KR101546249B1

KR101546249B1 - Ambient media system for responding to sitting posture and method for controlling ambient media responsible to sitting posture

Info

Publication number: KR101546249B1
Application number: KR1020140160375A
Authority: KR
Inventors: 조준동; 김성연; 김준호; 송승현; 안드레아반키; 홍정기; 엄정훈
Original assignee: 성균관대학교산학협력단
Priority date: 2014-11-17
Filing date: 2014-11-17
Publication date: 2015-08-21

Abstract

An ambient media system for responding to sitting posture according to the present invention may include a posture sensor part which generates a first measurement signal for spine tilt to the back of a user and a second measurement signal for the approach range from an object in front of the user, a posture which determines the posture state of the user based on the first and second measurement signals and determines a curvature level signal and a color signal according to the determined posture state, and an ambient media driving part which has a light source which generates a light effect from a tube-type branch according to the color signal and an actuator which bends a flexible tube-type branch according to the curvature level signal.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ambience media system and a control method for the ambience media system. 2. Description of the Related Art [0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention [0002] The present invention relates to an ambient media, and more particularly, to ambient media responsive to user's body information.

Media refers to a means of conveying information, and traditional media devices, typically displaying variable and dynamic information, display such information in the form of specific numbers, letters, graphs, graphics, and the like.

Traditional media devices act to draw attention to users when dynamic information has significant implications, which distracts the user and may interfere with current work. In particular, recent ubiquitous computing has developed into a way to transmit information to users at any time and anywhere by integrating information and space, and smart devices scattered in everyday space are displaying dynamic information sporadically. An information delivery method in which each piece of information competes for the attention of the user may cause the user to become fatigued and disturb the work, and the information to be delivered may be ignored or excluded. For example, a social network app on your smartphone will alert you immediately when a message arrives, but you will ignore the message or change your alarm settings if you are under stress because of a constantly ringing message arrival notification.

Compared to these traditional media devices, the ambient media technique, instead of attracting the attention of the user and actively inducing the user to perceive the information, can be a part of the surrounding environment around the user, It is a way to induce the information to convey naturally.

On the other hand, since many people spend time sitting on their chairs, sitting poses are particularly important for people's health. Scoliosis, scoliosis, turtle neck syndrome, neck disc, decreased visual acuity, dry eye, etc. can be caused or worsened by a wrong sitting position.

If traditional media devices are used as a means of conveying such physical information to the user, then traditional media devices may, for example, display numerical posture scores in numerical order to the user, To the user.

However, in the ubiquitous environment where information is abundant, the intrusive process in which the body information is competing with other information by the conventional media device attracts the attention of the user may interfere with the work that the user is concentrating on, It is highly possible that this body information is ignored or not used any more.

A haptic feedback method has been proposed in which a wearable device applies vibration to a user in order to draw attention when there is a problem in a sitting posture instead of a direct number or grade indication. Such a haptic feedback method is less aggressive than a conventional media device. However, since the vibration is suddenly applied to the skin at a time when the user is in a wrong posture but does not know it, there is a problem that the external motivation of the user due to negative compensation is reduced, For example, during work such as watching movies, it can be a decisive factor in preventing immersion.

Therefore, there is a need for an ambient media system that can transmit body information more naturally to the user through the ambient media technique.

An object of the present invention is to provide an ambient media system that responds to a sitting posture and a control method thereof.

SUMMARY OF THE INVENTION It is an object of the present invention to provide an ambient media system and a control method thereof, in which a feedback module for visualizing feedback based on a sitting posture can be harmonized with the surrounding environment.

The problem to be solved by the present invention is to provide an ambient media system and a control method thereof that enable a user to perceive the feedback in a peripheral manner, To provide.

The solution to the problem of the present invention is not limited to those mentioned above, and other solutions not mentioned can be clearly understood by those skilled in the art from the following description.

According to an aspect of the present invention, there is provided an ambient media system,

A posture sensor unit for generating a first measurement signal related to a tilt of the spine in a user's back and a second measurement signal related to a proximity distance to an object in front of the user;

A posture state determining unit that determines a posture state of the user based on the first and second measurement signals, and determines a curved level signal and a color signal according to the determined posture state; And

And an ambient media driving unit including an actuator and a light source to emit light from the tubular stem according to the color signal so that the flexible tubular stem is curved according to the curvature level signal.

