KR20170097469A - Display apparatus using a three-dimensional image sensor, AND method of power saving thereof - Google Patents

Display apparatus using a three-dimensional image sensor, AND method of power saving thereof Download PDF

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Publication number
KR20170097469A
KR20170097469A KR1020160019264A KR20160019264A KR20170097469A KR 20170097469 A KR20170097469 A KR 20170097469A KR 1020160019264 A KR1020160019264 A KR 1020160019264A KR 20160019264 A KR20160019264 A KR 20160019264A KR 20170097469 A KR20170097469 A KR 20170097469A
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South Korea
Prior art keywords
display unit
power
pixel
turning
person
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KR1020160019264A
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Korean (ko)
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성혜정
장윤희
김유라
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금오공과대학교 산학협력단
성혜정
장윤희
김유라
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Priority to KR1020160019264A priority Critical patent/KR20170097469A/en
Publication of KR20170097469A publication Critical patent/KR20170097469A/en

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    • H04N5/23241—
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/41—Structure of client; Structure of client peripherals
    • H04N21/422—Input-only peripherals, i.e. input devices connected to specially adapted client devices, e.g. global positioning system [GPS]
    • H04N21/42201—Input-only peripherals, i.e. input devices connected to specially adapted client devices, e.g. global positioning system [GPS] biosensors, e.g. heat sensor for presence detection, EEG sensors or any limb activity sensors worn by the user
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/222—Studio circuitry; Studio devices; Studio equipment
    • H04N5/2224—Studio circuitry; Studio devices; Studio equipment related to virtual studio applications
    • H04N5/2226—Determination of depth image, e.g. for foreground/background separation
    • H04N5/23219—

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  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biomedical Technology (AREA)
  • Biophysics (AREA)
  • General Health & Medical Sciences (AREA)
  • Neurosurgery (AREA)
  • Health & Medical Sciences (AREA)
  • Computer Vision & Pattern Recognition (AREA)
  • Controls And Circuits For Display Device (AREA)

Abstract

According to the present invention, a display device using a three-dimensional image sensor comprises: a three-dimensional image sensor for capturing a color image and a depth image using infrared rays; an operation control unit for processing the depth image to separate an object and a background therefrom so as to perform an object recognition for recognizing the object, and processing a pixel for recognizing a motion of the object on the basis of a pixel differential value between a previous frame and a current frame of the color image; and a display unit having power turned on and off in accordance with the recognition of the object by the operation control unit. The display device of the present invention can efficiently perform a power saving function by using the depth image and color image collected by the three-dimensional image sensor.

Description

[0001] The present invention relates to a display device using a three-dimensional image sensor and a power saving method thereof,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a display device having a power saving function, and more particularly, to a display device that performs a power saving function using a three-dimensional image sensor and a power saving method thereof.

The global smart TV market is growing rapidly. In particular, in Korea, smart TV purchases have risen sharply every year.

Smart TV is a multi-function TV that can combine Internet access with TV and various apps to utilize various functions such as web surfing, VOD watching, SNS, and games. It can download contents in real time on the Internet, and acts as a communication center for instantly checking news, weather, and e-mail.

The use area and usage pattern of TV are changed, and it is getting out of the classical area to see when it is needed for a while. In fact, many households already tend to turn on for a long time without using TV. A survey of 6,042 household members aged 13 or older residing in 3,427 households nationwide by the Korea Communications Commission in 2014 revealed that 51.7% of smartphone users and 12.4% of PC users were watching TV while watching TV in general households .

Therefore, it is expected that the power consumption will be more than the actual viewing time. Especially when the latest appliances are widely used, analysis of power supply and demand of the KPX according to the year shows that power consumption and waste are a problem. Demand for electricity has increased by an annual average of 4.6% as the economy has grown steadily over the past decade. This is lower than that of China, which has a 12.4% annual average growth rate, but it is higher than that of OECD countries, which have an annual growth rate of 1-2%. However, the idea of electricity conservation remains at a level that appeals to habits such as meeting the room temperature of 28 degrees in a public place, removing the outlet after use, and so on.

Currently, the idea of power saving is the main method of hardware solution. Typically, there are a power-saving outlet and a brightness controller using a timer.

