WO2018030760A1

WO2018030760A1 - Apparatus and method for controlling luminance of oled display device

Info

Publication number: WO2018030760A1
Application number: PCT/KR2017/008567
Authority: WO
Inventors: 나근식; 권제영
Original assignee: (주)코텍
Priority date: 2016-08-12
Filing date: 2017-08-08
Publication date: 2018-02-15
Also published as: KR101853402B1; KR20180018971A

Abstract

The present invention relates to an apparatus and a method for controlling the luminance of an OLED display device, the apparatus comprising: a sensor unit for detecting the distance from the OLED display device to a user in front thereof and recognizing the face of the user; and a control unit for analyzing the face of the user detected through the sensor unit, recognizing the degree of concentration of the user according to whether the user directly views the OLED display device, and controlling the luminance of the OLED display device on the basis of the detected distance and information on the degree of concentration of the user.

Description

Device and method for controlling luminance of ODL display device

The present invention relates to a brightness control device and method of an LED display device, and more particularly, to extend the life of the OLED display device by adjusting the brightness according to the distance and concentration of the user and the OLED display device. The present invention relates to a luminance control device and a method of an LED display device.

Recently, the use of a display device (eg, a monitor) to which an organic light emitting diode (OLED) is applied is increasing.

The OLED is capable of realizing a color close to natural color, and has a characteristic that the response speed is 1000 times faster than the conventional LCD (LCD: Liquid Crystal Display) and does not require a backlight. As a lot has been applied.

However, since an OLED display device displays an image by emitting light instead of a backlight unit (BLU) due to the nature of OLED, an OLED display is displayed when a bright image is displayed for a long time. The problem arises that the overall life of the device is significantly shortened.

Background art of the present invention is disclosed in Republic of Korea Patent Publication No. 10-2016-0020088 (published on Feb. 23, 2016, UWB sensor-based power saving and brightness control function and method).

According to an aspect of the present invention, the present invention was created to solve the above problems, by adjusting the luminance according to the distance and the concentration of the user and the OLED display device (OLED Display Device), SUMMARY OF THE INVENTION An object of the present invention is to provide an apparatus and method for controlling luminance of an LED display device, which can prolong the service life.

In accordance with an aspect of the present invention, an apparatus for controlling a brightness of an LED display device includes: a sensor unit configured to detect a distance from an LED display device to a user in front and recognize a face of the user; And analyzing the face of the user detected by the sensor unit to recognize the concentration of the user according to whether the ODL display is directly viewed, and to determine the luminance of the OLED display based on the detected distance and the concentration information of the user. And a control unit for adjusting.

In the present invention, the control unit adjusts the brightness according to the distance and the concentration information of the user based on the setting information of the smart standing mode (SSM) mode, the setting information of the SSM mode, SSM on / off settings, At least one or more of the SSM strong / medium / weak setting, the minimum detection distance setting, the maximum detection distance setting, the response time setting.

In the present invention, the sensor unit, the camera sensor for detecting the user's face in front of the ODL display device, the distance sensor for detecting the distance from the ODL display device to the user, and the illumination to detect the ambient illuminance It characterized in that it comprises at least one or more of the sensors.

In the present invention, when the camera sensor is a dual camera sensor, the controller photographs the front user by using the dual camera sensor in a three-dimensional image, the front by the depth (Depth) of the photographed three-dimensional image Computing the distance to the user in the characterized in that.

In the present invention, the control unit recognizes the user's face photographed by the sensor unit, and the concentration is high if the user is looking directly at the ODL display device, and the concentration is low if the user is not facing the OLED display device. It is characterized by judging.

In the present invention, the controller detects an ambient illuminance through an illuminance sensor of the sensor unit, and when the detected ambient illuminance is brighter than a preset first reference, the luminance of the OLED display device is greater than a default value. If the peripheral ratio is darker than the second reference, the luminance of the OLED display device is lowered by a preset ratio from the default value, and the peripheral illuminance is adjusted to the first reference and the second reference. In the case of, the brightness of the OLED display device is adjusted to a default value.

