WO2011092051A1 - Detektorschaltung und verfahren zum betreiben einer detektorschaltung - Google Patents
Detektorschaltung und verfahren zum betreiben einer detektorschaltung Download PDFInfo
- Publication number
- WO2011092051A1 WO2011092051A1 PCT/EP2011/050226 EP2011050226W WO2011092051A1 WO 2011092051 A1 WO2011092051 A1 WO 2011092051A1 EP 2011050226 W EP2011050226 W EP 2011050226W WO 2011092051 A1 WO2011092051 A1 WO 2011092051A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- detector circuit
- input node
- interface protocol
- pwm
- operating
- Prior art date
Links
Classifications
-
- 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]
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F13/00—Interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
-
- 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
- H05B47/175—Controlling the light source by remote control
- H05B47/18—Controlling the light source by remote control via data-bus transmission
Definitions
- the present invention relates to a detector circuit and a method for operating a detector circuit.
- LEDs Light Emitting Diodes
- PDAs personal digital assistants
- Their advantageous properties such as compactness, brightness, low power consumption and Ver ⁇ availability in different colors, making them particularly suitable for use in compact devices.
- LEDs are used as flashing beacons in digital cameras and camera phones or as backlighting for mobile phones, small screens or measuring devices.
- drivers are used that are mostly configurable and operate the LEDs used.
- the degree of configurability usually depends on the price specifications of the manufacturer and, depending on the specification, includes different complex interface standards.
- PWM Pulse width modulation ⁇
- I 2 C Inter-Integrated Circuit I 2 C
- GPOs General Purpose Outputs
- PWM generators are not available.
- driver circuits in an implementation is chosen to be at the internal current sources, a current via a DAC (digital analog converter) is set and the brightness of the LEDs ver ⁇ applied is then changed by PWM topologies. Due to the internal power sources, this procedure is asynchronous, ie independent of external systems. If the developer wants to run a driver circuit in sync with external systems, he chooses the PWM topology.
- An external Sys tem ⁇ is in this case, a PWM generator which can alternatively comprise a PMIC (power management IC), a base band, host processor, micro-controller or a simple PWM generator module.
- PMIC power management IC
- a detector circuit has a connection for a voltage supply and a connection for connecting a luminous means, which is connected to the connection for a voltage supply.
- the detector circuit has a first control module of a first interface protocol and a second control module of a second interface protocol, which in turn are connected to the connection for connecting a light ⁇ means.
- the detector circuit has a first input node and a second input node. In this case, the first control module with the first input node and the second input node and the second control module with the second input node is connected.
- a detector for determining an interface standard is coupled on the one hand to the connection for a voltage supply and to the first input node and on the other hand to ground.
- interface protocol refers to an agreement according to which a connection, communication or data transmission between two electronic components takes place.
- characteristic signals are present at the first input node and / or at the second input node. These signals are each characteristic of the interface protocol used and can thus be fundamentally different. For example, for a first interface protocol, signals may be present both at the first input node and at the second input node, while for a second interface protocol, a characteristic signal may be present only at the second input node.
- the detector it is then possible to measure signals at the first and second input node and, in turn determine which interface protocol is used in jeweili ⁇ gen case. As a result, it is then possible to activate the corresponding first or second control module for further signal processing on the detector circuit.
- the detector circuit has the Kontrollbau ⁇ stones via appropriate means that are designed for operation according to the respective interface protocol and configurable via the input node.
- the detector circuit comprises a detector with a current source.
- the power source is connected to the terminal for a power supply and the first input node. With the aid of the current source, a voltage can be used as a characteristic signal for determining the interface protocol at the first input node.
- the detector circuit comprises a comparator.
- the signal at the ers ⁇ th input node preferably a voltage signal with a refer- ence, or a reference voltage to ver ⁇ same.
- the signal at the ers ⁇ th input node preferably a voltage signal with a refer- ence, or a reference voltage to ver ⁇ same.
- the detector comprises a logic gate.
- the first control module for operating a luminous means according to the I 2 C standard and the second control module for operating a luminous means are designed according to a PWM interface protocol.
- the I 2 C standard and the PWM interface protocol are common and simple implementations used in many switching devices. If corresponding and characteristic signals of the different interface protocols are present at the first and at the second input node, they can be distinguished by the detector and transmitted to the corresponding control modules.
- the con- troll blocks are received, decode the genetic ⁇ through the interface information and operate, for example, with a pre Schlos ⁇ senes light sources such as an LED.
- an external resistor is connected to the first input node.