For example, a power-saving outlet is a power-up or power-up switch. A far infrared ray sensor for human body is attached and shoots the light. When it is reflected, it recognizes that there is a person and turns on the power. If it does not come back, it turns off the power. However, this outlet can not be used for electronic devices that share the plug by turning off the power on a per-plug basis.

In the case of TV, there is a case where a separate recording device is connected to collect images. However, when the power saving method is adopted, the power of the TV is completely turned off and recording is impossible.

The present invention provides a display device and a power saving method that can efficiently perform a power saving function using a depth image and a color image collected from a three-dimensional image sensor.

According to an embodiment of the present invention, there is provided a three-dimensional image sensor for capturing a depth image using infrared rays and a color image; The depth image is processed to separate an object and a background, an object recognition process for recognizing an object, and a pixel process for grasping the motion of the object based on a pixel difference value between a previous frame and a current frame of the color image An operation control unit configured; And a display unit in which the power is turned on and turned off according to whether or not the object is recognized in the operation control unit.

In addition, the operation control unit turns on the power of the display unit when at least one shape of the person is detected in the object recognition process.

The operation control unit turns on the power of the display unit when at least one shape of the person is detected in the object recognition process and the pixel difference value exceeds the reference value in the pixel process do.

The operation control unit may maintain the current power state of the display unit when at least one shape of the person is detected in the object recognition process and the pixel difference value does not exceed the reference value in the pixel process .

The operation control unit turns off the power of the display unit when at least one shape of the person is not detected in the object recognition process.

According to another embodiment of the present invention, there is provided a method of processing a depth image using infrared rays, the method comprising: performing an object recognition process of recognizing an object by separating an object and a background from each other; Performing pixel processing for grasping the motion of the object based on a pixel difference value between a previous frame and a current frame of the color image; And a step of turning the display unit on and off according to whether or not the object recognizing process and the pixel process recognize the object, and a power saving method of the display device using the three-dimensional image sensor, do.

The turning on and turning off the display unit may turn on the power of the display unit when at least one shape of the person is detected in the object recognition process do.

The turning on and turning off of the display unit may include detecting at least one shape of a person in the object recognition process and, when the pixel difference value exceeds the reference value in the pixel process, And turning on the power of the display unit.

In addition, turning on and turning off the display unit may include detecting at least one shape of a person in the object recognition process, and when the pixel difference value does not exceed the reference value , And the current power state of the display unit is maintained.

The turning on and turning off the display unit may turn off the power of the display unit when at least one shape of the person is not detected in the object recognition process .

A display device using a three-dimensional image sensor and a power saving method thereof according to an embodiment of the present invention,

It is possible to automatically turn on (turn off) and turn off (turn off) the power of the display unit such as a smart television after detecting the presence of an object (person) by using the depth image using infrared rays and the color image simultaneously, Power consumption can be reduced.

In addition, since the depth image using infrared rays and the color image are simultaneously used to perform the power saving function, the recognition rate of the object (person) is very high, and the reliability of the power saving function is increased by the high recognition rate.

1 is a configuration diagram of a display device using a three-dimensional image sensor according to an embodiment of the present invention.
2 is a view showing an object recognition process using a depth image.
3 is a diagram illustrating a pixel processing process using a color image.
4 is a flowchart illustrating a power saving method of a display device using a three-dimensional image sensor according to an embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings, in order to facilitate a person skilled in the art to easily carry out the technical idea of the present invention.

1 is a configuration diagram of a display device 1 using a three-dimensional image sensor according to an embodiment of the present invention.

The display device 1 using the three-dimensional image sensor according to the present embodiment includes only a simple structure for clearly explaining the technical ideas to be proposed.

Referring to FIG. 1, a display device 1 using a three-dimensional image sensor includes a three-dimensional image sensor 100, an operation control unit 200, and a display unit 300.

Here, the three-dimensional image sensor 100 may include infrared ray depth sensors 111 and 112 and a video camera 120.

The detailed configuration and main operation of the display device 1 using the above-described three-dimensional image sensor will be described below.

The three-dimensional image sensor 100 photographs a depth image and a color image using infrared rays. In this embodiment, the three-dimensional image sensor 100 includes infrared ray depth sensors 111 and 112 and a video camera 120.

The infrared ray depth sensors 111 and 112 are configured to detect a depth image including a distance value of an object to be imaged. The infrared depth sensors 111 and 112 include at least one infrared sensor, and each infrared sensor may include an infrared transmitter and an infrared receiver.

