EP1656001A1 - Blinkleuchtensteuergerät und Steuerverfahren desselben - Google Patents

Blinkleuchtensteuergerät und Steuerverfahren desselben Download PDF

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Publication number
EP1656001A1
EP1656001A1 EP04026001A EP04026001A EP1656001A1 EP 1656001 A1 EP1656001 A1 EP 1656001A1 EP 04026001 A EP04026001 A EP 04026001A EP 04026001 A EP04026001 A EP 04026001A EP 1656001 A1 EP1656001 A1 EP 1656001A1
Authority
EP
European Patent Office
Prior art keywords
pulse signal
general purpose
output
purpose input
pins
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.)
Granted
Application number
EP04026001A
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English (en)
French (fr)
Other versions
EP1656001B1 (de
Inventor
Jung-Yuan Tsai
Kuo-Feng Chen
Chung-An Chien
Wei-Shao Chen
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.)
HTC Corp
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High Tech Computer Corp
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Publication date
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Priority to EP04026001A priority Critical patent/EP1656001B1/de
Publication of EP1656001A1 publication Critical patent/EP1656001A1/de
Application granted granted Critical
Publication of EP1656001B1 publication Critical patent/EP1656001B1/de
Ceased legal-status Critical Current
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    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B47/00—Circuit arrangements for operating light sources in general, i.e. where the type of light source is not relevant
    • H05B47/10—Controlling the light source
    • H05B47/165—Controlling the light source following a pre-assigned programmed sequence; Logic control [LC]
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
    • H05B45/30—Driver circuits
    • H05B45/32—Pulse-control circuits