- a constant voltage is dropped across the resistor connected to the first input node. This can be used as a characteristic signal for determining the interface protocol who ⁇ . If, for example, the PWM standard is used, then it is only necessary to communicate via a connection, here preferably via the second input node. At the same time, however, there is a constant voltage at the first input node, so that a distinction can be made between the two interface protocols with the aid of the detector, for example the comparator. By specifying a suitably dimensioned resistor, the voltage at the first input node can be approximately selected so that confusion of the signal with a data signal in accordance with one of the cut ⁇ protocols can be excluded.
- the detector circuit comprises at least one load current source for driving a
- Illuminant This is connected to the first control module or the second control module.
- the circuit for driving a luminous means comprises a charge pump, which is connected to the connection for a voltage supply and to the load current source.
- a connected light source can be operated advantageously and over wide areas operate with constant current regardless of fluctuations in the supply voltage, such as a battery voltage.
- the detector circuit is designed as an integrated circuit.
- a signal is detected at a first input node of the detector circuit.
- the Detektorschal- processing is then placed in a first operating condition according to a first interface protocol or into a second operating state corresponding to a second Thomasstellenpro ⁇ Protocol.
- the offset takes place as a function of the detected signal.
- the method includes the step to operate a lighting means according to the first sectional ⁇ protocol or according to a second section ⁇ protocol.
- the method for operating a detector circuit allows detection of the interface protocol.
- a particular use is made by external components and / or by specifying certain signal characteristics of a
- the method of operating a detector circuit includes detecting the signal at the first input node by providing a current at the first input node and measuring a voltage across a resistor.
- a particular interface protocol be ⁇ right turn signal characteristics, as detected during the process and define the different operating modes.
- Such signals are in accordance with the gcardi ⁇ gen interface protocols usually stresses that are modulated according to certain specifications or display characteristic time ⁇ gradients.
- a voltage having a specific value or providing a current, preferably a constant current, represents a suitable means for again determining an interface protocol.
- the clamping ⁇ voltage or the current can be chosen such that it is not a data signal according to a protocol and as a measure ⁇ represents that a specific protocol is not being used.
- the first operating state for driving a lighting means according to the I 2 C standard, and the second operating state of operating a lighting means ge ⁇ Mäss a PWM interface protocol is designed.
- Figure 2A shows an embodiment of the detector circuit for
- FIG. 2B shows an exemplary embodiment of the detector circuit for
- Figure 3 shows an embodiment of the detector circuit as an integrated circuit.
- FIG. 1 shows an embodiment of a detector circuit according to the proposed principle.
- the detector circuit comprises a first control module I2C and a load current source ILED.
- the first control module I2C is connected to a first input node Inl and a second input node In2, and coupled via a current source Idet to the connection for a supply voltage Vbat.
- the first control module I2C is further connected via three current sources II, 12, 13 of the load current source ILED respectively to the load connection nodes LI, L2, L3.
- At the load output nodes LI, L2, L3 are each a light emitting diode LED1, LED2 and LED3 connected and coupled to ground GND.
- the detector circuit also has a connection for ground GND.
- input signals are present at the first and second input nodes Inl, In2. These can be generated in ⁇ example by a first generator host, which is operated according to the I 2 C standard. So lie then At the first input node, Inl data signals SDA and at the second input node In2, clock signals SCL. This Sig ⁇ signals will be detected by a detector and forwarded to the first control modules I2C. Detection is carried out for example by means of a comparator and a clamping ⁇ voltage measurement at the first input node. Such a comparator is advantageously already integrated in control modules according to the I 2 C standard and can be used accordingly.
- the comparator compares whether the provided by the Stromquel- le Idet current drives the externally connected resistor Rset that is used PWM interface standard for operation of the circuit according to the order speak the current set ⁇ .
- signals may be present at the first and second input nodes according to a PWM interface standard.
- a PMIC Power Management Integrated Circuit
- Pulse width modulated data signals EN are then applied to the second input node.
- the first input node Inl is kept at a constant signal level or at a constant voltage EXT via an externally connected resistor Rset. This is preferably done with the aid of a current source Idet connected to the connection for a supply voltage, which causes the constant voltage Ext to drop across the externally connected resistor Rset.
- the first control module I2C is inactive, because in its operation both signals should be applied according to the I 2 C standard at both the first and the second input node Inl, In2.
- modulated input signals EN can be forwarded directly to the load current source LED or egg ⁇ NEN second PWM control block (not shown).