The infrared depth sensors 111 and 112 may be configured to measure a distance to an object and to detect the object based on a distance value similar to the object.

The image camera 120 photographs a color image defined as an image of a color image, and is configured to photograph a continuous image.

Meanwhile, the operation control unit 200 may process the depth image of the infrared depth sensors 111 and 112 to perform an object recognition process of separating the object and the background and recognizing the object. - Object recognition processing -

In addition, the operation control unit 200 can perform pixel processing for grasping the movement of the object based on the pixel difference value between the previous frame and the current frame of the color image of the image camera 120. [ - Pixel processing -

A detailed description of the object recognition process and the pixel process performed by the operation control unit 200 will be described later.

The display unit 300 performs a power saving operation by turning on and off the screen power according to whether the operation control unit 200 recognizes the object or not. For reference, the display unit 300 may be defined as a smart television, a monitor, or the like, which is composed of an LCD and an LED panel.

Turning the power on or off in this embodiment means that the screen of the display unit 300 is turned on or turned on or turned off when the screen is not turned off ) - state.

That is, the power supplied to the display device 1 is not directly controlled, but means TURN ON / TURN OFF of the screen display state. Therefore, when the display unit 300 is turned off, only the screen is not displayed, and the reservation function, the recording function, and the audio output operation can be continued.

2 is a view showing an object recognition process using a depth image.

Referring to FIG. 2, the first drawing 11 of FIG. 2 shows a general color image, and the second drawing 12 shows a depth image corresponding to a color image.

That is, the infrared depth sensors 111 and 112 are configured to measure a distance to an object, detect an object based on a distance value similar to the object, and output a depth image. That is, the depth image basically includes distance information and can be displayed in the form of a silhouette image-an outline image of the object.

Therefore, the depth image can provide position data of 20 main skeletons constituting the human body, and information of the body part corresponding to the skeleton can be easily obtained by using the corresponding joint point. Therefore, it is possible to detect whether a person (object) is located in front of the display device 1. [

Since the object recognition process (object recognition) uses an infrared sensor, the object can be easily tracked even in a dark environment where the light is weak.

3 is a diagram illustrating a pixel processing process using a color image.

Referring to FIG. 3, a first drawing 22 of FIG. 3 shows a frame screen of a previous image, and a second drawing 23 shows a frame screen of a current image.

The operation control unit 200 can perform pixel processing for grasping the motion of an object based on the pixel difference value between the previous frame and the current frame of the color image of the image camera 120. When the pixel difference value exceeds the reference value It is judged that the movement of the object is proceeding.

That is, since the pixel values of the previous frame and the current frame of the color image can not be completely equal due to the influence of illumination or the like, for example, about 0.2% to 1% of 640 * 480 pixels have different color information It can be judged that the object has moved. At this time, only when the difference in color value of each pixel (RGB) is 50 or more, it is counted that it has different color information. - Assume that each color value of RGB has a range from 0 to 255 -

Pixel processing distinguishes the movement of the object with the color difference value. Therefore, the change of the color value due to illumination or wind can be discriminated from the similar color and excluded from the power saving operation.

Basically, the operation control unit 200 can turn on the power of the display unit 300 when at least one shape of a person is detected in the object recognition process. That is, the display unit 300 turns on only when it is detected that the shape of the person is detected while the power of the display unit 300 is turned off.

When at least one shape of a person is detected in the object recognition process and the pixel difference value exceeds the reference value in the pixel processing at the same time, the operation control unit 200 turns on the power of the display unit 300 (TURN ON ). That is, when the power of the display unit 300 is turned off, the shape of the human being is detected, and only when the pixel difference value of the color image exceeds the reference value, it is turned on.

The operation control unit 200 maintains the current power state of the display unit 300 when at least one shape of the person is detected in the object recognition process and the pixel difference value does not exceed the reference value in the pixel process.

That is, when at least one shape of a person is detected in the object recognizing process while the display unit 300 is turned on (TURN ON), and the pixel difference value does not exceed the reference value in the pixel process, It is determined that the display unit 300 is in use, so that the apparatus is maintained in the TURN ON state.