In the present invention, the controller divides the distance into at least three sections, and when the user is in the first section, adjusts the luminance to a preset maximum value regardless of the concentration of the user on the ODL display device, If the user is in the second section, the brightness is adjusted to a preset default value according to the user's concentration and distance to the ODL display device, and if the user is in the third section, it is correlated to the user's concentration on the ODL display device. It is characterized in that the luminance is adjusted to a predetermined minimum value without.

In the present invention, the control unit waits for a predetermined response time and executes brightness adjustment in order to prevent an undesired frequent brightness adjustment operation when adjusting the brightness according to the change in concentration.

In the present invention, the control unit, when adjusting the brightness according to the change in the concentration, the brightness corresponding to the brightness reduction amount set according to the user concentration in the Smart Standing Mode (SSM) mode at the default value for the brightness adjustment according to each section It is characterized by the downward adjustment.

According to another aspect of the present invention, there is provided a method of controlling a brightness of an LED display device, the control unit including: checking whether a smart standing mode (SSM) mode of the LED display device is set to ON; If it is determined that the SSM mode is set to ON, the control unit recognizes a user's face through a sensor unit and detects a distance from the ODL display device to the user; Determining a current section in which the user is located based on the result; And according to the determined current section, the controller adjusts the brightness of the LED display device to a default value set based on distance information, or additionally reflects the user's concentration information to the distance information of the LED display device. Adjusting the brightness; characterized in that it comprises a.

In the present invention, if the current section is a first section of three preset sections, the controller adjusts the brightness of the ODL display device to a preset maximum value regardless of the concentration of the user's ODL display device. It is characterized by.

In the present invention, if the current section is the second section of the three preset sections, the controller determines the concentration of the user's OID display device, and if the concentration of the user is low, the brightness default value corresponding to the distance. The luminance is adjusted downward in response to the " increased luminance reduction amount according to the strong / medium / weak mode of the SSM.

In the present invention, if the current section is a third section of three preset sections, the controller is configured to adjust the brightness of the ODL display device to a predetermined minimum regardless of the concentration of the user's ODL display device. It features.

In the present invention, the smart standing mode (SSM) mode is a method of adjusting the brightness of the OLED display device according to whether or not the user is focused on the OLED display, and the user and the LED Combining the method of adjusting the brightness of the OLED display device according to the distance between the display devices, the mode for respectively adjusting the brightness for each preset section based on the distance to the OLED display device. It is characterized by.

According to an aspect of the present invention, the present invention is to adjust the brightness according to the distance and concentration of the user and the OLED display device, thereby extending the life of the OLED display device.

1 is an exemplary view showing a schematic configuration of a luminance control device of an LED display device according to an embodiment of the present invention.

FIG. 2 is an exemplary view illustrating a graph for explaining a method for controlling luminance of an LED display device in a smart standing mode (SSM) method according to an embodiment of the present invention; FIG.

FIG. 3 is an exemplary view showing a table in which a ratio of decreasing luminance at a default value according to the concentration of a user when controlling the brightness of an LED display device in a smart standing mode (SSM) method according to an embodiment of the present invention is shown. .

FIG. 4 is an exemplary diagram for describing a method of recognizing a distance and a concentration level from an ODL display device to a user in FIG. 1.

5 is an exemplary view for explaining the determination of the concentration by analyzing the face of the user photographed using the camera sensor in FIG.

6 is an exemplary view showing a basic information setting screen for adjusting the brightness of an LED display device in a smart standing mode (SSM) method according to an embodiment of the present invention.

7 is a flowchart illustrating a brightness control method of an LED display device according to an embodiment of the present invention.

Hereinafter, an embodiment of a luminance control device and method of an LED display device according to the present invention will be described with reference to the accompanying drawings.

In this process, the thickness of the lines or the size of the components shown in the drawings may be exaggerated for clarity and convenience of description. In addition, terms to be described below are terms defined in consideration of functions in the present invention, which may vary according to the intention or convention of a user or an operator. Therefore, the definitions of these terms should be made based on the contents throughout the specification.