According to one embodiment, the attitude-state determining unit

And a state machine for determining a posture state of the user as one of a plurality of possible posture states based on the change of the first and second measurement signals.

According to one embodiment, the posture states may be composed of at least two inappropriate posture states related to an inappropriate posture state regarding an appropriate posture and inappropriate postures differing in an appropriate degree.

According to one embodiment, the posture-state determining unit may be configured to minimize the curvature of the tubular stem when the user's posture is appropriate, and to cause the tubular stem to emit a first color, To determine the curvature level signal and the hue signal so that the curvature of the stem becomes relatively severe and the tubular stem emits a second color.

According to one embodiment, the posture-state determining unit may determine the posture of the color signal to be flickered from the tubular stem, if the posture state indicates that the user is relatively close to the user in front of the user in accordance with the second measurement signal Lt; / RTI >

According to one embodiment, the attitude determination section may be operable to determine a user's attitude state based on the first and second measured signals, and to determine a curvature level signal and a color signal according to the determined attitude state and duration have.

According to an embodiment, the posture state determination unit may operate to determine a color signal such that an area of the tube-shaped stem emitting light in a third color becomes relatively wider as the duration of the current posture state is relatively longer.

According to one embodiment, the posture state determining unit determines that the posture state determining unit determines that the posture of the tubular stem is continuously variable when the ratio of the posture states changing within a predetermined time is higher than a predetermined threshold value, Signal and a color signal.

According to one embodiment, the posture sensor portion is operative to further generate a third measurement signal for sensing that the user is sitting on a chair,

The attitude-state determining unit may determine the user's attitude state based on the first to third measured signals, and determine a curvature level signal and a hue signal according to the determined attitude state.

According to one embodiment, the actuator of the ambient media driving unit may include a wire which is fixed to one end of the tubular stem and extends to the other end of the tubular stem through the inside of the tubular stem to pull the actuator according to the curvature level signal Such that the tubular stem is curved.

A method of controlling ambient media using a computer according to another aspect of the present invention includes:

The computer comprising:

Receiving a first measurement signal relating to a vertebral tilt in a user's back and a second measurement signal relating to a proximity to an object in a user front;

Determining a posture of the user based on the first and second measurement signals;

Determining a curvature level signal and a color signal according to the determined attitude state;

Providing the curvature level signal to an actuator that bends the flexible tubular stem according to the curvature level signal; And

And providing the color signal to a light source that causes a luminous effect from the tubular stem according to the color signal.

According to one embodiment, determining the posture of the user comprises:

Determining a user's posture state using a state machine having one of a plurality of possible posture states based on a change in the first and second measurement signals.

According to one embodiment, the step of determining the curvature level signal and the color signal comprises:

When the posture of the user is appropriate, the curvature of the tubular stem is minimized and the tubular stem is caused to emit the first color, and the more inappropriate the posture of the user is, the more the curvature of the tubular stem becomes relatively deep, And determining the curvature level signal and the hue signal so that the stem emits a second color.

And determining the color signal such that a flickering light emission effect occurs from the tubular stem if the user is in an attitude state that means that the user is relatively close to an object on the user's front according to the second measurement signal.

And determining a curvature level signal and a color signal according to the determined posture state and duration.

And determining the color signal so that the area of the tubular stem to emit light in the third color is relatively wider as the duration of the current posture is relatively longer.

Determining the curvature level signal and the color signal so that the curvature of the tubular stem is continuously variable and the tubular stem emits a fourth color if the rate at which the posture states change within a predetermined time is greater than a predetermined threshold value .

According to one embodiment, the computer further comprises receiving a third measurement signal that senses that the user is sitting on a chair,

The step of determining the posture state of the user includes:

And determining a posture state of the user based on the first to third measured signals.

A computer program according to another aspect of the present invention may be recorded in a computer-readable recording medium so as to implement each step of the ambient media control method according to the embodiments of the present invention.

According to the ambient media system and the control method thereof responsive to the sitting posture of the present invention, a feedback module for visualizing the feedback according to the sitting posture can be harmonized with the surrounding environment.

According to the ambient media system and the control method thereof responsive to the sitting posture of the present invention, the feedback according to the sitting posture can make the user perceive the feedback without interfering with the concentration on the task.

The effects of the present invention are not limited to those mentioned above, and other effects not mentioned can be clearly understood by those skilled in the art from the following description.