When at least one shape of a person is detected in the object recognizing process while the display unit 300 is in the TURN OFF state and the pixel difference value does not exceed the reference value in the pixel process, (TURN OFF) state because the display unit 300 is not used in the state-sleep state, and the like.

In addition, the operation control unit 200 turns off the power of the display unit 300 when at least one shape of the person is not detected in the object recognition process. That is, since the display unit 300 is not used to indicate that the person is not around, the power is turned off and the power saving mode is entered.

For reference, the display unit 300 may be turned off at the same time as the speaker, and the speaker may be configured to continuously output the voice. Also, the display unit 300 may be turned off (TURN OFF), and the speakers may be sequentially turned off (TURN OFF) after a predetermined time elapses.

In addition, when the display unit 300 is turned off by the operation control unit 200, it is preferable that the turn-off is turned off after a predetermined time delay by the built-in timer.

4 is a flowchart illustrating a power saving method of a display device using a three-dimensional image sensor according to an embodiment of the present invention.

Referring to the flowchart of FIG. 4, the process of the power saving method of the display device 1 using the three-dimensional image sensor will be described below.

A power saving method of a display device using a three-

First, a depth image using infrared rays is processed to separate an object and a background, and an object recognition process for recognizing an object is performed (S10, S20).

Next, a step S30 and step S40 of performing pixel processing for grasping the movement of the object based on the pixel difference value between the previous frame and the current frame of the color image are performed.

Next, steps S50, S60, and S70 for turning on and off the display unit according to whether the object is recognized by the object recognition process and the pixel process are performed.

An example of the process of the power saving method of the display device will be described as follows.

First, in a state in which the display unit 300 is turned on,

If at least one object (person) is not recognized in the process of processing the depth image, the display unit 300 turns off the power and turns to the power saving state.

In this case, when one or more objects (persons) are recognized, the color image processing is performed. If the difference between the pixel values exceeds the reference value, the person is recognized as a state using the moving state- TURN ON) state is maintained. On the other hand, even if the pixel value difference does not exceed the reference value, since the person is recognized, the turn-on state is maintained.

Next, in a state in which the display unit 300 is turned off,

If at least one object (person) is not recognized in the process of processing the depth image, the display unit 300 maintains the power-off state (TURN OFF).

In this case, when one or more objects (persons) are recognized, the color image processing is performed. When the difference between the pixel values exceeds the reference value, the person is recognized as a state using the moving state-display unit 300, (300) is turned on (TURN ON). On the other hand, if the pixel value difference does not exceed the reference value, the display unit 300 is not used in the state where the person is not moving, such as a sleeping state, and thus the turn off state is maintained.

For reference, the step of TURN ON and TURN OFF of the display unit may proceed to TURN ON the power of the display unit when at least one shape of a person is detected in the object recognizing process .

In the step of turning the display unit on and turning off the display unit, at least one shape of a person is detected in the object recognition process. When the pixel difference value exceeds the reference value in the pixel processing, (TURN ON).

The step of TURN ON and TURN OFF of the display unit may be such that at least one shape of a person is detected in the object recognition process and if the pixel difference value in the pixel processing does not exceed the reference value, And may be operative to maintain the current power state.

The step of turning on and off the display unit may be operated to turn off the power of the display unit when at least one shape of the person is not detected in the object recognition process have.

Illuminance Number of attempts Recognition success Recognition rate sunlight 50 49 98% Fluorescent lamp 50 50 100% Cancer 50 50 100%

Street Number of attempts Recognition success Recognition rate 1m 50 45 90% 1.5m 50 50 100% 2m 50 50 100% 3m 50 49 98%

Table 1 shows the recognition rate according to the brightness, and Table 2 shows the recognition rate according to the distance.

In Table 1, brightness was divided into three ranges, and each experiment was performed 50 times. The distance was set at 2m, and the time it took to recognize was limited to 10 seconds.

Table 2 shows that the distance was divided into four ranges and each experiment was performed 50 times. The time it takes to recognize is limited to 10 seconds.

The display device 1 using the three-dimensional image sensor can be configured to set the recognition sensitivity to one to five levels, and can select a mode capable of recognizing the fine operation. The fine recognition mode is defined as a mode capable of detecting blinking of an eye, change of an angle of a face, and the like.

On the other hand, the display device 1 using the three-dimensional image sensor can be distinguished from a pet and other objects by detecting a shape of a person, and can be configured to determine a human posture.