Definitions

  • the present invention relates to a light control method, specifically relates to a flashing light control method and apparatus thereof.
  • a low pulse signal 100 controls a switching device 104 that makes a light emitting diode 102 flash.
  • the low pulse signal 100 there are two methods of generating the low pulse signal 100.
  • One is to use a program to control a counter in a CPU to output the pulse signals from the general purpose input/output pins.
  • the pulse signals make the switching devices switch the light emitting diodes on/off.
  • the CPU has to keep working in this method, which increase the power consumption of the electrical products. Additionally, the working efficiency of the CPU is reduced because the partial calculation period is used to generate the pulse signals.
  • Another method is to use an oscillation circuit to generate pulse signals with a fixed period to make the switching device switch the light emitting diodes on/off.
  • an additional oscillation circuit is required in this method, which increase the cost and the volume of the electrical products.
  • the oscillation circuit can only generate a pulse signal with a fixed period. Therefore, the flashing period is also fixed, which limits the application range thereof.
  • a pulse signal generator inside a CPU is typically used to resolve the problem of fixed period resulting from use of the oscillation circuit.
  • This pulse signal generator is used to provide a pulse signal whose period is modulated by the CPU.
  • a pulse signal generator can only provide a pulse signal.
  • the number of flashing lights is related to the number of pulse signal generators inside a CPU. If the number of pulse signal generators built in a CPU is not enough, an additional pulse signal generator must be attached to the CPU, which increase the manufacturing cost and the volume of a electrical product.
  • the main purpose of the present invention is to provide a flashing light control method and apparatus thereof to make many lights flash but not increase the power consumption and volume of a electrical product.
  • Another purpose of the present invention is to provide a flashing light control method and apparatus thereof by using a pulse signal generator to make many lights flash.
  • a further purpose of the present invention is to provide a flashing light control method and apparatus thereof to control the flashing light period without reducing CPU efficiency.
  • the states of the general purpose Input/Output pins of a CPU can determine whether or not a light is triggered by a pulse signal generated by a pulse signal generator.
  • the method not only can use a pulse signal generator built in a CPU but also can use a pulse signal generator independent from a CPU.
  • FIG. 2 is a block diagram of a control circuit according to the first embodiment.
  • a CPU 200 with a low pulse generator (LPG) 202 makes lights flash by controling the states of the general purpose Input/Output (GPIO) pins 210 and thereby selecting which light flahses.
  • the pulse signal generated by the low pulse generator 202 makes the selected light flash.
  • a pulse signal controller 204 triggers a specific driving circuit in the driving circuitdriving circuit module 206 according to the states of the general purpose Input/Output (GPIO) pins 210 of the CPU 200. Then, the pulse signal received by the pulse signal controller 204 can make a specific light in the light module 208 flash through the triggered driving circuit.
  • the light module is composed of light emitting diodes respectively connected to corresponding driving circuits.
  • FIG. 3 is a control circuit diagram according to the block diagram illustrated in the figure 2. Reference is made to figure 2 and figure 3.
  • a low pulse generator (LPG) 202 is built in a CPU 200.
  • the conductive line 300, 302 and 304 connected with the low pulse generator 202 and the conductive lines 312, 314 and 316 connected with the CPU 200 are respectively connected together to form three intersections that serve as the three output points S 1 , S 2 and S 3 of the pulse signal controller 204.
  • this pin When the state of a general purpose Input/Output pin 210 is set in an Input mode, this pin has a "high" input impedance. When the state of a general purpose Input/Output pin 210 is set in an output mode, this pin is grounded. For example, when the general purpose Input/Output pin 306 is set in an Input mode, this pin has a "high” input impedance. Therefore, the output signal of the output point S 1 of the pulse signal controller 204 is the pulse signal transmitted by the conductive line 300. Conversely, when the general purpose Input/Output pin 306 is set in an output mode, this pin is grounded. The output point S 1 of the pulse signal controller 204 is also grounded.
  • the pulse signal transmitted by the conductive line 300 is reduced to a "zero" level state through the resistance R1.
  • the output signals of the three output points S 1 , S 2 and S 3 can be determined by controlling the states of the corresponding general purpose Input/Output pins.
  • the three switching devices 318, 320 and 322 are transistors. These switching devices 318, 320 and 322 are respectively controlled by the three output points S 1 , S 2 and S 3 .
  • the switching device 318 is in an "off' state because the pulse signal transmitted by the conductive line 300 is reduced to a "zero" level state through the resistance R1.
  • the corresponding GPIO pin 306 is set in an "input” mode, this pin has a "high" input impedance.
  • this "high" input impedance makes the output point S 1 output the pulse signal transmitted by the conductive line 300 to switch the switching device 318.
  • the corresponding light emitting diode 324 in the light module 208 flashes according to the switching of the switching device 318.
  • the output point S 1 is grounded to turn of the switching device 318, and the output points S 2 and S 3 respectively output the pulse signal transmitted from the conductive lines 302 and 302 to switch the switching devices 320 and 322.
  • the light emitting diode 324 is turned off because the switching device is in an "off" state.
  • the light emitting diodes 326 and 328 flash according to the switching of the switching devices 320 and 322.
  • the light emitting diodes can be kept on in the present invention.
  • the LPG 202 is turned off to stop providing the pulse signal. Therefore, the three output points S 1 , S 2 and S 3 of the pulse signal controller 204 are only controlled by the GPIO pins. For example, when the GPIO pin 306 outputs a "high" level such that the output point S 1 is also in a "high” level, the switching device 318 is kept in an "on” state, thereby making the LED 324 continuously on.
  • Figure 4 is a block diagram of a control circuit according to the second embodiment.
  • the main difference between the first and second embodiment is that an independent LPG 220 controlled by a GPIO pin of the CPU 200 is used in the second embodiment to generate the pulse signal.
  • the operation method of the first and second embodiment is the same.
  • Figure 5 is a control conditions table for making light emitting diodes (LEDs) flash.
  • LEDs light emitting diodes
  • the situation described in number 3 is that the LED 328 flashes and the LEDs 324 and 326 are off.
  • the GPIO pin 310 is set in the input mode and the GPIO pins 306 and 308 are set in the output mode.
  • the output point S 1 and S 2 are grounded. Therefore, the switching devices 318 and 320 are turned off.
  • the LED 324 and 326 are turned off.
  • the output point S 3 outputs the pulse signal transmitted by the conductive line 304 to switch the switching device 322.
  • FIG. 6 illustrates a control conditions table.
  • the situation described in number 13 is that the LEDs 326 and 328 are continually on and the LEDs 324 is off.
  • the LPG 202 is turned off to stop the flashing function.
  • the GPIO pins 308 and 310 are set in the output mode with a high level and the GPIO pin 306 is set in the output mode with a low level.
  • the output point S 1 is grounded to turn off the switching device 318. Therefore, the LED 324 is turned off.
  • the output points S 2 and S 3 output the high level signal to turn on the switching devices 320 and 322.
  • the LEDs 326 and 328 are continually turned on.
  • the situation described in number 16 is that the LEDs 324, 326 and 328 are all turned off.
  • all GPIO pins 306, 308 and 310 of the CPU 200 are set in the output mode with a low level. It is noted that the control conditions described in the figure 6 also can be used in the circuit structure illustrated in the figure 4.
  • the states of the general purpose Input/Output pins of a CPU are used to make a pulse signal controller generate an output signal.
  • This output signal selects a specific driving circuit.
  • a pulse signal generated by a pulse signal generator triggers this selected driving circuit, which then makes the corresponding light flash.
  • the pulse signal generator not only can be a pulse signal generator built in a CPU but also can be a pulse signal generator located outside a CPU and controlled by a GPIO pin of a CPU.

