KR20130043402A - Power-saving method using lighting control of touch area and power-saving type display device - Google Patents

Abstract

PURPOSE: A power saving method and a power saving type display device are provided to minimize power consumption by controlling the brightness of backlight. CONSTITUTION: A display unit comprises a plurality of pixels. The display unit displays an image according to a control signal provided to each pixel. A touch sensor(20) is arranged in each pixel or each schedule area. The touch sensor detects a touch point of a user. Backlight(30) is arranged in each pixel or each schedule area of the display unit. A backlight operating unit(40) controls the brightness by controlling operating power applied to the backlight. A control unit(50) transmits a control signal in order to control the brightness of the backlight to the backlight operating unit according to the touch point detection of the touch sensor. [Reference numerals] (20) Touch sensor; (40) Backlight operating unit; (50) Control unit;

Description

Power-Saving Method Using Lighting Control of Touch Area and Power-Saving Type Display Device

The present invention relates to a power-saving method and a power-saving display device by adjusting the touch area lighting, and more particularly, by minimizing power consumption by adjusting a backlight brightness of a corresponding area by sensing a touched area in the touch panel. The present invention relates to a power-saving method and a power-saving display device by adjusting the touch area lighting.

Recently, portable terminals are equipped with a function of utilizing various information such as games, near field communication, image capturing, internet, education, etc. as well as wireless communication. In order to implement such various functions, since power consumption is greatly increased, the capacity of the battery is required to be increased, but the development of a technology for increasing the capacity of a battery mounted in a limited space is still limited.

Therefore, in recent years, various efforts have been made to extend battery life by reducing power consumption. For example, many techniques for controlling backlight illumination, which have a large influence on power consumption, have been proposed in display devices.

Republic of Korea Patent Publication No. 10-2010-0092750 discloses a technique for adjusting the LCD brightness according to the ambient brightness, and Patent Publication No. 10-2007-0012142 discloses that the background light on / off according to the opening / closing of the folder. The technology to reduce the processing load of the software by processing in hardware and to increase the response speed of the background light is disclosed, and Patent Publication No. 10-2006-0114274 discloses the direction in which the user looks at the terminal using a geomagnetic sensor and an acceleration sensor. Technology to reduce the current consumption of the battery by detecting the brightness of the backlight only in the direction is disclosed, and Patent No. 10-2006-0054505 is equipped with a temperature sensor to detect the body temperature to quickly and easily illuminate the external LCD window lighting There is a technology that can be turned on to reduce battery consumption.

In the case of the prior art described above, a separate sensor must be installed in order to adjust the lighting, thereby increasing the manufacturing cost of the terminal.

On the other hand, Korean Patent No. 10-0698667 repeats the process of detecting the battery status information by accessing the hardware and the process of predicting the battery status information by software to shorten the hardware connection and monitoring time for battery information detection A technology for reducing battery consumption is disclosed, and Patent Publication No. 10-2011-0070046 discloses a plurality of areas having a predetermined size and brightness for each area on a display screen according to positions of arbitrary program windows and pointers. Differential control is provided to provide a user convenience and at the same time improve the power saving efficiency is disclosed.

In the prior art described above, there is a fatal disadvantage that the amount of information is reduced by reducing the size of the screen.

The present invention has been made in view of the above, it is to minimize the power consumption by adjusting the backlight brightness of the corresponding area by detecting the touched area in the touch panel without the loss of information and the addition of additional sensors. It is an object of the present invention to provide a power-saving method through adjusting the touch area lighting.

Another object of the present invention is to provide a power-saving display device capable of minimizing power consumption without loss of information from a user by adjusting illumination brightness of a touch panel occlusion area by a user's touch. .

According to an embodiment of the present invention, a power saving method using lighting control of a touch area detects a touch point in a touch sensor, sets an area to adjust brightness of a backlight in the controller based on a portion detected by the touch sensor, and corresponding area. And transmitting a control signal to a backlight driver to adjust the backlight brightness of the backlight driver, and controlling the backlight brightness by controlling a driving voltage.

According to an embodiment of the present invention, a power-saving display device includes a display unit configured to display a plurality of pixels and display an image according to a control signal given to each pixel, and are disposed and disposed for each pixel or a predetermined area of the display unit and touched by a user. A touch sensor for detecting a point, a backlight disposed for each pixel or a predetermined region of the display unit, the backlight of which brightness is adjusted according to a control signal, and a backlight driver of controlling the brightness by adjusting a driving voltage applied to the backlight; And a controller configured to transmit a control signal to adjust the backlight brightness to the backlight driver based on whether the touch point is detected by the touch sensor.