As shown in FIG. 1, the OLED display device 100 according to the present embodiment includes a sensor unit 110, a controller 120, a luminance driver 130, and an OLED display unit 140. It includes.

The sensor unit 110 detects a face of a user in front of the ODL display device 100 (for example, a camera sensor), a sensor for detecting a distance (for example, a distance sensor), and a peripheral illumination sensor. It includes at least one or more of the sensors (eg, illuminance sensor) (see Figure 4).

4 is an exemplary diagram for describing a method of recognizing a distance and concentration from an ODL display device to a user in FIG. 1, and FIGS. 4A and 4C illustrate a user using a distance sensor. Recognizing the distance to and detecting the case of high concentration of the user (a) and the case of low concentration (c) from the image taken using the camera sensor, Figures 4 (b) and (d) Calculates the distance to the user based on the depth of the 3D image photographed using the dual camera sensor, and the user's concentration is high from the image photographed using the dual camera sensor (b) and the case where the concentration is low It is shown to detect (d).

At this time, the controller 120 recognizes the user's face by using the camera sensor to recognize whether the user is looking directly at (or facing the front) the ODL display device 100 according to the present embodiment.

For example, the controller 120 may determine that the concentration is high when the user is facing the OID display device 100 and that the concentration is low when the user does not face the OID display device 100.

In the present embodiment, the camera sensor may be a dual camera sensor.

When photographing a front user as a 3D (3D) image using the dual camera sensor, the controller 120 may detect a distance to the front user by the depth of the photographed 3D image. (See FIGS. 4B and 4D), the dual camera sensor may replace the distance sensor.

The illuminance sensor detects an ambient illuminance of the LED display device 100 according to the present embodiment.

The luminance driver 130 adjusts the luminance of the OLED display 140 under the control of the controller 120.

When the ambient illuminance detected by the illuminance sensor is brighter than the first criterion, the control unit 120 may adjust the luminance of the OLED display unit 140 to a predetermined ratio upward from the default value. If it is darker than the second criterion, the luminance of the OLED display 140 may be adjusted down to a preset ratio from the default value. When the peripheral illuminance is between the first reference and the second reference, the luminance of the OLED display 140 may be adjusted to a default value.

In addition, the control unit 120 adjusts the brightness of the OLED display unit 140 according to the distance from the ODL display device 100 according to the present embodiment to the user in front of the display device, and adjusts the distance by at least two. User's inconvenience caused by the change in brightness by adjusting the brightness of OLED display unit 140 in different ways for each section by dividing into more than one section (for example, 1st section, 2nd section, 3rd section) (Or rejection) can be minimized and the life of the OLED display 140 can be extended (see FIG. 2).

Here, the three sections for adjusting the brightness are merely divided sections for convenience of description. Therefore, according to an embodiment, it may be set to more sections or fewer sections.

In addition, the controller 120 analyzes the face of the user photographed using the camera sensor to recognize whether the user is facing the ODL display 100 (that is, focusing on the ODL display). 5, the brightness of the OLED display unit 140 may be adjusted according to whether the user is facing the ODL display device 100. FIG. 5 is an exemplary diagram for explaining determination of concentration by analyzing a face of a user photographed using a camera sensor in FIG. 1.

For example, when the user is facing (or focusing) the ODL display device 100, the controller 120 adjusts the luminance of the OLD display unit 140 upward (or adjusts the default value). If the user is not facing (or focusing) the ODL display device 100, the controller 120 adjusts the luminance of the OLD display unit 140 downward (or lower than the default value).

In this case, the method of adjusting the brightness of the OLED display unit 140 may be performed alone or in accordance with whether the user is facing (or focusing) the ODL display device 100. In accordance with the present invention, the display may be performed in combination with a method of adjusting the brightness of the OLED display unit 140.

