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WO2019185280A1 - A display system with efficient energy consumption - Google Patents

A display system with efficient energy consumption Download PDF

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Publication number
WO2019185280A1
WO2019185280A1 PCT/EP2019/054969 EP2019054969W WO2019185280A1 WO 2019185280 A1 WO2019185280 A1 WO 2019185280A1 EP 2019054969 W EP2019054969 W EP 2019054969W WO 2019185280 A1 WO2019185280 A1 WO 2019185280A1
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WO
WIPO (PCT)
Prior art keywords
infrared
sleep mode
signal
display system
enabling
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/EP2019/054969
Other languages
French (fr)
Inventor
Omer ALTUNAY
Tevfik Orkun
Mumun AKSAKAL
Birkan DEMIRCAN
Metin DUMAN
Mustafa DENIZ
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Arcelik AS
Original Assignee
Arcelik AS
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Arcelik AS filed Critical Arcelik AS
Publication of WO2019185280A1 publication Critical patent/WO2019185280A1/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
    • G06F1/26—Power supply means, e.g. regulation thereof
    • G06F1/32—Means for saving power
    • G06F1/3203—Power management, i.e. event-based initiation of a power-saving mode
    • G06F1/3206—Monitoring of events, devices or parameters that trigger a change in power modality
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
    • G06F1/26—Power supply means, e.g. regulation thereof
    • G06F1/32—Means for saving power
    • G06F1/3203—Power management, i.e. event-based initiation of a power-saving mode
    • G06F1/3234—Power saving characterised by the action undertaken
    • G06F1/325—Power saving in peripheral device
    • G06F1/3265—Power saving in display device
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D10/00—Energy efficient computing, e.g. low power processors, power management or thermal management