The controller generates and transmits a control signal to adjust the backlight brightness of the area corresponding to the touch point detected by the touch sensor to be darker than other areas.

According to an embodiment of the present invention, a power saving method and a power saving display device using light control of a touch area may minimize power consumption by detecting a touched area of a touch panel and adjusting a backlight brightness of a corresponding area. Do.

In addition, according to an embodiment of the present invention, a power saving method and a power saving display device using light control of a touch area may utilize an input value of a touch sensor for recognizing an existing touch point without using an additional sensor, and thus, without consuming additional battery. It is possible to perform a power saving function.

In addition, according to an embodiment of the present invention, a power saving method and a power saving display device by adjusting the lighting of a touch area, the screen is darkened only for an area that is covered by touching the screen without darkening the entire screen or using only a partial area. There is no loss of input and output data.

Furthermore, according to the power saving method and the power saving display device by adjusting the touch area lighting according to the embodiment of the present invention, since the multi-touch gesture is recently popularized, it is possible to maximize the power saving effect due to the increase of the touch area.

Further, according to the power saving method and the power saving display device by adjusting the touch area lighting according to the embodiment of the present invention, it is also possible to use the feedback of the touch recognition to the user through the change of the brightness of the touch area. For example, it is possible for the user to intuitively check whether the device is recognized as an actual touch or if the device is touched due to a technical problem.

1 is a block diagram conceptually illustrating a power saving display device according to a first embodiment of the present invention.
2 is an exploded perspective view conceptually illustrating a configuration of a display unit and a backlight in the power saving display device according to the first embodiment of the present invention.
3 is a block diagram conceptually illustrating a power saving display device according to a second embodiment of the present invention.
FIG. 4 is a block diagram conceptually illustrating a power saving method through adjusting touch area lighting according to a third embodiment of the present invention.
5 is a power saving method by adjusting the touch area lighting according to the third embodiment of the present invention.
FIG. 6 is a view illustrating an occlusion state of only a touched area in a state of touching a display unit with a right hand in a power saving method by adjusting touch area lighting according to a third embodiment of the present invention.
FIG. 7 is a view illustrating an occlusion state of a touched region and a region to which a vertical tilt value is applied while the display unit is touched with a right hand in the method of controlling power saving by adjusting the touch region lighting according to the third embodiment of the present invention.
FIG. 8 is a view illustrating an occlusion state of a touched region and a region to which a vertical tilt value is applied while the display unit is touched with the left hand in the method of controlling power saving by adjusting the touch region lighting according to the third embodiment of the present invention.
FIG. 9 is a view illustrating an occlusion state of a touched region and a region to which a horizontal tilt value is applied while a display unit is touched with a right hand in a method of saving power by adjusting touch area lighting according to a third embodiment of the present invention.

Next, a preferred embodiment of a power saving method and a power saving display device by adjusting the touch area lighting according to the present invention will be described in detail with reference to the accompanying drawings.

The present invention can be embodied in various forms and is not limited to the embodiments described below.

In the following description, parts not closely related to the present invention are omitted in order to clearly describe the present invention. Like reference numerals designate like elements throughout the specification, and repeated descriptions thereof will be omitted.

First, as shown in FIGS. 1 and 2, a power saving display device according to an exemplary embodiment of the present invention includes a display unit 10, a touch sensor 20, a backlight 30, a backlight driver 40, and a controller. It consists of 50.

The display unit 10 includes a plurality of pixels, and displays an image or the like according to a control signal given to each pixel.

The display unit 10 is implemented by applying various configurations such as a liquid crystal display (LCD), a light emitting diode (LED), an organic light emitting diode (OLED), a plasma display panel (PDP), and the like, which are widely used in a mobile communication terminal or a portable terminal. It is possible to do so, detailed description thereof will be omitted.

The touch sensor 20 is disposed and disposed for each pixel or a predetermined area of the display unit 10.

The touch sensor 20 performs a function of detecting a user's touch point.

The touch sensor 20 may be provided integrally with the display unit 10 and may be implemented by applying various configurations, which are generally referred to as touch panels or touch screens, and thus, detailed descriptions thereof will be omitted.

For example, the touch sensor 20 may be configured to detect whether or not the touch is made by using an impedance value that changes according to whether or not the user touches, and whether or not it is touched by using a pressure value that changes according to whether or not the user is touched. It is also possible to configure to detect, in addition to the configuration can be configured by applying a variety of methods known in the art.

The backlight 30 is disposed and disposed for each pixel or a predetermined area of the display unit 10.

The backlight 30 is configured to adjust the brightness according to the control signal of the backlight driver 40.

