EP1305697A2 - Bildanzeigesystem und fernsteuerungs-vorrichtung für ein solches system - Google Patents

Bildanzeigesystem und fernsteuerungs-vorrichtung für ein solches system

Info

Publication number
EP1305697A2
EP1305697A2 EP01967132A EP01967132A EP1305697A2 EP 1305697 A2 EP1305697 A2 EP 1305697A2 EP 01967132 A EP01967132 A EP 01967132A EP 01967132 A EP01967132 A EP 01967132A EP 1305697 A2 EP1305697 A2 EP 1305697A2
Authority
EP
European Patent Office
Prior art keywords
control unit
remote control
light
detector
output signal
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.)
Withdrawn
Application number
EP01967132A
Other languages
English (en)
French (fr)
Inventor
Kyle Hor
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.)
Koninklijke Philips NV
Original Assignee
Koninklijke Philips Electronics NV
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 Koninklijke Philips Electronics NV filed Critical Koninklijke Philips Electronics NV
Publication of EP1305697A2 publication Critical patent/EP1305697A2/de
Withdrawn legal-status Critical Current

Links

Classifications

    • 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]
    • H04N21/42204—User interfaces specially adapted for controlling a client device through a remote control device; Remote control devices therefor
    • 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]
    • H04N21/42204—User interfaces specially adapted for controlling a client device through a remote control device; Remote control devices therefor
    • H04N21/42206—User interfaces specially adapted for controlling a client device through a remote control device; Remote control devices therefor characterized by hardware details

Definitions

  • the invention relates to an image displaying system, comprising a display device and a remote control unit, said remote control unit comprising a light emitting pointer device and a detector for detecting light emanating from the display device, the pointer device and the detector having corresponding lines of sight, and to a remote control unit for such a system.
  • US-A-5 793 361 discloses an image displaying system of this type wherein the remote control unit or pointing interface may include a narrow beam light source, for example a laser pointer, as light emitting pointer device.
  • a narrow beam light source for example a laser pointer
  • the use of a pointer device in a remote control unit increases the power consumption of the remote control unit thereby decreasing battery life of the unit significantly.
  • the use of a laser pointer causes safety problems as laser pointers can blind the human eye.
  • US-A-4687 918 discloses a laser pointer with remote directional activation to be used in a system for pointing out images or the like projected onto a viewing screen.
  • This known laser pointer is only activated when the laser pointer is directed at the viewing screen.
  • optical transmitters are attached to the periphery of the viewing screen and a detector is added to the tip of the laser pointer.
  • the invention aims to provide an improved image displaying system with remote control unit of the above-mentioned type.
  • an image displaying system is provided characterized by a circuit for switching on and off the pointer device in dependence on an output signal of the detector indicating the receipt of light emanating from the display device, wherein the pointer device is switched on if said output signal indicates the receipt of light and is switched off if said output signal indicates that no light is received.
  • the light emanating from the display device is advantageously used to switch on and off the light emitting pointer device of the remote control unit.
  • the invention further provides a remote control unit for such an image displaying system, comprising a light emanating pointer device and a detector for detecting light emanating from a display device, the pointer device and the detector having corresponding lines of sight, characterized by a circuit for switching on and off the pointer device in dependence on an output signal of the detector indicating the receipt of light emanating from the display device, wherein the pointer device is switched on if said output signal indicates the receipt of light and is switched off if said output signal indicates that no light is received.
  • a remote control unit for such an image displaying system, comprising a light emanating pointer device and a detector for detecting light emanating from a display device, the pointer device and the detector having corresponding lines of sight, characterized by a circuit for switching on and off the pointer device in dependence on an output signal of the detector indicating the receipt of light emanating from the display device, wherein the pointer device is switched on if said output signal indicates the receipt of light and is switched off if said output signal indicates that no light is
  • Fig. 1 schematically shows a perspective view of an embodiment of the image displaying system and remote control unit according to the invention.
  • Fig. 2 shows a block diagram of the remote control unit of fig. 1.
  • a television apparatus 1 as an example of an image displaying system according to the invention.
  • image displaying devices are a computer system, a multi-screen video wall or the like.
  • the television apparatus 1 comprises a display device 2 which can be made as a CRT for example.
  • the television apparatus 1 further comprises a remote control unit 3 allowing improved control flexibility to the user of the television apparatus 1.
  • the remote control unit 3 comprises a light emitting pointer device 4 schematically shown in a block diagram of the remote control unit 3 in fig. 2.
  • the pointer device 4 is made as a laser pointer providing a narrow light beam 5 shown by a dashed line in fig. 1.
  • a user of the television system 1 can point the remote control unit 3 at an icon presented on the display device 2 in a suitable graphical user interface and can then click the selected icon to activate the corresponding function.
  • the activation of the selected icon can be detected by circuitry of the television system 1 not further shown by means of a detector 6 for detecting light emanating from the display device 2.
  • the emanating light beam is also indicated by the dashed line 5 in fig. 1.
  • the circuitry calculates the x-y co-ordinates of the location at which the remote control unit 3 is pointed by calculating the time between the start of the scanning phase and the moment the detector 6 senses light from the display device 2, i.e. the pixel(s) at which the remote control unit 3 is pointed.
  • this calculation circuitry is not part of the present invention no further details will be described of this control function of the remote control unit 3.
  • the detector 6 will regularly provide a detection signal output as long as the remote control unit 3 is directed at the display device 2. This means that the detector 6 will provide a detection signal with the repetition rate of the frame frequency of the display device 2, for example 20 ms for PAL and 16.7 ms for NTSC.
  • the output signal of the detector 6 is provided to a circuit 7 for switching on and off the pointer device 4.
  • the circuit 7 includes a first circuit 8 and a delay circuit 9 both receiving the output signal of the detector 6.
  • Circuit 8 switches the pointer device on, whereas the delay circuit 9 provides a switch-off signal to the circuit 8 resulting in switching off of the pointer device 4.
  • the delay circuit 9 is a timer providing a delay of for example 62 ms in providing the switch-off signal to the circuit 8 if no output signal is received from the detector 6 anymore. As long as the detector 6 provides a detection output signal at each complete scan of the display device 2, the timer is reset, so that the delay circuit 9 will not provide a switch-off signal.
  • the pointer device 4 will be switched off 62 ms after diverting the remote control unit 3 of the display device 2 or if a person comes in between the remote control unit 3 and the display device 2. In this manner it is guaranteed that the light beam of the pointer device 4 will not hit a human or animal eye. Moreover, battery life of the remote control unit 3 will be significantly lengthened.
  • Switching off with a delay of approximately 62 ms allows for errors of missing light radiated by the pixel(s) at which the remote control unit 3 is pointed up to three times and to provide a fast enough response time in switching off the pointer device 4.
  • the delay time can be made adjustable in any suitable manner.