Definitions

  • the present invention relates to a method enabling energy saving by automatically switching into sleep mode in interactive display systems.
  • the present invention relates to a method in which the determination of the operational state of the device is regulated by active usage monitoring through infrared data communication.
  • a smart board is a wide screen connected to a computer and a projection device.
  • the desktop of the computer is reflected on the surface of the board, enabling users to interact with the visual content on the screen by touching, and an object moving on the reflected visual content is controlled by a user interfering the infrared light on the surface.
  • the infrared light curtain emitted parallel to the projection screen is reflected by an object such as a stylus pen, this is detected and the position of the related motion is calculated.
  • the touch screen may be a capacitive or resistive touch screen having a pattern formed by electrodes made of a conductive material.
  • Smart boards operate as part of a system comprising in general a computer, a projector and a white board software.
  • the components are connected wirelessly or by USB or serial cables.
  • a projector connected to a computer displays the desktop on the interactive white board.
  • the white board accepts touch input from fingers, pens and other solid objects.
  • smart board technology advances new models became capable of displaying UHD graphics or they may be embodied as flat panels capable of reflecting per se without requiring a projector. Since smart boards are interactive devices, detection of idle moments may be employed in order to save energy. Therefore, some models are equipped with motion sensors as well. Energy can be saved by switching the smart board into sleep mode when said sensor does not detect a motion. High price of motion sensors restrict their utilization.
  • US8023262 discloses a method comprising the step of activating the sleep mode of a device upon obstructing the light of a sensor disposed on a screen during operation.
  • EP2316219 describes an electronic device comprising a control module enabling initiating a process based on data received from a movable sensor.
  • the aim of the present invention is to realize a method providing energy saving by automatically activating sleep mode in idle state by detecting active use by means of data received from infrared sensors in interactive display systems.
  • the display device realized to achieve the aim of the present invention and disclosed in the first claim and the dependent claims, comprises a control unit controlling the operational functions, at least one screen adapted to reflect image content data, an infrared receiver adapted to receive infrared data and an infrared transmitter enabling infrared data transmission.
  • the infrared receiver-transmitter system utilizes Light Emitting Diode, i.e. LED technology currently used very commonly. In simple terms, LED is a semi-conductive circuit component converting electrical energy to electromagnetic energy, i.e. to light, and the emitted electromagnetic wave frequency may correspond to visible or invisible light spectrum.
  • a LED is provided in the transmitter circuit, emitting electromagnetic waves in a given frequency, and a component is provided in the receiver, detecting these waves and as the result of its detection controlling in turn a simple relay circuit connected thereto by giving a binary output such as 1 or 0.
  • the infrared receiver is adapted to receive the signal frequency emitted by the infrared transmitter. Infrared communication is thus enabled in the display system.
  • the display device of the invention comprises a control unit enabling shifting the device into sleep mode upon being triggered by the infrared receiver receiving a sleep mode signal which is generated by the infrared transmitter enabling continuous infrared signal emission in operating state, if a reflection surface adapted to reflect infrared signals is moved closer to a signal source and the sleep mode signal emitted from the infrared transmitter is reflected off the reflection surface and sent to the infrared receiver.
  • the material of the infrared reflection surface should comprise free electrons in order to reflect light beams. Certain thin film materials with free electrons may be used and oxides such as indium tin oxide (ITO), or zinc oxide (ZnO) may be preferred as they have valence electron.
  • a surface may be formed by using such oxides on glass coatings.
  • the reflection surface is provided on the rear surface of an object with a size large enough to obstruct viewing images by covering a major portion of the screen, and is designed sized and positioned so as to receive the beams from the infrared transmitter and to reflect them to the infrared receiver.
  • the object to which the reflection surface is applied or integrated has a front surface on the viewing direction of the screen, large enough to obstruct the screen. This object may be a white board or a lid. Sleep mode of the system is activated in a state in which watching of the screen is obstructed, providing energy saving.
  • the rear surface of a second screen adapted to be placed in front of the main screen is used as the reflection surface in the display system.
  • the reflection surface of the object in direction of the main screen is made of a material adapted to reflect infrared light.
  • the infrared receiver and the transmitter may be enabled to be positioned on a larger area and on varying positions on the screen.
  • the display system comprises a body on which a screen and the displaying components are disposed, and an infrared receiver and an infrared transmitter positioned side-by-side on the body.
  • the infrared receiver and the infrared transmitter may be positioned on a panel on the rear portion or in front of the screen.
  • the reflection surface provided on the obstruction can not reflect the infrared beam coming with a wide angle due to the reflection surface having a small size and the obstruction in front of the screen being disposed close to the screen. Therefore, the infrared receiver and the infrared transmitter are positioned close, preferably adjacent to each other, enabling the corresponding reflection surface to transfer signals. The sleep mode signal reception efficiency of the infrared receiver is thus enhanced.