For example, the light emitting device 32 of the backlight 30 may be configured using a light emitting diode (LED) or the like.

For example, the backlight 30 may be provided such that the light emitting devices 32 are disposed in one-to-one correspondence for each pixel of the display unit 10, and the entire display area of the display unit 10 is divided vertically and horizontally. In this case, the respective light emitting devices 32 may be provided to correspond to each area.

The backlight driver 40 is configured to adjust the brightness by adjusting the driving voltage applied to the backlight 30.

The controller 50 transmits a control signal to the backlight driver 40 to adjust the brightness of the backlight 30 according to whether the touch sensor 20 detects the touch point.

For example, the controller 50 generates and transmits a control signal to adjust the brightness of the backlight 30 of the area corresponding to the touch point detected by the touch sensor 20 to be darker than other areas.

In addition, as shown in FIG. 3, the power saving display device according to the second embodiment of the present invention further includes an inclination sensor 22 that detects an inclination of the display unit 10, and the inclination sensor is controlled by the control unit 50. By using the inclination value input from (22) is configured to transmit a control signal for adjusting the brightness of the backlight 30 to the area corresponding to the inclination value to the backlight driver 40.

Since the inclination sensor 22 can be implemented by applying various configurations widely used in a mobile communication terminal or a portable terminal, detailed description thereof will be omitted.

The inclination sensor 22 is configured to detect the vertical tilt or the left and right tilt, the up, down, left and right tilt of the display unit 10.

Next, an operation method of the power saving display device according to the first and second embodiments of the present invention configured as described above will be described.

As shown in FIG. 4, the power saving method using the touch area lighting control according to the third embodiment of the present invention comprises the steps of detecting a touch point (S10), setting an area to adjust brightness (S20), And transmitting the control signal (S30) and adjusting the brightness (S40).

In the detecting of the touch point (S10), when the user comes into contact with a specific point of the display unit 10, the touch sensor 20 detects whether the touch is performed.

For example, as shown in FIG. 5, when a user touches a specific portion of the display unit 10 using a thumb, the touch sensor 20 detects it, and the detected value is detected by the controller 50. ) Is entered.

In FIG. 5, the left side shows a state of touching the display unit 10 using the right hand thumb, and the right side shows a state of touching the display unit 10 using the left hand thumb.

In FIG. 5, the portion indicated by a red circle indicates an area where direct touch is performed, and the portion indicated by a blue circle indicates an area where the display unit 10 is covered together when touched.

For example, when a user touches a specific part of the display unit 10 using a thumb, not only the touched part but also the area of the display unit 10 of the entire area where the thumb to be touched is concealed from the user's eyes. It becomes an invisible occlusion area.

When the tilt sensor 22 is installed together with the touch sensor 20, the tilt value is also detected.

Using the inclination value detected by the inclination sensor 22, it is possible to determine whether the user makes a touch with the left hand or with the right hand.

In addition, by using the inclination value detected from the inclination sensor 22 to determine whether the user uses the display unit 10 in the vertical direction (see FIG. 5) or the display unit 10 in the horizontal direction (see FIG. 6). It is also possible.

The detected touch or tilt value detected as described above is input to the controller 50.

In the step of setting the area to adjust the brightness (S20), an area to adjust the brightness of the backlight 30 is set based on the portion detected by the touch sensor 20 in the controller 50.

For example, it is possible to set an area indicated by a red circle in FIGS. 5 and 6 as an area to adjust brightness of the backlight 30 based on the portion detected by the touch sensor 20.

Further, as shown in FIGS. 7 to 9, an area obtained by adding up the horizontal or vertical tilt value to the area detected by the touch sensor 20 using the tilt value detected from the tilt sensor 22 (FIG. It is possible to set the inner region divided by a light blue line in the region to adjust the brightness of the backlight (30).

FIG. 7 illustrates a state in which an area for adjusting brightness (internal region divided by a light blue line) is set by applying a vertical tilt value when touched with the left hand, and FIG. 8 by applying a vertical tilt value when touched with the right hand. FIG. 9 shows a state in which a brightness control area (inner area divided by a light blue line) is set, and in FIG. 9, an area in which brightness is adjusted (internal area partitioned by a light blue line) is set by applying a horizontal tilt value when the right hand is touched. Indicates a state.

By utilizing the detection result of the inclination sensor 22 as described above, it is possible to adjust the brightness of the occlusion area of a wider area according to the user's use form, it is possible to maximize the power saving effect.

The controller 50 may select and input an area extension value for setting a size of an area for adjusting brightness.