Hereinafter, according to the present embodiment, the brightness of the OLED display unit 140 is adjusted according to whether or not the user is facing (or focusing) the OLED display device 100, and the distance may vary depending on the distance. A method of adjusting the brightness of the OLED display unit 140 by combining a method of adjusting the brightness of the LED display unit 140 (hereinafter, in the present embodiment, such a brightness control method is referred to as a smart standing Mode) will be described.

FIG. 2 is an exemplary view illustrating a graph for explaining a method for controlling luminance of an LED display device in a smart standing mode (SSM) method according to an embodiment of the present invention.

As shown in FIG. 2, in the first section (eg, the section from the ODL display device to the first point), the ODL (regardless of whether the user faces the ODL display device 100 or not) is displayed. OLED) The brightness of the display unit 140 is adjusted to a preset maximum value (eg, preset 2), and in a second section (eg, a section between the first point and the second point), the user displays an ODL display device ( Directly viewing (or concentrating) 100 may adjust the luminance of the OLED display unit 140 to a default value according to distance, and if the user does not directly face (or concentrate) the ODL display device 100, The luminance of the OLED display 140 is lowered by a predetermined ratio from a default value according to the distance, and in a third section (for example, a section above the second point), the user controls the ODL display device 100. Whether you look straight (or focus) Is the five LED (OLED), a predetermined brightness of the display unit 140, the minimum value (for example, preset 1) is adjusted to.

In this case, the adjustment of the luminance according to the concentration (that is, the degree to which the user faces the ODL display device 100) may be immediately performed when the condition is satisfied (that is, the detection of the change in concentration), but to prevent unwanted frequent luminance adjustment operations. To this end, the controller 120 waits for a predetermined response time (for example, 5 seconds) and then executes luminance adjustment.

On the other hand, the SSM (Smart Standing Mode) brightness control method according to the present embodiment is the default for the brightness control of the OLED display unit 140 according to the SSM mode setting (eg, strong, medium, weak) method. The luminance reduction amount (or luminance reduction rate) may be set differently from the value (see FIG. 3). FIG. 3 is an exemplary view showing a table in which a ratio of decreasing luminance at a default value according to the concentration of a user when controlling the brightness of an LED display device in a smart standing mode (SSM) method according to an embodiment of the present invention is shown. to be.

For example, in a state in which the user directly faces (or concentrates) the ODL display device 100 in the second section, the controller 120 defaults to the user's distance according to the user's distance. If the concentration of the user decreases while adjusting the brightness, the brightness may be adjusted downward by the amount of brightness reduction set in the table as shown in FIG. In this case, the controller 120 may adjust the luminance downward by the amount of luminance reduction set in the table as shown in FIG. 3B instead of the default value (eg, preset 1).

In FIG. 3, the luminance reduction amount in the second and third sections is described as an example, but the luminance reduction amount may also be applied to the first interval. In addition, since the luminance reduction amount described in FIG. 3 is described by way of example, the luminance reduction amount according to the strong, medium and weak modes of the smart standing mode (SSM) may be set to any other value.

6 is an exemplary view showing a basic information setting screen for adjusting the brightness of the LED display device in a smart standing mode (SSM) method according to an embodiment of the present invention.

As shown in FIG. 6, the user can apply the SSM method (whether SSM is ON or OFF), the amount of luminance reduction that can be set (eg, strong, medium, or weak) when the SSM method is applied (on), and the application of the SSM method A first point (minimum detection distance: 50 cm) for classifying sections, a second point (chleo detection distance: 100 cm) for classifying an application section of the SSM method, and a response time (for example, 5 seconds) for luminance adjustment At least one of may be set.

Here, each item set by the user (eg, SSM on / off setting, SSM strong, medium, weak setting, minimum detection distance setting, maximum setting) to adjust the brightness of the OLED display unit 140 by the SSM method. The detection distance setting, the response time setting, etc.) are set by way of example. Therefore, the value of each item may be set to different values according to embodiments.

7 is a flowchart illustrating a brightness control method of an LED display device according to an exemplary embodiment of the present invention.