  • the display system comprises a control unit enabling determining the reflection duration of a signal reflected from the infrared transmitter by means of a timer, and shifting the device into sleep mode upon determining the signal reflection duration received from the timer being longer than a predetermined limit value.
  • the timer is in an active state communicating with the control unit throughout the period in which the display system is active or in sleep mode. The timer continues time monitoring while the sleep mode signal is reaching the infrared receiver.
  • the limit value predetermined for the timer is defined such that the command to shift the display system into sleep mode is executed only when the screen is subjected to an obstruction for a given time, so that the sleep mode is not activated when an obstruction covers the screen inadvertently or for a short time.
  • the limit value is preferably determined in the range of 3 to 15 minutes. Energy is thus used efficiently.
  • the display device comprises a control unit enabling deactivating the sleep mode and resuming normal operating functions if reception of a sleep mode signal by the infrared receiver is halted while the device in sleep mode.
  • the infrared receiver and the infrared transmitter continue functioning during the display system is in the sleep mode.
  • the timer triggered by receiving the signal is stopped and reset upon the signal being cut-off.
  • the control unit activates upon stopping of the timer, enabling turning the display system on.
  • the sleep mode activation of the display system is thus automatized, providing ease of use.
  • the display system is a video wall system.
  • the video wall term implies generating a single multiscreen image by means of a plurality of display devices, from a combined image transmitted from a single video inlet.
  • Video walls may generally have 1x4, 2x2, 3x3, 4x4 or much larger screen arrangements.
  • video wall applications are preferred for being able to obtain a larger screen area by changing their arrangement and a higher pixel intensity per unit cost, and they provide advantage due to production costs of single screens and enable achieving an extraordinary resolution when they are thus combined.
  • Video wall systems may be preferred in settings with many spectators such as a lecture hall.
  • a control unit In order to be able to use the devices in a video wall system as a single wide screen, all of them are commonly controlled by a control unit. Operation of the entire video wall system may be regulated by means of an infrared receiver and an infrared transmitter communicating with the control unit. Ease of use is thus provided.
  • the display system is a smart board.
  • Smart boards are arranged as systems generally having a computer fulfilling the function of a control unit, a projection device and a surface acting as a screen, to which an image is reflected from the projection device. Surfaces exposed by sliding a writing board provided in most classrooms are used as the image reflection surface of smart boards. Once utilization ends, the writing board is resumed in previous position to continue a lecture. In this case, it is difficult to access computer controls or controls of the projection device in order to activate the sleep mode of the smart board system. Automatic sleep mode activation of the smart board screen and therefore the smart board system is enabled by automatically detecting an obstruction by means of the reflection surface disposed on the rear surface of a writing board. Ease of use and energy saving is thus provided.
  • a method is executed for the display system comprising an infrared transmitter enabling continuous signal transmission upon a command by a control unit, and a reflection surface adapted to reflect and thus send this signal to an infrared receiver provided on the system, said method comprises the steps of enabling the infrared transmitter of the control unit to transmit a continuous signal in a frequency defined to command the infrared receiver to trigger activation of the sleep mode of the display system, directing this signal to the infrared receiver upon the reflection surface being brought to a position to encounter the signal emitted by the infrared transmitter, and enabling activation of the sleep mode of the display system.
  • electric energy consumption is improved and ease of use is provided.
  • a display system is realized by means of the invention, in which automatic sleep mode activation is regulated by means of infrared data transfer upon an obstruction being brought over an interactive screen image, and enabling efficiently use of energy.
  • the operational functions of the display system are controlled by the control unit.
  • At least one screen or an entirety of screens are provided, adapted to reflect the image or video content desired to be displayed.
  • An infrared receiver adapted to receive infrared data is provided in front of or behind the screen. In case when the infrared receiver is positioned behind the screen, the screen should be adapted to permeate infrared beams therethrough.
  • An infrared transmitter adapted for infrared communication is provided on or behind the screen, preferably proximate to the infrared receiver.
  • the control unit controls beam generation or emission of the infrared transmitter.
  • the display system is thus enabled data transmission with its infrared equipment.
  • the display system of the invention comprises a control unit enabling shifting the device into sleep mode upon being triggered by the infrared receiver receiving a sleep mode signal which is generated by the infrared transmitter enabling continuous infrared signal emission in operating state, if a reflection surface adapted to reflect infrared signals is moved closer to a signal source and the sleep mode signal emitted from the infrared transmitter is reflected off the reflection surface and sent to the infrared receiver.
  • the display system is able to perform its operational functions by being powered by a power unit to which it is connected.
  • the display system has two operating settings when it is connected to an active power supply.