1 is a conceptual diagram illustrating an ambient media system responsive to a sitting posture according to an embodiment of the present invention.
2 is a diagram illustrating a change in the shape of an ambient media device according to a sitting position of a user in an ambient media system responsive to a sitting posture according to an embodiment of the present invention.
FIG. 3 is a diagram illustrating a color change of an ambient media device according to a sitting position of a user in an ambient media system responsive to a sitting posture according to an exemplary embodiment of the present invention.
4 is a flowchart illustrating an ambient media control method in response to a sitting posture according to an embodiment of the present invention.

For the embodiments of the invention disclosed herein, specific structural and functional descriptions are set forth for the purpose of describing an embodiment of the invention only, and it is to be understood that the embodiments of the invention may be practiced in various forms, The present invention should not be construed as limited to the embodiments described in Figs.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. The same reference numerals are used for the same constituent elements in the drawings and redundant explanations for the same constituent elements are omitted.

1 is a conceptual diagram illustrating an ambient media system responsive to a sitting posture according to an embodiment of the present invention.

Referring to FIG. 1, the ambient media system 10 responsive to a sitting posture may include a posture sensor unit 11, a posture state determination unit 12, and an ambient media driving unit 13.

The posture sensor unit 11 generates a first measurement signal related to a tilt of the user and a second measurement signal related to a proximity distance to an object on the front side of the user in the user's back, More signals can be generated.

The posture state determination section 12 determines the posture state of the user on the basis of the first and second measurement signals or on the basis of the first to third measurement signals according to the embodiment, A curvature level signal and a color signal.

The attitude determination unit 12 may be implemented by a program code running on a personal computer or by uploading a program code to a general purpose programmable device such as a programmable logic device (PLD) or a field programmable gate array (FPGA) .

The ambient media driving unit 13 includes an actuator 132 and a light source 133 to emit light from the tubular stem 131 according to a color signal so that the flexible tubular stem 131 is appropriately curved according to a curvature level signal can do.

The ambient media driver 13 can be laid out like a large floral flower pot and placed as a decoration on the user's desk.

A light source 133 is provided in the tubular stem 131 and the actuator 132 is provided at the lower end of the tubular stem 131 like a flowerpot It may be hidden inside the cylindrical container.

The embodiments of the present invention allow the actuator 132 and the light source 133 of the ambient media drive unit 13 to be controlled by the attitude determination unit 12 based on the measurement signals of the attitude sensor unit 11, The user can naturally function as a part of the working environment without forcibly drawing attention and can induce the user to indirectly understand his or her posture or to correct the posture.

In one embodiment, the posture sensor unit 11 includes a tilt sensor 111 attached to the user's back, for example, near the spine between the neck and back and capable of measuring the relative movement with the tilt of the vertebra, The first measurement signal can be generated using the tilt sensor 111 of three axes and six axes to nine axes. The tilt sensor 111 is also called a gyro acceleration sensor, and can output three-axis tilt information and three-axis rotation angle information.

The posture sensor unit 11 includes a proximity sensor 112 capable of measuring a distance of a user's face to an object in front of the user, for example, a monitor, and uses the proximity sensor 112 to measure a second measurement signal Lt; / RTI > The proximity sensor 112 may be implemented with, for example, an infrared-based distance sensor or an ultrasonic-based distance sensor.

According to the embodiment, the posture sensor unit 11 includes a pressure sensor 113 capable of detecting the action of the user sitting on the chair and further the contact center of the hip according to the sitting posture of the user, A third measurement signal capable of measuring the seating position of the user can be generated. The pressure sensor 113 may be implemented by, for example, an FSR (Force Sensitive Resistor) sensor.

On the other hand, the attitude determination section 12 specifically determines, based on the change of the first and second measurement signals or based on the change of the first through third measurement signals, And a state machine that determines the posture of the patient. Since the state machine is a well-known concept in the field of control using a computer, a description thereof will be omitted.

The plurality of posture states of the state machine may be composed of at least two inappropriate posture states related to an inappropriate posture state regarding an appropriate posture and inappropriate postures differing in an appropriate degree.

For example, the state machine may divide the inadequate posture into three levels, such as a slight inadequate posture, a normal inadequate posture, and a badly inadequate posture, and the first, second, and third measurements And to transition to another attitude state according to the signals.