As illustrated in FIG. 7, the controller 120 checks whether the smart standing mode (SSM) mode of the LED display device 100 according to the present exemplary embodiment is set to ON (S101).

The smart standing mode (SSM) mode is a method of adjusting the brightness of the OLED display unit 140 according to whether a user is facing (or focusing) the ODL display device 100, and The brightness of the OLED display 140 is adjusted by combining a method of adjusting the brightness of the OLED display 140 according to a distance between a user and the OLED display 100. Means mode.

As a result of the check, if the smart standing mode (SSM) mode is set to ON (YES in S101), the controller 120 recognizes the user's face through the sensor unit 110 and the OLED display device. The distance from 100 to the user is detected (S102).

The controller 120 determines whether the luminance control section (eg, the first section, the second section, and the third section) has been changed based on the distance information among the detected information (S103).

If SSM mode is executed for the first time, the section is regarded as changed.

Next, if it is determined in step S103 that the section is changed (YES in S103), the controller 120 determines the changed section (ie, the current section) (S104).

As a result of the section determination (S104), if the user is in the first section (section from the LED display device to the first point), the controller 120 waits according to a predetermined response time (for example, 5 seconds). The luminance of the OLED display unit 140 is adjusted to a preset maximum value (eg, preset 2) regardless of whether the user looks directly at (or concentrates on) the ODL display device 100 (S106). .

Next, as a result of the section determination (S104), if the user is in the second section (section between the first point and the second point), the control unit 120 faces the user to the OID display device 100 (or concentrates). (S105). If the user is facing (or concentrating) the ODL display device 100 according to the result of the determination (S105) (YES in S105), the controller 120 may determine a predetermined response time (eg, 5 seconds). After waiting, the luminance of the OLED display 140 is adjusted to a default value according to the distance (S107).

However, as a result of determining the concentration of the user in the second section (S105), if the user is not facing (or focusing) the ODL display device 100 (NO in S105), the controller 120 may advance in advance. After waiting according to the specified response time (for example, 5 seconds), the luminance is adjusted downward in response to the "luminosity default value corresponding to the distance-the amount of the luminance reduction according to the SSM intensity, medium and weak mode" (S108). .

On the other hand, as a result of the section determination (S104), if the user is in the third section (for example, the second point or more section), the controller 120 waits according to a predetermined response time (for example, 5 seconds), and then the user Irrespective of whether the OLED display device 100 is directly facing (or focused) the luminance of the OLED display unit 140 is adjusted to a preset minimum value (eg, preset 1).

Although not specifically illustrated in the drawing, it may be applied to adjust the luminance according to the concentration in the third section. In this case, the predetermined luminance reduction amount (or luminance reduction rate) is applied as described with reference to FIG. 3. can do.

For reference, in the present exemplary embodiment, the luminance of the LED display device 100 is set to a minimum value (for example, preset 1) without turning off the brightness of the LED display device 100% (dark power state) in the third section. It is recognized that 100) is operating normally.

As described above, the present embodiment adjusts the luminance according to the distance between the user and the OLED display device 100 and the concentration of the user, thereby minimizing the discomfort or rejection of the user due to the change in luminance, There is an effect to extend the life of the LED display unit.

Although the present invention has been described with reference to the embodiments illustrated in the drawings, this is merely exemplary, and various modifications and equivalent other embodiments are possible for those skilled in the art to which the art pertains. I will understand the point. Therefore, the technical protection scope of the present invention will be defined by the claims below.