  • the active mode in which all operational functions of the system are active, broadcast and/or image is displayed to the screen, and the control unit controls the operation.
  • Another operating setting is the sleep mode of the device. In sleep mode, no image is reflected on the screen and the control unit halts the operational functions.
  • the infrared receiver and the infrared transmitter may be enabled to continue functioning when the device is in the sleep mode. The difference between this mode and the state in which the system is completely turned off is that upon triggering, the display system controls can resume their operation with their active mode settings.
  • the infrared transmitter continuously emits a sleep mode signal generated according to a command of the control unit, in a frequency detectable by the infrared receiver.
  • a reflection surface adapted to reflect infrared signals In case a reflection surface adapted to reflect infrared signals, is moved closer to the source of the sleep mode signal, said sleep mode signal can be reflected off the reflection surface.
  • the infrared receiver positioned so as to detect the reflected sleep mode signal, detects the signal, and triggers the system to shift into sleep mode. By this, whether the screen content is being watched is determined in case an obstruction comes in front of the screen, reducing energy consumption due to active mode operation.
  • the display system comprises a body on which a screen is disposed, and an infrared receiver and an infrared transmitter positioned side-by-side on the body.
  • the reflection surface By side-by-side positioning of the infrared receiver and the infrared transmitter, the reflection surface being brought to a corresponding position, can feed the beam from the infrared transmitter directly to the infrared receiver.
  • the display system is enabled to be shifted into sleep mode as the reflection surface disposed on the obstruction brought before the screen can be detected effectively.
  • the display system comprises a timer.
  • the timer measures the reception duration by the infrared receiver of the sleep mode signal reflected from the infrared transmitter.
  • the control unit controls the functions of the infrared receiver.
  • the control unit activates the timer upon the infrared receiver detecting the sleep mode signal and transmitting this information to the control unit.
  • the control unit does not execute any process if the sleep mode signal reception is halted before the data from the timer reaches a predetermined limit value.
  • the control unit activates the sleep mode for the display system if it determines that the sleep mode signal is received for a duration longer than the predetermined duration by comparing the data from the timer with the predetermined limit value.
  • the display device comprises a control unit enabling deactivating the sleep mode and resuming normal operating functions if reception of a sleep mode signal by the infrared receiver is halted while the device in sleep mode.
  • the timer continues operating while the display system is in sleep mode.
  • the infrared receiver and the infrared transmitter continue functioning in the sleep mode.
  • no sleep mode signal reaches the infrared receiver.
  • the timer triggered once signal is received is also stopped and is reset upon the signal being cut-off.
  • the control unit activates upon stopping of the timer, enabling turning the display system on.
  • the device is shifted into sleep mode throughout the period in which the screen is obstructed, and ease of use and energy saving is provided by automatically resuming normal operation upon removal of the obstruction.
  • the display system is a video wall system.
  • Video wall systems are wide screen solutions formed by combining in a certain arrangement a plurality of display devices capable of reflecting broadcasts, in which a main image is shared on all device screens by being divided into segments and the entire image is reflected on the whole surface formed by combination of the screens. Surfaces such as individual writing boards which may be disposed in front of such systems, are often used together with these systems particularly in educational applications.
  • the system is enabled to automatically turn on and shift into sleep mode by providing a reflection surface on the surface brought in front of a screen in such cases, in order to reflect the signal from the infrared transmitter, thereby providing energy saving and ease of use by automatically turning the screens on and off depending on usage state.
  • the display system is a smart board.
  • Smart boards are usually used for educational purposes in schools, and are designed so as to cover a screen surface on which images are displayed by a cover or a writing board in order to occupy less space and to protect the interactive surfaces.
  • the system is enabled to automatically turn on and shift into sleep mode by providing a reflection surface on cover or writing board to be brought in front of the screen, in order to reflect the signal from the infrared transmitter, thereby providing energy saving and ease of use by automatically turning the screens on and off depending on usage state.
  • a method is executed for the display system comprising an infrared transmitter enabling continuous signal transmission upon a command by a control unit, and a reflection surface adapted to reflect and thus send this signal to an infrared receiver provided on the system, said method comprises the steps of enabling the infrared transmitter of the control unit to transmit a continuous signal in a frequency defined to command the infrared receiver to trigger activation of the sleep mode of the display system, directing this signal to the infrared receiver upon the reflection surface being brought to a position to encounter the signal emitted by the infrared transmitter, and enabling activation of the sleep mode of the display system.
  • sleep mode is activated by determining the periods in which the display system is not actively used, reducing energy consumption.
  • a display system in which automatic sleep mode activation is regulated by using infrared data transfer upon determining the conditions in which screen image is obstructed, and in which efficiently use of energy is enabled.