According to the embodiment, in the ambient media system of the present invention, for example, the flower stem of the ambient media driver 13 is inclined more and more in proportion to the degree of the bad attitude of the user, It is possible to induce the user to recognize his / her posture state.

More specifically, according to the embodiment, the posture state determination unit 12 determines that the posture of the tubular stem 131 is minimized when the posture of the user is appropriate, and that the tubular stem 131 is, for example, The color signal and the curvature level signal can be determined.

According to the embodiment, the posture state determining unit 12 determines that the tubular stem 131 is becoming more curved and the tubular stem 131 is orange, for example, It is possible to determine the curvature level signal and the color signal so as to emit a second color such as red having the meaning of caution.

According to an embodiment, the ambient media system of the present invention may warn, for example, the attitude of the user tilting the body too close to the monitor.

For example, if the posture state determining section 12 determines that the posture state is such that the user is relatively close to the user in front of the user in accordance with the second measurement signal, Can be determined.

According to an embodiment, the ambient media system of the present invention can warn, for example, when the user maintains one posture for too long.

For example, the attitude determination unit 12 determines the attitude state of the user on the basis of the first and second measurement signals or on the basis of the first to third measurement signals, The curvature level signal and the color signal can be determined.

In this case, the posture state judging section 12 judges that the longer the duration of the current posture state is, the more likely it is to emit light in the third color, such as blue, which reminds the tubular stem 131, for example, The color signal can be determined so that the area becomes relatively wider.

For example, if the slightly inadequate posture is maintained for too long, it means that the user has not been noticed that the tubular stem 131 of the ambient media driving unit 13 has turned orange and has been bent for a long time. In such a case, the tubular stem 131 of the ambient media driving unit 13 may gradually turn blue from the bottom, thereby inducing the user to realize how long the user has maintained a bad posture.

According to an embodiment, the ambient media system of the present invention may warn, for example, when the user fixes the posture several times during a certain time.

For example, if the ratio of the posture states changing within a predetermined time is higher than the predetermined threshold value, the posture state determination unit 12 may be configured such that the tubular stem 131 is continuously variable in its curvature, It is possible to determine the curvature level signal and the color signal so as to emit a fourth color, such as violet, which is reminiscent of injury at the time of injury such as a bruise.

For example, if a user changes from a slightly inadequate posture to a badly inadequate posture and then back to normal inadequate posture, this means that the user has been sitting too long and needs a little physical activity. In this case, the tubular stem 131 of the ambient media driving unit 13 may turn purple and shake while guiding the user to recognize that it is time to perform a body relaxing exercise.

Meanwhile, the actuator 132 of the ambient media driving unit 13 may be implemented by a motor, for example. When the wire is installed from one end of the bud to the other end of the tubular stem 131 through the inside of the tubular stem 131, the motor pulls the wire according to the curved level signal, 131 may be curved.

The light source 133 may be embodied as a plurality of LED strings provided inside the tubular stem 131.

FIG. 2 and FIG. 3 are views illustrating changes in shape and color of an ambient media device according to a sitting position of a user in an ambient media system responsive to a sitting posture according to an exemplary embodiment of the present invention.

Referring to FIG. 2, immediate feedback according to the attitude of the user is illustrated.

Scenery A on the left shows that when the user is sitting in a proper posture, the ambient media device made of sunflower flower pots naturally stands toward the sky and a green light emanating from the stem is evoked.

If the posture of the user changes slightly, the gyro acceleration sensor installed between the back and the neck senses that the body is slightly moved to the front as the inclination of the vertebrae is relaxed, and the proximity sensor installed near the monitor detects that the user's face is approaching, According to the measurement result, the user's posture state may be determined to be somewhat inappropriate. Thus, like the second scene B from the left, the stem of the ambient media device is slightly bent and the color of the stem changes from green to slightly yellow.

If the user's posture changes more heavily, the gyro acceleration sensor senses that the body is moving forward and downward as the spine is more relaxed, and the proximity sensor installed next to the monitor detects that the user's face is getting closer , And the user's posture state can be determined to be in a state of a very inappropriate posture according to the measurement result. Accordingly, as in the third scene C from the left, the stem of the ambient media device is bent more and the color of the stem changes to red.

Referring to FIG. 3, feedback according to the holding time of the posture of the user is illustrated.

In the scene D on the left, if the user keeps a bad posture, the user's posture has been determined to be somewhat improper posture for a long time. The ambient media device does not ventilate even though the wrong attitude continues. Accordingly, as shown in the left scene D, the stem of the ambient media device is bent, and the color of the stem gradually changes from blue to blue by the holding time.