For example, because the physical conditions are different, such as when the user is a woman, when a man is an adult, and when a child, the area expansion value suitable for the user (for example, 1, 2, 3, etc.) If inputting, the controller 50 may be configured to set the area to adjust the brightness to a circular or oval of a predetermined radius from the center of the touch area detected by the touch sensor 20.

When the area extension value is set to 1, the area extension value is set in a circle having a radius of 5 mm, and in the case of 2, the area extension value is set in a table and inputted to the controller by a predetermined rule. It is also possible to configure the region expansion values to be changed as needed according to their usage style.

Similarly, the area extension value may be configured to be applied to the detection result of the inclination sensor 22.

According to the above configuration, the user can freely set the size of the area whose brightness is adjusted by selecting and inputting an area extension value, thereby effectively responding to the user's request.

In the transmitting of the control signal (S30), the controller 50 adjusts the brightness of the light emitting device 32 of the backlight 30 in the corresponding area (the area set as the brightness control area) from the controller 50 to the backlight driver 40. Send a control signal to

In the adjusting of the brightness (S40), the backlight driver 40 adjusts a driving voltage applied to each light emitting device 32 of the backlight 30 according to a control signal of the controller 50. The brightness of the light emitting device 32 of the backlight 30 is adjusted.

The control signal for adjusting the brightness transmitted from the controller 50 to the backlight driver 40 is configured to dim or turn off the brightness of the light emitting device 32 of the backlight 30 in a corresponding region. It is possible.

As described above, when the brightness of the backlight 30 or the light emitting device 32 of the corresponding area is darkened or turned off, the display part 10 of the corresponding area is concealed and occluded by the user's finger. The amount of information that the user can perceive from 10) is not reduced at all.

Furthermore, the user can easily and intuitively check whether the device (a mobile communication terminal or a portable terminal, etc.) recognizes whether the device is touched or not because of a technical problem by checking the display unit 10 of the touched area. .

The power saving method and the power saving display device by adjusting the touch area lighting according to the embodiment of the present invention constituted as described above are not only a mobile communication terminal and a portable terminal but also a cash dispenser, an unmanned civil dispenser, and various traffic guide systems or buildings installed on the road. It is possible to apply to a device to which a variety of touch panel or touch screen, such as a guide system installed in.

In the above description of a preferred embodiment of a power saving method and a power saving display device by adjusting the touch area lighting according to the present invention, the present invention is not limited thereto, and various modifications are made within the scope of the claims and the specification and the accompanying drawings. It is possible to implement, and this also belongs to the scope of the present invention.

10-display, 20-touch sensor, 30-backlight, 32-light emitting element
40-backlight driver, 50-controller

Claims (7)

The touch sensor detects the touch point touched by the user,
Set the area to adjust the brightness of the backlight in the control unit based on the portion detected by the touch sensor,
The control unit transmits a control signal to the backlight driver to adjust the backlight brightness of the area,
The backlight driving unit is a power saving method through the touch area lighting control comprising the step of adjusting the backlight brightness by adjusting the driving voltage. The method according to claim 1,
When the touch sensor detects the touch point, the inclination sensor detects the inclination value of the display unit and transmits the inclination value to the control unit.
The control unit saves power through the touch area lighting control to set the brightness of the backlight to an area to which the horizontal or vertical inclination value is applied by using the inclination value detected by the inclination sensor in addition to the portion detected by the touch sensor. . The method according to claim 1 or 2,
According to a control signal for adjusting the brightness transmitted from the control unit to the backlight driver, the backlight driver adjusts the touch area lighting control to adjust the driving voltage applied to the backlight to darken or turn off the brightness of the backlight of the corresponding area. How to save power. The method according to claim 1 or 2,
And setting the size of the area to be adjusted according to the area extension value selected by the user when setting the area to adjust the brightness of the backlight. A display unit constituting a plurality of pixels and displaying an image according to a control signal given to each pixel;
A touch sensor disposed to be installed for each pixel or a predetermined area of the display unit and detecting a touch point of a user;
A backlight disposed in each pixel or a predetermined area of the display unit and having a brightness adjusted according to a control signal;
A backlight driver for controlling brightness by adjusting a driving voltage applied to the backlight;
And a controller configured to transmit a control signal to the backlight driver to adjust backlight brightness according to whether the touch sensor detects a touch point. The method according to claim 5,
The controller generates a control signal to control the backlight brightness of the area corresponding to the touch point detected by the touch sensor darker than other areas, and transmits the control signal to the backlight driver. The method according to claim 5 or 6,
Further comprising a tilt sensor for detecting the tilt of the display unit,
The control unit is configured to transmit a control signal for adjusting the brightness of the backlight to the area corresponding to the inclination value by using the inclination value input from the inclination sensor.

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