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  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Controls And Circuits For Display Device (AREA)
  • Position Input By Displaying (AREA)

Abstract

The present invention relates to a display systenn comprising a control unit enabling the systenn to shift to sleep mode by sending a sleep mode signal generated during operating state by an infrared transmitter enabling continuous infrared signal emission, to an infrared receiver through a reflection surface.

Description

A DISPLAY SYSTEM WITH EFFICIENT ENERGY CONSUMPTION
The present invention relates to a method enabling energy saving by automatically switching into sleep mode in interactive display systems. In particular, the present invention relates to a method in which the determination of the operational state of the device is regulated by active usage monitoring through infrared data communication.
Nowadays usage of interactive display systems is getting increasingly more common. One of such systems is smart boards which are used to a higher extent for educational purposes in schools and in work places. A smart board is a wide screen connected to a computer and a projection device. The desktop of the computer is reflected on the surface of the board, enabling users to interact with the visual content on the screen by touching, and an object moving on the reflected visual content is controlled by a user interfering the infrared light on the surface. When the infrared light curtain emitted parallel to the projection screen is reflected by an object such as a stylus pen, this is detected and the position of the related motion is calculated.
Alternatively, a glass layer with four terminal connections on corners is provided on the smart board, having a conductive film such as indium tin oxide. In this case, the touch screen may be a capacitive or resistive touch screen having a pattern formed by electrodes made of a conductive material.
Smart boards operate as part of a system comprising in general a computer, a projector and a white board software. The components are connected wirelessly or by USB or serial cables. In certain models, a projector connected to a computer displays the desktop on the interactive white board. The white board accepts touch input from fingers, pens and other solid objects. As smart board technology advances, new models became capable of displaying UHD graphics or they may be embodied as flat panels capable of reflecting per se without requiring a projector. Since smart boards are interactive devices, detection of idle moments may be employed in order to save energy. Therefore, some models are equipped with motion sensors as well. Energy can be saved by switching the smart board into sleep mode when said sensor does not detect a motion. High price of motion sensors restrict their utilization.
State of the art United States patent document no. US8023262 discloses a method comprising the step of activating the sleep mode of a device upon obstructing the light of a sensor disposed on a screen during operation.
State of the art European patent document no EP2316219  describes an electronic device comprising a control module enabling initiating a process based on data received from a movable sensor.
The aim of the present invention is to realize a method providing energy saving by automatically activating sleep mode in idle state by detecting active use by means of data received from infrared sensors in interactive display systems.
The display device realized to achieve the aim of the present invention and disclosed in the first claim and the dependent claims, comprises a control unit controlling the operational functions, at least one screen adapted to reflect image content data, an infrared receiver adapted to receive infrared data and an infrared transmitter enabling infrared data transmission. The infrared receiver-transmitter system utilizes Light Emitting Diode, i.e. LED technology currently used very commonly. In simple terms, LED is a semi-conductive circuit component converting electrical energy to electromagnetic energy, i.e. to light, and the emitted electromagnetic wave frequency may correspond to visible or invisible light spectrum. A LED is provided in the transmitter circuit, emitting electromagnetic waves in a given frequency, and a component is provided in the receiver, detecting these waves and as the result of its detection controlling in turn a simple relay circuit connected thereto by giving a binary output such as 1 or 0. The infrared receiver is adapted to receive the signal frequency emitted by the infrared transmitter. Infrared communication is thus enabled in the display system.
The display device of the invention comprises a control unit enabling shifting the device into sleep mode upon being triggered by the infrared receiver receiving a sleep mode signal which is generated by the infrared transmitter enabling continuous infrared signal emission in operating state, if a reflection surface adapted to reflect infrared signals is moved closer to a signal source and the sleep mode signal emitted from the infrared transmitter is reflected off the reflection surface and sent to the infrared receiver. The material of the infrared reflection surface should comprise free electrons in order to reflect light beams. Certain thin film materials with free electrons may be used and oxides such as indium tin oxide (ITO), or zinc oxide (ZnO) may be preferred as they have valence electron. A surface may be formed by using such oxides on glass coatings. The reflection surface is provided on the rear surface of an object with a size large enough to obstruct viewing images by covering a major portion of the screen, and is designed sized and positioned so as to receive the beams from the infrared transmitter and to reflect them to the infrared receiver. The object to which the reflection surface is applied or integrated, has a front surface on the viewing direction of the screen, large enough to obstruct the screen. This object may be a white board or a lid. Sleep mode of the system is activated in a state in which watching of the screen is obstructed, providing energy saving.
In an embodiment of the invention, the rear surface of a second screen adapted to be placed in front of the main screen, is used as the reflection surface in the display system. The reflection surface of the object in direction of the main screen is made of a material adapted to reflect infrared light. By this, the infrared receiver and the transmitter may be enabled to be positioned on a larger area and on varying positions on the screen.