Landscapes

  • Engineering & Computer Science (AREA)
  • Human Computer Interaction (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Position Input By Displaying (AREA)
  • Overhead Projectors And Projection Screens (AREA)
EP01967132A 2000-07-25 2001-07-06 Bildanzeigesystem und fernsteuerungs-vorrichtung für ein solches system Withdrawn EP1305697A2 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
SG200004160 2000-07-25
SG200004160A SG89339A1 (en) 2000-07-25 2000-07-25 Image displaying system and remote control unit for such a system
PCT/EP2001/007846 WO2002008848A2 (en) 2000-07-25 2001-07-06 Image displaying system and remote control unit for such a system

Publications (1)

Publication Number Publication Date
EP1305697A2 true EP1305697A2 (de) 2003-05-02

Family

ID=20430632

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01967132A Withdrawn EP1305697A2 (de) 2000-07-25 2001-07-06 Bildanzeigesystem und fernsteuerungs-vorrichtung für ein solches system

Country Status (4)

Country Link
EP (1) EP1305697A2 (de)
JP (1) JP2004505339A (de)
SG (1) SG89339A1 (de)
WO (1) WO2002008848A2 (de)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102956098B (zh) * 2012-11-02 2014-04-02 京东方科技集团股份有限公司 远距离光线遥控方法、遥控终端、显示设备及系统
CN108628571B (zh) * 2018-03-29 2021-01-15 西安电子科技大学 一种显示屏节能方法

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0199868A1 (de) * 1985-05-03 1986-11-05 Hughes Technology Pty Ltd. Laserlichtzeiger mit Sicherung
EP1168232B1 (de) * 1994-06-09 2004-03-03 Corporation for National Research Initiatives Hinweisvorrichtungsschittstelle
US5926168A (en) * 1994-09-30 1999-07-20 Fan; Nong-Qiang Remote pointers for interactive televisions
US5451765A (en) * 1994-10-31 1995-09-19 Gerber; Peter Eye safety protection system for a laser transmission system wherein laser energy scattered back along the beam path is detected
EP0741882B1 (de) * 1994-11-24 1999-04-07 Koninklijke Philips Electronics N.V. Datenverarbeitungssystem mit einem graphischen tablett und einem griffel und griffel zur verwendung in einem solchen system
US5837996A (en) * 1994-12-02 1998-11-17 Keydar; Eytan Eye protection system wherein a low power laser controls a high power laser
DE19649596A1 (de) * 1996-11-29 1998-06-04 Deutsche Telekom Ag Vorrichtung zur Ansteuerung eines einen Bildschirm umfassenden Geräts

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO0208848A2 *

Also Published As

Publication number Publication date
SG89339A1 (en) 2002-06-18
JP2004505339A (ja) 2004-02-19
WO2002008848A2 (en) 2002-01-31
WO2002008848A3 (en) 2002-11-28

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