- the detector circuit is operated in either an I 2 C mode or a PWM mode. In this case, when the I 2 C mode is active, the circuit can not be operated in PWM mode and vice versa. It is in the
- the PWM mode uses the first input node Inl as the external pin to set the load current source LED.
- the first input node Inl is used, for example, to switch on and off the load current source for operating LEDs.
- signals of a suitable PWM generator modulated at the pin PWM are preferably used.
- the current of the load current source is not set via the first input node Inl or externally connected resistor Rset.
- the adjustment then takes place by signals according to the I 2 C standard at the first and second input nodes Inl, In2.
- a DAC digital / analog converter
- the detector circuit thus detects whether it is in I 2 C or in PWM mode. This is done at the start of the circuit, such as when a battery is inserted to power. If the externally connected resistor Rset be ⁇ closed, a current through the load current source LED and through the resistor Rset will flow. This sets a certain voltage across the resistor Rset, which queries the comparator. If this voltage does not set, ie the current of the load current source can not flow through the resistor, because no resistor Rset is connected externally, the detector circuit is in I 2 C mode.
- the detector circuit for the use of different interface standards. turn.
- the same detector circuit can thus be used in different product lines as a common basis.
- a particular use is determined externally by specifying the ex ternal voltage Ext ⁇ or the interface protocol on ERS th input node Inl.
- the detector circuit has with the first and optionally second control module I2C, PWM via corresponding means, which are designed for operation according to the respective interface ⁇ protocol and configurable via the Ein ⁇ gang nodes Inl, In2.
- the current through the load current source LED across the external resistor Rset is set and is used at the same time this is advantageous to recognize whether the De ⁇ tektorscnies in the I 2 C-mode or the PWM mode is operated .
- FIG. 2A shows the detector circuit according to FIG. 1 for use according to the I 2 C standard.
- a castle ⁇ NEN generator host are at the first input node and the second input node of data signals SDA or SCL to Taktsig- dimensional. These are generated according to the I 2 C standard by means of a voltage source Vdd and the resistors Rl and R2.
- the first control block I 2 C is configured in which it the data signals SDA and SCL clock signals taps on the first and th two ⁇ input node Inl, In2. According to this configuration, the connected LEDs LED1, LED2, LED3 are operated.
- Figure 2B shows an alternative embodiment according Fi gur ⁇ 1 for operation of the detector circuit according to the PWM interface standard.
- a power management IC PMIC which generates pulse-width modulated output data EN, which are applied to the second input node In2.
- the first input node Inl is kept at the constant voltage EXT via an externally connected resistor Rset. This voltage is generated via the current source Idet, which is coupled between the terminal for a supply voltage Vbat and the first input node Inl.
- FIG. 3 shows an integrated circuit according to the proposed principle.
- the detector circuit additionally comprises with respect to the detector circuit according to Figure 1 is still a charge pump CP, which is coupled between the connection for a versor ⁇ supply voltage Vbat and the load current ILED source.
- a second control module PWM is provided for the implementation of the PWM interface standard.
- an output node Vout is provided on which an output voltage can be tapped off.
- LED1 first light-emitting diode
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- Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Dc-Dc Converters (AREA)
- Electronic Switches (AREA)
- Led Devices (AREA)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US13/575,026 US8981674B2 (en) | 2010-01-27 | 2011-01-10 | Detector circuit and method for operating a detector circuit |
CN201180007248.5A CN102771189B (zh) | 2010-01-27 | 2011-01-10 | 检测器电路和用于操作检测器电路的方法 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102010005907.2A DE102010005907B4 (de) | 2010-01-27 | 2010-01-27 | Detektorschaltung und Verfahren zum Betreiben einer Detektorschaltung |