In an embodiment of the invention, the display system comprises a body on which a screen and the displaying components are disposed, and an infrared receiver and an infrared transmitter positioned side-by-side on the body. The infrared receiver and the infrared transmitter may be positioned on a panel on the rear portion or in front of the screen. The reflection surface provided on the obstruction can not reflect the infrared beam coming with a wide angle due to the reflection surface having a small size and the obstruction in front of the screen being disposed close to the screen. Therefore, the infrared receiver and the infrared transmitter are positioned close, preferably adjacent to each other, enabling the corresponding reflection surface to transfer signals. The sleep mode signal reception efficiency of the infrared receiver is thus enhanced.
In an embodiment of the invention, the display system comprises a control unit enabling determining the reflection duration of a signal reflected from the infrared transmitter by means of a timer, and shifting the device into sleep mode upon determining the signal reflection duration received from the timer being longer than a predetermined limit value. The timer is in an active state communicating with the control unit throughout the period in which the display system is active or in sleep mode. The timer continues time monitoring while the sleep mode signal is reaching the infrared receiver. The limit value predetermined for the timer is defined such that the command to shift the display system into sleep mode is executed only when the screen is subjected to an obstruction for a given time, so that the sleep mode is not activated when an obstruction covers the screen inadvertently or for a short time. The limit value is preferably determined in the range of 3 to 15 minutes. Energy is thus used efficiently.
In an embodiment of the invention, the display device comprises a control unit enabling deactivating the sleep mode and resuming normal operating functions if reception of a sleep mode signal by the infrared receiver is halted while the device in sleep mode. The infrared receiver and the infrared transmitter continue functioning during the display system is in the sleep mode. The timer triggered by receiving the signal is stopped and reset upon the signal being cut-off. The control unit activates upon stopping of the timer, enabling turning the display system on. The sleep mode activation of the display system is thus automatized, providing ease of use.
In an embodiment of the invention, the display system is a video wall system. In general, the video wall term implies generating a single multiscreen image by means of a plurality of display devices, from a combined image transmitted from a single video inlet. Video walls may generally have 1x4, 2x2, 3x3, 4x4 or much larger screen arrangements. Essentially, video wall applications are preferred for being able to obtain a larger screen area by changing their arrangement and a higher pixel intensity per unit cost, and they provide advantage due to production costs of single screens and enable achieving an extraordinary resolution when they are thus combined. Video wall systems may be preferred in settings with many spectators such as a lecture hall. In order to be able to use the devices in a video wall system as a single wide screen, all of them are commonly controlled by a control unit. Operation of the entire video wall system may be regulated by means of an infrared receiver and an infrared transmitter communicating with the control unit. Ease of use is thus provided.
In an embodiment of the invention, the display system is a smart board. Smart boards are arranged as systems generally having a computer fulfilling the function of a control unit, a projection device and a surface acting as a screen, to which an image is reflected from the projection device. Surfaces exposed by sliding a writing board provided in most classrooms are used as the image reflection surface of smart boards. Once utilization ends, the writing board is resumed in previous position to continue a lecture. In this case, it is difficult to access computer controls or controls of the projection device in order to activate the sleep mode of the smart board system. Automatic sleep mode activation of the smart board screen and therefore the smart board system is enabled by automatically detecting an obstruction by means of the reflection surface disposed on the rear surface of a writing board. Ease of use and energy saving is thus provided.
In an embodiment of the invention, a method is executed for the display system comprising an infrared transmitter enabling continuous signal transmission upon a command by a control unit, and a reflection surface adapted to reflect and thus send this signal to an infrared receiver provided on the system, said method comprises the steps of enabling the infrared transmitter of the control unit to transmit a continuous signal in a frequency defined to command the infrared receiver to trigger activation of the sleep mode of the display system, directing this signal to the infrared receiver upon the reflection surface being brought to a position to encounter the signal emitted by the infrared transmitter, and enabling activation of the sleep mode of the display system. By this, electric energy consumption is improved and ease of use is provided.
A display system is realized by means of the invention, in which automatic sleep mode activation is regulated by means of infrared data transfer upon an obstruction being brought over an interactive screen image, and enabling efficiently use of energy.
The operational functions of the display system are controlled by the control unit. At least one screen or an entirety of screens are provided, adapted to reflect the image or video content desired to be displayed. An infrared receiver adapted to receive infrared data is provided in front of or behind the screen. In case when the infrared receiver is positioned behind the screen, the screen should be adapted to permeate infrared beams therethrough. An infrared transmitter adapted for infrared communication is provided on or behind the screen, preferably proximate to the infrared receiver. The control unit controls beam generation or emission of the infrared transmitter. The display system is thus enabled data transmission with its infrared equipment.