That is, it is possible to judge whether the person is in the sleep state by judging the length and posture of the body part of the person, and to control the power supply of the display unit 300 according to the determination result.

For example, when the person is lying down, the sleep state may be determined by taking into consideration the time for measuring the angle between the head, the waist, the hip, the knee and the foot and maintaining the angle.

A display device using a three-dimensional image sensor and a power saving method thereof according to an embodiment of the present invention,

It is possible to automatically turn on (turn off) and turn off (turn off) the power of the display unit such as a smart television after detecting the presence of an object (person) by using the depth image using infrared rays and the color image simultaneously, Power consumption can be reduced.

In addition, since the depth image using infrared rays and the color image are simultaneously used to perform the power saving function, the recognition rate of the object (person) is very high, and the reliability of the power saving function is increased by the high recognition rate.

Thus, those skilled in the art will appreciate that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. It is therefore to be understood that the embodiments described above are to be considered in all respects only as illustrative and not restrictive. The scope of the present invention is defined by the appended claims rather than the detailed description and all changes or modifications derived from the meaning and scope of the claims and their equivalents are to be construed as being included within the scope of the present invention do.

100: 3D image sensor
111, 112: Infrared depth sensor
120: Video camera
200:
300:

Claims (10)

A three-dimensional image sensor for capturing a depth image using infrared rays and a color image;
The depth image is processed to separate an object and a background, an object recognition process for recognizing an object, and a pixel process for grasping the motion of the object based on a pixel difference value between a previous frame and a current frame of the color image An operation control unit configured; And
Wherein the power is turned on (TURN ON) and turned off (TURN OFF) according to whether the object is recognized in the operation control unit
And a display device using the three-dimensional image sensor.
The method according to claim 1,
The operation control unit,
And turns on the power of the display unit when at least one shape of the person is detected in the object recognition process.
The method according to claim 1,
The operation control unit,
Wherein at least one shape of a human being is detected in the object recognition process and the power source of the display unit is turned on when the pixel difference value exceeds a reference value in the pixel processing Display device.
The method according to claim 1,
The operation control unit,
Wherein at least one shape of a person is detected in the object recognition process and the current power state of the display unit is maintained when the pixel difference value does not exceed the reference value in the pixel processing Device.
The method according to claim 1,
The operation control unit,
And turns off the power of the display unit when at least one shape of the person is not detected in the object recognizing process.
Performing an object recognition process of processing a depth image using infrared rays to separate an object and a background and recognizing an object;
Performing pixel processing for grasping the motion of the object based on a pixel difference value between a previous frame and a current frame of the color image; And
Turning on (TURN ON) and turning off (TURN OFF) the display unit according to whether the object recognizing process and the pixel process recognize the object;
Wherein the display device is a three-dimensional image sensor.
The method according to claim 6,
The turning on and turning off the display unit may comprise:
Wherein the power of the display unit is turned on when at least one shape of a person is detected in the object recognition process.
The method according to claim 6,
The turning on and turning off the display unit may comprise:
Wherein at least one shape of a human being is detected in the object recognition process and the power source of the display unit is turned on when the pixel difference value exceeds a reference value in the pixel processing A method of power saving a display device.
The method according to claim 6,
The turning on and turning off the display unit may comprise:
Wherein at least one shape of a person is detected in the object recognition process and the current power state of the display unit is maintained when the pixel difference value does not exceed the reference value in the pixel processing Power saving method of the device.
The method according to claim 6,
The turning on and turning off the display unit may comprise:
And turning off the power of the display unit when at least one shape of the person is not detected in the object recognizing process.
KR1020160019264A 2016-02-18 2016-02-18 Display apparatus using a three-dimensional image sensor, AND method of power saving thereof KR20170097469A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20200087400A (en) * 2019-01-11 2020-07-21 엘지전자 주식회사 Camera device, and electronic apparatus including the same
US12033306B2 (en) 2019-01-11 2024-07-09 Lg Electronics Inc. Camera device and electronic apparatus including the same

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20200087400A (en) * 2019-01-11 2020-07-21 엘지전자 주식회사 Camera device, and electronic apparatus including the same
US12033306B2 (en) 2019-01-11 2024-07-09 Lg Electronics Inc. Camera device and electronic apparatus including the same

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