DE102010005907.2 | 2010-01-27 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2011092051A1 true WO2011092051A1 (de) | 2011-08-04 |
Family
ID=43901570
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2011/050226 WO2011092051A1 (de) | 2010-01-27 | 2011-01-10 | Detektorschaltung und verfahren zum betreiben einer detektorschaltung |
Country Status (4)
Country | Link |
---|---|
US (1) | US8981674B2 (de) |
CN (1) | CN102771189B (de) |
DE (1) | DE102010005907B4 (de) |
WO (1) | WO2011092051A1 (de) |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2603055A1 (de) * | 2011-12-09 | 2013-06-12 | Eaton Industries GmbH | Verfahren zur Ansteuerung einer Mehrfarben-Signalanordnung sowie Mehrfarben-Signalanordnung |
TWI477788B (zh) * | 2012-04-10 | 2015-03-21 | Realtek Semiconductor Corp | 偵測發光二極體短路的方法及其裝置 |
DE102014217070A1 (de) | 2013-08-28 | 2015-03-05 | Elmos Semiconductor Aktiengesellschaft | Vorrichtung zur Versorgung mindestens eines Verbrauchers mit elektrischer Energie bzw. zur Bereitstellung elektrischer Leistung für mindestens einen Verbraucher |
DE102013112127A1 (de) | 2013-11-05 | 2015-05-07 | Eaton Electrical Ip Gmbh & Co. Kg | Mehrfarbensignalanordnung, Verfahren zur Definition von Betriebsarten einer Mehrfarbensignalanordnung und System, aufweisend eine Mehrfarbensignalanordnung und eine RFID Sendeeinrichtung |
DE102014012787A1 (de) | 2014-08-27 | 2016-03-17 | Elmos Semiconductor Aktiengesellschaft | Verfahren zur Regelung des Betriebsstromes einer LED-Leuchteneinheit |
DE102014012789B4 (de) | 2014-08-27 | 2023-08-24 | Elmos Semiconductor Se | Vorrichtung zur Regelung des Betriebsstromes einer LED-Leuchteneinheit |
DE102014012790B4 (de) | 2014-08-27 | 2023-08-24 | Elmos Semiconductor Se | Verfahren zur Regelung des Betriebsstromes einer Brückenschaltung |
WO2017129490A1 (en) * | 2016-01-27 | 2017-08-03 | Philips Lighting Holding B.V. | System and method for modular control |
US11144493B1 (en) | 2018-05-02 | 2021-10-12 | Ecosense Lighting Inc. | Composite interface circuit |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20080100224A1 (en) * | 2006-10-31 | 2008-05-01 | Felder Matthew D | System on a chip with backlight controller |
US20080136334A1 (en) * | 2006-12-12 | 2008-06-12 | Robinson Shane P | System and method for controlling lighting |
DE102007011646A1 (de) * | 2007-03-09 | 2008-09-11 | Tridonicatco Gmbh & Co. Kg | Extern konfigurierbar integrierbare Steuerschaltung für Betriebsgeräte für Leuchtmittel |
DE102007011648A1 (de) * | 2007-03-09 | 2008-09-11 | Tridonicatco Gmbh & Co. Kg | Konfigurierung eines IC eines elektronischen Vorschaltgeräts |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8204565B2 (en) | 2005-04-04 | 2012-06-19 | University Of Iowa Research Foundation | Reagentless optical analyte detection system |
TWI260567B (en) * | 2005-06-13 | 2006-08-21 | Commence Technic Co Ltd | Direct transmission method and interface of low-voltage differential signal |
US20070085786A1 (en) * | 2005-10-14 | 2007-04-19 | Jacky Lin | System and method for driving keypad backlight with balance-dimming capability |
US20070268236A1 (en) * | 2006-05-17 | 2007-11-22 | Neil Morrow | Methods and systems for LCD backlight color control |
-
2010
- 2010-01-27 DE DE102010005907.2A patent/DE102010005907B4/de not_active Expired - Fee Related
-
2011
- 2011-01-10 US US13/575,026 patent/US8981674B2/en active Active
- 2011-01-10 CN CN201180007248.5A patent/CN102771189B/zh not_active Expired - Fee Related
- 2011-01-10 WO PCT/EP2011/050226 patent/WO2011092051A1/de active Application Filing
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20080100224A1 (en) * | 2006-10-31 | 2008-05-01 | Felder Matthew D | System on a chip with backlight controller |
US20080136334A1 (en) * | 2006-12-12 | 2008-06-12 | Robinson Shane P | System and method for controlling lighting |
DE102007011646A1 (de) * | 2007-03-09 | 2008-09-11 | Tridonicatco Gmbh & Co. Kg | Extern konfigurierbar integrierbare Steuerschaltung für Betriebsgeräte für Leuchtmittel |
DE102007011648A1 (de) * | 2007-03-09 | 2008-09-11 | Tridonicatco Gmbh & Co. Kg | Konfigurierung eines IC eines elektronischen Vorschaltgeräts |
Also Published As
Publication number | Publication date |
---|---|
US8981674B2 (en) | 2015-03-17 |
DE102010005907A1 (de) | 2011-07-28 |
US20120326633A1 (en) | 2012-12-27 |
CN102771189B (zh) | 2014-09-24 |
DE102010005907B4 (de) | 2015-06-11 |
CN102771189A (zh) | 2012-11-07 |
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