The display system of the invention comprises a control unit enabling shifting the device into sleep mode upon being triggered by the infrared receiver receiving a sleep mode signal which is generated by the infrared transmitter enabling continuous infrared signal emission in operating state, if a reflection surface adapted to reflect infrared signals is moved closer to a signal source and the sleep mode signal emitted from the infrared transmitter is reflected off the reflection surface and sent to the infrared receiver. The display system is able to perform its operational functions by being powered by a power unit to which it is connected. The display system has two operating settings when it is connected to an active power supply. One of these is the active mode in which all operational functions of the system are active, broadcast and/or image is displayed to the screen, and the control unit controls the operation. Another operating setting is the sleep mode of the device. In sleep mode, no image is reflected on the screen and the control unit halts the operational functions. The infrared receiver and the infrared transmitter may be enabled to continue functioning when the device is in the sleep mode. The difference between this mode and the state in which the system is completely turned off is that upon triggering, the display system controls can resume their operation with their active mode settings. When the display system is in active mode, the infrared transmitter continuously emits a sleep mode signal generated according to a command of the control unit, in a frequency detectable by the infrared receiver. In case a reflection surface adapted to reflect infrared signals, is moved closer to the source of the sleep mode signal, said sleep mode signal can be reflected off the reflection surface. The infrared receiver positioned so as to detect the reflected sleep mode signal, detects the signal, and triggers the system to shift into sleep mode. By this, whether the screen content is being watched is determined in case an obstruction comes in front of the screen, reducing energy consumption due to active mode operation.
In an embodiment of the invention, the display system comprises a body on which a screen is disposed, and an infrared receiver and an infrared transmitter positioned side-by-side on the body. By side-by-side positioning of the infrared receiver and the infrared transmitter, the reflection surface being brought to a corresponding position, can feed the beam from the infrared transmitter directly to the infrared receiver. By this, the display system is enabled to be shifted into sleep mode as the reflection surface disposed on the obstruction brought before the screen can be detected effectively.
In an embodiment of the invention, the display system comprises a timer. The timer measures the reception duration by the infrared receiver of the sleep mode signal reflected from the infrared transmitter. The control unit controls the functions of the infrared receiver. The control unit activates the timer upon the infrared receiver detecting the sleep mode signal and transmitting this information to the control unit. The control unit does not execute any process if the sleep mode signal reception is halted before the data from the timer reaches a predetermined limit value. The control unit activates the sleep mode for the display system if it determines that the sleep mode signal is received for a duration longer than the predetermined duration by comparing the data from the timer with the predetermined limit value. By this, in cases when the screen image is obstructed for short periods, the system is avoided from being shifted into sleep mode and the obligation of restarting the system is thus averted.
In an embodiment of the invention, the display device comprises a control unit enabling deactivating the sleep mode and resuming normal operating functions if reception of a sleep mode signal by the infrared receiver is halted while the device in sleep mode. The timer continues operating while the display system is in sleep mode. The infrared receiver and the infrared transmitter continue functioning in the sleep mode. When the reflection surface enabling directing the sleep mode signal from the infrared transmitter to be directed onto the infrared receiver, is removed, no sleep mode signal reaches the infrared receiver. The timer triggered once signal is received is also stopped and is reset upon the signal being cut-off. The control unit activates upon stopping of the timer, enabling turning the display system on. Thus, the device is shifted into sleep mode throughout the period in which the screen is obstructed, and ease of use and energy saving is provided by automatically resuming normal operation upon removal of the obstruction.
In an embodiment of the invention, the display system is a video wall system. Video wall systems are wide screen solutions formed by combining in a certain arrangement a plurality of display devices capable of reflecting broadcasts, in which a main image is shared on all device screens by being divided into segments and the entire image is reflected on the whole surface formed by combination of the screens. Surfaces such as individual writing boards which may be disposed in front of such systems, are often used together with these systems particularly in educational applications. The system is enabled to automatically turn on and shift into sleep mode by providing a reflection surface on the surface brought in front of a screen in such cases, in order to reflect the signal from the infrared transmitter, thereby providing energy saving and ease of use by automatically turning the screens on and off depending on usage state.
In an embodiment of the invention, the display system is a smart board. Smart boards are usually used for educational purposes in schools, and are designed so as to cover a screen surface on which images are displayed by a cover or a writing board in order to occupy less space and to protect the interactive surfaces. The system is enabled to automatically turn on and shift into sleep mode by providing a reflection surface on cover or writing board to be brought in front of the screen, in order to reflect the signal from the infrared transmitter, thereby providing energy saving and ease of use by automatically turning the screens on and off depending on usage state.
In an embodiment of the invention, a method is executed for the display system comprising an infrared transmitter enabling continuous signal transmission upon a command by a control unit, and a reflection surface adapted to reflect and thus send this signal to an infrared receiver provided on the system, said method comprises the steps of enabling the infrared transmitter of the control unit to transmit a continuous signal in a frequency defined to command the infrared receiver to trigger activation of the sleep mode of the display system, directing this signal to the infrared receiver upon the reflection surface being brought to a position to encounter the signal emitted by the infrared transmitter, and enabling activation of the sleep mode of the display system. By this, sleep mode is activated by determining the periods in which the display system is not actively used, reducing energy consumption.
By means of the invention, a display system is realized, in which automatic sleep mode activation is regulated by using infrared data transfer upon determining the conditions in which screen image is obstructed, and in which efficiently use of energy is enabled.