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EP04026001A 2004-11-03 2004-11-03 Blinkleuchtensteuergerät Ceased EP1656001B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP04026001A EP1656001B1 (de) 2004-11-03 2004-11-03 Blinkleuchtensteuergerät

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP04026001A EP1656001B1 (de) 2004-11-03 2004-11-03 Blinkleuchtensteuergerät

Publications (2)

Publication Number Publication Date
EP1656001A1 true EP1656001A1 (de) 2006-05-10
EP1656001B1 EP1656001B1 (de) 2011-07-06

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ID=34927204

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04026001A Ceased EP1656001B1 (de) 2004-11-03 2004-11-03 Blinkleuchtensteuergerät

Country Status (1)

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EP (1) EP1656001B1 (de)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1868420A2 (de) 2006-06-13 2007-12-19 High Tech Computer Corp. (HTC) Lichtansteuerungsvorrichtung
EP2295991A1 (de) * 2009-09-07 2011-03-16 VEGA Grieshaber KG Balkendiagrammanzeigevorrichtung
US8106857B2 (en) 2006-06-09 2012-01-31 Htc Corporation Light driving device
CN105723803A (zh) * 2013-11-04 2016-06-29 飞利浦照明控股有限公司 用于发光的光单元和用于驱动光单元的方法
CN107567145A (zh) * 2017-09-26 2018-01-09 宗仁科技(平潭)有限公司 Led闪灯控制电路、芯片及led灯具

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5903103A (en) * 1997-03-13 1999-05-11 Garner; Melvin C. Sequential flashing footwear
US5969479A (en) 1997-11-04 1999-10-19 Cheerine Development (Hong Kong) Ltd. Light flashing system
US20030174496A1 (en) * 2002-03-18 2003-09-18 Wong Wai Kai Novelty devices with flashing light feature

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5903103A (en) * 1997-03-13 1999-05-11 Garner; Melvin C. Sequential flashing footwear
US5969479A (en) 1997-11-04 1999-10-19 Cheerine Development (Hong Kong) Ltd. Light flashing system
US20030174496A1 (en) * 2002-03-18 2003-09-18 Wong Wai Kai Novelty devices with flashing light feature

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
JEAN-MARC IRAZABAL, STEVE BLOZIS, PAUL BOOGAARDS: "AN264 I^2C DEVICES FOR LED DISPLAY CONTROL", PHILIPS SEMICONDUCTOR - APPLICATION NOTE, 22 July 2002 (2002-07-22), pages 1 - 27, XP002319313, Retrieved from the Internet <URL:http://www.semiconductors.philips.com/acrobat_download/applicationnotes/AN264.pdf> [retrieved on 20050224] *

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8106857B2 (en) 2006-06-09 2012-01-31 Htc Corporation Light driving device
EP1868420A2 (de) 2006-06-13 2007-12-19 High Tech Computer Corp. (HTC) Lichtansteuerungsvorrichtung
EP1868420A3 (de) * 2006-06-13 2008-12-03 High Tech Computer Corp. (HTC) Lichtansteuerungsvorrichtung
EP2295991A1 (de) * 2009-09-07 2011-03-16 VEGA Grieshaber KG Balkendiagrammanzeigevorrichtung
US8553052B2 (en) 2009-09-07 2013-10-08 Vega Grieshaber Kg Display device
CN105723803A (zh) * 2013-11-04 2016-06-29 飞利浦照明控股有限公司 用于发光的光单元和用于驱动光单元的方法
CN105723803B (zh) * 2013-11-04 2018-03-23 飞利浦照明控股有限公司 用于发光的光单元和用于驱动光单元的方法
CN107567145A (zh) * 2017-09-26 2018-01-09 宗仁科技(平潭)有限公司 Led闪灯控制电路、芯片及led灯具

Also Published As

Publication number Publication date
EP1656001B1 (de) 2011-07-06

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