In the scene E on the right side, if the user continuously changes the posture several times, the user feels discomfort due to sitting for too long, so that the stem of the ambient media device, like the right scene E, As time changes, it shakes like a dance, and the color of the stem changes to purple.

4 is a flowchart illustrating an ambient media control method in response to a sitting posture according to an embodiment of the present invention.

Referring to FIG. 4, a method of controlling ambient media using a computer includes the steps of: in a step S41, determining whether or not the computer is in a state in which a first measurement signal relating to a spinal gradient and a second measurement signal Lt; / RTI >

In step S42, the computer can determine the posture of the user based on the first and second measurement signals.

According to an embodiment, a computer may determine a user's attitude state using a state machine having one of a plurality of possible attitude states, based on a change in the first and second measured signals.

At this time, the posture states may be composed of at least two inappropriate posture states related to an inappropriate posture state of an appropriate posture and inappropriate postures differing in an appropriate degree.

According to an embodiment, on the other hand, the computer may further receive a third measurement signal that senses that the user is sitting on a chair, and thus the computer may determine the user's posture based on the first to third measurement signals .

In step S43, the computer can determine the curvature level signal and the color signal in accordance with the determined attitude state.

According to an embodiment, the computer is configured such that the curvature of the tubular stem is minimized when the user's posture is appropriate and the tubular stem is caused to emit in the first color, and the more the user's posture is relatively inadequate, The curvature level signal and the color signal can be determined such that the tube-shaped stem is further illuminated with the second color.

According to an embodiment, the computer can determine a color signal such that a flickering glow occurs from the tubular stem if the user is in an attitude state, which means that the user is relatively close to an object on the front of the user, according to the second measurement signal.

According to an embodiment, the computer may determine a curvature level signal and a color signal according to the determined attitude state and duration.

Specifically, the computer can determine the color signal such that the area of the tube-shaped stem emitting light in the third color is relatively wider as the duration of the current posture is relatively longer.

Also, according to an embodiment, the computer may determine a curvature level signal and a color signal so that the curvature of the tubular stem is continuously variable and the tubular stem emits a fourth color if the rate at which the posture states are changed within a predetermined time is greater than a predetermined threshold .

Subsequently, in step S44, the computer may provide a curvature level signal to an actuator that bends the flexible tubular stem in accordance with the curvature level signal.

Further, in step S45, the computer may provide a color signal to a light source that causes a luminous effect from the tubular stem according to the color signal.

It is to be understood that both the foregoing general description and the following detailed description of the present invention are exemplary and explanatory and are intended to provide further explanation of the invention as claimed. It will be understood that variations and specific embodiments which may occur to those skilled in the art are included within the scope of the present invention.

Further, the apparatus according to the present invention can be implemented as a computer-readable code on a computer-readable recording medium. A computer-readable recording medium includes all kinds of recording apparatuses in which data that can be read by a computer system is stored. Examples of the recording medium include ROM, RAM, optical disk, magnetic tape, floppy disk, hard disk, nonvolatile memory and the like. The computer-readable recording medium may also be distributed over a networked computer system so that computer readable code can be stored and executed in a distributed manner.

10 Ambient Media System responds to sitting position
11 posture sensor unit
111 Tilt sensor
112 proximity sensor
113 Pressure sensor
12 attitude state judgment section
13 Ambient Media Drivers
131 Tubular stem
132 Actuator
133 light source

Claims

A posture sensor unit for generating a first measurement signal related to a tilt of the spine in a user's back and a second measurement signal related to a proximity distance to an object in front of the user;
A posture state determining unit that determines a posture state of the user based on the first and second measurement signals, and determines a curved level signal and a color signal according to the determined posture state; And
And an ambient media driver including an actuator and a light source to emit light from the tubular stem according to the color signal so that the flexible tubular stem is curved according to the curvature level signal.

2. The apparatus according to claim 1, wherein the posture-
And a state machine for determining a posture state of the user as one of a plurality of possible posture states based on the change of the first and second measurement signals.

The ambient media system of claim 2, wherein the attitude states comprise a first attitude state indicating that the user's attitude is appropriate and a second attitude state indicating that the attitude of the user is improper.