Claims (8)

  1. A display system comprising a control unit controlling the operational functions, at least one screen adapted to reflect image content data, an infrared receiver adapted to receive infrared data and an infrared transmitter enabling infrared data transmission,
    characterized by the control unit enabling shifting the device into sleep mode upon being triggered by the infrared receiver receiving a sleep mode signal which is generated by the infrared transmitter enabling continuous infrared signal emission in operating state, if a reflection surface adapted to reflect infrared signals is moved closer to a signal source and the sleep mode signal emitted from the infrared transmitter is reflected off the reflection surface and sent to the infrared receiver.
  2. A display device according to claim 1, characterized by a second screen adapted to be placed in front of the screen, whose rear surface is used as the reflection surface.
  3. A display device according to claim 1 or 2, characterized by a body on which the screen is positioned, an infrared receiver and an infrared transmitter positioned side-by-side on the body.
  4. A display system according to any one of the preceding claims, characterized by the control unit enabling determining the reflection duration of a signal reflected from the infrared transmitter by means of a timer, and shifting the device into sleep mode upon determining the signal reflection duration received from the timer being longer than a predetermined limit value.
  5. A display system according to claim 4, characterized by the control unit enabling deactivating the sleep mode and resuming normal operating functions if reception of a sleep mode signal by the infrared receiver is halted while the device in sleep mode.
  6. A display system according to any one of the preceding claims which is a video wall.
  7. A display system according to any one of the preceding claims which is a smart board.
  8. A method for a display system comprising an infrared transmitter enabling continuous signal transmission upon a command by a control unit, and a reflection surface adapted to reflect and thus send this signal to an infrared receiver provided on the system, comprising the steps of enabling the infrared transmitter of the control unit to transmit a continuous signal in a frequency defined to command the infrared receiver to trigger activation of the sleep mode of the display system, directing this signal to the infrared receiver upon the reflection surface being brought to a position to encounter the signal emitted by the infrared transmitter, and enabling activation of the sleep mode of the display system.
PCT/EP2019/054969 2018-03-30 2019-02-28 A display system with efficient energy consumption Ceased WO2019185280A1 (en)

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TRA2018/04516 2018-03-30
TR201804516 2018-03-30

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2316219A1 (en) 2008-08-28 2011-05-04 Eastman Kodak Company Detection of open scanner lid
US8023262B2 (en) 2004-08-25 2011-09-20 Apple Inc. Lid-closed detector
EP2600218A1 (en) * 2011-11-29 2013-06-05 Huawei Device Co., Ltd. Method for controlling screen state of mobile device and related mobile device

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8023262B2 (en) 2004-08-25 2011-09-20 Apple Inc. Lid-closed detector
EP2316219A1 (en) 2008-08-28 2011-05-04 Eastman Kodak Company Detection of open scanner lid
EP2600218A1 (en) * 2011-11-29 2013-06-05 Huawei Device Co., Ltd. Method for controlling screen state of mobile device and related mobile device

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