in advance; a timer unit, a memory unit, a power supply unit that supplies power to each circuit, and the video processing unit. A control unit for controlling the power supply and an operation unit having a power on / off key for turning the power on or off, and when the power on operation is performed by the operation unit, the control unit operates the power supply unit. On the other hand, the gain setting data of the AGC unit and the contrast setting of the contrast unit of the video processing unit are set to the gain setting data at startup and the startup control of the memory unit. The video display device according to claim 1, wherein the video display device is set only during a time period measured by the timer unit based on the trust setting data. 5. The setting according to any one of claims 2 to 4, wherein the setting by the control unit only during the time measured by the timer unit is gradually returned to the setting of the normal operation. The image display device described. 6. A setting on / off key is provided on the operation section,
5. The video display device according to claim 2, wherein the operation of setting the video processing means by the video level control means is turned on or off.