The posture estimation device according to claim 1,
The tubular stem is relatively less curved and the tubular stem is caused to emit in the first color when the posture state is an attitude state which means that the user's posture is appropriate, Wherein said tubular stem is operative to determine a curvature level signal and a hue signal such that the curvature of said tubular stem becomes relatively severe and said tubular stem emits a second hue in the case of an inadequate posture, Media system.

5. The apparatus according to claim 4, wherein the attitude-state determining unit determines the color signal so that a flashing light emission effect occurs from the tubular stem if the user is in an attitude state, which means that the user is relatively close to an object on the user front, Wherein the operation of the ambient media system is performed by the media system.

The apparatus according to claim 1, wherein the attitude-state determining unit is operative to determine a user's attitude state based on the first and second measured signals, and to determine a curvature level signal and a hue signal according to the determined attitude state and duration time Which is an ambient media system.

[7] The ambience media system of claim 6, wherein the attitude determination unit is operative to determine a hue signal such that the area of the tubular trunk that emits light in a third color is relatively wider as the duration of the current attitude state is relatively longer. .

[Claim 7] The method according to claim 6, wherein the posture state determination unit determines that the posture of the tubular stem is continuously variable when the ratio of the posture states changing within a predetermined time is higher than a predetermined threshold value, And to determine a color signal.

2. The apparatus of claim 1, wherein the posture sensor portion is operative to further generate a third measurement signal for sensing that the user is sitting on a chair,
Wherein the posture state determination unit determines the posture state of the user based on the first to third measurement signals, and determines the curvature level signal and the color signal according to the determined posture state.

[2] The actuator of claim 1, wherein the actuator of the ambient media driving unit comprises a wire fixed to one end of the tubular stem and extending to the other end of the tubular stem through the inside of the tubular stem, Wherein the tubular stem is curved. &Lt; RTI ID = 0.0 > 16. < / RTI >

A method of controlling ambient media using a computer,
The computer comprising:
Receiving a first measurement signal relating to a vertebral tilt in a user's back and a second measurement signal relating to a proximity to an object in a user front;
Determining a posture of the user based on the first and second measurement signals;
Determining a curvature level signal and a color signal according to the determined attitude state;
Providing the curvature level signal to an actuator that bends the flexible tubular stem according to the curvature level signal; And
And providing the color signal to a light source causing a luminous effect from the tubular stem according to the color signal.

12. The method of claim 11, wherein determining the posture of the user comprises:
Determining an attitude state of the user using a state machine having one of a plurality of possible attitude states based on a change in the first and second measured signals, Way.

[12] The ambient media control method of claim 12, wherein the posture states include a first posture state indicating that the user's posture is appropriate and a second posture state indicating that the posture of the user is inappropriate.

12. The method of claim 11, wherein determining the curvature level signal and the color signal comprises:
The tubular stem is relatively less curved and the tubular stem is caused to emit in the first color when the posture state is an attitude state which means that the user's posture is appropriate, And determining the curvature level signal and the hue signal so that the curvature of the tubular stem becomes relatively severe and the tubular stem emits a second hue in the case of an inadequate posture. Lt; / RTI > media control method.

15. The method of claim 14, wherein determining the curvature level signal and the hue signal comprises:
And determining the color signal so that a flickering light emission effect occurs from the tubular stem if the user is in an attitude state which means that the user is relatively close to an object in front of the user according to the second measurement signal Media control method.

12. The method of claim 11, wherein determining the curvature level signal and the color signal comprises:
And determining a curvature level signal and a hue signal according to the determined attitude state and duration time.

17. The method of claim 16, wherein determining the curvature level signal and the hue signal comprises:
And determining a color signal such that an area of the tubular trunk emitting light in a third color is relatively wider as the duration of the current posture state is relatively longer.

17. The method of claim 16, wherein determining the curvature level signal and the hue signal comprises:
Determining the curvature level signal and the hue signal such that the curvature of the tubular stem is continuously variable and the tubular stem emits a fourth hue if the rate at which the posture states change within a predetermined time is greater than a predetermined threshold value Wherein the method comprises the steps of:

12. The method of claim 11, further comprising the step of the computer receiving a third measurement signal to sense that the user is sitting on a chair,
The step of determining the posture state of the user includes:
And determining a user's attitude based on the first to third measured signals.

A computer program recorded on a computer-readable recording medium, the computer program being embodied in a computer to implement the steps of the ambient media control method according to any one of claims 11 to 19.