Claims

A sensor unit for detecting a distance from the ODL display device to the front user and recognizing a face of the user; And

Analyzes the user's face detected by the sensor unit to recognize the concentration of the user according to whether the OID display device is directly viewed, and adjusts the luminance of the OID display device based on the detected distance and the concentration information of the user. And a controller configured to control the luminance of the LED display device.
The method of claim 1, wherein the control unit,

The brightness is adjusted according to the distance and the concentration information of the user based on the setting information of the smart standing mode (SSM) mode,

The setting information of the SSM mode may include at least one of an SSM on / off setting, an SSM high / medium / weak setting, a minimum detection distance setting, a maximum detection distance setting, and a response time setting. Brightness control device.
The method of claim 1, wherein the sensor unit,

And at least one of a camera sensor detecting a user's face in front of the ODL display device, a distance sensor detecting a distance from the ODL display device to a user, and an illumination sensor detecting a peripheral illuminance. A luminance control device of an LED display device.
The method of claim 3, wherein

If the camera sensor is a dual camera sensor,

The controller uses the dual camera sensor to photograph the front user as a 3D image, and then calculates the distance to the front user by the depth of the captured 3D image. A luminance control device of the display device.
The method of claim 1, wherein the control unit,

Recognizing the user's face photographed by the sensor unit, if the user is looking directly at the ODL display device, high concentration, if not looking directly at the OID display device, OID characterized in that the low concentration A luminance control device of the display device.
The method of claim 1, wherein the control unit,

Peripheral illuminance is detected through an illuminance sensor of the sensor unit, and when the detected peripheral illuminance is brighter than a first preset reference, the luminance of the OLED display device is adjusted upwardly by a preset ratio,

On the contrary, when the ambient illuminance is darker than the second reference, the luminance of the OLED display device is lowered by a preset ratio from the default value.

And adjusting the luminance of the OLED display to a default value when the peripheral illuminance is between the first reference and the second reference.
The method of claim 1, wherein the control unit,

By dividing the distance into at least three sections,

When the user is in the first section, the luminance is adjusted to a preset maximum value regardless of the concentration of the user on the ODL display device.

If the user is in the second section, the brightness is adjusted to a preset default value according to the user's concentration and distance to the ODL display device,

If the user is in the third section, the luminance control device of the LED display device, characterized in that the brightness is adjusted to a predetermined minimum regardless of the concentration of the user with respect to the LED display device.
The method of claim 7, wherein the control unit,

In order to prevent the unwanted frequent brightness adjustment operation when adjusting the brightness according to the change of concentration,

The luminance control device of the LED display device, characterized in that to wait for a predetermined response time (Response Time) and to perform the brightness adjustment.
The method of claim 7, wherein the control unit,

When adjusting the brightness according to the change of concentration,

The luminance control device of the LED display device, characterized in that the luminance is adjusted downward in response to the luminance reduction amount set according to the user concentration in the smart standing mode (SSM) mode from the default value for the luminance adjustment set in each section.
Checking, by the controller, whether the smart standing mode (SSM) mode of the LED display device is set to ON;

If the SSM mode is set to ON, the control unit recognizes the user's face through the sensor unit and detects the distance from the ODL display device to the user:

Determining, by the controller, a current section in which a user is based on the distance information; And

According to the determined current section, the controller adjusts the brightness of the LED display device to a default value set based on distance information, or additionally reflects the user's concentration information on the distance information to display the brightness of the LED display device. And adjusting the brightness of the LED display device.
The method of claim 10,

If the current section is a first section of three preset sections,

The controller may control the brightness of the LED display device to a predetermined maximum value regardless of the concentration of the user's LED display device.
The method of claim 10,

If the current section is a second section of the three preset sections,

The control unit determines the concentration of the user's OID display device, and if the concentration of the user is low, the luminance corresponds to the luminance default value corresponding to the distance-the amount of luminance decrease according to the SSM intensity, medium, or weak mode. The brightness control method of the LED display device characterized in that the downward adjustment.
The method of claim 10,

If the current section is a third section of the three preset sections,

The controller may control the brightness of the LED display device to a predetermined minimum regardless of the concentration of the user's LED display device.
The method of claim 10, wherein the smart standing mode (SSM) mode,

A method of adjusting the brightness of the OLED display device according to whether a user is focusing on the OLED display device, and

By combining a method of adjusting the brightness of the OLED display device according to the distance between a user and the OLED display device,

The brightness control method of the LED display device, characterized in that the mode for adjusting the brightness for each of the predetermined interval based on the distance to the OLED display device.